[WIP] started to add TinyCC backend

CMakeLists.txt

@@ -44,15 +44,17 @@ add_subdirectory(softfloat)
 FILE(GLOB RiscVSCHeaders ${CMAKE_CURRENT_SOURCE_DIR}/incl/sysc/*.h ${CMAKE_CURRENT_SOURCE_DIR}/incl/sysc/*/*.h)
 set(LIB_HEADERS ${RiscVSCHeaders} )
 set(LIB_SOURCES 
-	src/iss/rv32gc.cpp
+	#src/iss/rv32gc.cpp
 	src/iss/rv32imac.cpp
-	src/iss/rv64i.cpp
+	#src/iss/rv64i.cpp
-	src/iss/rv64gc.cpp
+	#src/iss/rv64gc.cpp
-	src/internal/fp_functions.cpp
+	src/iss/mnrv32.cpp
-	src/internal/vm_rv32gc.cpp
+	src/vm/llvm/fp_functions.cpp
-	src/internal/vm_rv32imac.cpp
+	#src/vm/llvm/vm_rv32gc.cpp
-	src/internal/vm_rv64i.cpp
+	src/vm/llvm/vm_rv32imac.cpp
-	src/internal/vm_rv64gc.cpp
+	#src/vm/llvm/vm_rv64i.cpp
+	#src/vm/llvm/vm_rv64gc.cpp
+	src/vm/tcc/vm_mnrv32.cpp
     src/plugin/instruction_count.cpp
     src/plugin/cycle_estimate.cpp)
 
@@ -62,15 +64,12 @@ set(LIBRARY_NAME riscv)
 # Define the library
 add_library(${LIBRARY_NAME} ${LIB_SOURCES})
 SET(${LIBRARY_NAME} -Wl,-whole-archive -l${LIBRARY_NAME} -Wl,-no-whole-archive)
-target_link_libraries(${LIBRARY_NAME} softfloat)
+target_link_libraries(${LIBRARY_NAME} softfloat dbt-core tinycc scc-util)
-target_link_libraries(${LIBRARY_NAME} dbt-core)
-target_link_libraries(${LIBRARY_NAME} scc-util)
 set_target_properties(${LIBRARY_NAME} PROPERTIES
   VERSION ${VERSION}  # ${VERSION} was defined in the main CMakeLists.
   FRAMEWORK FALSE
   PUBLIC_HEADER "${LIB_HEADERS}" # specify the public headers
 )
-#set_property(TARGET ${LIBRARY_NAME} PROPERTY POSITION_INDEPENDENT_CODE ON)
 
 if(SystemC_FOUND)
 	set(SC_LIBRARY_NAME riscv_sc)

gen_input/minres_rv.core_desc

@@ -6,6 +6,18 @@ import "RVC.core_desc"
 import "RVF.core_desc"
 import "RVD.core_desc"
 
+Core MNRV32 provides RV32I/*, RV32IC */ {
+    constants {
+        XLEN:=32;
+        PCLEN:=32;
+        // definitions for the architecture wrapper
+        //          XL    ZYXWVUTSRQPONMLKJIHGFEDCBA
+        MISA_VAL:=0b01000000000101000001000100000101;
+        PGSIZE := 0x1000; //1 << 12;
+        PGMASK := 0xfff; //PGSIZE-1
+    }
+}
+
 Core RV32IMAC provides RV32I, RV32M, RV32A, RV32IC {
     constants {
         XLEN:=32;

gen_input/templates/tcc/CORENAME_cyles.txt.gtl

@@ -0,0 +1,9 @@
+{ 
+	"${coreDef.name}" : [<%instructions.eachWithIndex{instr,index -> %>${index==0?"":","}
+		{
+			"name"  : "${instr.name}",
+			"size"  : ${instr.length},
+			"delay" : ${generator.hasAttribute(instr.instruction, com.minres.coredsl.coreDsl.InstrAttribute.COND)?[1,1]:1}
+		}<%}%>
+	]
+}

gen_input/templates/tcc/incl-CORENAME.h.gtl

@@ -0,0 +1,221 @@
+/*******************************************************************************
+ * Copyright (C) 2017, 2018 MINRES Technologies GmbH
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ *******************************************************************************/
+
+<% 
+import com.minres.coredsl.coreDsl.Register
+import com.minres.coredsl.coreDsl.RegisterFile
+import com.minres.coredsl.coreDsl.RegisterAlias
+def getTypeSize(size){
+	if(size > 32) 64 else if(size > 16) 32 else if(size > 8) 16 else 8
+}
+def getOriginalName(reg){
+    if( reg.original instanceof RegisterFile) {
+    	if( reg.index != null ) {
+        	return reg.original.name+generator.generateHostCode(reg.index)
+        } else {
+        	return reg.original.name
+        }
+    } else if(reg.original instanceof Register){
+        return reg.original.name
+    }
+}
+def getRegisterNames(){
+	def regNames = []
+ 	allRegs.each { reg -> 
+		if( reg instanceof RegisterFile) {
+			(reg.range.right..reg.range.left).each{
+    			regNames+=reg.name.toLowerCase()+it
+            }
+        } else if(reg instanceof Register){
+    		regNames+=reg.name.toLowerCase()
+        }
+    }
+    return regNames
+}
+def getRegisterAliasNames(){
+	def regMap = allRegs.findAll{it instanceof RegisterAlias }.collectEntries {[getOriginalName(it), it.name]}
+ 	return allRegs.findAll{it instanceof Register || it instanceof RegisterFile}.collect{reg ->
+		if( reg instanceof RegisterFile) {
+			return (reg.range.right..reg.range.left).collect{ (regMap[reg.name]?:regMap[reg.name+it]?:reg.name.toLowerCase()+it).toLowerCase() }
+        } else if(reg instanceof Register){
+    		regMap[reg.name]?:reg.name.toLowerCase()
+        }
+ 	}.flatten()
+}
+%>
+#ifndef _${coreDef.name.toUpperCase()}_H_
+#define _${coreDef.name.toUpperCase()}_H_
+
+#include <array>
+#include <iss/arch/traits.h>
+#include <iss/arch_if.h>
+#include <iss/vm_if.h>
+
+namespace iss {
+namespace arch {
+
+struct ${coreDef.name.toLowerCase()};
+
+template <> struct traits<${coreDef.name.toLowerCase()}> {
+
+	constexpr static char const* const core_type = "${coreDef.name}";
+    
+  	static constexpr std::array<const char*, ${getRegisterNames().size}> reg_names{
+ 		{"${getRegisterNames().join("\", \"")}"}};
+ 
+  	static constexpr std::array<const char*, ${getRegisterAliasNames().size}> reg_aliases{
+ 		{"${getRegisterAliasNames().join("\", \"")}"}};
+
+    enum constants {${coreDef.constants.collect{c -> c.name+"="+c.value}.join(', ')}};
+
+    constexpr static unsigned FP_REGS_SIZE = ${coreDef.constants.find {it.name=='FLEN'}?.value?:0};
+
+    enum reg_e {<%
+     	allRegs.each { reg -> 
+    		if( reg instanceof RegisterFile) {
+    			(reg.range.right..reg.range.left).each{%>
+        ${reg.name}${it},<%
+                }
+            } else if(reg instanceof Register){ %>
+        ${reg.name},<%  
+            }
+        }%>
+        NUM_REGS,
+        NEXT_${pc.name}=NUM_REGS,
+        TRAP_STATE,
+        PENDING_TRAP,
+        MACHINE_STATE,
+        LAST_BRANCH,
+        ICOUNT<% 
+     	allRegs.each { reg -> 
+    		if(reg instanceof RegisterAlias){ def aliasname=getOriginalName(reg)%>,
+        ${reg.name} = ${aliasname}<%
+            }
+        }%>
+    };
+
+    using reg_t = uint${regDataWidth}_t;
+
+    using addr_t = uint${addrDataWidth}_t;
+
+    using code_word_t = uint${addrDataWidth}_t; //TODO: check removal
+
+    using virt_addr_t = iss::typed_addr_t<iss::address_type::VIRTUAL>;
+
+    using phys_addr_t = iss::typed_addr_t<iss::address_type::PHYSICAL>;
+
+ 	static constexpr std::array<const uint32_t, ${regSizes.size}> reg_bit_widths{
+ 		{${regSizes.join(",")}}};
+
+    static constexpr std::array<const uint32_t, ${regOffsets.size}> reg_byte_offsets{
+    	{${regOffsets.join(",")}}};
+
+    static const uint64_t addr_mask = (reg_t(1) << (XLEN - 1)) | ((reg_t(1) << (XLEN - 1)) - 1);
+
+    enum sreg_flag_e { FLAGS };
+
+    enum mem_type_e { ${allSpaces.collect{s -> s.name}.join(', ')} };
+};
+
+struct ${coreDef.name.toLowerCase()}: public arch_if {
+
+    using virt_addr_t = typename traits<${coreDef.name.toLowerCase()}>::virt_addr_t;
+    using phys_addr_t = typename traits<${coreDef.name.toLowerCase()}>::phys_addr_t;
+    using reg_t =  typename traits<${coreDef.name.toLowerCase()}>::reg_t;
+    using addr_t = typename traits<${coreDef.name.toLowerCase()}>::addr_t;
+
+    ${coreDef.name.toLowerCase()}();
+    ~${coreDef.name.toLowerCase()}();
+
+    void reset(uint64_t address=0) override;
+
+    uint8_t* get_regs_base_ptr() override;
+    /// deprecated
+    void get_reg(short idx, std::vector<uint8_t>& value) override {}
+    void set_reg(short idx, const std::vector<uint8_t>& value) override {}
+    /// deprecated
+    bool get_flag(int flag) override {return false;}
+    void set_flag(int, bool value) override {};
+    /// deprecated
+    void update_flags(operations op, uint64_t opr1, uint64_t opr2) override {};
+
+    inline uint64_t get_icount() { return reg.icount; }
+
+    inline bool should_stop() { return interrupt_sim; }
+
+    inline phys_addr_t v2p(const iss::addr_t& addr){
+        if (addr.space != traits<${coreDef.name.toLowerCase()}>::MEM || addr.type == iss::address_type::PHYSICAL ||
+                addr_mode[static_cast<uint16_t>(addr.access)&0x3]==address_type::PHYSICAL) {
+            return phys_addr_t(addr.access, addr.space, addr.val&traits<${coreDef.name.toLowerCase()}>::addr_mask);
+        } else
+            return virt2phys(addr);
+    }
+
+    virtual phys_addr_t virt2phys(const iss::addr_t& addr);
+
+    virtual iss::sync_type needed_sync() const { return iss::NO_SYNC; }
+
+    inline uint32_t get_last_branch() { return reg.last_branch; }
+
+protected:
+    struct ${coreDef.name}_regs {<%
+     	allRegs.each { reg -> 
+    		if( reg instanceof RegisterFile) {
+    			(reg.range.right..reg.range.left).each{%>
+        uint${generator.getSize(reg)}_t ${reg.name}${it} = 0;<%
+                }
+            } else if(reg instanceof Register){ %>
+        uint${generator.getSize(reg)}_t ${reg.name} = 0;<%
+            }
+        }%>
+        uint${generator.getSize(pc)}_t NEXT_${pc.name} = 0;
+        uint32_t trap_state = 0, pending_trap = 0, machine_state = 0, last_branch = 0;
+        uint64_t icount = 0;
+    } reg;
+
+    std::array<address_type, 4> addr_mode;
+    
+    bool interrupt_sim=false;
+<%
+def fcsr = allRegs.find {it.name=='FCSR'}
+if(fcsr != null) {%>
+	uint${generator.getSize(fcsr)}_t get_fcsr(){return reg.FCSR;}
+	void set_fcsr(uint${generator.getSize(fcsr)}_t val){reg.FCSR = val;}		
+<%} else { %>
+	uint32_t get_fcsr(){return 0;}
+	void set_fcsr(uint32_t val){}
+<%}%>
+};
+
+}
+}            
+#endif /* _${coreDef.name.toUpperCase()}_H_ */

gen_input/templates/tcc/src-CORENAME.cpp.gtl

@@ -0,0 +1,117 @@
+/*******************************************************************************
+ * Copyright (C) 2017, 2018 MINRES Technologies GmbH
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ *******************************************************************************/
+ <% 
+import com.minres.coredsl.coreDsl.Register
+import com.minres.coredsl.coreDsl.RegisterFile
+import com.minres.coredsl.coreDsl.RegisterAlias
+def getOriginalName(reg){
+    if( reg.original instanceof RegisterFile) {
+    	if( reg.index != null ) {
+        	return reg.original.name+generator.generateHostCode(reg.index)
+        } else {
+        	return reg.original.name
+        }
+    } else if(reg.original instanceof Register){
+        return reg.original.name
+    }
+}
+def getRegisterNames(){
+	def regNames = []
+ 	allRegs.each { reg -> 
+		if( reg instanceof RegisterFile) {
+			(reg.range.right..reg.range.left).each{
+    			regNames+=reg.name.toLowerCase()+it
+            }
+        } else if(reg instanceof Register){
+    		regNames+=reg.name.toLowerCase()
+        }
+    }
+    return regNames
+}
+def getRegisterAliasNames(){
+	def regMap = allRegs.findAll{it instanceof RegisterAlias }.collectEntries {[getOriginalName(it), it.name]}
+ 	return allRegs.findAll{it instanceof Register || it instanceof RegisterFile}.collect{reg ->
+		if( reg instanceof RegisterFile) {
+			return (reg.range.right..reg.range.left).collect{ (regMap[reg.name]?:regMap[reg.name+it]?:reg.name.toLowerCase()+it).toLowerCase() }
+        } else if(reg instanceof Register){
+    		regMap[reg.name]?:reg.name.toLowerCase()
+        }
+ 	}.flatten()
+}
+%>
+#include "util/ities.h"
+#include <util/logging.h>
+
+#include <elfio/elfio.hpp>
+#include <iss/arch/${coreDef.name.toLowerCase()}.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+#include <ihex.h>
+#ifdef __cplusplus
+}
+#endif
+#include <cstdio>
+#include <cstring>
+#include <fstream>
+
+using namespace iss::arch;
+
+constexpr std::array<const char*, ${getRegisterNames().size}>    iss::arch::traits<iss::arch::${coreDef.name.toLowerCase()}>::reg_names;
+constexpr std::array<const char*, ${getRegisterAliasNames().size}>    iss::arch::traits<iss::arch::${coreDef.name.toLowerCase()}>::reg_aliases;
+constexpr std::array<const uint32_t, ${regSizes.size}> iss::arch::traits<iss::arch::${coreDef.name.toLowerCase()}>::reg_bit_widths;
+constexpr std::array<const uint32_t, ${regOffsets.size}> iss::arch::traits<iss::arch::${coreDef.name.toLowerCase()}>::reg_byte_offsets;
+
+${coreDef.name.toLowerCase()}::${coreDef.name.toLowerCase()}() {
+    reg.icount = 0;
+}
+
+${coreDef.name.toLowerCase()}::~${coreDef.name.toLowerCase()}() = default;
+
+void ${coreDef.name.toLowerCase()}::reset(uint64_t address) {
+    for(size_t i=0; i<traits<${coreDef.name.toLowerCase()}>::NUM_REGS; ++i) set_reg(i, std::vector<uint8_t>(sizeof(traits<${coreDef.name.toLowerCase()}>::reg_t),0));
+    reg.PC=address;
+    reg.NEXT_PC=reg.PC;
+    reg.trap_state=0;
+    reg.machine_state=0x3;
+    reg.icount=0;
+}
+
+uint8_t *${coreDef.name.toLowerCase()}::get_regs_base_ptr() {
+	return reinterpret_cast<uint8_t*>(&reg);
+}
+
+${coreDef.name.toLowerCase()}::phys_addr_t ${coreDef.name.toLowerCase()}::virt2phys(const iss::addr_t &pc) {
+    return phys_addr_t(pc); // change logical address to physical address
+}
+

