fix RVM description bugs

Conflicts:
	gen_input/CoreDSL-Instruction-Set-Description

CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.12)
 
-project("riscv" VERSION 1.0.0)
+project(tgfs VERSION 1.0.0)
 
 include(GNUInstallDirs)
 
@@ -28,18 +28,18 @@ add_subdirectory(softfloat)
 
 # library files
 FILE(GLOB RiscVSCHeaders ${CMAKE_CURRENT_SOURCE_DIR}/incl/sysc/*.h ${CMAKE_CURRENT_SOURCE_DIR}/incl/sysc/*/*.h)
-set(LIB_HEADERS ${RiscVSCHeaders} )
+set(LIB_HEADERS tgfscVSCHeaders} )
 set(LIB_SOURCES 
-	src/iss/tgf_b.cpp
-	src/iss/tgf_c.cpp
 	src/vm/fp_functions.cpp
-	src/vm/tcc/vm_tgf_b.cpp
-	src/vm/tcc/vm_tgf_c.cpp
-	src/vm/interp/vm_tgf_b.cpp
-	src/vm/interp/vm_tgf_c.cpp
     src/plugin/instruction_count.cpp
     src/plugin/cycle_estimate.cpp
 )
+if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/src/iss/tgf_b.cpp)
+    set(LIB_SOURCES ${LIB_SOURCES}  src/iss/tgf_b.cpp src/vm/interp/vm_tgf_b.cpp)
+endif()
+if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/src/iss/tgf_c.cpp)
+    set(LIB_SOURCES ${LIB_SOURCES}  src/iss/tgf_c.cpp src/vm/interp/vm_tgf_c.cpp)
+endif()
 if(WITH_LLVM)
 set(LIB_SOURCES ${LIB_SOURCES}
 	src/vm/llvm/fp_impl.cpp
@@ -49,56 +49,63 @@ set(LIB_SOURCES ${LIB_SOURCES}
 endif()
 
 # Define the library
-add_library(riscv SHARED ${LIB_SOURCES})
+add_library(tgfs SHARED ${LIB_SOURCES})
-target_compile_options(riscv PRIVATE -Wno-shift-count-overflow)
+# list code gen dependencies
-target_include_directories(riscv PUBLIC incl ../external/elfio)
+if(TARGET TGF_B_src)
-target_link_libraries(riscv PUBLIC softfloat scc-util)
+    add_dependencies(tgfs TGF_B_src)
-target_link_libraries(riscv PUBLIC -Wl,--whole-archive dbt-core -Wl,--no-whole-archive)
+endif()
-set_target_properties(riscv PROPERTIES
+if(TARGET TGF_C_src)
+    add_dependencies(tgfs TGF_C_src)
+endif()
+
+target_compile_options(tgfs PRIVATE -Wno-shift-count-overflow)
+target_include_directories(tgfs PUBLIC incl)
+target_link_libraries(tgfs PUBLIC softfloat scc-util)
+target_link_libraries(tgfs PUBLIC -Wl,--whole-archive dbt-core -Wl,--no-whole-archive)
+target_link_libraries(tgfs PUBLIC ${Boost_LIBRARIES} )
+set_target_properties(tgfs PROPERTIES
   VERSION ${PROJECT_VERSION}
   FRAMEWORK FALSE
   PUBLIC_HEADER "${LIB_HEADERS}" # specify the public headers
 )
 
 if(SystemC_FOUND)
-	add_library(riscv_sc src/sysc/core_complex.cpp)
+	add_library(tgfs_sc src/sysc/core_complex.cpp)
-	target_compile_definitions(riscv_sc PUBLIC WITH_SYSTEMC) 
+	target_compile_definitions(tgfs_sc PUBLIC WITH_SYSTEMC) 
-	target_include_directories(riscv_sc PUBLIC ../incl ${SystemC_INCLUDE_DIRS} ${CCI_INCLUDE_DIRS})
+	target_include_directories(tgfs_sc PUBLIC ../incl ${SystemC_INCLUDE_DIRS} ${CCI_INCLUDE_DIRS})
 	
 	if(SCV_FOUND)   
-	    target_compile_definitions(riscv_sc PUBLIC WITH_SCV)
+	    target_compile_definitions(tgfs_sc PUBLIC WITH_SCV)
-	    target_include_directories(riscv_sc PUBLIC ${SCV_INCLUDE_DIRS})
+	    target_include_directories(tgfs_sc PUBLIC ${SCV_INCLUDE_DIRS})
 	endif()
-	target_link_libraries(riscv_sc PUBLIC riscv scc )
+	target_link_libraries(tgfs_sc PUBLIC tgfs scc )
 	if(WITH_LLVM)
-		target_link_libraries(riscv_sc PUBLIC ${llvm_libs})
+		target_link_libraries(tgfs_sc PUBLIC ${llvm_libs})
 	endif()
-	target_link_libraries(riscv_sc PUBLIC ${Boost_LIBRARIES} )
+	set_target_properties(tgfs_sc PROPERTIES
-	set_target_properties(riscv_sc PROPERTIES
 	  VERSION ${PROJECT_VERSION}
 	  FRAMEWORK FALSE
 	  PUBLIC_HEADER "${LIB_HEADERS}" # specify the public headers
 	)
 endif()
 
-project("riscv-sim")
+project("tgfs-sim")
-add_executable(riscv-sim src/main.cpp)
+add_executable(tgfs-sim src/main.cpp)
 # This sets the include directory for the reference project. This is the -I flag in gcc.
-target_include_directories(riscv-sim PRIVATE ../external/libGIS)
+
 if(WITH_LLVM)
-	target_compile_definitions(riscv-sim PRIVATE WITH_LLVM)
+	target_compile_definitions(tgfs-sim PRIVATE WITH_LLVM)
-	target_link_libraries(riscv-sim PUBLIC ${llvm_libs})
+	target_link_libraries(tgfs-sim PUBLIC ${llvm_libs})
 endif()
 # Links the target exe against the libraries
-target_link_libraries(riscv-sim riscv)
+target_link_libraries(tgfs-sim tgfs)
-target_link_libraries(riscv-sim jsoncpp)
+target_link_libraries(tgfs-sim jsoncpp)
-target_link_libraries(riscv-sim external)
+target_link_libraries(tgfs-sim ${Boost_LIBRARIES} )
-target_link_libraries(riscv-sim ${Boost_LIBRARIES} )
 if (Tcmalloc_FOUND)
-    target_link_libraries(riscv-sim ${Tcmalloc_LIBRARIES})
+    target_link_libraries(tgfs-sim ${Tcmalloc_LIBRARIES})
 endif(Tcmalloc_FOUND)
 
-install(TARGETS riscv riscv-sim
+install(TARGETS tgfs tgfs-sim
   EXPORT ${PROJECT_NAME}Targets            # for downstream dependencies
   ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR} COMPONENT libs   # static lib
   RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT libs   # binaries

gen_input/TGFS.core_desc

@@ -3,26 +3,25 @@ import "CoreDSL-Instruction-Set-Description/RVM.core_desc"
 import "CoreDSL-Instruction-Set-Description/RVC.core_desc"
 
 Core TGF_B provides RV32I {
-	constants {
+	architectural_state {
-        XLEN:=32;
+        unsigned XLEN=32;
-        PCLEN:=32;
+        unsigned PCLEN=32;
         // definitions for the architecture wrapper
-        //          XL    ZYXWVUTSRQPONMLKJIHGFEDCBA
+        //                    XL    ZYXWVUTSRQPONMLKJIHGFEDCBA
-        MISA_VAL:=0b01000000000000000000000100000000;
+        unsigned MISA_VAL = 0b01000000000000000000000100000000;
-        PGSIZE := 0x1000; //1 << 12;
+        unsigned PGSIZE = 0x1000; //1 << 12;
-        PGMASK := 0xfff; //PGSIZE-1
+        unsigned PGMASK = 0xfff; //PGSIZE-1
 	}
 }
 