gen_input/templates/tcc/vm-vm_CORENAME.cpp.gtl

@@ -0,0 +1,327 @@
+/*******************************************************************************
+ * Copyright (C) 2020 MINRES Technologies GmbH
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ *******************************************************************************/
+
+#include <iss/arch/${coreDef.name.toLowerCase()}.h>
+#include <iss/arch/riscv_hart_msu_vp.h>
+#include <iss/debugger/gdb_session.h>
+#include <iss/debugger/server.h>
+#include <iss/iss.h>
+#include <iss/llvm/vm_base.h>
+#include <util/logging.h>
+#include <strstream>
+
+#ifndef FMT_HEADER_ONLY
+#define FMT_HEADER_ONLY
+#endif
+#include <fmt/format.h>
+
+#include <array>
+#include <iss/debugger/riscv_target_adapter.h>
+
+namespace iss {
+namespace vm {
+namespace fp_impl {
+void add_fp_functions_2_module(llvm::Module *, unsigned, unsigned);
+}
+}
+
+namespace tcc {
+namespace ${coreDef.name.toLowerCase()} {
+using namespace iss::arch;
+using namespace iss::debugger;
+using namespace iss::vm::llvm;
+
+template <typename ARCH> class vm_impl : public vm_base<ARCH> {
+public:
+    using super = typename iss::vm::llvm::vm_base<ARCH>;
+    using virt_addr_t = typename super::virt_addr_t;
+    using phys_addr_t = typename super::phys_addr_t;
+    using code_word_t = typename super::code_word_t;
+    using addr_t = typename super::addr_t;
+
+    vm_impl();
+
+    vm_impl(ARCH &core, unsigned core_id = 0, unsigned cluster_id = 0);
+
+    void enableDebug(bool enable) { super::sync_exec = super::ALL_SYNC; }
+
+    target_adapter_if *accquire_target_adapter(server_if *srv) override {
+        debugger_if::dbg_enabled = true;
+        if (vm_base<ARCH>::tgt_adapter == nullptr)
+            vm_base<ARCH>::tgt_adapter = new riscv_target_adapter<ARCH>(srv, this->get_arch());
+        return vm_base<ARCH>::tgt_adapter;
+    }
+
+protected:
+    using vm_base<ARCH>::get_reg_ptr;
+
+    using this_class = vm_impl<ARCH>;
+    using compile_ret_t = std::tuple<continuation_e>;
+    using compile_func = compile_ret_t (this_class::*)(virt_addr_t &pc, code_word_t instr, std::ostringstream&);
+
+    inline const char *name(size_t index){return traits<ARCH>::reg_aliases.at(index);}
+
+    template <typename T> inline ConstantInt *size(T type) {
+        return ConstantInt::get(getContext(), APInt(32, type->getType()->getScalarSizeInBits()));
+    }
+
+    void setup_module(Module* m) override {
+        super::setup_module(m);
+        iss::vm::fp_impl::add_fp_functions_2_module(m, traits<ARCH>::FP_REGS_SIZE, traits<ARCH>::XLEN);
+    }
+
+    inline Value *gen_choose(Value *cond, Value *trueVal, Value *falseVal, unsigned size) {
+        return super::gen_cond_assign(cond, this->gen_ext(trueVal, size), this->gen_ext(falseVal, size));
+    }
+
+    compile_ret_t gen_single_inst_behavior(virt_addr_t &, unsigned int &, std::ostringstream&) override;
+
+    void gen_leave_behavior(BasicBlock *leave_blk) override;
+
+    void gen_raise_trap(uint16_t trap_id, uint16_t cause);
+
+    void gen_leave_trap(unsigned lvl);
+
+    void gen_wait(unsigned type);
+
+    void gen_trap_behavior(BasicBlock *) override;
+
+    void gen_trap_check(BasicBlock *bb);
+
+    inline Value *gen_reg_load(unsigned i, unsigned level = 0) {
+        return this->builder.CreateLoad(get_reg_ptr(i), false);
+    }
+
+    inline void gen_set_pc(virt_addr_t pc, unsigned reg_num) {
+        Value *next_pc_v = this->builder.CreateSExtOrTrunc(this->gen_const(traits<ARCH>::XLEN, pc.val),
+                                                           this->get_type(traits<ARCH>::XLEN));
+        this->builder.CreateStore(next_pc_v, get_reg_ptr(reg_num), true);
+    }
+
+    // some compile time constants
+    // enum { MASK16 = 0b1111110001100011, MASK32 = 0b11111111111100000111000001111111 };
+    enum { MASK16 = 0b1111111111111111, MASK32 = 0b11111111111100000111000001111111 };
+    enum { EXTR_MASK16 = MASK16 >> 2, EXTR_MASK32 = MASK32 >> 2 };
+    enum { LUT_SIZE = 1 << util::bit_count(EXTR_MASK32), LUT_SIZE_C = 1 << util::bit_count(EXTR_MASK16) };
+
+    std::array<compile_func, LUT_SIZE> lut;
+
+    std::array<compile_func, LUT_SIZE_C> lut_00, lut_01, lut_10;
+    std::array<compile_func, LUT_SIZE> lut_11;
+
+	std::array<compile_func *, 4> qlut;
+
+	std::array<const uint32_t, 4> lutmasks = {{EXTR_MASK16, EXTR_MASK16, EXTR_MASK16, EXTR_MASK32}};
+
+    void expand_bit_mask(int pos, uint32_t mask, uint32_t value, uint32_t valid, uint32_t idx, compile_func lut[],
+                         compile_func f) {
+        if (pos < 0) {
+            lut[idx] = f;
+        } else {
+            auto bitmask = 1UL << pos;
+            if ((mask & bitmask) == 0) {
+                expand_bit_mask(pos - 1, mask, value, valid, idx, lut, f);
+            } else {
+                if ((valid & bitmask) == 0) {
+                    expand_bit_mask(pos - 1, mask, value, valid, (idx << 1), lut, f);
+                    expand_bit_mask(pos - 1, mask, value, valid, (idx << 1) + 1, lut, f);
+                } else {
+                    auto new_val = idx << 1;
+                    if ((value & bitmask) != 0) new_val++;
+                    expand_bit_mask(pos - 1, mask, value, valid, new_val, lut, f);
+                }
+            }
+        }
+    }
+
+    inline uint32_t extract_fields(uint32_t val) { return extract_fields(29, val >> 2, lutmasks[val & 0x3], 0); }
+
+    uint32_t extract_fields(int pos, uint32_t val, uint32_t mask, uint32_t lut_val) {
+        if (pos >= 0) {
+            auto bitmask = 1UL << pos;
+            if ((mask & bitmask) == 0) {
+                lut_val = extract_fields(pos - 1, val, mask, lut_val);
+            } else {
+                auto new_val = lut_val << 1;
+                if ((val & bitmask) != 0) new_val++;
+                lut_val = extract_fields(pos - 1, val, mask, new_val);
+            }
+        }
+        return lut_val;
+    }
+
+private:
+    /****************************************************************************
+     * start opcode definitions
+     ****************************************************************************/
+    struct InstructionDesriptor {
+        size_t length;
+        uint32_t value;
+        uint32_t mask;
+        compile_func op;
+    };
+
+    const std::array<InstructionDesriptor, ${instructions.size}> instr_descr = {{
+         /* entries are: size, valid value, valid mask, function ptr */<%instructions.each{instr -> %>
+        /* instruction ${instr.instruction.name} */
+        {${instr.length}, ${instr.value}, ${instr.mask}, &this_class::__${generator.functionName(instr.name)}},<%}%>
+    }};
+ 
+    /* instruction definitions */<%instructions.eachWithIndex{instr, idx -> %>
+    /* instruction ${idx}: ${instr.name} */
+    compile_ret_t __${generator.functionName(instr.name)}(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){<%instr.code.eachLine{%>
+    	${it}<%}%>
+    }
+    <%}%>
+    /****************************************************************************
+     * end opcode definitions
+     ****************************************************************************/
+    compile_ret_t illegal_intruction(virt_addr_t &pc, code_word_t instr, std::stringstream& os) {
+		this->gen_sync(iss::PRE_SYNC, instr_descr.size());
+        this->builder.CreateStore(this->builder.CreateLoad(get_reg_ptr(traits<ARCH>::NEXT_PC), true),
+                                   get_reg_ptr(traits<ARCH>::PC), true);
+        this->builder.CreateStore(
+            this->builder.CreateAdd(this->builder.CreateLoad(get_reg_ptr(traits<ARCH>::ICOUNT), true),
+                                     this->gen_const(64U, 1)),
+            get_reg_ptr(traits<ARCH>::ICOUNT), true);
+        pc = pc + ((instr & 3) == 3 ? 4 : 2);
+        this->gen_raise_trap(0, 2);     // illegal instruction trap
+		this->gen_sync(iss::POST_SYNC, instr_descr.size());
+        this->gen_trap_check(this->leave_blk);
+        return BRANCH;
+    }
+};
+
+template <typename CODE_WORD> void debug_fn(CODE_WORD insn) {
+    volatile CODE_WORD x = insn;
+    insn = 2 * x;
+}
+
+template <typename ARCH> vm_impl<ARCH>::vm_impl() { this(new ARCH()); }
+
+template <typename ARCH>
+vm_impl<ARCH>::vm_impl(ARCH &core, unsigned core_id, unsigned cluster_id)
+: vm_base<ARCH>(core, core_id, cluster_id) {
+    qlut[0] = lut_00.data();
+    qlut[1] = lut_01.data();
+    qlut[2] = lut_10.data();
+    qlut[3] = lut_11.data();
+    for (auto instr : instr_descr) {
+        auto quantrant = instr.value & 0x3;
+        expand_bit_mask(29, lutmasks[quantrant], instr.value >> 2, instr.mask >> 2, 0, qlut[quantrant], instr.op);
+    }
+}
+
+template <typename ARCH>
+std::tuple<continuation_e>
+vm_impl<ARCH>::gen_single_inst_behavior(virt_addr_t &pc, unsigned int &inst_cnt, std::ostringstream& os) {
+    // we fetch at max 4 byte, alignment is 2
+    enum {TRAP_ID=1<<16};
+    code_word_t insn = 0;
+    const typename traits<ARCH>::addr_t upper_bits = ~traits<ARCH>::PGMASK;
+    phys_addr_t paddr(pc);
+    auto *const data = (uint8_t *)&insn;
+    paddr = this->core.v2p(pc);
+    if ((pc.val & upper_bits) != ((pc.val + 2) & upper_bits)) { // we may cross a page boundary
+        auto res = this->core.read(paddr, 2, data);
+        if (res != iss::Ok) throw trap_access(TRAP_ID, pc.val);
+        if ((insn & 0x3) == 0x3) { // this is a 32bit instruction
+            res = this->core.read(this->core.v2p(pc + 2), 2, data + 2);
+        }
+    } else {
+        auto res = this->core.read(paddr, 4, data);
+        if (res != iss::Ok) throw trap_access(TRAP_ID, pc.val);
+    }
+    if (insn == 0x0000006f || (insn&0xffff)==0xa001) throw simulation_stopped(0); // 'J 0' or 'C.J 0'
+    // curr pc on stack
+    ++inst_cnt;
+    auto lut_val = extract_fields(insn);
+    auto f = qlut[insn & 0x3][lut_val];
+    if (f == nullptr) {
+        f = &this_class::illegal_intruction;
+    }
+    return (this->*f)(pc, insn, this_block);
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_leave_behavior(BasicBlock *leave_blk) {
+    this->builder.SetInsertPoint(leave_blk);
+    this->builder.CreateRet(this->builder.CreateLoad(get_reg_ptr(arch::traits<ARCH>::NEXT_PC), false));
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_raise_trap(uint16_t trap_id, uint16_t cause) {
+    auto *TRAP_val = this->gen_const(32, 0x80 << 24 | (cause << 16) | trap_id);
+    this->builder.CreateStore(TRAP_val, get_reg_ptr(traits<ARCH>::TRAP_STATE), true);
+    this->builder.CreateStore(this->gen_const(32U, std::numeric_limits<uint32_t>::max()), get_reg_ptr(traits<ARCH>::LAST_BRANCH), false);
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_leave_trap(unsigned lvl) {
+    std::vector<Value *> args{ this->core_ptr, ConstantInt::get(getContext(), APInt(64, lvl)) };
+    this->builder.CreateCall(this->mod->getFunction("leave_trap"), args);
+    auto *PC_val = this->gen_read_mem(traits<ARCH>::CSR, (lvl << 8) + 0x41, traits<ARCH>::XLEN / 8);
+    this->builder.CreateStore(PC_val, get_reg_ptr(traits<ARCH>::NEXT_PC), false);
+    this->builder.CreateStore(this->gen_const(32U, std::numeric_limits<uint32_t>::max()), get_reg_ptr(traits<ARCH>::LAST_BRANCH), false);
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_wait(unsigned type) {
+    std::vector<Value *> args{ this->core_ptr, ConstantInt::get(getContext(), APInt(64, type)) };
+    this->builder.CreateCall(this->mod->getFunction("wait"), args);
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_trap_behavior(BasicBlock *trap_blk) {
+    this->builder.SetInsertPoint(trap_blk);
+    auto *trap_state_val = this->builder.CreateLoad(get_reg_ptr(traits<ARCH>::TRAP_STATE), true);
+    this->builder.CreateStore(this->gen_const(32U, std::numeric_limits<uint32_t>::max()),
+                              get_reg_ptr(traits<ARCH>::LAST_BRANCH), false);
+    std::vector<Value *> args{this->core_ptr, this->adj_to64(trap_state_val),
+                              this->adj_to64(this->builder.CreateLoad(get_reg_ptr(traits<ARCH>::PC), false))};
+    this->builder.CreateCall(this->mod->getFunction("enter_trap"), args);
+    auto *trap_addr_val = this->builder.CreateLoad(get_reg_ptr(traits<ARCH>::NEXT_PC), false);
+    this->builder.CreateRet(trap_addr_val);
+}
+
+template <typename ARCH> inline void vm_impl<ARCH>::gen_trap_check(BasicBlock *bb) {
+    auto *v = this->builder.CreateLoad(get_reg_ptr(arch::traits<ARCH>::TRAP_STATE), true);
+    this->gen_cond_branch(this->builder.CreateICmp(
+                              ICmpInst::ICMP_EQ, v,
+                              ConstantInt::get(getContext(), APInt(v->getType()->getIntegerBitWidth(), 0))),
+                          bb, this->trap_blk, 1);
+}
+} // namespace ${coreDef.name.toLowerCase()}
+
+template <>
+std::unique_ptr<vm_if> create<arch::${coreDef.name.toLowerCase()}>(arch::${coreDef.name.toLowerCase()} *core, unsigned short port, bool dump) {
+    auto ret = new ${coreDef.name.toLowerCase()}::vm_impl<arch::${coreDef.name.toLowerCase()}>(*core, dump);
+    if (port != 0) debugger::server<debugger::gdb_session>::run_server(ret, port);
+    return std::unique_ptr<vm_if>(ret);
+}
+}
+} // namespace iss

incl/iss/arch/mnrv32.h

@@ -0,0 +1,250 @@
+/*******************************************************************************
+ * Copyright (C) 2017, 2018 MINRES Technologies GmbH
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ *******************************************************************************/
+
+
+#ifndef _MNRV32_H_
+#define _MNRV32_H_
+
+#include <array>
+#include <iss/arch/traits.h>
+#include <iss/arch_if.h>
+#include <iss/vm_if.h>
+
+namespace iss {
+namespace arch {
+
+struct mnrv32;
+
+template <> struct traits<mnrv32> {
+
+	constexpr static char const* const core_type = "MNRV32";
+    
+  	static constexpr std::array<const char*, 33> reg_names{
+ 		{"x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7", "x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15", "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23", "x24", "x25", "x26", "x27", "x28", "x29", "x30", "x31", "pc"}};
+ 
+  	static constexpr std::array<const char*, 33> reg_aliases{
+ 		{"zero", "ra", "sp", "gp", "tp", "t0", "t1", "t2", "s0", "s1", "a0", "a1", "a2", "a3", "a4", "a5", "a6", "a7", "s2", "s3", "s4", "s5", "s6", "s7", "s8", "s9", "s10", "s11", "t3", "t4", "t5", "t6", "pc"}};
+
+    enum constants {XLEN=32, PCLEN=32, MISA_VAL=0b1000000000101000001000100000101, PGSIZE=0x1000, PGMASK=0xfff};
+
+    constexpr static unsigned FP_REGS_SIZE = 0;
+
+    enum reg_e {
+        X0,
+        X1,
+        X2,
+        X3,
+        X4,
+        X5,
+        X6,
+        X7,
+        X8,
+        X9,
+        X10,
+        X11,
+        X12,
+        X13,
+        X14,
+        X15,
+        X16,
+        X17,
+        X18,
+        X19,
+        X20,
+        X21,
+        X22,
+        X23,
+        X24,
+        X25,
+        X26,
+        X27,
+        X28,
+        X29,
+        X30,
+        X31,
+        PC,
+        NUM_REGS,
+        NEXT_PC=NUM_REGS,
+        TRAP_STATE,
+        PENDING_TRAP,
+        MACHINE_STATE,
+        LAST_BRANCH,
+        ICOUNT,
+        ZERO = X0,
+        RA = X1,
+        SP = X2,
+        GP = X3,
+        TP = X4,
+        T0 = X5,
+        T1 = X6,
+        T2 = X7,
+        S0 = X8,
+        S1 = X9,
+        A0 = X10,
+        A1 = X11,
+        A2 = X12,
+        A3 = X13,
+        A4 = X14,
+        A5 = X15,
+        A6 = X16,
+        A7 = X17,
+        S2 = X18,
+        S3 = X19,
+        S4 = X20,
+        S5 = X21,
+        S6 = X22,
+        S7 = X23,
+        S8 = X24,
+        S9 = X25,
+        S10 = X26,
+        S11 = X27,
+        T3 = X28,
+        T4 = X29,
+        T5 = X30,
+        T6 = X31
+    };
+
+    using reg_t = uint32_t;
+
+    using addr_t = uint32_t;
+
+    using code_word_t = uint32_t; //TODO: check removal
+
+    using virt_addr_t = iss::typed_addr_t<iss::address_type::VIRTUAL>;
+
+    using phys_addr_t = iss::typed_addr_t<iss::address_type::PHYSICAL>;
+
+ 	static constexpr std::array<const uint32_t, 39> reg_bit_widths{
+ 		{32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,64}};
+
+    static constexpr std::array<const uint32_t, 40> reg_byte_offsets{
+    	{0,4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68,72,76,80,84,88,92,96,100,104,108,112,116,120,124,128,132,136,140,144,148,152,160}};
+
+    static const uint64_t addr_mask = (reg_t(1) << (XLEN - 1)) | ((reg_t(1) << (XLEN - 1)) - 1);
+
+    enum sreg_flag_e { FLAGS };
+
+    enum mem_type_e { MEM, CSR, FENCE, RES };
+};
+
+struct mnrv32: public arch_if {
+
+    using virt_addr_t = typename traits<mnrv32>::virt_addr_t;
+    using phys_addr_t = typename traits<mnrv32>::phys_addr_t;
+    using reg_t =  typename traits<mnrv32>::reg_t;
+    using addr_t = typename traits<mnrv32>::addr_t;
+
+    mnrv32();
+    ~mnrv32();
+
+    void reset(uint64_t address=0) override;
+
+    uint8_t* get_regs_base_ptr() override;
+    /// deprecated
+    void get_reg(short idx, std::vector<uint8_t>& value) override {}
+    void set_reg(short idx, const std::vector<uint8_t>& value) override {}
+    /// deprecated
+    bool get_flag(int flag) override {return false;}
+    void set_flag(int, bool value) override {};
+    /// deprecated
+    void update_flags(operations op, uint64_t opr1, uint64_t opr2) override {};
+
+    inline uint64_t get_icount() { return reg.icount; }
+
+    inline bool should_stop() { return interrupt_sim; }
+
+    inline phys_addr_t v2p(const iss::addr_t& addr){
+        if (addr.space != traits<mnrv32>::MEM || addr.type == iss::address_type::PHYSICAL ||
+                addr_mode[static_cast<uint16_t>(addr.access)&0x3]==address_type::PHYSICAL) {
+            return phys_addr_t(addr.access, addr.space, addr.val&traits<mnrv32>::addr_mask);
+        } else
+            return virt2phys(addr);
+    }
+
+    virtual phys_addr_t virt2phys(const iss::addr_t& addr);
+
+    virtual iss::sync_type needed_sync() const { return iss::NO_SYNC; }
+
+    inline uint32_t get_last_branch() { return reg.last_branch; }
+
+protected:
+    struct MNRV32_regs {
+        uint32_t X0 = 0;
+        uint32_t X1 = 0;
+        uint32_t X2 = 0;
+        uint32_t X3 = 0;
+        uint32_t X4 = 0;
+        uint32_t X5 = 0;
+        uint32_t X6 = 0;
+        uint32_t X7 = 0;
+        uint32_t X8 = 0;
+        uint32_t X9 = 0;
+        uint32_t X10 = 0;
+        uint32_t X11 = 0;
+        uint32_t X12 = 0;
+        uint32_t X13 = 0;
+        uint32_t X14 = 0;
+        uint32_t X15 = 0;
+        uint32_t X16 = 0;
+        uint32_t X17 = 0;
+        uint32_t X18 = 0;
+        uint32_t X19 = 0;
+        uint32_t X20 = 0;
+        uint32_t X21 = 0;
+        uint32_t X22 = 0;
+        uint32_t X23 = 0;
+        uint32_t X24 = 0;
+        uint32_t X25 = 0;
+        uint32_t X26 = 0;
+        uint32_t X27 = 0;
+        uint32_t X28 = 0;
+        uint32_t X29 = 0;
+        uint32_t X30 = 0;
+        uint32_t X31 = 0;
+        uint32_t PC = 0;
+        uint32_t NEXT_PC = 0;
+        uint32_t trap_state = 0, pending_trap = 0, machine_state = 0, last_branch = 0;
+        uint64_t icount = 0;
+    } reg;
+
+    std::array<address_type, 4> addr_mode;
+    
+    bool interrupt_sim=false;
+
+	uint32_t get_fcsr(){return 0;}
+	void set_fcsr(uint32_t val){}
+
+};
+
+}
+}            
+#endif /* _MNRV32_H_ */

src/iss/mnrv32.cpp

@@ -0,0 +1,79 @@
+/*******************************************************************************
+ * Copyright (C) 2017, 2018 MINRES Technologies GmbH
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ *******************************************************************************/
+ 
+#include "util/ities.h"
+#include <util/logging.h>
+
+#include <elfio/elfio.hpp>
+#include <iss/arch/mnrv32.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+#include <ihex.h>
+#ifdef __cplusplus
+}
+#endif
+#include <cstdio>
+#include <cstring>
+#include <fstream>
+
+using namespace iss::arch;
+
+constexpr std::array<const char*, 33>    iss::arch::traits<iss::arch::mnrv32>::reg_names;
+constexpr std::array<const char*, 33>    iss::arch::traits<iss::arch::mnrv32>::reg_aliases;
+constexpr std::array<const uint32_t, 39> iss::arch::traits<iss::arch::mnrv32>::reg_bit_widths;
+constexpr std::array<const uint32_t, 40> iss::arch::traits<iss::arch::mnrv32>::reg_byte_offsets;
+
+mnrv32::mnrv32() {
+    reg.icount = 0;
+}
+
+mnrv32::~mnrv32() = default;
+
+void mnrv32::reset(uint64_t address) {
+    for(size_t i=0; i<traits<mnrv32>::NUM_REGS; ++i) set_reg(i, std::vector<uint8_t>(sizeof(traits<mnrv32>::reg_t),0));
+    reg.PC=address;
+    reg.NEXT_PC=reg.PC;
+    reg.trap_state=0;
+    reg.machine_state=0x3;
+    reg.icount=0;
+}
+
+uint8_t *mnrv32::get_regs_base_ptr() {
+	return reinterpret_cast<uint8_t*>(&reg);
+}
+
+mnrv32::phys_addr_t mnrv32::virt2phys(const iss::addr_t &pc) {
+    return phys_addr_t(pc); // change logical address to physical address
+}
+

src/main.cpp

@@ -107,26 +107,26 @@ int main(int argc, char *argv[]) {
         std::unique_ptr<iss::vm_if> vm{nullptr};
         std::unique_ptr<iss::arch_if> cpu{nullptr};
         std::string isa_opt(clim["isa"].as<std::string>());
-        if (isa_opt=="rv64ia") {
+//        if (isa_opt=="rv64ia") {
-            iss::arch::rv64i* lcpu = new iss::arch::riscv_hart_msu_vp<iss::arch::rv64i>();
+//            iss::arch::rv64i* lcpu = new iss::arch::riscv_hart_msu_vp<iss::arch::rv64i>();
-            vm = iss::create(lcpu, clim["gdb-port"].as<unsigned>());
+//            vm = iss::llvm::create(lcpu, clim["gdb-port"].as<unsigned>());
-            cpu.reset(lcpu);
+//            cpu.reset(lcpu);
-        } else if (isa_opt=="rv64gc") {
+//        } else if (isa_opt=="rv64gc") {
-            iss::arch::rv64gc* lcpu = new iss::arch::riscv_hart_msu_vp<iss::arch::rv64gc>();
+//            iss::arch::rv64gc* lcpu = new iss::arch::riscv_hart_msu_vp<iss::arch::rv64gc>();
-            vm = iss::create(lcpu, clim["gdb-port"].as<unsigned>());
+//            vm = iss::llvm::create(lcpu, clim["gdb-port"].as<unsigned>());
-            cpu.reset(lcpu);
+//            cpu.reset(lcpu);
-        } else if (isa_opt=="rv32imac") {
+//        } else if (isa_opt=="rv32imac") {
             iss::arch::rv32imac* lcpu = new iss::arch::riscv_hart_msu_vp<iss::arch::rv32imac>();
-            vm = iss::create(lcpu, clim["gdb-port"].as<unsigned>());
+            vm = iss::llvm::create(lcpu, clim["gdb-port"].as<unsigned>());
             cpu.reset(lcpu);
-        } else if (isa_opt=="rv32gc") {
+//        } else if (isa_opt=="rv32gc") {
-            iss::arch::rv32gc* lcpu = new iss::arch::riscv_hart_msu_vp<iss::arch::rv32gc>();
+//            iss::arch::rv32gc* lcpu = new iss::arch::riscv_hart_msu_vp<iss::arch::rv32gc>();
-            vm = iss::create(lcpu, clim["gdb-port"].as<unsigned>());
+//            vm = iss::llvm::create(lcpu, clim["gdb-port"].as<unsigned>());
-            cpu.reset(lcpu);
+//            cpu.reset(lcpu);
-        } else {
+//        } else {
-            LOG(ERROR) << "Illegal argument value for '--isa': " << clim["isa"].as<std::string>() << std::endl;
+//            LOG(ERROR) << "Illegal argument value for '--isa': " << clim["isa"].as<std::string>() << std::endl;
-            return 127;
+//            return 127;
-        }
+//        }
         if (clim.count("plugin")) {
             for (std::string opt_val : clim["plugin"].as<std::vector<std::string>>()) {
                 std::string plugin_name{opt_val};

src/sysc/core_complex.cpp

@@ -282,7 +282,7 @@ void core_complex::trace(sc_trace_file *trf) const {}
 
 void core_complex::before_end_of_elaboration() {
     cpu = scc::make_unique<core_wrapper>(this);
-    vm = create<arch::rv32imac>(cpu.get(), gdb_server_port.get_value(), dump_ir.get_value());
+    vm = llvm::create<arch::rv32imac>(cpu.get(), gdb_server_port.get_value(), dump_ir.get_value());
 #ifdef WITH_SCV
     vm->setDisassEnabled(enable_disass.get_value() || m_db != nullptr);
 #else

src/vm/llvm/fp_functions.cpp

@@ -44,7 +44,7 @@ extern "C" {
 #include <limits>
 
 namespace iss {
-namespace llvm {
+namespace vm {
 namespace fp_impl {
 
 using namespace std;

src/vm/llvm/vm_rv32gc.cpp

@@ -47,7 +47,7 @@
 #include <iss/debugger/riscv_target_adapter.h>
 
 namespace iss {
-namespace llvm {
+namespace vm {
 namespace fp_impl {
 void add_fp_functions_2_module(llvm::Module *, unsigned, unsigned);
 }
@@ -57,11 +57,11 @@ namespace rv32gc {
 using namespace iss::arch;
 using namespace llvm;
 using namespace iss::debugger;
-using namespace iss::llvm;
+using namespace iss::vm::llvm;
 
 template <typename ARCH> class vm_impl : public vm_base<ARCH> {
 public:
-    using super = typename iss::llvm::vm_base<ARCH>;
+    using super = typename iss::vm::llvm::vm_base<ARCH>;
     using virt_addr_t = typename super::virt_addr_t;
     using phys_addr_t = typename super::phys_addr_t;
     using code_word_t = typename super::code_word_t;
@@ -91,7 +91,7 @@ protected:
 
     void setup_module(Module* m) override {
         super::setup_module(m);
-        iss::llvm::fp_impl::add_fp_functions_2_module(m, traits<ARCH>::FP_REGS_SIZE, traits<ARCH>::XLEN);
+        iss::vm::fp_impl::add_fp_functions_2_module(m, traits<ARCH>::FP_REGS_SIZE, traits<ARCH>::XLEN);
     }
 
     inline Value *gen_choose(Value *cond, Value *trueVal, Value *falseVal, unsigned size) {

src/vm/llvm/vm_rv32imac.cpp

@@ -47,12 +47,12 @@
 #include <iss/debugger/riscv_target_adapter.h>
 
 namespace iss {
-namespace llvm {
+namespace vm {
 namespace fp_impl {
 void add_fp_functions_2_module(llvm::Module *, unsigned, unsigned);
 }
 }
-
+namespace llvm {
 namespace rv32imac {
 using namespace iss::arch;
 using namespace llvm;
@@ -91,7 +91,7 @@ protected:
 
     void setup_module(Module* m) override {
         super::setup_module(m);
-        iss::llvm::fp_impl::add_fp_functions_2_module(m, traits<ARCH>::FP_REGS_SIZE, traits<ARCH>::XLEN);
+        iss::vm::fp_impl::add_fp_functions_2_module(m, traits<ARCH>::FP_REGS_SIZE, traits<ARCH>::XLEN);
     }
 
     inline Value *gen_choose(Value *cond, Value *trueVal, Value *falseVal, unsigned size) {
@@ -4815,5 +4815,5 @@ std::unique_ptr<vm_if> create<arch::rv32imac>(arch::rv32imac *core, unsigned sho
     if (port != 0) debugger::server<debugger::gdb_session>::run_server(ret, port);
     return std::unique_ptr<vm_if>(ret);
 }
-
+}
 } // namespace iss

src/vm/llvm/vm_rv64gc.cpp

@@ -47,7 +47,7 @@
 #include <iss/debugger/riscv_target_adapter.h>
 
 namespace iss {
-namespace llvm {
+namespace vm {
 namespace fp_impl {
 void add_fp_functions_2_module(llvm::Module *, unsigned, unsigned);
 }
@@ -57,11 +57,11 @@ namespace rv64gc {
 using namespace iss::arch;
 using namespace llvm;
 using namespace iss::debugger;
-using namespace iss::llvm;
+using namespace iss::vm::llvm;
 
 template <typename ARCH> class vm_impl : public vm_base<ARCH> {
 public:
-    using super = typename iss::llvm::vm_base<ARCH>;
+    using super = typename iss::vm::llvm::vm_base<ARCH>;
     using virt_addr_t = typename super::virt_addr_t;
     using phys_addr_t = typename super::phys_addr_t;
     using code_word_t = typename super::code_word_t;
@@ -91,7 +91,7 @@ protected:
 
     void setup_module(Module* m) override {
         super::setup_module(m);
-        iss::llvm::fp_impl::add_fp_functions_2_module(m, traits<ARCH>::FP_REGS_SIZE, traits<ARCH>::XLEN);
+        iss::vm::fp_impl::add_fp_functions_2_module(m, traits<ARCH>::FP_REGS_SIZE, traits<ARCH>::XLEN);
     }
 
     inline Value *gen_choose(Value *cond, Value *trueVal, Value *falseVal, unsigned size) {

src/vm/llvm/vm_rv64i.cpp

@@ -47,7 +47,7 @@
 #include <iss/debugger/riscv_target_adapter.h>
 
 namespace iss {
-namespace llvm {
+namespace vm {
 namespace fp_impl {
 void add_fp_functions_2_module(llvm::Module *, unsigned, unsigned);
 }
@@ -57,11 +57,11 @@ namespace rv64i {
 using namespace iss::arch;
 using namespace llvm;
 using namespace iss::debugger;
-using namespace iss::llvm;
+using namespace iss::vm::llvm;
 
 template <typename ARCH> class vm_impl : public vm_base<ARCH> {
 public:
-    using super = typename iss::llvm::vm_base<ARCH>;
+    using super = typename iss::vm::llvm::vm_base<ARCH>;
     using virt_addr_t = typename super::virt_addr_t;
     using phys_addr_t = typename super::phys_addr_t;
     using code_word_t = typename super::code_word_t;
@@ -91,7 +91,7 @@ protected:
 
     void setup_module(Module* m) override {
         super::setup_module(m);
-        iss::llvm::fp_impl::add_fp_functions_2_module(m, traits<ARCH>::FP_REGS_SIZE, traits<ARCH>::XLEN);
+        iss::vm::fp_impl::add_fp_functions_2_module(m, traits<ARCH>::FP_REGS_SIZE, traits<ARCH>::XLEN);
     }
 
     inline Value *gen_choose(Value *cond, Value *trueVal, Value *falseVal, unsigned size) {