 Core TGF_C provides RV32I, RV32M, RV32IC {
-    constants {
+    architectural_state {
-        XLEN:=32;
+        unsigned XLEN=32;
-        PCLEN:=32;
+        unsigned PCLEN=32;
-        MUL_LEN:=64;
         // definitions for the architecture wrapper
-        //          XL    ZYXWVUTSRQPONMLKJIHGFEDCBA
+        //                    XL    ZYXWVUTSRQPONMLKJIHGFEDCBA
-        MISA_VAL:=0b01000000000000000001000100000100;
+        unsigned MISA_VAL = 0b01000000000000000001000100000100;
-        PGSIZE := 0x1000; //1 << 12;
+        unsigned PGSIZE = 0x1000; //1 << 12;
-        PGMASK := 0xfff; //PGSIZE-1
+        unsigned PGMASK = 0xfff; //PGSIZE-1
     }
-}
+}

gen_input/minres_rv.core_desc

@@ -1,74 +0,0 @@
-import "RV32I.core_desc"
-import "RV64I.core_desc"
-import "RVM.core_desc"
-import "RVA.core_desc"
-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;
-        PCLEN:=32;
-        MUL_LEN:=64;
-        // definitions for the architecture wrapper
-        //          XL    ZYXWVUTSRQPONMLKJIHGFEDCBA
-        MISA_VAL:=0b01000000000101000001000100000101;
-        PGSIZE := 0x1000; //1 << 12;
-        PGMASK := 0xfff; //PGSIZE-1
-    }
-}
-
-Core RV32GC provides RV32I, RV32M, RV32A, RV32F, RV32D, RV32IC, RV32FC, RV32DC {
-    constants {
-        XLEN:=32;
-        FLEN:=64;
-        PCLEN:=32;
-        MUL_LEN:=64;
-        // definitions for the architecture wrapper
-        //          XL    ZYXWVUTSRQPONMLKJIHGFEDCBA
-        MISA_VAL:=0b01000000000101000001000100101101;
-        PGSIZE := 0x1000; //1 << 12;
-        PGMASK := 0xfff; //PGSIZE-1
-    }
-}
-
-Core RV64I provides RV64I {
-    constants {
-        XLEN:=64;
-        PCLEN:=64;
-        // definitions for the architecture wrapper
-        //          XL    ZYXWVUTSRQPONMLKJIHGFEDCBA
-        MISA_VAL:=0b10000000000001000000000100000000;
-        PGSIZE := 0x1000; //1 << 12;
-        PGMASK := 0xfff; //PGSIZE-1
-    }
-}
-
-Core RV64GC provides RV64I, RV64M, RV64A, RV64F, RV64D, RV32FC, RV32DC, RV64IC {
-    constants {
-        XLEN:=64;
-        FLEN:=64;
-        PCLEN:=64;
-        MUL_LEN:=128;
-        // definitions for the architecture wrapper
-        //          XL    ZYXWVUTSRQPONMLKJIHGFEDCBA
-        MISA_VAL:=0b01000000000101000001000100101101;
-        PGSIZE := 0x1000; //1 << 12;
-        PGMASK := 0xfff; //PGSIZE-1
-    }
-}
-

gen_input/templates/CORENAME.cpp.gtl

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (C) 2017, 2018 MINRES Technologies GmbH
+ * Copyright (C) 2017 - 2020 MINRES Technologies GmbH
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -29,41 +29,48 @@
  * POSSIBILITY OF SUCH DAMAGE.
  *
  *******************************************************************************/
- 
+<% 
+def getRegisterSizes(){
+	def regs = registers.collect{it.size}
+	regs[-1]=64 // correct for NEXT_PC
+	regs+=[32, 32, 64] // append TRAP_STATE, PENDING_TRAP, ICOUNT
+    return regs
+}
+%>
 #include "util/ities.h"
 #include <util/logging.h>
-#include <iss/arch/tgf_b.h>
+#include <iss/arch/${coreDef.name.toLowerCase()}.h>
 #include <cstdio>
 #include <cstring>
 #include <fstream>
 
 using namespace iss::arch;
 
-constexpr std::array<const char*, 33>    iss::arch::traits<iss::arch::tgf_b>::reg_names;
+constexpr std::array<const char*, ${registers.size}>    iss::arch::traits<iss::arch::${coreDef.name.toLowerCase()}>::reg_names;
-constexpr std::array<const char*, 33>    iss::arch::traits<iss::arch::tgf_b>::reg_aliases;
+constexpr std::array<const char*, ${registers.size}>    iss::arch::traits<iss::arch::${coreDef.name.toLowerCase()}>::reg_aliases;
-constexpr std::array<const uint32_t, 39> iss::arch::traits<iss::arch::tgf_b>::reg_bit_widths;
+constexpr std::array<const uint32_t, ${getRegisterSizes().size}> iss::arch::traits<iss::arch::${coreDef.name.toLowerCase()}>::reg_bit_widths;
-constexpr std::array<const uint32_t, 40> iss::arch::traits<iss::arch::tgf_b>::reg_byte_offsets;
+constexpr std::array<const uint32_t, ${getRegisterSizes().size}> iss::arch::traits<iss::arch::${coreDef.name.toLowerCase()}>::reg_byte_offsets;
 
-tgf_b::tgf_b() {
+${coreDef.name.toLowerCase()}::${coreDef.name.toLowerCase()}() {
     reg.icount = 0;
 }
 
-tgf_b::~tgf_b() = default;
+${coreDef.name.toLowerCase()}::~${coreDef.name.toLowerCase()}() = default;
 
-void tgf_b::reset(uint64_t address) {
+void ${coreDef.name.toLowerCase()}::reset(uint64_t address) {
-    for(size_t i=0; i<traits<tgf_b>::NUM_REGS; ++i) set_reg(i, std::vector<uint8_t>(sizeof(traits<tgf_b>::reg_t),0));
+    for(size_t i=0; i<traits<${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.PRIV=0x3;
     reg.trap_state=0;
-    reg.machine_state=0x3;
     reg.icount=0;
 }
 
-uint8_t *tgf_b::get_regs_base_ptr() {
+uint8_t *${coreDef.name.toLowerCase()}::get_regs_base_ptr() {
 	return reinterpret_cast<uint8_t*>(&reg);
 }
 
-tgf_b::phys_addr_t tgf_b::virt2phys(const iss::addr_t &pc) {
+${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/CORENAME.h.gtl

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (C) 2017, 2018 MINRES Technologies GmbH
+ * Copyright (C) 2017 - 2021 MINRES Technologies GmbH
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -29,47 +29,38 @@
  * POSSIBILITY OF SUCH DAMAGE.
  *
  *******************************************************************************/
+<%
+import com.minres.coredsl.util.BigIntegerWithRadix
 
-<% 
+def nativeTypeSize(int size){
-import com.minres.coredsl.coreDsl.Register
+    if(size<=8) return 8; else if(size<=16) return 16; else if(size<=32) return 32; else return 64;
-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){
+def getRegisterSizes(){
-    if( reg.original instanceof RegisterFile) {
+    def regs = registers.collect{nativeTypeSize(it.size)}
-    	if( reg.index != null ) {
+    regs+=[32,32, 64] // append TRAP_STATE, PENDING_TRAP, ICOUNT
-        	return reg.original.name+generator.generateHostCode(reg.index)
+    return regs
-        } else {
+}
-        	return reg.original.name
+def getRegisterOffsets(){
-        }
+    def offset = 0
-    } else if(reg.original instanceof Register){
+    def offsets = []
-        return reg.original.name
+    getRegisterSizes().each { size ->
+        offsets<<offset
+        offset+=size/8
     }
+    return offsets
 }
-def getRegisterNames(){
+def byteSize(int size){
-	def regNames = []
+    if(size<=8) return 8;
- 	allRegs.each { reg -> 
+    if(size<=16) return 16;
-		if( reg instanceof RegisterFile) {
+    if(size<=32) return 32;
-			(reg.range.right..reg.range.left).each{
+    if(size<=64) return 64;
-    			regNames+=reg.name.toLowerCase()+it
+    return 128;
-            }
-        } else if(reg instanceof Register){
-    		regNames+=reg.name.toLowerCase()
-        }
-    }
-    return regNames
 }
-def getRegisterAliasNames(){
+def getCString(def val){
-	def regMap = allRegs.findAll{it instanceof RegisterAlias }.collectEntries {[getOriginalName(it), it.name]}
+    if(val instanceof BigIntegerWithRadix)
- 	return allRegs.findAll{it instanceof Register || it instanceof RegisterFile}.collect{reg ->
+        return ((BigIntegerWithRadix)val).toCString()
-		if( reg instanceof RegisterFile) {
+    else
-			return (reg.range.right..reg.range.left).collect{ (regMap[reg.name]?:regMap[reg.name+it]?:reg.name.toLowerCase()+it).toLowerCase() }
+        return val.toString()
-        } else if(reg instanceof Register){
-    		regMap[reg.name]?:reg.name.toLowerCase()
-        }
- 	}.flatten()
 }
 %>
 #ifndef _${coreDef.name.toUpperCase()}_H_
@@ -87,43 +78,26 @@ struct ${coreDef.name.toLowerCase()};
 
 template <> struct traits<${coreDef.name.toLowerCase()}> {
 
-	constexpr static char const* const core_type = "${coreDef.name}";
+    constexpr static char const* const core_type = "${coreDef.name}";
     
-  	static constexpr std::array<const char*, ${getRegisterNames().size}> reg_names{
+    static constexpr std::array<const char*, ${registers.size}> reg_names{
- 		{"${getRegisterNames().join("\", \"")}"}};
+        {"${registers.collect{it.name}.join('", "')}"}};
  
-  	static constexpr std::array<const char*, ${getRegisterAliasNames().size}> reg_aliases{
+    static constexpr std::array<const char*, ${registers.size}> reg_aliases{
- 		{"${getRegisterAliasNames().join("\", \"")}"}};
+        {"${registers.collect{it.alias}.join('", "')}"}};
 
-    enum constants {${coreDef.constants.collect{c -> c.name+"="+c.value}.join(', ')}};
+    enum constants {${constants.collect{c -> c.name+"="+getCString(c.value)}.join(', ')}};
 
-    constexpr static unsigned FP_REGS_SIZE = ${coreDef.constants.find {it.name=='FLEN'}?.value?:0};
+    constexpr static unsigned FP_REGS_SIZE = ${constants.find {it.name=='FLEN'}?.value?:0};
 