src/vm/tcc/vm_mnrv32.cpp

@@ -0,0 +1,610 @@
+/*******************************************************************************
+ * Copyright (C) 2020 MINRES Technologies GmbH
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ *******************************************************************************/
+
+#include <iss/arch/mnrv32.h>
+#include <iss/arch/riscv_hart_msu_vp.h>
+#include <iss/debugger/gdb_session.h>
+#include <iss/debugger/server.h>
+#include <iss/iss.h>
+#include <iss/tcc/vm_base.h>
+#include <util/logging.h>
+#include <sstream>
+
+#ifndef FMT_HEADER_ONLY
+#define FMT_HEADER_ONLY
+#endif
+#include <fmt/format.h>
+
+#include <array>
+#include <iss/debugger/riscv_target_adapter.h>
+
+namespace iss {
+namespace tcc {
+namespace mnrv32 {
+using namespace iss::arch;
+using namespace iss::debugger;
+using namespace iss::vm::tcc;
+
+template <typename ARCH> class vm_impl : public vm_base<ARCH> {
+public:
+    using super = typename iss::vm::tcc::vm_base<ARCH>;
+    using virt_addr_t = typename super::virt_addr_t;
+    using phys_addr_t = typename super::phys_addr_t;
+    using code_word_t = typename super::code_word_t;
+    using addr_t = typename super::addr_t;
+
+    using Value = void;
+    using ConstantInt = void;
+    using Type = void;
+
+    vm_impl();
+
+    vm_impl(ARCH &core, unsigned core_id = 0, unsigned cluster_id = 0);
+
+    void enableDebug(bool enable) { super::sync_exec = super::ALL_SYNC; }
+
+    target_adapter_if *accquire_target_adapter(server_if *srv) override {
+        debugger_if::dbg_enabled = true;
+        if (vm_base<ARCH>::tgt_adapter == nullptr)
+            vm_base<ARCH>::tgt_adapter = new riscv_target_adapter<ARCH>(srv, this->get_arch());
+        return vm_base<ARCH>::tgt_adapter;
+    }
+
+protected:
+    using vm_base<ARCH>::get_reg_ptr;
+
+    using this_class = vm_impl<ARCH>;
+    using compile_ret_t = std::tuple<continuation_e>;
+    using compile_func = compile_ret_t (this_class::*)(virt_addr_t &pc, code_word_t instr, std::ostringstream&);
+
+    inline const char *name(size_t index){return traits<ARCH>::reg_aliases.at(index);}
+
+    template <typename T> inline ConstantInt *size(T type) {
+        return nullptr;
+    }
+
+    void setup_module(Module* m) override {
+        super::setup_module(m);
+    }
+
+    inline Value *gen_choose(Value *cond, Value *trueVal, Value *falseVal, unsigned size) {
+        return super::gen_cond_assign(cond, this->gen_ext(trueVal, size), this->gen_ext(falseVal, size));
+    }
+
+    compile_ret_t gen_single_inst_behavior(virt_addr_t &, unsigned int &, std::ostringstream&) override;
+
+    void gen_leave_behavior(std::ostringstream& os) override;
+
+    void gen_raise_trap(uint16_t trap_id, uint16_t cause);
+
+    void gen_leave_trap(unsigned lvl);
+
+    void gen_wait(unsigned type);
+
+    void gen_trap_behavior(std::ostringstream& os) override;
+
+    void gen_trap_check(std::ostringstream& os){}
+
+    inline Value *gen_reg_load(unsigned i, unsigned level = 0) {
+        return this->builder.CreateLoad(get_reg_ptr(i), false);
+    }
+
+    inline void gen_set_pc(virt_addr_t pc, unsigned reg_num) {
+        Value *next_pc_v = this->builder.CreateSExtOrTrunc(this->gen_const(traits<ARCH>::XLEN, pc.val),
+                                                           this->get_type(traits<ARCH>::XLEN));
+        this->builder.CreateStore(next_pc_v, get_reg_ptr(reg_num), true);
+    }
+
+    // some compile time constants
+    // enum { MASK16 = 0b1111110001100011, MASK32 = 0b11111111111100000111000001111111 };
+    enum { MASK16 = 0b1111111111111111, MASK32 = 0b11111111111100000111000001111111 };
+    enum { EXTR_MASK16 = MASK16 >> 2, EXTR_MASK32 = MASK32 >> 2 };
+    enum { LUT_SIZE = 1 << util::bit_count(EXTR_MASK32), LUT_SIZE_C = 1 << util::bit_count(EXTR_MASK16) };
+
+    std::array<compile_func, LUT_SIZE> lut;
+
+    std::array<compile_func, LUT_SIZE_C> lut_00, lut_01, lut_10;
+    std::array<compile_func, LUT_SIZE> lut_11;
+
+	std::array<compile_func *, 4> qlut;
+
+	std::array<const uint32_t, 4> lutmasks = {{EXTR_MASK16, EXTR_MASK16, EXTR_MASK16, EXTR_MASK32}};
+
+    void expand_bit_mask(int pos, uint32_t mask, uint32_t value, uint32_t valid, uint32_t idx, compile_func lut[],
+                         compile_func f) {
+        if (pos < 0) {
+            lut[idx] = f;
+        } else {
+            auto bitmask = 1UL << pos;
+            if ((mask & bitmask) == 0) {
+                expand_bit_mask(pos - 1, mask, value, valid, idx, lut, f);
+            } else {
+                if ((valid & bitmask) == 0) {
+                    expand_bit_mask(pos - 1, mask, value, valid, (idx << 1), lut, f);
+                    expand_bit_mask(pos - 1, mask, value, valid, (idx << 1) + 1, lut, f);
+                } else {
+                    auto new_val = idx << 1;
+                    if ((value & bitmask) != 0) new_val++;
+                    expand_bit_mask(pos - 1, mask, value, valid, new_val, lut, f);
+                }
+            }
+        }
+    }
+
+    inline uint32_t extract_fields(uint32_t val) { return extract_fields(29, val >> 2, lutmasks[val & 0x3], 0); }
+
+    uint32_t extract_fields(int pos, uint32_t val, uint32_t mask, uint32_t lut_val) {
+        if (pos >= 0) {
+            auto bitmask = 1UL << pos;
+            if ((mask & bitmask) == 0) {
+                lut_val = extract_fields(pos - 1, val, mask, lut_val);
+            } else {
+                auto new_val = lut_val << 1;
+                if ((val & bitmask) != 0) new_val++;
+                lut_val = extract_fields(pos - 1, val, mask, new_val);
+            }
+        }
+        return lut_val;
+    }
+
+private:
+    /****************************************************************************
+     * start opcode definitions
+     ****************************************************************************/
+    struct InstructionDesriptor {
+        size_t length;
+        uint32_t value;
+        uint32_t mask;
+        compile_func op;
+    };
+
+    const std::array<InstructionDesriptor, 52> instr_descr = {{
+         /* entries are: size, valid value, valid mask, function ptr */
+        /* instruction LUI */
+        {32, 0b00000000000000000000000000110111, 0b00000000000000000000000001111111, &this_class::__lui},
+        /* instruction AUIPC */
+        {32, 0b00000000000000000000000000010111, 0b00000000000000000000000001111111, &this_class::__auipc},
+        /* instruction JAL */
+        {32, 0b00000000000000000000000001101111, 0b00000000000000000000000001111111, &this_class::__jal},
+        /* instruction JALR */
+        {32, 0b00000000000000000000000001100111, 0b00000000000000000111000001111111, &this_class::__jalr},
+        /* instruction BEQ */
+        {32, 0b00000000000000000000000001100011, 0b00000000000000000111000001111111, &this_class::__beq},
+        /* instruction BNE */
+        {32, 0b00000000000000000001000001100011, 0b00000000000000000111000001111111, &this_class::__bne},
+        /* instruction BLT */
+        {32, 0b00000000000000000100000001100011, 0b00000000000000000111000001111111, &this_class::__blt},
+        /* instruction BGE */
+        {32, 0b00000000000000000101000001100011, 0b00000000000000000111000001111111, &this_class::__bge},
+        /* instruction BLTU */
+        {32, 0b00000000000000000110000001100011, 0b00000000000000000111000001111111, &this_class::__bltu},
+        /* instruction BGEU */
+        {32, 0b00000000000000000111000001100011, 0b00000000000000000111000001111111, &this_class::__bgeu},
+        /* instruction LB */
+        {32, 0b00000000000000000000000000000011, 0b00000000000000000111000001111111, &this_class::__lb},
+        /* instruction LH */
+        {32, 0b00000000000000000001000000000011, 0b00000000000000000111000001111111, &this_class::__lh},
+        /* instruction LW */
+        {32, 0b00000000000000000010000000000011, 0b00000000000000000111000001111111, &this_class::__lw},
+        /* instruction LBU */
+        {32, 0b00000000000000000100000000000011, 0b00000000000000000111000001111111, &this_class::__lbu},
+        /* instruction LHU */
+        {32, 0b00000000000000000101000000000011, 0b00000000000000000111000001111111, &this_class::__lhu},
+        /* instruction SB */
+        {32, 0b00000000000000000000000000100011, 0b00000000000000000111000001111111, &this_class::__sb},
+        /* instruction SH */
+        {32, 0b00000000000000000001000000100011, 0b00000000000000000111000001111111, &this_class::__sh},
+        /* instruction SW */
+        {32, 0b00000000000000000010000000100011, 0b00000000000000000111000001111111, &this_class::__sw},
+        /* instruction ADDI */
+        {32, 0b00000000000000000000000000010011, 0b00000000000000000111000001111111, &this_class::__addi},
+        /* instruction SLTI */
+        {32, 0b00000000000000000010000000010011, 0b00000000000000000111000001111111, &this_class::__slti},
+        /* instruction SLTIU */
+        {32, 0b00000000000000000011000000010011, 0b00000000000000000111000001111111, &this_class::__sltiu},
+        /* instruction XORI */
+        {32, 0b00000000000000000100000000010011, 0b00000000000000000111000001111111, &this_class::__xori},
+        /* instruction ORI */
+        {32, 0b00000000000000000110000000010011, 0b00000000000000000111000001111111, &this_class::__ori},
+        /* instruction ANDI */
+        {32, 0b00000000000000000111000000010011, 0b00000000000000000111000001111111, &this_class::__andi},
+        /* instruction SLLI */
+        {32, 0b00000000000000000001000000010011, 0b11111110000000000111000001111111, &this_class::__slli},
+        /* instruction SRLI */
+        {32, 0b00000000000000000101000000010011, 0b11111110000000000111000001111111, &this_class::__srli},
+        /* instruction SRAI */
+        {32, 0b01000000000000000101000000010011, 0b11111110000000000111000001111111, &this_class::__srai},
+        /* instruction ADD */
+        {32, 0b00000000000000000000000000110011, 0b11111110000000000111000001111111, &this_class::__add},
+        /* instruction SUB */
+        {32, 0b01000000000000000000000000110011, 0b11111110000000000111000001111111, &this_class::__sub},
+        /* instruction SLL */
+        {32, 0b00000000000000000001000000110011, 0b11111110000000000111000001111111, &this_class::__sll},
+        /* instruction SLT */
+        {32, 0b00000000000000000010000000110011, 0b11111110000000000111000001111111, &this_class::__slt},
+        /* instruction SLTU */
+        {32, 0b00000000000000000011000000110011, 0b11111110000000000111000001111111, &this_class::__sltu},
+        /* instruction XOR */
+        {32, 0b00000000000000000100000000110011, 0b11111110000000000111000001111111, &this_class::__xor},
+        /* instruction SRL */
+        {32, 0b00000000000000000101000000110011, 0b11111110000000000111000001111111, &this_class::__srl},
+        /* instruction SRA */
+        {32, 0b01000000000000000101000000110011, 0b11111110000000000111000001111111, &this_class::__sra},
+        /* instruction OR */
+        {32, 0b00000000000000000110000000110011, 0b11111110000000000111000001111111, &this_class::__or},
+        /* instruction AND */
+        {32, 0b00000000000000000111000000110011, 0b11111110000000000111000001111111, &this_class::__and},
+        /* instruction FENCE */
+        {32, 0b00000000000000000000000000001111, 0b11110000000000000111000001111111, &this_class::__fence},
+        /* instruction FENCE_I */
+        {32, 0b00000000000000000001000000001111, 0b00000000000000000111000001111111, &this_class::__fence_i},
+        /* instruction ECALL */
+        {32, 0b00000000000000000000000001110011, 0b11111111111111111111111111111111, &this_class::__ecall},
+        /* instruction EBREAK */
+        {32, 0b00000000000100000000000001110011, 0b11111111111111111111111111111111, &this_class::__ebreak},
+        /* instruction URET */
+        {32, 0b00000000001000000000000001110011, 0b11111111111111111111111111111111, &this_class::__uret},
+        /* instruction SRET */
+        {32, 0b00010000001000000000000001110011, 0b11111111111111111111111111111111, &this_class::__sret},
+        /* instruction MRET */
+        {32, 0b00110000001000000000000001110011, 0b11111111111111111111111111111111, &this_class::__mret},
+        /* instruction WFI */
+        {32, 0b00010000010100000000000001110011, 0b11111111111111111111111111111111, &this_class::__wfi},
+        /* instruction SFENCE.VMA */
+        {32, 0b00010010000000000000000001110011, 0b11111110000000000111111111111111, &this_class::__sfence_vma},
+        /* instruction CSRRW */
+        {32, 0b00000000000000000001000001110011, 0b00000000000000000111000001111111, &this_class::__csrrw},
+        /* instruction CSRRS */
+        {32, 0b00000000000000000010000001110011, 0b00000000000000000111000001111111, &this_class::__csrrs},
+        /* instruction CSRRC */
+        {32, 0b00000000000000000011000001110011, 0b00000000000000000111000001111111, &this_class::__csrrc},
+        /* instruction CSRRWI */
+        {32, 0b00000000000000000101000001110011, 0b00000000000000000111000001111111, &this_class::__csrrwi},
+        /* instruction CSRRSI */
+        {32, 0b00000000000000000110000001110011, 0b00000000000000000111000001111111, &this_class::__csrrsi},
+        /* instruction CSRRCI */
+        {32, 0b00000000000000000111000001110011, 0b00000000000000000111000001111111, &this_class::__csrrci},
+    }};
+ 
+    /* instruction definitions */
+    /* instruction 0: LUI */
+    compile_ret_t __lui(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 1: AUIPC */
+    compile_ret_t __auipc(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 2: JAL */
+    compile_ret_t __jal(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+        this->gen_sync(PRE_SYNC, 0);
+
+        uint8_t rd = ((bit_sub<7,5>(instr)));
+        uint8_t rs1 = ((bit_sub<15,5>(instr)));
+        int16_t imm = signextend<int16_t,12>((bit_sub<20,12>(instr)));
+        if(this->disass_enabled){
+            /* generate console output when executing the command */
+            auto mnemonic = fmt::format(
+                "{mnemonic:10} {rd}, {rs1}, {imm:#0x}", fmt::arg("mnemonic", "jalr"),
+                fmt::arg("rd", name(rd)), fmt::arg("rs1", name(rs1)), fmt::arg("imm", imm));
+            os<<"print_disass(0x"<<std::hex<<this->core_ptr<<", 0x"<<pc.val<<", \""<<mnemonic<<"\");\n";
+        }
+
+        auto cur_pc_val = pc.val;
+        pc=pc+4;
+    }
+    
+    /* instruction 3: JALR */
+    compile_ret_t __jalr(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 4: BEQ */
+    compile_ret_t __beq(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 5: BNE */
+    compile_ret_t __bne(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 6: BLT */
+    compile_ret_t __blt(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 7: BGE */
+    compile_ret_t __bge(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 8: BLTU */
+    compile_ret_t __bltu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 9: BGEU */
+    compile_ret_t __bgeu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 10: LB */
+    compile_ret_t __lb(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 11: LH */
+    compile_ret_t __lh(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 12: LW */
+    compile_ret_t __lw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 13: LBU */
+    compile_ret_t __lbu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 14: LHU */
+    compile_ret_t __lhu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 15: SB */
+    compile_ret_t __sb(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 16: SH */
+    compile_ret_t __sh(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 17: SW */
+    compile_ret_t __sw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 18: ADDI */
+    compile_ret_t __addi(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 19: SLTI */
+    compile_ret_t __slti(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 20: SLTIU */
+    compile_ret_t __sltiu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 21: XORI */
+    compile_ret_t __xori(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 22: ORI */
+    compile_ret_t __ori(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 23: ANDI */
+    compile_ret_t __andi(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 24: SLLI */
+    compile_ret_t __slli(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 25: SRLI */
+    compile_ret_t __srli(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 26: SRAI */
+    compile_ret_t __srai(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 27: ADD */
+    compile_ret_t __add(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 28: SUB */
+    compile_ret_t __sub(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 29: SLL */
+    compile_ret_t __sll(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 30: SLT */
+    compile_ret_t __slt(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 31: SLTU */
+    compile_ret_t __sltu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 32: XOR */
+    compile_ret_t __xor(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 33: SRL */
+    compile_ret_t __srl(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 34: SRA */
+    compile_ret_t __sra(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 35: OR */
+    compile_ret_t __or(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 36: AND */
+    compile_ret_t __and(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 37: FENCE */
+    compile_ret_t __fence(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 38: FENCE_I */
+    compile_ret_t __fence_i(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 39: ECALL */
+    compile_ret_t __ecall(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 40: EBREAK */
+    compile_ret_t __ebreak(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 41: URET */
+    compile_ret_t __uret(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 42: SRET */
+    compile_ret_t __sret(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 43: MRET */
+    compile_ret_t __mret(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 44: WFI */
+    compile_ret_t __wfi(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 45: SFENCE.VMA */
+    compile_ret_t __sfence_vma(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 46: CSRRW */
+    compile_ret_t __csrrw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 47: CSRRS */
+    compile_ret_t __csrrs(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 48: CSRRC */
+    compile_ret_t __csrrc(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 49: CSRRWI */
+    compile_ret_t __csrrwi(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 50: CSRRSI */
+    compile_ret_t __csrrsi(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 51: CSRRCI */
+    compile_ret_t __csrrci(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /****************************************************************************
+     * end opcode definitions
+     ****************************************************************************/
+    compile_ret_t illegal_intruction(virt_addr_t &pc, code_word_t instr, std::ostringstream& oss) {
+        vm_impl::gen_sync(iss::PRE_SYNC, instr_descr.size());
+        pc = pc + ((instr & 3) == 3 ? 4 : 2);
+        gen_raise_trap(0, 2);     // illegal instruction trap
+        vm_impl::gen_sync(iss::POST_SYNC, instr_descr.size());
+        vm_impl::gen_trap_check(oss);
+        return BRANCH;
+    }
+};
+
+template <typename CODE_WORD> void debug_fn(CODE_WORD insn) {
+    volatile CODE_WORD x = insn;
+    insn = 2 * x;
+}
+
+template <typename ARCH> vm_impl<ARCH>::vm_impl() { this(new ARCH()); }
+
+template <typename ARCH>
+vm_impl<ARCH>::vm_impl(ARCH &core, unsigned core_id, unsigned cluster_id)
+: vm_base<ARCH>(core, core_id, cluster_id) {
+    qlut[0] = lut_00.data();
+    qlut[1] = lut_01.data();
+    qlut[2] = lut_10.data();
+    qlut[3] = lut_11.data();
+    for (auto instr : instr_descr) {
+        auto quantrant = instr.value & 0x3;
+        expand_bit_mask(29, lutmasks[quantrant], instr.value >> 2, instr.mask >> 2, 0, qlut[quantrant], instr.op);
+    }
+}
+
+template <typename ARCH>
+std::tuple<continuation_e>
+vm_impl<ARCH>::gen_single_inst_behavior(virt_addr_t &pc, unsigned int &inst_cnt, std::ostringstream& os) {
+    // we fetch at max 4 byte, alignment is 2
+    enum {TRAP_ID=1<<16};
+    code_word_t insn = 0;
+    const typename traits<ARCH>::addr_t upper_bits = ~traits<ARCH>::PGMASK;
+    phys_addr_t paddr(pc);
+    auto *const data = (uint8_t *)&insn;
+    paddr = this->core.v2p(pc);
+    if ((pc.val & upper_bits) != ((pc.val + 2) & upper_bits)) { // we may cross a page boundary
+        auto res = this->core.read(paddr, 2, data);
+        if (res != iss::Ok) throw trap_access(TRAP_ID, pc.val);
+        if ((insn & 0x3) == 0x3) { // this is a 32bit instruction
+            res = this->core.read(this->core.v2p(pc + 2), 2, data + 2);
+        }
+    } else {
+        auto res = this->core.read(paddr, 4, data);
+        if (res != iss::Ok) throw trap_access(TRAP_ID, pc.val);
+    }
+    if (insn == 0x0000006f || (insn&0xffff)==0xa001) throw simulation_stopped(0); // 'J 0' or 'C.J 0'
+    // curr pc on stack
+    ++inst_cnt;
+    auto lut_val = extract_fields(insn);
+    auto f = qlut[insn & 0x3][lut_val];
+    if (f == nullptr) {
+        f = &this_class::illegal_intruction;
+    }
+    return (this->*f)(pc, insn, os);
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_leave_behavior(std::ostringstream& os) {
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_raise_trap(uint16_t trap_id, uint16_t cause) {
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_leave_trap(unsigned lvl) {
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_wait(unsigned type) {
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_trap_behavior(std::ostringstream& os) {
+}
+
+} // namespace mnrv32
+
+template <>
+std::unique_ptr<vm_if> create<arch::mnrv32>(arch::mnrv32 *core, unsigned short port, bool dump) {
+    auto ret = new mnrv32::vm_impl<arch::mnrv32>(*core, dump);
+    if (port != 0) debugger::server<debugger::gdb_session>::run_server(ret, port);
+    return std::unique_ptr<vm_if>(ret);
+}
+}
+} // namespace iss

src/vm/tcc/vm_rv32imac.cpp

@@ -0,0 +1,913 @@
+/*******************************************************************************
+ * Copyright (C) 2020 MINRES Technologies GmbH
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ *******************************************************************************/
+
+#include <iss/arch/rv32imac.h>
+#include <iss/arch/riscv_hart_msu_vp.h>
+#include <iss/debugger/gdb_session.h>
+#include <iss/debugger/server.h>
+#include <iss/iss.h>
+#include <iss/llvm/vm_base.h>
+#include <util/logging.h>
+
+#ifndef FMT_HEADER_ONLY
+#define FMT_HEADER_ONLY
+#endif
+#include <fmt/format.h>
+
+#include <array>
+#include <iss/debugger/riscv_target_adapter.h>
+
+namespace iss {
+namespace vm {
+namespace fp_impl {
+void add_fp_functions_2_module(llvm::Module *, unsigned, unsigned);
+}
+}
+
+namespace tcc {
+namespace rv32imac {
+using namespace iss::arch;
+using namespace iss::debugger;
+using namespace iss::vm::llvm;
+
+template <typename ARCH> class vm_impl : public vm_base<ARCH> {
+public:
+    using super = typename iss::vm::llvm::vm_base<ARCH>;
+    using virt_addr_t = typename super::virt_addr_t;
+    using phys_addr_t = typename super::phys_addr_t;
+    using code_word_t = typename super::code_word_t;
+    using addr_t = typename super::addr_t;
+
+    vm_impl();
+
+    vm_impl(ARCH &core, unsigned core_id = 0, unsigned cluster_id = 0);
+
+    void enableDebug(bool enable) { super::sync_exec = super::ALL_SYNC; }
+
+    target_adapter_if *accquire_target_adapter(server_if *srv) override {
+        debugger_if::dbg_enabled = true;
+        if (vm_base<ARCH>::tgt_adapter == nullptr)
+            vm_base<ARCH>::tgt_adapter = new riscv_target_adapter<ARCH>(srv, this->get_arch());
+        return vm_base<ARCH>::tgt_adapter;
+    }
+
+protected:
+    using vm_base<ARCH>::get_reg_ptr;
+
+    using this_class = vm_impl<ARCH>;
+    using compile_ret_t = std::tuple<continuation_e>;
+    using compile_func = compile_ret_t (this_class::*)(virt_addr_t &pc, code_word_t instr, std::ostringstream&);
+
+    inline const char *name(size_t index){return traits<ARCH>::reg_aliases.at(index);}
+
+    template <typename T> inline ConstantInt *size(T type) {
+        return ConstantInt::get(getContext(), APInt(32, type->getType()->getScalarSizeInBits()));
+    }
+
+    void setup_module(Module* m) override {
+        super::setup_module(m);
+        iss::vm::fp_impl::add_fp_functions_2_module(m, traits<ARCH>::FP_REGS_SIZE, traits<ARCH>::XLEN);
+    }
+
+    inline Value *gen_choose(Value *cond, Value *trueVal, Value *falseVal, unsigned size) {
+        return super::gen_cond_assign(cond, this->gen_ext(trueVal, size), this->gen_ext(falseVal, size));
+    }
+
+    compile_ret_t gen_single_inst_behavior(virt_addr_t &, unsigned int &, std::ostringstream&) override;
+
+    void gen_leave_behavior(BasicBlock *leave_blk) override;
+
+    void gen_raise_trap(uint16_t trap_id, uint16_t cause);
+
+    void gen_leave_trap(unsigned lvl);
+
+    void gen_wait(unsigned type);
+
+    void gen_trap_behavior(BasicBlock *) override;
+
+    void gen_trap_check(BasicBlock *bb);
+
+    inline Value *gen_reg_load(unsigned i, unsigned level = 0) {
+        return this->builder.CreateLoad(get_reg_ptr(i), false);
+    }
+
+    inline void gen_set_pc(virt_addr_t pc, unsigned reg_num) {
+        Value *next_pc_v = this->builder.CreateSExtOrTrunc(this->gen_const(traits<ARCH>::XLEN, pc.val),
+                                                           this->get_type(traits<ARCH>::XLEN));
+        this->builder.CreateStore(next_pc_v, get_reg_ptr(reg_num), true);
+    }
+
+    // some compile time constants
+    // enum { MASK16 = 0b1111110001100011, MASK32 = 0b11111111111100000111000001111111 };
+    enum { MASK16 = 0b1111111111111111, MASK32 = 0b11111111111100000111000001111111 };
+    enum { EXTR_MASK16 = MASK16 >> 2, EXTR_MASK32 = MASK32 >> 2 };
+    enum { LUT_SIZE = 1 << util::bit_count(EXTR_MASK32), LUT_SIZE_C = 1 << util::bit_count(EXTR_MASK16) };
+
+    std::array<compile_func, LUT_SIZE> lut;
+
+    std::array<compile_func, LUT_SIZE_C> lut_00, lut_01, lut_10;
+    std::array<compile_func, LUT_SIZE> lut_11;
+
+	std::array<compile_func *, 4> qlut;
+
+	std::array<const uint32_t, 4> lutmasks = {{EXTR_MASK16, EXTR_MASK16, EXTR_MASK16, EXTR_MASK32}};
+
+    void expand_bit_mask(int pos, uint32_t mask, uint32_t value, uint32_t valid, uint32_t idx, compile_func lut[],
+                         compile_func f) {
+        if (pos < 0) {
+            lut[idx] = f;
+        } else {
+            auto bitmask = 1UL << pos;
+            if ((mask & bitmask) == 0) {
+                expand_bit_mask(pos - 1, mask, value, valid, idx, lut, f);
+            } else {
+                if ((valid & bitmask) == 0) {
+                    expand_bit_mask(pos - 1, mask, value, valid, (idx << 1), lut, f);
+                    expand_bit_mask(pos - 1, mask, value, valid, (idx << 1) + 1, lut, f);
+                } else {
+                    auto new_val = idx << 1;
+                    if ((value & bitmask) != 0) new_val++;
+                    expand_bit_mask(pos - 1, mask, value, valid, new_val, lut, f);
+                }
+            }
+        }
+    }
+
+    inline uint32_t extract_fields(uint32_t val) { return extract_fields(29, val >> 2, lutmasks[val & 0x3], 0); }
+
+    uint32_t extract_fields(int pos, uint32_t val, uint32_t mask, uint32_t lut_val) {
+        if (pos >= 0) {
+            auto bitmask = 1UL << pos;
+            if ((mask & bitmask) == 0) {
+                lut_val = extract_fields(pos - 1, val, mask, lut_val);
+            } else {
+                auto new_val = lut_val << 1;
+                if ((val & bitmask) != 0) new_val++;
+                lut_val = extract_fields(pos - 1, val, mask, new_val);
+            }
+        }
+        return lut_val;
+    }
+
+private:
+    /****************************************************************************
+     * start opcode definitions
+     ****************************************************************************/
+    struct InstructionDesriptor {
+        size_t length;
+        uint32_t value;
+        uint32_t mask;
+        compile_func op;
+    };
+
+    const std::array<InstructionDesriptor, 99> instr_descr = {{
+         /* entries are: size, valid value, valid mask, function ptr */
+        /* instruction JALR */
+        {32, 0b00000000000000000000000001100111, 0b00000000000000000111000001111111, &this_class::__jalr},
+        /* instruction C.ADDI4SPN */
+        {16, 0b0000000000000000, 0b1110000000000011, &this_class::__c_addi4spn},
+        /* instruction C.LW */
+        {16, 0b0100000000000000, 0b1110000000000011, &this_class::__c_lw},
+        /* instruction C.SW */
+        {16, 0b1100000000000000, 0b1110000000000011, &this_class::__c_sw},
+        /* instruction C.ADDI */
+        {16, 0b0000000000000001, 0b1110000000000011, &this_class::__c_addi},
+        /* instruction C.NOP */
+        {16, 0b0000000000000001, 0b1111111111111111, &this_class::__c_nop},
+        /* instruction C.JAL */
+        {16, 0b0010000000000001, 0b1110000000000011, &this_class::__c_jal},
+        /* instruction C.LI */
+        {16, 0b0100000000000001, 0b1110000000000011, &this_class::__c_li},
+        /* instruction C.LUI */
+        {16, 0b0110000000000001, 0b1110000000000011, &this_class::__c_lui},
+        /* instruction C.ADDI16SP */
+        {16, 0b0110000100000001, 0b1110111110000011, &this_class::__c_addi16sp},
+        /* instruction C.SRLI */
+        {16, 0b1000000000000001, 0b1111110000000011, &this_class::__c_srli},
+        /* instruction C.SRAI */
+        {16, 0b1000010000000001, 0b1111110000000011, &this_class::__c_srai},
+        /* instruction C.ANDI */
+        {16, 0b1000100000000001, 0b1110110000000011, &this_class::__c_andi},
+        /* instruction C.SUB */
+        {16, 0b1000110000000001, 0b1111110001100011, &this_class::__c_sub},
+        /* instruction C.XOR */
+        {16, 0b1000110000100001, 0b1111110001100011, &this_class::__c_xor},
+        /* instruction C.OR */
+        {16, 0b1000110001000001, 0b1111110001100011, &this_class::__c_or},
+        /* instruction C.AND */
+        {16, 0b1000110001100001, 0b1111110001100011, &this_class::__c_and},
+        /* instruction C.J */
+        {16, 0b1010000000000001, 0b1110000000000011, &this_class::__c_j},
+        /* instruction C.BEQZ */
+        {16, 0b1100000000000001, 0b1110000000000011, &this_class::__c_beqz},
+        /* instruction C.BNEZ */
+        {16, 0b1110000000000001, 0b1110000000000011, &this_class::__c_bnez},
+        /* instruction C.SLLI */
+        {16, 0b0000000000000010, 0b1111000000000011, &this_class::__c_slli},
+        /* instruction C.LWSP */
+        {16, 0b0100000000000010, 0b1110000000000011, &this_class::__c_lwsp},
+        /* instruction C.MV */
+        {16, 0b1000000000000010, 0b1111000000000011, &this_class::__c_mv},
+        /* instruction C.JR */
+        {16, 0b1000000000000010, 0b1111000001111111, &this_class::__c_jr},
+        /* instruction C.ADD */
+        {16, 0b1001000000000010, 0b1111000000000011, &this_class::__c_add},
+        /* instruction C.JALR */
+        {16, 0b1001000000000010, 0b1111000001111111, &this_class::__c_jalr},
+        /* instruction C.EBREAK */
+        {16, 0b1001000000000010, 0b1111111111111111, &this_class::__c_ebreak},
+        /* instruction C.SWSP */
+        {16, 0b1100000000000010, 0b1110000000000011, &this_class::__c_swsp},
+        /* instruction DII */
+        {16, 0b0000000000000000, 0b1111111111111111, &this_class::__dii},
+        /* instruction LR.W */
+        {32, 0b00010000000000000010000000101111, 0b11111001111100000111000001111111, &this_class::__lr_w},
+        /* instruction SC.W */
+        {32, 0b00011000000000000010000000101111, 0b11111000000000000111000001111111, &this_class::__sc_w},
+        /* instruction AMOSWAP.W */
+        {32, 0b00001000000000000010000000101111, 0b11111000000000000111000001111111, &this_class::__amoswap_w},
+        /* instruction AMOADD.W */
+        {32, 0b00000000000000000010000000101111, 0b11111000000000000111000001111111, &this_class::__amoadd_w},
+        /* instruction AMOXOR.W */
+        {32, 0b00100000000000000010000000101111, 0b11111000000000000111000001111111, &this_class::__amoxor_w},
+        /* instruction AMOAND.W */
+        {32, 0b01100000000000000010000000101111, 0b11111000000000000111000001111111, &this_class::__amoand_w},
+        /* instruction AMOOR.W */
+        {32, 0b01000000000000000010000000101111, 0b11111000000000000111000001111111, &this_class::__amoor_w},
+        /* instruction AMOMIN.W */
+        {32, 0b10000000000000000010000000101111, 0b11111000000000000111000001111111, &this_class::__amomin_w},
+        /* instruction AMOMAX.W */
+        {32, 0b10100000000000000010000000101111, 0b11111000000000000111000001111111, &this_class::__amomax_w},
+        /* instruction AMOMINU.W */
+        {32, 0b11000000000000000010000000101111, 0b11111000000000000111000001111111, &this_class::__amominu_w},
+        /* instruction AMOMAXU.W */
+        {32, 0b11100000000000000010000000101111, 0b11111000000000000111000001111111, &this_class::__amomaxu_w},
+        /* instruction MUL */
+        {32, 0b00000010000000000000000000110011, 0b11111110000000000111000001111111, &this_class::__mul},
+        /* instruction MULH */
+        {32, 0b00000010000000000001000000110011, 0b11111110000000000111000001111111, &this_class::__mulh},
+        /* instruction MULHSU */
+        {32, 0b00000010000000000010000000110011, 0b11111110000000000111000001111111, &this_class::__mulhsu},
+        /* instruction MULHU */
+        {32, 0b00000010000000000011000000110011, 0b11111110000000000111000001111111, &this_class::__mulhu},
+        /* instruction DIV */
+        {32, 0b00000010000000000100000000110011, 0b11111110000000000111000001111111, &this_class::__div},
+        /* instruction DIVU */
+        {32, 0b00000010000000000101000000110011, 0b11111110000000000111000001111111, &this_class::__divu},
+        /* instruction REM */
+        {32, 0b00000010000000000110000000110011, 0b11111110000000000111000001111111, &this_class::__rem},
+        /* instruction REMU */
+        {32, 0b00000010000000000111000000110011, 0b11111110000000000111000001111111, &this_class::__remu},
+        /* instruction LUI */
+        {32, 0b00000000000000000000000000110111, 0b00000000000000000000000001111111, &this_class::__lui},
+        /* instruction AUIPC */
+        {32, 0b00000000000000000000000000010111, 0b00000000000000000000000001111111, &this_class::__auipc},
+        /* instruction JAL */
+        {32, 0b00000000000000000000000001101111, 0b00000000000000000000000001111111, &this_class::__jal},
+        /* instruction BEQ */
+        {32, 0b00000000000000000000000001100011, 0b00000000000000000111000001111111, &this_class::__beq},
+        /* instruction BNE */
+        {32, 0b00000000000000000001000001100011, 0b00000000000000000111000001111111, &this_class::__bne},
+        /* instruction BLT */
+        {32, 0b00000000000000000100000001100011, 0b00000000000000000111000001111111, &this_class::__blt},
+        /* instruction BGE */
+        {32, 0b00000000000000000101000001100011, 0b00000000000000000111000001111111, &this_class::__bge},
+        /* instruction BLTU */
+        {32, 0b00000000000000000110000001100011, 0b00000000000000000111000001111111, &this_class::__bltu},
+        /* instruction BGEU */
+        {32, 0b00000000000000000111000001100011, 0b00000000000000000111000001111111, &this_class::__bgeu},
+        /* instruction LB */
+        {32, 0b00000000000000000000000000000011, 0b00000000000000000111000001111111, &this_class::__lb},
+        /* instruction LH */
+        {32, 0b00000000000000000001000000000011, 0b00000000000000000111000001111111, &this_class::__lh},
+        /* instruction LW */
+        {32, 0b00000000000000000010000000000011, 0b00000000000000000111000001111111, &this_class::__lw},
+        /* instruction LBU */
+        {32, 0b00000000000000000100000000000011, 0b00000000000000000111000001111111, &this_class::__lbu},
+        /* instruction LHU */
+        {32, 0b00000000000000000101000000000011, 0b00000000000000000111000001111111, &this_class::__lhu},
+        /* instruction SB */
+        {32, 0b00000000000000000000000000100011, 0b00000000000000000111000001111111, &this_class::__sb},
+        /* instruction SH */
+        {32, 0b00000000000000000001000000100011, 0b00000000000000000111000001111111, &this_class::__sh},
+        /* instruction SW */
+        {32, 0b00000000000000000010000000100011, 0b00000000000000000111000001111111, &this_class::__sw},
+        /* instruction ADDI */
+        {32, 0b00000000000000000000000000010011, 0b00000000000000000111000001111111, &this_class::__addi},
+        /* instruction SLTI */
+        {32, 0b00000000000000000010000000010011, 0b00000000000000000111000001111111, &this_class::__slti},
+        /* instruction SLTIU */
+        {32, 0b00000000000000000011000000010011, 0b00000000000000000111000001111111, &this_class::__sltiu},
+        /* instruction XORI */
+        {32, 0b00000000000000000100000000010011, 0b00000000000000000111000001111111, &this_class::__xori},
+        /* instruction ORI */
+        {32, 0b00000000000000000110000000010011, 0b00000000000000000111000001111111, &this_class::__ori},
+        /* instruction ANDI */
+        {32, 0b00000000000000000111000000010011, 0b00000000000000000111000001111111, &this_class::__andi},
+        /* instruction SLLI */
+        {32, 0b00000000000000000001000000010011, 0b11111110000000000111000001111111, &this_class::__slli},
+        /* instruction SRLI */
+        {32, 0b00000000000000000101000000010011, 0b11111110000000000111000001111111, &this_class::__srli},
+        /* instruction SRAI */
+        {32, 0b01000000000000000101000000010011, 0b11111110000000000111000001111111, &this_class::__srai},
+        /* instruction ADD */
+        {32, 0b00000000000000000000000000110011, 0b11111110000000000111000001111111, &this_class::__add},
+        /* instruction SUB */
+        {32, 0b01000000000000000000000000110011, 0b11111110000000000111000001111111, &this_class::__sub},
+        /* instruction SLL */
+        {32, 0b00000000000000000001000000110011, 0b11111110000000000111000001111111, &this_class::__sll},
+        /* instruction SLT */
+        {32, 0b00000000000000000010000000110011, 0b11111110000000000111000001111111, &this_class::__slt},
+        /* instruction SLTU */
+        {32, 0b00000000000000000011000000110011, 0b11111110000000000111000001111111, &this_class::__sltu},
+        /* instruction XOR */
+        {32, 0b00000000000000000100000000110011, 0b11111110000000000111000001111111, &this_class::__xor},
+        /* instruction SRL */
+        {32, 0b00000000000000000101000000110011, 0b11111110000000000111000001111111, &this_class::__srl},
+        /* instruction SRA */
+        {32, 0b01000000000000000101000000110011, 0b11111110000000000111000001111111, &this_class::__sra},
+        /* instruction OR */
+        {32, 0b00000000000000000110000000110011, 0b11111110000000000111000001111111, &this_class::__or},
+        /* instruction AND */
+        {32, 0b00000000000000000111000000110011, 0b11111110000000000111000001111111, &this_class::__and},
+        /* instruction FENCE */
+        {32, 0b00000000000000000000000000001111, 0b11110000000000000111000001111111, &this_class::__fence},