-    enum reg_e {<%
+    enum reg_e {
-     	allRegs.each { reg -> 
+        ${registers.collect{it.name}.join(', ')}, NUM_REGS,
-    		if( reg instanceof RegisterFile) {
+        TRAP_STATE=NUM_REGS,
-    			(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,
+        ICOUNT
-        LAST_BRANCH,
-        ICOUNT<% 
-     	allRegs.each { reg -> 
-    		if(reg instanceof RegisterAlias){ def aliasname=getOriginalName(reg)%>,
-        ${reg.name} = ${aliasname}<%
-            }
-        }%>
     };
 
-    using reg_t = uint${regDataWidth}_t;
+    using reg_t = uint${addrDataWidth}_t;
 
     using addr_t = uint${addrDataWidth}_t;
 
@@ -133,17 +107,22 @@ template <> struct traits<${coreDef.name.toLowerCase()}> {
 
     using phys_addr_t = iss::typed_addr_t<iss::address_type::PHYSICAL>;
 
- 	static constexpr std::array<const uint32_t, ${regSizes.size}> reg_bit_widths{
+    static constexpr std::array<const uint32_t, ${getRegisterSizes().size}> reg_bit_widths{
- 		{${regSizes.join(",")}}};
+        {${getRegisterSizes().join(',')}}};
 
-    static constexpr std::array<const uint32_t, ${regOffsets.size}> reg_byte_offsets{
+    static constexpr std::array<const uint32_t, ${getRegisterOffsets().size}> reg_byte_offsets{
-    	{${regOffsets.join(",")}}};
+        {${getRegisterOffsets().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(', ')} };
+    enum mem_type_e { ${spaces.collect{it.name}.join(', ')} };
+    
+    enum class opcode_e : unsigned short {<%instructions.eachWithIndex{instr, index -> %>
+        ${instr.instruction.name} = ${index},<%}%>
+        MAX_OPCODE
+    };
 };
 
 struct ${coreDef.name.toLowerCase()}: public arch_if {
@@ -189,32 +168,27 @@ struct ${coreDef.name.toLowerCase()}: public arch_if {
     inline uint32_t get_last_branch() { return reg.last_branch; }
 
 protected:
+#pragma pack(push, 1)
     struct ${coreDef.name}_regs {<%
-     	allRegs.each { reg -> 
+        registers.each { reg -> if(reg.size>0) {%> 
-    		if( reg instanceof RegisterFile) {
+        uint${byteSize(reg.size)}_t ${reg.name} = 0;<%
-    			(reg.range.right..reg.range.left).each{%>
+        }}%>
-        uint${generator.getSize(reg)}_t ${reg.name}${it} = 0;<%
+        uint32_t trap_state = 0, pending_trap = 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;
+        uint32_t last_branch;
     } reg;
-
+#pragma pack(pop)
     std::array<address_type, 4> addr_mode;
     
     uint64_t interrupt_sim=0;
 <%
-def fcsr = allRegs.find {it.name=='FCSR'}
+def fcsr = registers.find {it.name=='FCSR'}
 if(fcsr != null) {%>
-	uint${generator.getSize(fcsr)}_t get_fcsr(){return reg.FCSR;}
+    uint${fcsr.size}_t get_fcsr(){return reg.FCSR;}
-	void set_fcsr(uint${generator.getSize(fcsr)}_t val){reg.FCSR = val;}		
+    void set_fcsr(uint${fcsr.size}_t val){reg.FCSR = val;}      
 <%} else { %>
-	uint32_t get_fcsr(){return 0;}
+    uint32_t get_fcsr(){return 0;}
-	void set_fcsr(uint32_t val){}
+    void set_fcsr(uint32_t val){}
 <%}%>
 };
 

gen_input/templates/interp/CORENAME.cpp.gtl

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (C) 2020 MINRES Technologies GmbH
+ * Copyright (C) 2021 MINRES Technologies GmbH
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -56,13 +56,14 @@ using namespace iss::debugger;
 
 template <typename ARCH> class vm_impl : public iss::interp::vm_base<ARCH> {
 public:
-    using super = typename iss::interp::vm_base<ARCH>;
+    using traits = arch::traits<ARCH>;
+    using super       = typename iss::interp::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 addr_t      = typename super::addr_t;
-    using reg_t = typename traits<ARCH>::reg_t;
+    using reg_t       = typename traits::reg_t;
-    using iss::interp::vm_base<ARCH>::get_reg;
+    using mem_type_e  = typename traits::mem_type_e;
 
     vm_impl();
 
@@ -82,9 +83,9 @@ protected:
     using compile_ret_t = virt_addr_t;
     using compile_func = compile_ret_t (this_class::*)(virt_addr_t &pc, code_word_t instr);
 
-    inline const char *name(size_t index){return traits<ARCH>::reg_aliases.at(index);}
+    inline const char *name(size_t index){return traits::reg_aliases.at(index);}
 
-    virt_addr_t execute_inst(virt_addr_t start, std::function<bool(void)> pred) override;
+    virt_addr_t execute_inst(virt_addr_t start, std::function<bool(virt_addr_t&)> pred) override;
 
     // some compile time constants
     // enum { MASK16 = 0b1111110001100011, MASK32 = 0b11111111111100000111000001111111 };
@@ -138,23 +139,38 @@ protected:
         return lut_val;
     }
 
-    void raise_trap(uint16_t trap_id, uint16_t cause){
+    inline void raise(uint16_t trap_id, uint16_t cause){
         auto trap_val =  0x80ULL << 24 | (cause << 16) | trap_id;
-        this->template get_reg<uint32_t>(arch::traits<ARCH>::TRAP_STATE) = trap_val;
+        this->template get_reg<uint32_t>(traits::TRAP_STATE) = trap_val;
-        this->template get_reg<uint32_t>(arch::traits<ARCH>::NEXT_PC) = std::numeric_limits<uint32_t>::max();
+        this->template get_reg<uint32_t>(traits::NEXT_PC) = std::numeric_limits<uint32_t>::max();
     }
 
-    void leave_trap(unsigned lvl){
+    inline void leave(unsigned lvl){
         this->core.leave_trap(lvl);
-        auto pc_val = super::template read_mem<reg_t>(traits<ARCH>::CSR, (lvl << 8) + 0x41);
+        auto pc_val = super::template read_mem<reg_t>(traits::CSR, (lvl << 8) + 0x41);
-        this->template get_reg<reg_t>(arch::traits<ARCH>::NEXT_PC) = pc_val;
+        this->template get_reg<reg_t>(traits::NEXT_PC) = pc_val;
-        this->template get_reg<uint32_t>(arch::traits<ARCH>::LAST_BRANCH) = std::numeric_limits<uint32_t>::max();
     }
 
-    void wait(unsigned type){
+    inline void wait(unsigned type){
         this->core.wait_until(type);
     }
 
+    template<typename T>
+    T& pc_assign(T& val){super::ex_info.branch_taken=true; return val;}
+    inline uint8_t readSpace1(typename super::mem_type_e space, uint64_t addr){return super::template read_mem<uint8_t>(space, addr);}
+    inline uint16_t readSpace2(typename super::mem_type_e space, uint64_t addr){return super::template read_mem<uint16_t>(space, addr);}
+    inline uint32_t readSpace4(typename super::mem_type_e space, uint64_t addr){return super::template read_mem<uint32_t>(space, addr);}
+    inline uint64_t readSpace8(typename super::mem_type_e space, uint64_t addr){return super::template read_mem<uint64_t>(space, addr);}
+    inline void writeSpace1(typename super::mem_type_e space, uint64_t addr, uint8_t data){super::write_mem(space, addr, data);}
+    inline void writeSpace2(typename super::mem_type_e space, uint64_t addr, uint16_t data){super::write_mem(space, addr, data);}
+    inline void writeSpace4(typename super::mem_type_e space, uint64_t addr, uint32_t data){super::write_mem(space, addr, data);}
+    inline void writeSpace8(typename super::mem_type_e space, uint64_t addr, uint64_t data){super::write_mem(space, addr, data);}
+    template<unsigned W, typename U, typename S = typename std::make_signed<U>::type>
+    inline S sext(U from) {
+        auto mask = (1ULL<<W) - 1;
+        auto sign_mask = 1ULL<<(W-1);
+        return (from & mask) | ((from & sign_mask) ? ~mask : 0);
+    }
 
 private:
     /****************************************************************************
@@ -170,22 +186,70 @@ private:
     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)}},<%}%>
+        {${instr.length}, ${instr.encoding}, ${instr.mask}, &this_class::__${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){<%instr.code.eachLine{%>
+    compile_ret_t __${generator.functionName(instr.name)}(virt_addr_t& pc, code_word_t instr){
-        ${it}<%}%>
+        // pre execution stuff
+        this->do_sync(PRE_SYNC, ${idx});
+        <%instr.fields.eachLine{%>${it}
+        <%}%>if(this->disass_enabled){
+            /* generate console output when executing the command */
+            <%instr.disass.eachLine{%>${it}
+            <%}%>
+        }
+        // prepare execution
+        uint${addrDataWidth}_t* X = reinterpret_cast<uint${addrDataWidth}_t*>(this->regs_base_ptr+arch::traits<ARCH>::reg_byte_offsets[arch::traits<ARCH>::X0]);
+        uint${addrDataWidth}_t* PC = reinterpret_cast<uint${addrDataWidth}_t*>(this->regs_base_ptr+arch::traits<ARCH>::reg_byte_offsets[arch::traits<ARCH>::PC]);
+        uint${addrDataWidth}_t* NEXT_PC = reinterpret_cast<uint${addrDataWidth}_t*>(this->regs_base_ptr+arch::traits<ARCH>::reg_byte_offsets[arch::traits<ARCH>::NEXT_PC]);
+        *NEXT_PC = *PC + ${instr.length/8};
+        // execute instruction
+        <%instr.behavior.eachLine{%>${it}
+        <%}%>// post execution stuff
+        if(this->sync_exec && POST_SYNC) this->do_sync(POST_SYNC, ${idx});
+        auto* trap_state = reinterpret_cast<uint32_t*>(this->regs_base_ptr+arch::traits<ARCH>::reg_byte_offsets[arch::traits<ARCH>::TRAP_STATE]);
+        // trap check
+        if(*trap_state!=0){
+            super::core.enter_trap(*trap_state, pc.val);
+        }
+        pc.val=*NEXT_PC;
+        return pc;
     }
     <%}%>
     /****************************************************************************
      * end opcode definitions
      ****************************************************************************/
     compile_ret_t illegal_intruction(virt_addr_t &pc, code_word_t instr) {
-        pc = pc + ((instr & 3) == 3 ? 4 : 2);
+        this->do_sync(PRE_SYNC, static_cast<unsigned>(arch::traits<ARCH>::opcode_e::MAX_OPCODE));
+        uint32_t* PC = reinterpret_cast<uint32_t*>(this->regs_base_ptr+arch::traits<ARCH>::reg_byte_offsets[arch::traits<ARCH>::PC]);
+        uint32_t* NEXT_PC = reinterpret_cast<uint32_t*>(this->regs_base_ptr+arch::traits<ARCH>::reg_byte_offsets[arch::traits<ARCH>::NEXT_PC]);
+        *NEXT_PC = *PC + ((instr & 3) == 3 ? 4 : 2);
+        raise(0,  11);
+        // post execution stuff
+        if(this->sync_exec && POST_SYNC) this->do_sync(POST_SYNC, static_cast<unsigned>(arch::traits<ARCH>::opcode_e::MAX_OPCODE));
+        auto* trap_state = reinterpret_cast<uint32_t*>(this->regs_base_ptr+arch::traits<ARCH>::reg_byte_offsets[arch::traits<ARCH>::TRAP_STATE]);
+        // trap check
+        if(*trap_state!=0){
+            super::core.enter_trap(*trap_state, pc.val);
+        }
+        pc.val=*NEXT_PC;
         return pc;
     }
+
+    static constexpr typename traits::addr_t upper_bits = ~traits::PGMASK;
+    iss::status fetch_ins(virt_addr_t pc, uint8_t * data){
+        auto phys_pc = this->core.v2p(pc);
+        //if ((pc.val & upper_bits) != ((pc.val + 2) & upper_bits)) { // we may cross a page boundary
+        //    if (this->core.read(phys_pc, 2, data) != iss::Ok) return iss::Err;
+        //    if ((data[0] & 0x3) == 0x3) // this is a 32bit instruction
+        //        if (this->core.read(this->core.v2p(pc + 2), 2, data + 2) != iss::Ok) return iss::Err;
+        //} else {
+            if (this->core.read(phys_pc, 4, data) != iss::Ok)  return iss::Err;
+        //}
+        return iss::Ok;
+    }
 };
 
 template <typename CODE_WORD> void debug_fn(CODE_WORD insn) {
@@ -209,23 +273,19 @@ vm_impl<ARCH>::vm_impl(ARCH &core, unsigned core_id, unsigned cluster_id)
 }
 
 template <typename ARCH>
-typename vm_base<ARCH>::virt_addr_t vm_impl<ARCH>::execute_inst(virt_addr_t start, std::function<bool(void)> pred) {
+typename vm_base<ARCH>::virt_addr_t vm_impl<ARCH>::execute_inst(virt_addr_t start, std::function<bool(virt_addr_t&)> pred) {
     // we fetch at max 4 byte, alignment is 2
     enum {TRAP_ID=1<<16};
-    const typename traits<ARCH>::addr_t upper_bits = ~traits<ARCH>::PGMASK;
     code_word_t insn = 0;
     auto *const data = (uint8_t *)&insn;
     auto pc=start;
-    while(pred){
+    while(pred(pc)){
-        auto paddr = this->core.v2p(pc);
+        auto res = fetch_ins(pc, data);
-        if ((pc.val & upper_bits) != ((pc.val + 2) & upper_bits)) { // we may cross a page boundary
+        if(res!=iss::Ok){
-            if (this->core.read(paddr, 2, data) != iss::Ok) throw trap_access(TRAP_ID, pc.val);
+            auto new_pc = super::core.enter_trap(TRAP_ID, pc.val);
-            if ((insn & 0x3) == 0x3) // this is a 32bit instruction
+            res = fetch_ins(virt_addr_t{access_type::FETCH, new_pc}, data);
-                if (this->core.read(this->core.v2p(pc + 2), 2, data + 2) != iss::Ok) throw trap_access(TRAP_ID, pc.val);
+            if(res!=iss::Ok) throw simulation_stopped(0);
-        } else {
-            if (this->core.read(paddr, 4, data) != 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'
         auto lut_val = extract_fields(insn);
         auto f = qlut[insn & 0x3][lut_val];
         if (!f)

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

@@ -1,107 +0,0 @@
-/*******************************************************************************
- * 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 <iss/arch/${coreDef.name.toLowerCase()}.h>
-#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
-}
-

incl/iss/arch/.gitignore

@@ -0,0 +1 @@
+/tgf_b.h

incl/iss/arch/riscv_hart_m_p.h

@@ -50,6 +50,7 @@
 #include <sstream>
 #include <type_traits>
 #include <unordered_map>
+#include <functional>
 #include <util/bit_field.h>
 #include <util/ities.h>
 #include <util/sparse_array.h>
@@ -302,7 +303,7 @@ public:
 
         void write_mstatus(T val) {
             auto mask = get_mask();
-            auto new_val = (mstatus.st.value & ~mask) | (val & mask);
+            auto new_val = (mstatus.backing.val & ~mask) | (val & mask);
             mstatus = new_val;
         }
 
@@ -344,7 +345,19 @@ public:
     };
 
     iss::instrumentation_if *get_instrumentation_if() override { return &instr_if; }
- 
+
+    void setMemReadCb(std::function<iss::status(phys_addr_t, unsigned, uint8_t* const)> const& memReadCb) {
+        mem_read_cb = memReadCb;
+    }
+
+    void setMemWriteCb(std::function<iss::status(phys_addr_t, unsigned, const uint8_t* const)> const& memWriteCb) {
+        mem_write_cb = memWriteCb;
+    }
+
+    void set_csr(unsigned addr, reg_t val){
+        csr[addr & csr.page_addr_mask] = val;
+    }
+
 protected:
     struct riscv_instrumentation_if : public iss::instrumentation_if {
 
@@ -396,6 +409,8 @@ protected:
     std::unordered_map<unsigned, wr_csr_f> csr_wr_cb;
 
 private:
+    iss::status read_reg(unsigned addr, reg_t &val);
+    iss::status write_reg(unsigned addr, reg_t val);
     iss::status read_cycle(unsigned addr, reg_t &val);
     iss::status read_time(unsigned addr, reg_t &val);
     iss::status read_status(unsigned addr, reg_t &val);
@@ -406,7 +421,9 @@ private:
     iss::status write_ip(unsigned addr, reg_t val);
     iss::status read_hartid(unsigned addr, reg_t &val);
 