+        /* instruction FENCE_I */
+        {32, 0b00000000000000000001000000001111, 0b00000000000000000111000001111111, &this_class::__fence_i},
+        /* instruction ECALL */
+        {32, 0b00000000000000000000000001110011, 0b11111111111111111111111111111111, &this_class::__ecall},
+        /* instruction EBREAK */
+        {32, 0b00000000000100000000000001110011, 0b11111111111111111111111111111111, &this_class::__ebreak},
+        /* instruction URET */
+        {32, 0b00000000001000000000000001110011, 0b11111111111111111111111111111111, &this_class::__uret},
+        /* instruction SRET */
+        {32, 0b00010000001000000000000001110011, 0b11111111111111111111111111111111, &this_class::__sret},
+        /* instruction MRET */
+        {32, 0b00110000001000000000000001110011, 0b11111111111111111111111111111111, &this_class::__mret},
+        /* instruction WFI */
+        {32, 0b00010000010100000000000001110011, 0b11111111111111111111111111111111, &this_class::__wfi},
+        /* instruction SFENCE.VMA */
+        {32, 0b00010010000000000000000001110011, 0b11111110000000000111111111111111, &this_class::__sfence_vma},
+        /* instruction CSRRW */
+        {32, 0b00000000000000000001000001110011, 0b00000000000000000111000001111111, &this_class::__csrrw},
+        /* instruction CSRRS */
+        {32, 0b00000000000000000010000001110011, 0b00000000000000000111000001111111, &this_class::__csrrs},
+        /* instruction CSRRC */
+        {32, 0b00000000000000000011000001110011, 0b00000000000000000111000001111111, &this_class::__csrrc},
+        /* instruction CSRRWI */
+        {32, 0b00000000000000000101000001110011, 0b00000000000000000111000001111111, &this_class::__csrrwi},
+        /* instruction CSRRSI */
+        {32, 0b00000000000000000110000001110011, 0b00000000000000000111000001111111, &this_class::__csrrsi},
+        /* instruction CSRRCI */
+        {32, 0b00000000000000000111000001110011, 0b00000000000000000111000001111111, &this_class::__csrrci},
+    }};
+ 
+    /* instruction definitions */
+    /* instruction 0: JALR */
+    compile_ret_t __jalr(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 1: C.ADDI4SPN */
+    compile_ret_t __c_addi4spn(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 2: C.LW */
+    compile_ret_t __c_lw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 3: C.SW */
+    compile_ret_t __c_sw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 4: C.ADDI */
+    compile_ret_t __c_addi(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 5: C.NOP */
+    compile_ret_t __c_nop(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 6: C.JAL */
+    compile_ret_t __c_jal(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 7: C.LI */
+    compile_ret_t __c_li(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 8: C.LUI */
+    compile_ret_t __c_lui(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 9: C.ADDI16SP */
+    compile_ret_t __c_addi16sp(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 10: C.SRLI */
+    compile_ret_t __c_srli(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 11: C.SRAI */
+    compile_ret_t __c_srai(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 12: C.ANDI */
+    compile_ret_t __c_andi(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 13: C.SUB */
+    compile_ret_t __c_sub(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 14: C.XOR */
+    compile_ret_t __c_xor(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 15: C.OR */
+    compile_ret_t __c_or(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 16: C.AND */
+    compile_ret_t __c_and(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 17: C.J */
+    compile_ret_t __c_j(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 18: C.BEQZ */
+    compile_ret_t __c_beqz(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 19: C.BNEZ */
+    compile_ret_t __c_bnez(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 20: C.SLLI */
+    compile_ret_t __c_slli(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 21: C.LWSP */
+    compile_ret_t __c_lwsp(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 22: C.MV */
+    compile_ret_t __c_mv(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 23: C.JR */
+    compile_ret_t __c_jr(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 24: C.ADD */
+    compile_ret_t __c_add(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 25: C.JALR */
+    compile_ret_t __c_jalr(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 26: C.EBREAK */
+    compile_ret_t __c_ebreak(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 27: C.SWSP */
+    compile_ret_t __c_swsp(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 28: DII */
+    compile_ret_t __dii(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 29: LR.W */
+    compile_ret_t __lr_w(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 30: SC.W */
+    compile_ret_t __sc_w(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 31: AMOSWAP.W */
+    compile_ret_t __amoswap_w(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 32: AMOADD.W */
+    compile_ret_t __amoadd_w(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 33: AMOXOR.W */
+    compile_ret_t __amoxor_w(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 34: AMOAND.W */
+    compile_ret_t __amoand_w(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 35: AMOOR.W */
+    compile_ret_t __amoor_w(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 36: AMOMIN.W */
+    compile_ret_t __amomin_w(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 37: AMOMAX.W */
+    compile_ret_t __amomax_w(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 38: AMOMINU.W */
+    compile_ret_t __amominu_w(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 39: AMOMAXU.W */
+    compile_ret_t __amomaxu_w(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 40: MUL */
+    compile_ret_t __mul(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 41: MULH */
+    compile_ret_t __mulh(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 42: MULHSU */
+    compile_ret_t __mulhsu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 43: MULHU */
+    compile_ret_t __mulhu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 44: DIV */
+    compile_ret_t __div(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 45: DIVU */
+    compile_ret_t __divu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 46: REM */
+    compile_ret_t __rem(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 47: REMU */
+    compile_ret_t __remu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 48: LUI */
+    compile_ret_t __lui(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 49: AUIPC */
+    compile_ret_t __auipc(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 50: JAL */
+    compile_ret_t __jal(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 51: BEQ */
+    compile_ret_t __beq(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 52: BNE */
+    compile_ret_t __bne(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 53: BLT */
+    compile_ret_t __blt(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 54: BGE */
+    compile_ret_t __bge(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 55: BLTU */
+    compile_ret_t __bltu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 56: BGEU */
+    compile_ret_t __bgeu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 57: LB */
+    compile_ret_t __lb(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 58: LH */
+    compile_ret_t __lh(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 59: LW */
+    compile_ret_t __lw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 60: LBU */
+    compile_ret_t __lbu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 61: LHU */
+    compile_ret_t __lhu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 62: SB */
+    compile_ret_t __sb(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 63: SH */
+    compile_ret_t __sh(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 64: SW */
+    compile_ret_t __sw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 65: ADDI */
+    compile_ret_t __addi(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 66: SLTI */
+    compile_ret_t __slti(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 67: SLTIU */
+    compile_ret_t __sltiu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 68: XORI */
+    compile_ret_t __xori(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 69: ORI */
+    compile_ret_t __ori(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 70: ANDI */
+    compile_ret_t __andi(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 71: SLLI */
+    compile_ret_t __slli(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 72: SRLI */
+    compile_ret_t __srli(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 73: SRAI */
+    compile_ret_t __srai(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 74: ADD */
+    compile_ret_t __add(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 75: SUB */
+    compile_ret_t __sub(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 76: SLL */
+    compile_ret_t __sll(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 77: SLT */
+    compile_ret_t __slt(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 78: SLTU */
+    compile_ret_t __sltu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 79: XOR */
+    compile_ret_t __xor(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 80: SRL */
+    compile_ret_t __srl(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 81: SRA */
+    compile_ret_t __sra(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 82: OR */
+    compile_ret_t __or(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 83: AND */
+    compile_ret_t __and(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 84: FENCE */
+    compile_ret_t __fence(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 85: FENCE_I */
+    compile_ret_t __fence_i(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 86: ECALL */
+    compile_ret_t __ecall(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 87: EBREAK */
+    compile_ret_t __ebreak(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 88: URET */
+    compile_ret_t __uret(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 89: SRET */
+    compile_ret_t __sret(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 90: MRET */
+    compile_ret_t __mret(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 91: WFI */
+    compile_ret_t __wfi(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 92: SFENCE.VMA */
+    compile_ret_t __sfence_vma(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 93: CSRRW */
+    compile_ret_t __csrrw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 94: CSRRS */
+    compile_ret_t __csrrs(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 95: CSRRC */
+    compile_ret_t __csrrc(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 96: CSRRWI */
+    compile_ret_t __csrrwi(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 97: CSRRSI */
+    compile_ret_t __csrrsi(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 98: CSRRCI */
+    compile_ret_t __csrrci(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /****************************************************************************
+     * end opcode definitions
+     ****************************************************************************/
+    compile_ret_t illegal_intruction(virt_addr_t &pc, code_word_t instr, std::stringstream& os) {
+		this->gen_sync(iss::PRE_SYNC, instr_descr.size());
+        this->builder.CreateStore(this->builder.CreateLoad(get_reg_ptr(traits<ARCH>::NEXT_PC), true),
+                                   get_reg_ptr(traits<ARCH>::PC), true);
+        this->builder.CreateStore(
+            this->builder.CreateAdd(this->builder.CreateLoad(get_reg_ptr(traits<ARCH>::ICOUNT), true),
+                                     this->gen_const(64U, 1)),
+            get_reg_ptr(traits<ARCH>::ICOUNT), true);
+        pc = pc + ((instr & 3) == 3 ? 4 : 2);
+        this->gen_raise_trap(0, 2);     // illegal instruction trap
+		this->gen_sync(iss::POST_SYNC, instr_descr.size());
+        this->gen_trap_check(this->leave_blk);
+        return BRANCH;
+    }
+};
+
+template <typename CODE_WORD> void debug_fn(CODE_WORD insn) {
+    volatile CODE_WORD x = insn;
+    insn = 2 * x;
+}
+
+template <typename ARCH> vm_impl<ARCH>::vm_impl() { this(new ARCH()); }
+
+template <typename ARCH>
+vm_impl<ARCH>::vm_impl(ARCH &core, unsigned core_id, unsigned cluster_id)
+: vm_base<ARCH>(core, core_id, cluster_id) {
+    qlut[0] = lut_00.data();
+    qlut[1] = lut_01.data();
+    qlut[2] = lut_10.data();
+    qlut[3] = lut_11.data();
+    for (auto instr : instr_descr) {
+        auto quantrant = instr.value & 0x3;
+        expand_bit_mask(29, lutmasks[quantrant], instr.value >> 2, instr.mask >> 2, 0, qlut[quantrant], instr.op);
+    }
+}
+
+template <typename ARCH>
+std::tuple<continuation_e>
+vm_impl<ARCH>::gen_single_inst_behavior(virt_addr_t &pc, unsigned int &inst_cnt, std::ostringstrem& os) {
+    // we fetch at max 4 byte, alignment is 2
+    enum {TRAP_ID=1<<16};
+    code_word_t insn = 0;
+    const typename traits<ARCH>::addr_t upper_bits = ~traits<ARCH>::PGMASK;
+    phys_addr_t paddr(pc);
+    auto *const data = (uint8_t *)&insn;
+    paddr = this->core.v2p(pc);
+    if ((pc.val & upper_bits) != ((pc.val + 2) & upper_bits)) { // we may cross a page boundary
+        auto res = this->core.read(paddr, 2, data);
+        if (res != iss::Ok) throw trap_access(TRAP_ID, pc.val);
+        if ((insn & 0x3) == 0x3) { // this is a 32bit instruction
+            res = this->core.read(this->core.v2p(pc + 2), 2, data + 2);
+        }
+    } else {
+        auto res = this->core.read(paddr, 4, data);
+        if (res != iss::Ok) throw trap_access(TRAP_ID, pc.val);
+    }
+    if (insn == 0x0000006f || (insn&0xffff)==0xa001) throw simulation_stopped(0); // 'J 0' or 'C.J 0'
+    // curr pc on stack
+    ++inst_cnt;
+    auto lut_val = extract_fields(insn);
+    auto f = qlut[insn & 0x3][lut_val];
+    if (f == nullptr) {
+        f = &this_class::illegal_intruction;
+    }
+    return (this->*f)(pc, insn, this_block);
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_leave_behavior(BasicBlock *leave_blk) {
+    this->builder.SetInsertPoint(leave_blk);
+    this->builder.CreateRet(this->builder.CreateLoad(get_reg_ptr(arch::traits<ARCH>::NEXT_PC), false));
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_raise_trap(uint16_t trap_id, uint16_t cause) {
+    auto *TRAP_val = this->gen_const(32, 0x80 << 24 | (cause << 16) | trap_id);
+    this->builder.CreateStore(TRAP_val, get_reg_ptr(traits<ARCH>::TRAP_STATE), true);
+    this->builder.CreateStore(this->gen_const(32U, std::numeric_limits<uint32_t>::max()), get_reg_ptr(traits<ARCH>::LAST_BRANCH), false);
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_leave_trap(unsigned lvl) {
+    std::vector<Value *> args{ this->core_ptr, ConstantInt::get(getContext(), APInt(64, lvl)) };
+    this->builder.CreateCall(this->mod->getFunction("leave_trap"), args);
+    auto *PC_val = this->gen_read_mem(traits<ARCH>::CSR, (lvl << 8) + 0x41, traits<ARCH>::XLEN / 8);
+    this->builder.CreateStore(PC_val, get_reg_ptr(traits<ARCH>::NEXT_PC), false);
+    this->builder.CreateStore(this->gen_const(32U, std::numeric_limits<uint32_t>::max()), get_reg_ptr(traits<ARCH>::LAST_BRANCH), false);
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_wait(unsigned type) {
+    std::vector<Value *> args{ this->core_ptr, ConstantInt::get(getContext(), APInt(64, type)) };
+    this->builder.CreateCall(this->mod->getFunction("wait"), args);
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_trap_behavior(BasicBlock *trap_blk) {
+    this->builder.SetInsertPoint(trap_blk);
+    auto *trap_state_val = this->builder.CreateLoad(get_reg_ptr(traits<ARCH>::TRAP_STATE), true);
+    this->builder.CreateStore(this->gen_const(32U, std::numeric_limits<uint32_t>::max()),
+                              get_reg_ptr(traits<ARCH>::LAST_BRANCH), false);
+    std::vector<Value *> args{this->core_ptr, this->adj_to64(trap_state_val),
+                              this->adj_to64(this->builder.CreateLoad(get_reg_ptr(traits<ARCH>::PC), false))};
+    this->builder.CreateCall(this->mod->getFunction("enter_trap"), args);
+    auto *trap_addr_val = this->builder.CreateLoad(get_reg_ptr(traits<ARCH>::NEXT_PC), false);
+    this->builder.CreateRet(trap_addr_val);
+}
+
+template <typename ARCH> inline void vm_impl<ARCH>::gen_trap_check(BasicBlock *bb) {
+    auto *v = this->builder.CreateLoad(get_reg_ptr(arch::traits<ARCH>::TRAP_STATE), true);
+    this->gen_cond_branch(this->builder.CreateICmp(
+                              ICmpInst::ICMP_EQ, v,
+                              ConstantInt::get(getContext(), APInt(v->getType()->getIntegerBitWidth(), 0))),
+                          bb, this->trap_blk, 1);
+}
+} // namespace rv32imac
+
+template <>
+std::unique_ptr<vm_if> create<arch::rv32imac>(arch::rv32imac *core, unsigned short port, bool dump) {
+    auto ret = new rv32imac::vm_impl<arch::rv32imac>(*core, dump);
+    if (port != 0) debugger::server<debugger::gdb_session>::run_server(ret, port);
+    return std::unique_ptr<vm_if>(ret);
+}
+}
+} // namespace iss