-    reg_t mhartid_reg{0xF};
+    reg_t mhartid_reg{0x0};
+    std::function<iss::status(phys_addr_t, unsigned, uint8_t *const)>mem_read_cb;
+    std::function<iss::status(phys_addr_t, unsigned, const uint8_t *const)> mem_write_cb;
 
 protected:
     void check_interrupt();
@@ -439,6 +456,12 @@ riscv_hart_m_p<BASE>::riscv_hart_m_p()
     csr_rd_cb[mie] = &riscv_hart_m_p<BASE>::read_ie;
     csr_wr_cb[mie] = &riscv_hart_m_p<BASE>::write_ie;
     csr_rd_cb[mhartid] = &riscv_hart_m_p<BASE>::read_hartid;
+    // common regs
+    const std::array<unsigned, 6> addrs{{mepc, mtvec, mscratch, mcause, mtval, mscratch}};
+    for(auto addr: addrs) {
+        csr_rd_cb[addr] = &riscv_hart_m_p<BASE>::read_reg;
+        csr_wr_cb[addr] = &riscv_hart_m_p<BASE>::write_reg;
+    }
 }
 
 template <typename BASE> std::pair<uint64_t, bool> riscv_hart_m_p<BASE>::load_file(std::string name, int type) {
@@ -653,32 +676,35 @@ iss::status riscv_hart_m_p<BASE>::write(const address_type type, const access_ty
 template <typename BASE> iss::status riscv_hart_m_p<BASE>::read_csr(unsigned addr, reg_t &val) {
     if (addr >= csr.size()) return iss::Err;
     auto req_priv_lvl = (addr >> 8) & 0x3;
-    if (this->reg.machine_state < req_priv_lvl) throw illegal_instruction_fault(this->fault_data);
+    if (this->reg.PRIV < req_priv_lvl) // not having required privileges
+        throw illegal_instruction_fault(this->fault_data);
     auto it = csr_rd_cb.find(addr);
-    if (it == csr_rd_cb.end()) {
+    if (it == csr_rd_cb.end() || !it->second) // non existent register
-        val = csr[addr & csr.page_addr_mask];
+        throw illegal_instruction_fault(this->fault_data);
-        return iss::Ok;
+    return (this->*(it->second))(addr, val);
-    }
-    rd_csr_f f = it->second;
-    if (f == nullptr) throw illegal_instruction_fault(this->fault_data);
-    return (this->*f)(addr, val);
 }
 
 template <typename BASE> iss::status riscv_hart_m_p<BASE>::write_csr(unsigned addr, reg_t val) {
     if (addr >= csr.size()) return iss::Err;
     auto req_priv_lvl = (addr >> 8) & 0x3;
-    if (this->reg.machine_state < req_priv_lvl)
+    if (this->reg.PRIV < req_priv_lvl) // not having required privileges
         throw illegal_instruction_fault(this->fault_data);
-    if((addr&0xc00)==0xc00)
+    if((addr&0xc00)==0xc00) // writing to read-only region
         throw illegal_instruction_fault(this->fault_data);
     auto it = csr_wr_cb.find(addr);
-    if (it == csr_wr_cb.end()) {
+    if (it == csr_wr_cb.end() || !it->second) // non existent register
-        csr[addr & csr.page_addr_mask] = val;
+        throw illegal_instruction_fault(this->fault_data);
-        return iss::Ok;
+    return (this->*(it->second))(addr, val);
-    }
+}
-    wr_csr_f f = it->second;
+
-    if (f == nullptr) throw illegal_instruction_fault(this->fault_data);
+template <typename BASE> iss::status riscv_hart_m_p<BASE>::read_reg(unsigned addr, reg_t &val) {
-    return (this->*f)(addr, val);
+    val = csr[addr];
+    return iss::Ok;
+}
+
+template <typename BASE> iss::status riscv_hart_m_p<BASE>::write_reg(unsigned addr, reg_t val) {
+    csr[addr] = val;
+    return iss::Ok;
 }
 
 template <typename BASE> iss::status riscv_hart_m_p<BASE>::read_cycle(unsigned addr, reg_t &val) {
@@ -749,6 +775,7 @@ template <typename BASE> iss::status riscv_hart_m_p<BASE>::write_ip(unsigned add
 template <typename BASE>
 iss::status riscv_hart_m_p<BASE>::read_mem(phys_addr_t paddr, unsigned length, uint8_t *const data) {
     if ((paddr.val + length) > mem.size()) return iss::Err;
+    if(mem_read_cb) return mem_read_cb(paddr, length, data);
     switch (paddr.val) {
     case 0x0200BFF8: { // CLINT base, mtime reg
         if (sizeof(reg_t) < length) return iss::Err;
@@ -774,6 +801,7 @@ iss::status riscv_hart_m_p<BASE>::read_mem(phys_addr_t paddr, unsigned length, u
 template <typename BASE>
 iss::status riscv_hart_m_p<BASE>::write_mem(phys_addr_t paddr, unsigned length, const uint8_t *const data) {
     if ((paddr.val + length) > mem.size()) return iss::Err;
+    if(mem_write_cb) return mem_write_cb(paddr, length, data);
     switch (paddr.val) {
     case 0x10013000: // UART0 base, TXFIFO reg
     case 0x10023000: // UART1 base, TXFIFO reg
@@ -861,7 +889,7 @@ template <typename BASE> void riscv_hart_m_p<BASE>::check_interrupt() {
     auto ena_irq = csr[mip] & csr[mie];
 
     bool mie = state.mstatus.MIE;
-    auto m_enabled = this->reg.machine_state < PRIV_M || (this->reg.machine_state == PRIV_M && mie);
+    auto m_enabled = this->reg.PRIV < PRIV_M || (this->reg.PRIV == PRIV_M && mie);
     auto enabled_interrupts = m_enabled ? ena_irq & ~ideleg : 0;
 
     if (enabled_interrupts != 0) {
@@ -906,7 +934,7 @@ template <typename BASE> uint64_t riscv_hart_m_p<BASE>::enter_trap(uint64_t flag
     this->reg.NEXT_PC = ivec & ~0x1UL;
     if ((ivec & 0x1) == 1 && trap_id != 0) this->reg.NEXT_PC += 4 * cause;
     // reset trap state
-    this->reg.machine_state = PRIV_M;
+    this->reg.PRIV = PRIV_M;
     this->reg.trap_state = 0;
     std::array<char, 32> buffer;
     sprintf(buffer.data(), "0x%016lx", addr);
@@ -918,20 +946,20 @@ template <typename BASE> uint64_t riscv_hart_m_p<BASE>::enter_trap(uint64_t flag
 }
 
 template <typename BASE> uint64_t riscv_hart_m_p<BASE>::leave_trap(uint64_t flags) {
-    auto cur_priv = this->reg.machine_state;
+    /* TODO: configurable support of User mode
+    auto cur_priv = this->reg.PRIV;
     auto inst_priv = flags & 0x3;
     auto status = state.mstatus;
 
     // pop the relevant lower-privilege interrupt enable and privilege mode stack
     // clear respective yIE
     if (inst_priv == PRIV_M) {
-        this->reg.machine_state = state.mstatus.MPP;
+        this->reg.PRIV = state.mstatus.MPP;
         state.mstatus.MPP = 0; // clear mpp to U mode
         state.mstatus.MIE = state.mstatus.MPIE;
     } else {
     	CLOG(ERROR, disass) << "Unsupported mode:" << inst_priv;
-    }
+    }*/
-
     // sets the pc to the value stored in the x epc register.
     this->reg.NEXT_PC = csr[mepc];
     CLOG(INFO, disass) << "Executing xRET";

incl/iss/arch/tgf_b.h

@@ -1,252 +0,0 @@
-/*******************************************************************************
- * 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 _TGF_B_H_
-#define _TGF_B_H_
-
-#include <array>
-#include <iss/arch/traits.h>
-#include <iss/arch_if.h>
-#include <iss/vm_if.h>
-
-namespace iss {
-namespace arch {
-
-struct tgf_b;
-
-template <> struct traits<tgf_b> {
-
-	constexpr static char const* const core_type = "TGF_B";
-    
-  	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=0b1000000000000000000000100000000, 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 tgf_b: public arch_if {
-
-    using virt_addr_t = typename traits<tgf_b>::virt_addr_t;
-    using phys_addr_t = typename traits<tgf_b>::phys_addr_t;
-    using reg_t =  typename traits<tgf_b>::reg_t;
-    using addr_t = typename traits<tgf_b>::addr_t;
-
-    tgf_b();
-    ~tgf_b();
-
-    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 uint64_t stop_code() { return interrupt_sim; }
-
-    inline phys_addr_t v2p(const iss::addr_t& addr){
-        if (addr.space != traits<tgf_b>::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<tgf_b>::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 TGF_B_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;
-    
-    uint64_t interrupt_sim=0;
-
-	uint32_t get_fcsr(){return 0;}
-	void set_fcsr(uint32_t val){}
-
-};
-
-}
-}            
-#endif /* _TGF_B_H_ */

incl/iss/arch/tgf_c.h

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (C) 2017, 2018 MINRES Technologies GmbH
+ * Copyright (C) 2017 - 2021 MINRES Technologies GmbH
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -30,7 +30,6 @@
  *
  *******************************************************************************/
 
-
 #ifndef _TGF_C_H_
 #define _TGF_C_H_
 
@@ -46,91 +45,23 @@ struct tgf_c;
 
 template <> struct traits<tgf_c> {
 
-	constexpr static char const* const core_type = "TGF_C";
+    constexpr static char const* const core_type = "TGF_C";
     
-  	static constexpr std::array<const char*, 33> reg_names{
+    static constexpr std::array<const char*, 35> 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"}};
+        {"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", "NEXT_PC", "PRIV"}};
  
-  	static constexpr std::array<const char*, 33> reg_aliases{
+    static constexpr std::array<const char*, 35> 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"}};
+        {"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", "NEXT_PC", "PRIV"}};
 