src/vm/tcc/vm_rv64i.cpp

@@ -0,0 +1,703 @@
+/*******************************************************************************
+ * Copyright (C) 2020 MINRES Technologies GmbH
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ *******************************************************************************/
+
+#include <iss/arch/rv64i.h>
+#include <iss/arch/riscv_hart_msu_vp.h>
+#include <iss/debugger/gdb_session.h>
+#include <iss/debugger/server.h>
+#include <iss/iss.h>
+#include <iss/llvm/vm_base.h>
+#include <util/logging.h>
+
+#ifndef FMT_HEADER_ONLY
+#define FMT_HEADER_ONLY
+#endif
+#include <fmt/format.h>
+
+#include <array>
+#include <iss/debugger/riscv_target_adapter.h>
+
+namespace iss {
+namespace vm {
+namespace fp_impl {
+void add_fp_functions_2_module(llvm::Module *, unsigned, unsigned);
+}
+}
+
+namespace tcc {
+namespace rv64i {
+using namespace iss::arch;
+using namespace iss::debugger;
+using namespace iss::vm::llvm;
+
+template <typename ARCH> class vm_impl : public vm_base<ARCH> {
+public:
+    using super = typename iss::vm::llvm::vm_base<ARCH>;
+    using virt_addr_t = typename super::virt_addr_t;
+    using phys_addr_t = typename super::phys_addr_t;
+    using code_word_t = typename super::code_word_t;
+    using addr_t = typename super::addr_t;
+
+    vm_impl();
+
+    vm_impl(ARCH &core, unsigned core_id = 0, unsigned cluster_id = 0);
+
+    void enableDebug(bool enable) { super::sync_exec = super::ALL_SYNC; }
+
+    target_adapter_if *accquire_target_adapter(server_if *srv) override {
+        debugger_if::dbg_enabled = true;
+        if (vm_base<ARCH>::tgt_adapter == nullptr)
+            vm_base<ARCH>::tgt_adapter = new riscv_target_adapter<ARCH>(srv, this->get_arch());
+        return vm_base<ARCH>::tgt_adapter;
+    }
+
+protected:
+    using vm_base<ARCH>::get_reg_ptr;
+
+    using this_class = vm_impl<ARCH>;
+    using compile_ret_t = std::tuple<continuation_e>;
+    using compile_func = compile_ret_t (this_class::*)(virt_addr_t &pc, code_word_t instr, std::ostringstream&);
+
+    inline const char *name(size_t index){return traits<ARCH>::reg_aliases.at(index);}
+
+    template <typename T> inline ConstantInt *size(T type) {
+        return ConstantInt::get(getContext(), APInt(32, type->getType()->getScalarSizeInBits()));
+    }
+
+    void setup_module(Module* m) override {
+        super::setup_module(m);
+        iss::vm::fp_impl::add_fp_functions_2_module(m, traits<ARCH>::FP_REGS_SIZE, traits<ARCH>::XLEN);
+    }
+
+    inline Value *gen_choose(Value *cond, Value *trueVal, Value *falseVal, unsigned size) {
+        return super::gen_cond_assign(cond, this->gen_ext(trueVal, size), this->gen_ext(falseVal, size));
+    }
+
+    compile_ret_t gen_single_inst_behavior(virt_addr_t &, unsigned int &, std::ostringstream&) override;
+
+    void gen_leave_behavior(BasicBlock *leave_blk) override;
+
+    void gen_raise_trap(uint16_t trap_id, uint16_t cause);
+
+    void gen_leave_trap(unsigned lvl);
+
+    void gen_wait(unsigned type);
+
+    void gen_trap_behavior(BasicBlock *) override;
+
+    void gen_trap_check(BasicBlock *bb);
+
+    inline Value *gen_reg_load(unsigned i, unsigned level = 0) {
+        return this->builder.CreateLoad(get_reg_ptr(i), false);
+    }
+
+    inline void gen_set_pc(virt_addr_t pc, unsigned reg_num) {
+        Value *next_pc_v = this->builder.CreateSExtOrTrunc(this->gen_const(traits<ARCH>::XLEN, pc.val),
+                                                           this->get_type(traits<ARCH>::XLEN));
+        this->builder.CreateStore(next_pc_v, get_reg_ptr(reg_num), true);
+    }
+
+    // some compile time constants
+    // enum { MASK16 = 0b1111110001100011, MASK32 = 0b11111111111100000111000001111111 };
+    enum { MASK16 = 0b1111111111111111, MASK32 = 0b11111111111100000111000001111111 };
+    enum { EXTR_MASK16 = MASK16 >> 2, EXTR_MASK32 = MASK32 >> 2 };
+    enum { LUT_SIZE = 1 << util::bit_count(EXTR_MASK32), LUT_SIZE_C = 1 << util::bit_count(EXTR_MASK16) };
+
+    std::array<compile_func, LUT_SIZE> lut;
+
+    std::array<compile_func, LUT_SIZE_C> lut_00, lut_01, lut_10;
+    std::array<compile_func, LUT_SIZE> lut_11;
+
+	std::array<compile_func *, 4> qlut;
+
+	std::array<const uint32_t, 4> lutmasks = {{EXTR_MASK16, EXTR_MASK16, EXTR_MASK16, EXTR_MASK32}};
+
+    void expand_bit_mask(int pos, uint32_t mask, uint32_t value, uint32_t valid, uint32_t idx, compile_func lut[],
+                         compile_func f) {
+        if (pos < 0) {
+            lut[idx] = f;
+        } else {
+            auto bitmask = 1UL << pos;
+            if ((mask & bitmask) == 0) {
+                expand_bit_mask(pos - 1, mask, value, valid, idx, lut, f);
+            } else {
+                if ((valid & bitmask) == 0) {
+                    expand_bit_mask(pos - 1, mask, value, valid, (idx << 1), lut, f);
+                    expand_bit_mask(pos - 1, mask, value, valid, (idx << 1) + 1, lut, f);
+                } else {
+                    auto new_val = idx << 1;
+                    if ((value & bitmask) != 0) new_val++;
+                    expand_bit_mask(pos - 1, mask, value, valid, new_val, lut, f);
+                }
+            }
+        }
+    }
+
+    inline uint32_t extract_fields(uint32_t val) { return extract_fields(29, val >> 2, lutmasks[val & 0x3], 0); }
+
+    uint32_t extract_fields(int pos, uint32_t val, uint32_t mask, uint32_t lut_val) {
+        if (pos >= 0) {
+            auto bitmask = 1UL << pos;
+            if ((mask & bitmask) == 0) {
+                lut_val = extract_fields(pos - 1, val, mask, lut_val);
+            } else {
+                auto new_val = lut_val << 1;
+                if ((val & bitmask) != 0) new_val++;
+                lut_val = extract_fields(pos - 1, val, mask, new_val);
+            }
+        }
+        return lut_val;
+    }
+
+private:
+    /****************************************************************************
+     * start opcode definitions
+     ****************************************************************************/
+    struct InstructionDesriptor {
+        size_t length;
+        uint32_t value;
+        uint32_t mask;
+        compile_func op;
+    };
+
+    const std::array<InstructionDesriptor, 64> instr_descr = {{
+         /* entries are: size, valid value, valid mask, function ptr */
+        /* instruction LUI */
+        {32, 0b00000000000000000000000000110111, 0b00000000000000000000000001111111, &this_class::__lui},
+        /* instruction AUIPC */
+        {32, 0b00000000000000000000000000010111, 0b00000000000000000000000001111111, &this_class::__auipc},
+        /* instruction JAL */
+        {32, 0b00000000000000000000000001101111, 0b00000000000000000000000001111111, &this_class::__jal},
+        /* instruction JALR */
+        {32, 0b00000000000000000000000001100111, 0b00000000000000000111000001111111, &this_class::__jalr},
+        /* instruction BEQ */
+        {32, 0b00000000000000000000000001100011, 0b00000000000000000111000001111111, &this_class::__beq},
+        /* instruction BNE */
+        {32, 0b00000000000000000001000001100011, 0b00000000000000000111000001111111, &this_class::__bne},
+        /* instruction BLT */
+        {32, 0b00000000000000000100000001100011, 0b00000000000000000111000001111111, &this_class::__blt},
+        /* instruction BGE */
+        {32, 0b00000000000000000101000001100011, 0b00000000000000000111000001111111, &this_class::__bge},
+        /* instruction BLTU */
+        {32, 0b00000000000000000110000001100011, 0b00000000000000000111000001111111, &this_class::__bltu},
+        /* instruction BGEU */
+        {32, 0b00000000000000000111000001100011, 0b00000000000000000111000001111111, &this_class::__bgeu},
+        /* instruction LB */
+        {32, 0b00000000000000000000000000000011, 0b00000000000000000111000001111111, &this_class::__lb},
+        /* instruction LH */
+        {32, 0b00000000000000000001000000000011, 0b00000000000000000111000001111111, &this_class::__lh},
+        /* instruction LW */
+        {32, 0b00000000000000000010000000000011, 0b00000000000000000111000001111111, &this_class::__lw},
+        /* instruction LBU */
+        {32, 0b00000000000000000100000000000011, 0b00000000000000000111000001111111, &this_class::__lbu},
+        /* instruction LHU */
+        {32, 0b00000000000000000101000000000011, 0b00000000000000000111000001111111, &this_class::__lhu},
+        /* instruction SB */
+        {32, 0b00000000000000000000000000100011, 0b00000000000000000111000001111111, &this_class::__sb},
+        /* instruction SH */
+        {32, 0b00000000000000000001000000100011, 0b00000000000000000111000001111111, &this_class::__sh},
+        /* instruction SW */
+        {32, 0b00000000000000000010000000100011, 0b00000000000000000111000001111111, &this_class::__sw},
+        /* instruction ADDI */
+        {32, 0b00000000000000000000000000010011, 0b00000000000000000111000001111111, &this_class::__addi},
+        /* instruction SLTI */
+        {32, 0b00000000000000000010000000010011, 0b00000000000000000111000001111111, &this_class::__slti},
+        /* instruction SLTIU */
+        {32, 0b00000000000000000011000000010011, 0b00000000000000000111000001111111, &this_class::__sltiu},
+        /* instruction XORI */
+        {32, 0b00000000000000000100000000010011, 0b00000000000000000111000001111111, &this_class::__xori},
+        /* instruction ORI */
+        {32, 0b00000000000000000110000000010011, 0b00000000000000000111000001111111, &this_class::__ori},
+        /* instruction ANDI */
+        {32, 0b00000000000000000111000000010011, 0b00000000000000000111000001111111, &this_class::__andi},
+        /* instruction SLLI */
+        {32, 0b00000000000000000001000000010011, 0b11111100000000000111000001111111, &this_class::__slli},
+        /* instruction SRLI */
+        {32, 0b00000000000000000101000000010011, 0b11111100000000000111000001111111, &this_class::__srli},
+        /* instruction SRAI */
+        {32, 0b01000000000000000101000000010011, 0b11111100000000000111000001111111, &this_class::__srai},
+        /* instruction ADD */
+        {32, 0b00000000000000000000000000110011, 0b11111110000000000111000001111111, &this_class::__add},
+        /* instruction SUB */
+        {32, 0b01000000000000000000000000110011, 0b11111110000000000111000001111111, &this_class::__sub},
+        /* instruction SLL */
+        {32, 0b00000000000000000001000000110011, 0b11111110000000000111000001111111, &this_class::__sll},
+        /* instruction SLT */
+        {32, 0b00000000000000000010000000110011, 0b11111110000000000111000001111111, &this_class::__slt},
+        /* instruction SLTU */
+        {32, 0b00000000000000000011000000110011, 0b11111110000000000111000001111111, &this_class::__sltu},
+        /* instruction XOR */
+        {32, 0b00000000000000000100000000110011, 0b11111110000000000111000001111111, &this_class::__xor},
+        /* instruction SRL */
+        {32, 0b00000000000000000101000000110011, 0b11111110000000000111000001111111, &this_class::__srl},
+        /* instruction SRA */
+        {32, 0b01000000000000000101000000110011, 0b11111110000000000111000001111111, &this_class::__sra},
+        /* instruction OR */
+        {32, 0b00000000000000000110000000110011, 0b11111110000000000111000001111111, &this_class::__or},
+        /* instruction AND */
+        {32, 0b00000000000000000111000000110011, 0b11111110000000000111000001111111, &this_class::__and},
+        /* instruction FENCE */
+        {32, 0b00000000000000000000000000001111, 0b11110000000000000111000001111111, &this_class::__fence},
+        /* instruction FENCE_I */
+        {32, 0b00000000000000000001000000001111, 0b00000000000000000111000001111111, &this_class::__fence_i},
+        /* instruction ECALL */
+        {32, 0b00000000000000000000000001110011, 0b11111111111111111111111111111111, &this_class::__ecall},
+        /* instruction EBREAK */
+        {32, 0b00000000000100000000000001110011, 0b11111111111111111111111111111111, &this_class::__ebreak},
+        /* instruction URET */
+        {32, 0b00000000001000000000000001110011, 0b11111111111111111111111111111111, &this_class::__uret},
+        /* instruction SRET */
+        {32, 0b00010000001000000000000001110011, 0b11111111111111111111111111111111, &this_class::__sret},
+        /* instruction MRET */
+        {32, 0b00110000001000000000000001110011, 0b11111111111111111111111111111111, &this_class::__mret},
+        /* instruction WFI */
+        {32, 0b00010000010100000000000001110011, 0b11111111111111111111111111111111, &this_class::__wfi},
+        /* instruction SFENCE.VMA */
+        {32, 0b00010010000000000000000001110011, 0b11111110000000000111111111111111, &this_class::__sfence_vma},
+        /* instruction CSRRW */
+        {32, 0b00000000000000000001000001110011, 0b00000000000000000111000001111111, &this_class::__csrrw},
+        /* instruction CSRRS */
+        {32, 0b00000000000000000010000001110011, 0b00000000000000000111000001111111, &this_class::__csrrs},
+        /* instruction CSRRC */
+        {32, 0b00000000000000000011000001110011, 0b00000000000000000111000001111111, &this_class::__csrrc},
+        /* instruction CSRRWI */
+        {32, 0b00000000000000000101000001110011, 0b00000000000000000111000001111111, &this_class::__csrrwi},
+        /* instruction CSRRSI */
+        {32, 0b00000000000000000110000001110011, 0b00000000000000000111000001111111, &this_class::__csrrsi},
+        /* instruction CSRRCI */
+        {32, 0b00000000000000000111000001110011, 0b00000000000000000111000001111111, &this_class::__csrrci},
+        /* instruction LWU */