-    enum constants {XLEN=32, PCLEN=32, MUL_LEN=64, MISA_VAL=0b1000000000000000001000100000100, PGSIZE=0x1000, PGMASK=0xfff};
+    enum constants {XLEN=32, PCLEN=32, MISA_VAL=0b01000000000000000001000100000100, PGSIZE=0x1000, PGMASK=0b111111111111, CSR_SIZE=4096, fence=0, fencei=1, fencevmal=2, fencevmau=3, eei_aligned_addresses=1, MUL_LEN=64};
 
     constexpr static unsigned FP_REGS_SIZE = 0;
 
     enum reg_e {
-        X0,
+        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, NEXT_PC, PRIV, NUM_REGS,
-        X1,
+        TRAP_STATE=NUM_REGS,
-        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,
+        ICOUNT
-        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;
@@ -143,17 +74,109 @@ template <> struct traits<tgf_c> {
 
     using phys_addr_t = iss::typed_addr_t<iss::address_type::PHYSICAL>;
 
- 	static constexpr std::array<const uint32_t, 39> reg_bit_widths{
+    static constexpr std::array<const uint32_t, 38> 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}};
+        {32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,8,32,32,64}};
 
-    static constexpr std::array<const uint32_t, 40> reg_byte_offsets{
+    static constexpr std::array<const uint32_t, 38> 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}};
+        {0,4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68,72,76,80,84,88,92,96,100,104,108,112,116,120,124,128,132,136,137,141,145}};
 
     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 };
+    
+    enum class opcode_e : unsigned short {
+        LUI = 0,
+        AUIPC = 1,
+        JAL = 2,
+        JALR = 3,
+        BEQ = 4,
+        BNE = 5,
+        BLT = 6,
+        BGE = 7,
+        BLTU = 8,
+        BGEU = 9,
+        LB = 10,
+        LH = 11,
+        LW = 12,
+        LBU = 13,
+        LHU = 14,
+        SB = 15,
+        SH = 16,
+        SW = 17,
+        ADDI = 18,
+        SLTI = 19,
+        SLTIU = 20,
+        XORI = 21,
+        ORI = 22,
+        ANDI = 23,
+        SLLI = 24,
+        SRLI = 25,
+        SRAI = 26,
+        ADD = 27,
+        SUB = 28,
+        SLL = 29,
+        SLT = 30,
+        SLTU = 31,
+        XOR = 32,
+        SRL = 33,
+        SRA = 34,
+        OR = 35,
+        AND = 36,
+        FENCE = 37,
+        FENCE_I = 38,
+        ECALL = 39,
+        EBREAK = 40,
+        URET = 41,
+        SRET = 42,
+        MRET = 43,
+        WFI = 44,
+        SFENCE_VMA = 45,
+        CSRRW = 46,
+        CSRRS = 47,
+        CSRRC = 48,
+        CSRRWI = 49,
+        CSRRSI = 50,
+        CSRRCI = 51,
+        MUL = 52,
+        MULH = 53,
+        MULHSU = 54,
+        MULHU = 55,
+        DIV = 56,
+        DIVU = 57,
+        REM = 58,
+        REMU = 59,
+        CADDI4SPN = 60,
+        CLW = 61,
+        CSW = 62,
+        CADDI = 63,
+        CNOP = 64,
+        CJAL = 65,
+        CLI = 66,
+        CLUI = 67,
+        CADDI16SP = 68,
+        CSRLI = 69,
+        CSRAI = 70,
+        CANDI = 71,
+        CSUB = 72,
+        CXOR = 73,
+        COR = 74,
+        CAND = 75,
+        CJ = 76,
+        CBEQZ = 77,
+        CBNEZ = 78,
+        CSLLI = 79,
+        CLWSP = 80,
+        CMV = 81,
+        CJR = 82,
+        CADD = 83,
+        CJALR = 84,
+        CEBREAK = 85,
+        CSWSP = 86,
+        DII = 87,
+        MAX_OPCODE
+    };
 };
 
 struct tgf_c: public arch_if {
@@ -199,51 +222,54 @@ struct tgf_c: public arch_if {
     inline uint32_t get_last_branch() { return reg.last_branch; }
 
 protected:
-    struct TGF_C_regs {
+#pragma pack(push, 1)
-        uint32_t X0 = 0;
+    struct TGF_C_regs { 
-        uint32_t X1 = 0;
+        uint32_t X0 = 0; 
-        uint32_t X2 = 0;
+        uint32_t X1 = 0; 
-        uint32_t X3 = 0;
+        uint32_t X2 = 0; 
-        uint32_t X4 = 0;
+        uint32_t X3 = 0; 
-        uint32_t X5 = 0;
+        uint32_t X4 = 0; 
-        uint32_t X6 = 0;
+        uint32_t X5 = 0; 
-        uint32_t X7 = 0;
+        uint32_t X6 = 0; 
-        uint32_t X8 = 0;
+        uint32_t X7 = 0; 
-        uint32_t X9 = 0;
+        uint32_t X8 = 0; 
-        uint32_t X10 = 0;
+        uint32_t X9 = 0; 
-        uint32_t X11 = 0;
+        uint32_t X10 = 0; 
-        uint32_t X12 = 0;
+        uint32_t X11 = 0; 
-        uint32_t X13 = 0;
+        uint32_t X12 = 0; 
-        uint32_t X14 = 0;
+        uint32_t X13 = 0; 
-        uint32_t X15 = 0;
+        uint32_t X14 = 0; 
-        uint32_t X16 = 0;
+        uint32_t X15 = 0; 
-        uint32_t X17 = 0;
+        uint32_t X16 = 0; 
-        uint32_t X18 = 0;
+        uint32_t X17 = 0; 
-        uint32_t X19 = 0;
+        uint32_t X18 = 0; 
-        uint32_t X20 = 0;
+        uint32_t X19 = 0; 
-        uint32_t X21 = 0;
+        uint32_t X20 = 0; 
-        uint32_t X22 = 0;
+        uint32_t X21 = 0; 
-        uint32_t X23 = 0;
+        uint32_t X22 = 0; 
-        uint32_t X24 = 0;
+        uint32_t X23 = 0; 
-        uint32_t X25 = 0;
+        uint32_t X24 = 0; 
-        uint32_t X26 = 0;
+        uint32_t X25 = 0; 
-        uint32_t X27 = 0;
+        uint32_t X26 = 0; 
-        uint32_t X28 = 0;
+        uint32_t X27 = 0; 
-        uint32_t X29 = 0;
+        uint32_t X28 = 0; 
-        uint32_t X30 = 0;
+        uint32_t X29 = 0; 
-        uint32_t X31 = 0;
+        uint32_t X30 = 0; 
-        uint32_t PC = 0;
+        uint32_t X31 = 0; 
-        uint32_t NEXT_PC = 0;
+        uint32_t PC = 0; 
-        uint32_t trap_state = 0, pending_trap = 0, machine_state = 0, last_branch = 0;
+        uint32_t NEXT_PC = 0; 
+        uint8_t PRIV = 0;
+        uint32_t trap_state = 0, pending_trap = 0;
         uint64_t icount = 0;
+        uint32_t last_branch;
     } reg;
-
+#pragma pack(pop)
     std::array<address_type, 4> addr_mode;
     
     uint64_t interrupt_sim=0;
 
-	uint32_t get_fcsr(){return 0;}
+    uint32_t get_fcsr(){return 0;}
-	void set_fcsr(uint32_t val){}
+    void set_fcsr(uint32_t val){}
 
 };
 

incl/iss/plugin/cycle_estimate.h

@@ -76,7 +76,7 @@ public:
 
     sync_type get_sync() override { return POST_SYNC; };
 
-    void callback(instr_info_t instr_info) override;
+    void callback(instr_info_t instr_info, exec_info const&) override;
 
 private:
     iss::instrumentation_if *arch_instr;

incl/iss/plugin/instruction_count.h

@@ -69,7 +69,7 @@ public:
 
     sync_type get_sync() override { return POST_SYNC; };
 
-    void callback(instr_info_t instr_info) override;
+    void callback(instr_info_t, exec_info const&) override;
 
 private:
     Json::Value root;

src/iss/.gitignore

@@ -0,0 +1 @@
+/tgf_b.cpp

src/iss/tgf_c.cpp

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (C) 2017, 2018 MINRES Technologies GmbH
+ * Copyright (C) 2017 - 2020 MINRES Technologies GmbH
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -29,7 +29,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  *
  *******************************************************************************/
- 
+
 #include "util/ities.h"
 #include <util/logging.h>
 #include <iss/arch/tgf_c.h>
@@ -39,10 +39,10 @@
 
 using namespace iss::arch;
 
-constexpr std::array<const char*, 33>    iss::arch::traits<iss::arch::tgf_c>::reg_names;
+constexpr std::array<const char*, 35>    iss::arch::traits<iss::arch::tgf_c>::reg_names;
-constexpr std::array<const char*, 33>    iss::arch::traits<iss::arch::tgf_c>::reg_aliases;
+constexpr std::array<const char*, 35>    iss::arch::traits<iss::arch::tgf_c>::reg_aliases;
-constexpr std::array<const uint32_t, 39> iss::arch::traits<iss::arch::tgf_c>::reg_bit_widths;
+constexpr std::array<const uint32_t, 38> iss::arch::traits<iss::arch::tgf_c>::reg_bit_widths;
-constexpr std::array<const uint32_t, 40> iss::arch::traits<iss::arch::tgf_c>::reg_byte_offsets;
+constexpr std::array<const uint32_t, 38> iss::arch::traits<iss::arch::tgf_c>::reg_byte_offsets;
 
 tgf_c::tgf_c() {
     reg.icount = 0;
@@ -54,8 +54,8 @@ void tgf_c::reset(uint64_t address) {
     for(size_t i=0; i<traits<tgf_c>::NUM_REGS; ++i) set_reg(i, std::vector<uint8_t>(sizeof(traits<tgf_c>::reg_t),0));
     reg.PC=address;
     reg.NEXT_PC=reg.PC;
+    reg.PRIV=0x3;
     reg.trap_state=0;
-    reg.machine_state=0x3;
     reg.icount=0;
 }
 

src/main.cpp

@@ -36,7 +36,9 @@
 #include <boost/lexical_cast.hpp>
 #include <boost/program_options.hpp>
 #include <iss/arch/riscv_hart_m_p.h>
+#ifdef WITH_TGF_B
 #include <iss/arch/tgf_b.h>
+#endif
 #include <iss/arch/tgf_c.h>
 #ifdef WITH_LLVM
 #include <iss/llvm/jit_helper.h>
@@ -59,8 +61,8 @@ std::tuple<cpu_ptr, vm_ptr> create_cpu(std::string const& backend, unsigned gdb_
     if(backend == "llvm")
         return {cpu_ptr{lcpu}, vm_ptr{iss::llvm::create(lcpu, gdb_port)}};
 #endif
-    if(backend == "tcc")
+//    if(backend == "tcc")
-        return {cpu_ptr{lcpu}, vm_ptr{iss::tcc::create(lcpu, gdb_port)}};
+//        return {cpu_ptr{lcpu}, vm_ptr{iss::tcc::create(lcpu, gdb_port)}};
     return {nullptr, nullptr};
 }
 
@@ -83,7 +85,7 @@ int main(int argc, char *argv[]) {
         ("elf", po::value<std::vector<std::string>>(), "ELF file(s) to load")
         ("mem,m", po::value<std::string>(), "the memory input file")
         ("plugin,p", po::value<std::vector<std::string>>(), "plugin to activate")
-        ("backend", po::value<std::string>()->default_value("tcc"), "the memory input file")
+        ("backend", po::value<std::string>()->default_value("interp"), "the memory input file")
         ("isa", po::value<std::string>()->default_value("tgf_c"), "isa to use for simulation");
     // clang-format on
     auto parsed = po::command_line_parser(argc, argv).options(desc).allow_unregistered().run();
@@ -129,10 +131,13 @@ int main(int argc, char *argv[]) {
         vm_ptr vm{nullptr};
         cpu_ptr cpu{nullptr};
         std::string isa_opt(clim["isa"].as<std::string>());
+#ifdef WITH_TGF_B
         if (isa_opt == "tgf_b") {
             std::tie(cpu, vm) =
                 create_cpu<iss::arch::tgf_b>(clim["backend"].as<std::string>(), clim["gdb-port"].as<unsigned>());
-        } else if (isa_opt == "tgf_c") {
+        } else
+#endif
+            if (isa_opt == "tgf_c") {
             std::tie(cpu, vm) =
                 create_cpu<iss::arch::tgf_c>(clim["backend"].as<std::string>(), clim["gdb-port"].as<unsigned>());
         } else {
@@ -174,7 +179,7 @@ int main(int argc, char *argv[]) {
         }
         uint64_t start_address = 0;
         if (clim.count("mem"))
-            vm->get_arch()->load_file(clim["mem"].as<std::string>(), iss::arch::traits<iss::arch::tgf_b>::MEM);
+            vm->get_arch()->load_file(clim["mem"].as<std::string>(), iss::arch::traits<iss::arch::tgf_c>::MEM);
         if (clim.count("elf"))
             for (std::string input : clim["elf"].as<std::vector<std::string>>()) {
                 auto start_addr = vm->get_arch()->load_file(input);

src/plugin/cycle_estimate.cpp

@@ -83,7 +83,7 @@ bool iss::plugin::cycle_estimate::registration(const char* const version, vm_if&
 
 }
 
-void iss::plugin::cycle_estimate::callback(instr_info_t instr_info) {
+void iss::plugin::cycle_estimate::callback(instr_info_t instr_info, exec_info const&) {
     assert(arch_instr && "No instrumentation interface available but callback executed");
 	auto entry = delays[instr_info.instr_id];
 	bool taken = (arch_instr->get_next_pc()-arch_instr->get_pc()) != (entry.size/8);

src/plugin/instruction_count.cpp

@@ -90,6 +90,6 @@ bool iss::plugin::instruction_count::registration(const char* const version, vm_
 	return true;
 }
 
-void iss::plugin::instruction_count::callback(instr_info_t instr_info) {
+void iss::plugin::instruction_count::callback(instr_info_t instr_info, exec_info const&) {
 	rep_counts[instr_info.instr_id]++;
 }

src/sysc/core_complex.cpp

@@ -96,7 +96,7 @@ public:
     core_wrapper(core_complex *owner)
     : owner(owner) { }
 
-    uint32_t get_mode() { return this->reg.machine_state; }
+    uint32_t get_mode() { return this->reg.PRIV; }
 
     inline void set_interrupt_execution(bool v) { this->interrupt_sim = v?1:0; }
 
@@ -113,7 +113,7 @@ public:
     void disass_output(uint64_t pc, const std::string instr) override {
         if (INFO <= Log<Output2FILE<disass>>::reporting_level() && Output2FILE<disass>::stream()) {
             std::stringstream s;
-            s << "[p:" << lvl[this->reg.machine_state] << ";s:0x" << std::hex << std::setfill('0')
+            s << "[p:" << lvl[this->reg.PRIV] << ";s:0x" << std::hex << std::setfill('0')
               << std::setw(sizeof(reg_t) * 2) << (reg_t)state.mstatus << std::dec << ";c:" << this->reg.icount << "]";
             Log<Output2FILE<disass>>().get(INFO, "disass")
                 << "0x" << std::setw(16) << std::right << std::setfill('0') << std::hex << pc << "\t\t" << std::setw(40)
@@ -277,8 +277,10 @@ vm_ptr create_cpu(core_wrapper* cpu, std::string const& backend, unsigned gdb_po
     if(backend == "llvm")
         return vm_ptr{iss::llvm::create(lcpu, gdb_port)};
 #endif
+#ifdef WITH_TCC
     if(backend == "tcc")
         return vm_ptr{iss::tcc::create<core_type>(cpu, gdb_port)};
+#endif
     return {nullptr};
 }
 
@@ -331,7 +333,7 @@ void core_complex::disass_output(uint64_t pc, const std::string instr_str) {
     tr_handle.record_attribute("PC", pc);
     tr_handle.record_attribute("INSTR", instr_str);
     tr_handle.record_attribute("MODE", lvl[cpu->get_mode()]);
-    tr_handle.record_attribute("MSTATUS", cpu->get_state().mstatus.st.value);
+    tr_handle.record_attribute("MSTATUS", cpu->get_state().mstatus.backing.val);
     tr_handle.record_attribute("LTIME_START", quantum_keeper.get_current_time().value() / 1000);
 #endif
 }

src/vm/interp/.gitignore

@@ -0,0 +1 @@
+/vm_tgf_b.cpp

src/vm/tcc/vm_tgf_b.cpp

@@ -377,7 +377,6 @@ private:
         auto is_cont_v = tu.choose(
             tu.icmp(ICmpInst::ICMP_NE, tu.ext(PC_val_v, 32U, true), tu.constant(pc.val, 32U)),
             tu.constant(0U, 32), tu.constant(1U, 32));
-        tu.store(is_cont_v, traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 2);
         gen_trap_check(tu);
@@ -424,7 +423,6 @@ private:
             new_pc_val,
             tu.l_not(tu.constant(0x1, 32U))), 32);
         tu.store(PC_val_v, traits<ARCH>::NEXT_PC);
-        tu.store(tu.constant(std::numeric_limits<uint32_t>::max(), 32U), traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 3);
@@ -466,7 +464,6 @@ private:
         auto is_cont_v = tu.choose(
             tu.icmp(ICmpInst::ICMP_NE, tu.ext(PC_val_v, 32U, true), tu.constant(pc.val, 32U)),
             tu.constant(0U, 32), tu.constant(1U, 32));
-        tu.store(is_cont_v, traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 4);
         gen_trap_check(tu);
@@ -507,7 +504,6 @@ private:
         auto is_cont_v = tu.choose(
             tu.icmp(ICmpInst::ICMP_NE, tu.ext(PC_val_v, 32U, true), tu.constant(pc.val, 32U)),
             tu.constant(0U, 32), tu.constant(1U, 32));
-        tu.store(is_cont_v, traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 5);
         gen_trap_check(tu);
@@ -552,7 +548,6 @@ private:
         auto is_cont_v = tu.choose(
             tu.icmp(ICmpInst::ICMP_NE, tu.ext(PC_val_v, 32U, true), tu.constant(pc.val, 32U)),
             tu.constant(0U, 32), tu.constant(1U, 32));
-        tu.store(is_cont_v, traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 6);
         gen_trap_check(tu);
@@ -597,7 +592,6 @@ private:
         auto is_cont_v = tu.choose(
             tu.icmp(ICmpInst::ICMP_NE, tu.ext(PC_val_v, 32U, true), tu.constant(pc.val, 32U)),
             tu.constant(0U, 32), tu.constant(1U, 32));
-        tu.store(is_cont_v, traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 7);
         gen_trap_check(tu);
@@ -638,7 +632,6 @@ private:
         auto is_cont_v = tu.choose(
             tu.icmp(ICmpInst::ICMP_NE, tu.ext(PC_val_v, 32U, true), tu.constant(pc.val, 32U)),
             tu.constant(0U, 32), tu.constant(1U, 32));
-        tu.store(is_cont_v, traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 8);
         gen_trap_check(tu);
@@ -679,7 +672,6 @@ private:
         auto is_cont_v = tu.choose(
             tu.icmp(ICmpInst::ICMP_NE, tu.ext(PC_val_v, 32U, true), tu.constant(pc.val, 32U)),
             tu.constant(0U, 32), tu.constant(1U, 32));
-        tu.store(is_cont_v, traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 9);
         gen_trap_check(tu);
@@ -1621,7 +1613,6 @@ private:
             tu.constant(1, 64U),
             tu.trunc(tu.constant(imm, 32U), 32));
         tu.close_scope();
-        tu.store(tu.constant(std::numeric_limits<uint32_t>::max(), 32),traits<ARCH>::LAST_BRANCH);
         gen_set_pc(tu, pc, traits<ARCH>::NEXT_PC);
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 38);
         gen_trap_check(tu);
@@ -2055,13 +2046,11 @@ vm_impl<ARCH>::gen_single_inst_behavior(virt_addr_t &pc, unsigned int &inst_cnt,
 