+        {32, 0b00000000000000000110000000000011, 0b00000000000000000111000001111111, &this_class::__lwu},
+        /* instruction LD */
+        {32, 0b00000000000000000011000000000011, 0b00000000000000000111000001111111, &this_class::__ld},
+        /* instruction SD */
+        {32, 0b00000000000000000011000000100011, 0b00000000000000000111000001111111, &this_class::__sd},
+        /* instruction ADDIW */
+        {32, 0b00000000000000000000000000011011, 0b00000000000000000111000001111111, &this_class::__addiw},
+        /* instruction SLLIW */
+        {32, 0b00000000000000000001000000011011, 0b11111110000000000111000001111111, &this_class::__slliw},
+        /* instruction SRLIW */
+        {32, 0b00000000000000000101000000011011, 0b11111110000000000111000001111111, &this_class::__srliw},
+        /* instruction SRAIW */
+        {32, 0b01000000000000000101000000011011, 0b11111110000000000111000001111111, &this_class::__sraiw},
+        /* instruction ADDW */
+        {32, 0b00000000000000000000000000111011, 0b11111110000000000111000001111111, &this_class::__addw},
+        /* instruction SUBW */
+        {32, 0b01000000000000000000000000111011, 0b11111110000000000111000001111111, &this_class::__subw},
+        /* instruction SLLW */
+        {32, 0b00000000000000000001000000111011, 0b11111110000000000111000001111111, &this_class::__sllw},
+        /* instruction SRLW */
+        {32, 0b00000000000000000101000000111011, 0b11111110000000000111000001111111, &this_class::__srlw},
+        /* instruction SRAW */
+        {32, 0b01000000000000000101000000111011, 0b11111110000000000111000001111111, &this_class::__sraw},
+    }};
+ 
+    /* instruction definitions */
+    /* instruction 0: LUI */
+    compile_ret_t __lui(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 1: AUIPC */
+    compile_ret_t __auipc(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 2: JAL */
+    compile_ret_t __jal(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 3: JALR */
+    compile_ret_t __jalr(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 4: BEQ */
+    compile_ret_t __beq(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 5: BNE */
+    compile_ret_t __bne(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 6: BLT */
+    compile_ret_t __blt(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 7: BGE */
+    compile_ret_t __bge(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 8: BLTU */
+    compile_ret_t __bltu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 9: BGEU */
+    compile_ret_t __bgeu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 10: LB */
+    compile_ret_t __lb(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 11: LH */
+    compile_ret_t __lh(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 12: LW */
+    compile_ret_t __lw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 13: LBU */
+    compile_ret_t __lbu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 14: LHU */
+    compile_ret_t __lhu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 15: SB */
+    compile_ret_t __sb(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 16: SH */
+    compile_ret_t __sh(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 17: SW */
+    compile_ret_t __sw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 18: ADDI */
+    compile_ret_t __addi(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 19: SLTI */
+    compile_ret_t __slti(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 20: SLTIU */
+    compile_ret_t __sltiu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 21: XORI */
+    compile_ret_t __xori(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 22: ORI */
+    compile_ret_t __ori(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 23: ANDI */
+    compile_ret_t __andi(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 24: SLLI */
+    compile_ret_t __slli(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 25: SRLI */
+    compile_ret_t __srli(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 26: SRAI */
+    compile_ret_t __srai(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 27: ADD */
+    compile_ret_t __add(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 28: SUB */
+    compile_ret_t __sub(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 29: SLL */
+    compile_ret_t __sll(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 30: SLT */
+    compile_ret_t __slt(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 31: SLTU */
+    compile_ret_t __sltu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 32: XOR */
+    compile_ret_t __xor(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 33: SRL */
+    compile_ret_t __srl(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 34: SRA */
+    compile_ret_t __sra(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 35: OR */
+    compile_ret_t __or(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 36: AND */
+    compile_ret_t __and(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 37: FENCE */
+    compile_ret_t __fence(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 38: FENCE_I */
+    compile_ret_t __fence_i(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 39: ECALL */
+    compile_ret_t __ecall(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 40: EBREAK */
+    compile_ret_t __ebreak(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 41: URET */
+    compile_ret_t __uret(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 42: SRET */
+    compile_ret_t __sret(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 43: MRET */
+    compile_ret_t __mret(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 44: WFI */
+    compile_ret_t __wfi(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 45: SFENCE.VMA */
+    compile_ret_t __sfence_vma(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 46: CSRRW */
+    compile_ret_t __csrrw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 47: CSRRS */
+    compile_ret_t __csrrs(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 48: CSRRC */
+    compile_ret_t __csrrc(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 49: CSRRWI */
+    compile_ret_t __csrrwi(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 50: CSRRSI */
+    compile_ret_t __csrrsi(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 51: CSRRCI */
+    compile_ret_t __csrrci(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 52: LWU */
+    compile_ret_t __lwu(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 53: LD */
+    compile_ret_t __ld(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 54: SD */
+    compile_ret_t __sd(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 55: ADDIW */
+    compile_ret_t __addiw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 56: SLLIW */
+    compile_ret_t __slliw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 57: SRLIW */
+    compile_ret_t __srliw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 58: SRAIW */
+    compile_ret_t __sraiw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 59: ADDW */
+    compile_ret_t __addw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 60: SUBW */
+    compile_ret_t __subw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 61: SLLW */
+    compile_ret_t __sllw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 62: SRLW */
+    compile_ret_t __srlw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /* instruction 63: SRAW */
+    compile_ret_t __sraw(virt_addr_t& pc, code_word_t instr, std::ostringstream& os){
+    }
+    
+    /****************************************************************************
+     * end opcode definitions
+     ****************************************************************************/
+    compile_ret_t illegal_intruction(virt_addr_t &pc, code_word_t instr, std::stringstream& os) {
+		this->gen_sync(iss::PRE_SYNC, instr_descr.size());
+        this->builder.CreateStore(this->builder.CreateLoad(get_reg_ptr(traits<ARCH>::NEXT_PC), true),
+                                   get_reg_ptr(traits<ARCH>::PC), true);
+        this->builder.CreateStore(
+            this->builder.CreateAdd(this->builder.CreateLoad(get_reg_ptr(traits<ARCH>::ICOUNT), true),
+                                     this->gen_const(64U, 1)),
+            get_reg_ptr(traits<ARCH>::ICOUNT), true);
+        pc = pc + ((instr & 3) == 3 ? 4 : 2);
+        this->gen_raise_trap(0, 2);     // illegal instruction trap
+		this->gen_sync(iss::POST_SYNC, instr_descr.size());
+        this->gen_trap_check(this->leave_blk);
+        return BRANCH;
+    }
+};
+
+template <typename CODE_WORD> void debug_fn(CODE_WORD insn) {
+    volatile CODE_WORD x = insn;
+    insn = 2 * x;
+}
+
+template <typename ARCH> vm_impl<ARCH>::vm_impl() { this(new ARCH()); }
+
+template <typename ARCH>
+vm_impl<ARCH>::vm_impl(ARCH &core, unsigned core_id, unsigned cluster_id)
+: vm_base<ARCH>(core, core_id, cluster_id) {
+    qlut[0] = lut_00.data();
+    qlut[1] = lut_01.data();
+    qlut[2] = lut_10.data();
+    qlut[3] = lut_11.data();
+    for (auto instr : instr_descr) {
+        auto quantrant = instr.value & 0x3;
+        expand_bit_mask(29, lutmasks[quantrant], instr.value >> 2, instr.mask >> 2, 0, qlut[quantrant], instr.op);
+    }
+}
+
+template <typename ARCH>
+std::tuple<continuation_e>
+vm_impl<ARCH>::gen_single_inst_behavior(virt_addr_t &pc, unsigned int &inst_cnt, std::ostringstrem& os) {
+    // we fetch at max 4 byte, alignment is 2
+    enum {TRAP_ID=1<<16};
+    code_word_t insn = 0;
+    const typename traits<ARCH>::addr_t upper_bits = ~traits<ARCH>::PGMASK;
+    phys_addr_t paddr(pc);
+    auto *const data = (uint8_t *)&insn;
+    paddr = this->core.v2p(pc);
+    if ((pc.val & upper_bits) != ((pc.val + 2) & upper_bits)) { // we may cross a page boundary
+        auto res = this->core.read(paddr, 2, data);
+        if (res != iss::Ok) throw trap_access(TRAP_ID, pc.val);
+        if ((insn & 0x3) == 0x3) { // this is a 32bit instruction
+            res = this->core.read(this->core.v2p(pc + 2), 2, data + 2);
+        }
+    } else {
+        auto res = this->core.read(paddr, 4, data);
+        if (res != iss::Ok) throw trap_access(TRAP_ID, pc.val);
+    }
+    if (insn == 0x0000006f || (insn&0xffff)==0xa001) throw simulation_stopped(0); // 'J 0' or 'C.J 0'
+    // curr pc on stack
+    ++inst_cnt;
+    auto lut_val = extract_fields(insn);
+    auto f = qlut[insn & 0x3][lut_val];
+    if (f == nullptr) {
+        f = &this_class::illegal_intruction;
+    }
+    return (this->*f)(pc, insn, this_block);
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_leave_behavior(BasicBlock *leave_blk) {
+    this->builder.SetInsertPoint(leave_blk);
+    this->builder.CreateRet(this->builder.CreateLoad(get_reg_ptr(arch::traits<ARCH>::NEXT_PC), false));
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_raise_trap(uint16_t trap_id, uint16_t cause) {
+    auto *TRAP_val = this->gen_const(32, 0x80 << 24 | (cause << 16) | trap_id);
+    this->builder.CreateStore(TRAP_val, get_reg_ptr(traits<ARCH>::TRAP_STATE), true);
+    this->builder.CreateStore(this->gen_const(32U, std::numeric_limits<uint32_t>::max()), get_reg_ptr(traits<ARCH>::LAST_BRANCH), false);
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_leave_trap(unsigned lvl) {
+    std::vector<Value *> args{ this->core_ptr, ConstantInt::get(getContext(), APInt(64, lvl)) };
+    this->builder.CreateCall(this->mod->getFunction("leave_trap"), args);
+    auto *PC_val = this->gen_read_mem(traits<ARCH>::CSR, (lvl << 8) + 0x41, traits<ARCH>::XLEN / 8);
+    this->builder.CreateStore(PC_val, get_reg_ptr(traits<ARCH>::NEXT_PC), false);
+    this->builder.CreateStore(this->gen_const(32U, std::numeric_limits<uint32_t>::max()), get_reg_ptr(traits<ARCH>::LAST_BRANCH), false);
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_wait(unsigned type) {
+    std::vector<Value *> args{ this->core_ptr, ConstantInt::get(getContext(), APInt(64, type)) };
+    this->builder.CreateCall(this->mod->getFunction("wait"), args);
+}
+
+template <typename ARCH> void vm_impl<ARCH>::gen_trap_behavior(BasicBlock *trap_blk) {
+    this->builder.SetInsertPoint(trap_blk);
+    auto *trap_state_val = this->builder.CreateLoad(get_reg_ptr(traits<ARCH>::TRAP_STATE), true);
+    this->builder.CreateStore(this->gen_const(32U, std::numeric_limits<uint32_t>::max()),
+                              get_reg_ptr(traits<ARCH>::LAST_BRANCH), false);
+    std::vector<Value *> args{this->core_ptr, this->adj_to64(trap_state_val),
+                              this->adj_to64(this->builder.CreateLoad(get_reg_ptr(traits<ARCH>::PC), false))};
+    this->builder.CreateCall(this->mod->getFunction("enter_trap"), args);
+    auto *trap_addr_val = this->builder.CreateLoad(get_reg_ptr(traits<ARCH>::NEXT_PC), false);
+    this->builder.CreateRet(trap_addr_val);
+}
+
+template <typename ARCH> inline void vm_impl<ARCH>::gen_trap_check(BasicBlock *bb) {
+    auto *v = this->builder.CreateLoad(get_reg_ptr(arch::traits<ARCH>::TRAP_STATE), true);
+    this->gen_cond_branch(this->builder.CreateICmp(
+                              ICmpInst::ICMP_EQ, v,
+                              ConstantInt::get(getContext(), APInt(v->getType()->getIntegerBitWidth(), 0))),
+                          bb, this->trap_blk, 1);
+}
+} // namespace rv64i
+
+template <>
+std::unique_ptr<vm_if> create<arch::rv64i>(arch::rv64i *core, unsigned short port, bool dump) {
+    auto ret = new rv64i::vm_impl<arch::rv64i>(*core, dump);
+    if (port != 0) debugger::server<debugger::gdb_session>::run_server(ret, port);
+    return std::unique_ptr<vm_if>(ret);
+}
+}
+} // namespace iss