 template <typename ARCH> void vm_impl<ARCH>::gen_raise_trap(tu_builder& tu, uint16_t trap_id, uint16_t cause) {
     tu("  *trap_state = {:#x};", 0x80 << 24 | (cause << 16) | trap_id);
-    tu.store(tu.constant(std::numeric_limits<uint32_t>::max(), 32),traits<ARCH>::LAST_BRANCH);
 }
 
 template <typename ARCH> void vm_impl<ARCH>::gen_leave_trap(tu_builder& tu, unsigned lvl) {
     tu("leave_trap(core_ptr, {});", lvl);
     tu.store(tu.read_mem(traits<ARCH>::CSR, (lvl << 8) + 0x41, traits<ARCH>::XLEN),traits<ARCH>::NEXT_PC);
-    tu.store(tu.constant(std::numeric_limits<uint32_t>::max(), 32),traits<ARCH>::LAST_BRANCH);
 }
 
 template <typename ARCH> void vm_impl<ARCH>::gen_wait(tu_builder& tu, unsigned type) {
@@ -2070,7 +2059,6 @@ template <typename ARCH> void vm_impl<ARCH>::gen_wait(tu_builder& tu, unsigned t
 template <typename ARCH> void vm_impl<ARCH>::gen_trap_behavior(tu_builder& tu) {
     tu("trap_entry:");
     tu("enter_trap(core_ptr, *trap_state, *pc);");
-    tu.store(tu.constant(std::numeric_limits<uint32_t>::max(),32),traits<ARCH>::LAST_BRANCH);
     tu("return *next_pc;");
 }
 

src/vm/tcc/vm_tgf_c.cpp

@@ -449,7 +449,6 @@ private:
         auto is_cont_v = tu.choose(
             tu.icmp(ICmpInst::ICMP_NE, tu.ext(PC_val_v, 32U, true), tu.constant(pc.val, 32U)),
             tu.constant(0U, 32), tu.constant(1U, 32));
-        tu.store(is_cont_v, traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 2);
         gen_trap_check(tu);
@@ -487,7 +486,6 @@ private:
             new_pc_val,
             tu.l_not(tu.constant(0x1, 32U))), 32);
         tu.store(PC_val_v, traits<ARCH>::NEXT_PC);
-        tu.store(tu.constant(std::numeric_limits<uint32_t>::max(), 32U), traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 3);
         gen_trap_check(tu);
@@ -528,7 +526,6 @@ private:
         auto is_cont_v = tu.choose(
             tu.icmp(ICmpInst::ICMP_NE, tu.ext(PC_val_v, 32U, true), tu.constant(pc.val, 32U)),
             tu.constant(0U, 32), tu.constant(1U, 32));
-        tu.store(is_cont_v, traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 4);
         gen_trap_check(tu);
@@ -569,7 +566,6 @@ private:
         auto is_cont_v = tu.choose(
             tu.icmp(ICmpInst::ICMP_NE, tu.ext(PC_val_v, 32U, true), tu.constant(pc.val, 32U)),
             tu.constant(0U, 32), tu.constant(1U, 32));
-        tu.store(is_cont_v, traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 5);
         gen_trap_check(tu);
@@ -614,7 +610,6 @@ private:
         auto is_cont_v = tu.choose(
             tu.icmp(ICmpInst::ICMP_NE, tu.ext(PC_val_v, 32U, true), tu.constant(pc.val, 32U)),
             tu.constant(0U, 32), tu.constant(1U, 32));
-        tu.store(is_cont_v, traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 6);
         gen_trap_check(tu);
@@ -659,7 +654,6 @@ private:
         auto is_cont_v = tu.choose(
             tu.icmp(ICmpInst::ICMP_NE, tu.ext(PC_val_v, 32U, true), tu.constant(pc.val, 32U)),
             tu.constant(0U, 32), tu.constant(1U, 32));
-        tu.store(is_cont_v, traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 7);
         gen_trap_check(tu);
@@ -700,7 +694,6 @@ private:
         auto is_cont_v = tu.choose(
             tu.icmp(ICmpInst::ICMP_NE, tu.ext(PC_val_v, 32U, true), tu.constant(pc.val, 32U)),
             tu.constant(0U, 32), tu.constant(1U, 32));
-        tu.store(is_cont_v, traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 8);
         gen_trap_check(tu);
@@ -741,7 +734,6 @@ private:
         auto is_cont_v = tu.choose(
             tu.icmp(ICmpInst::ICMP_NE, tu.ext(PC_val_v, 32U, true), tu.constant(pc.val, 32U)),
             tu.constant(0U, 32), tu.constant(1U, 32));
-        tu.store(is_cont_v, traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 9);
         gen_trap_check(tu);
@@ -1683,7 +1675,6 @@ private:
             tu.constant(1, 64U),
             tu.trunc(tu.constant(imm, 32U), 32));
         tu.close_scope();
-        tu.store(tu.constant(std::numeric_limits<uint32_t>::max(), 32),traits<ARCH>::LAST_BRANCH);
         gen_set_pc(tu, pc, traits<ARCH>::NEXT_PC);
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 38);
         gen_trap_check(tu);
@@ -2562,7 +2553,6 @@ private:
         auto is_cont_v = tu.choose(
             tu.icmp(ICmpInst::ICMP_NE, tu.ext(PC_val_v, 32U, true), tu.constant(pc.val, 32U)),
             tu.constant(0U, 32), tu.constant(1U, 32));
-        tu.store(is_cont_v, traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 65);
         gen_trap_check(tu);
@@ -2868,7 +2858,6 @@ private:
         auto is_cont_v = tu.choose(
             tu.icmp(ICmpInst::ICMP_NE, tu.ext(PC_val_v, 32U, true), tu.constant(pc.val, 32U)),
             tu.constant(0U, 32), tu.constant(1U, 32));
-        tu.store(is_cont_v, traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 76);
         gen_trap_check(tu);
@@ -2908,7 +2897,6 @@ private:
         auto is_cont_v = tu.choose(
             tu.icmp(ICmpInst::ICMP_NE, tu.ext(PC_val_v, 32U, true), tu.constant(pc.val, 32U)),
             tu.constant(0U, 32), tu.constant(1U, 32));
-        tu.store(is_cont_v, traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 77);
         gen_trap_check(tu);
@@ -2948,7 +2936,6 @@ private:
         auto is_cont_v = tu.choose(
             tu.icmp(ICmpInst::ICMP_NE, tu.ext(PC_val_v, 32U, true), tu.constant(pc.val, 32U)),
             tu.constant(0U, 32), tu.constant(1U, 32));
-        tu.store(is_cont_v, traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 78);
         gen_trap_check(tu);
@@ -3055,7 +3042,6 @@ private:
         tu.open_scope();
         auto PC_val_v = tu.assignment("PC_val", tu.load(rs1 + traits<ARCH>::X0, 0), 32);
         tu.store(PC_val_v, traits<ARCH>::NEXT_PC);
-        tu.store(tu.constant(std::numeric_limits<uint32_t>::max(), 32U), traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 82);
         gen_trap_check(tu);
@@ -3108,7 +3094,6 @@ private:
             tu.constant(2, 32U)), 1 + traits<ARCH>::X0);
         auto PC_val_v = tu.assignment("PC_val", tu.load(rs1 + traits<ARCH>::X0, 0), 32);
         tu.store(PC_val_v, traits<ARCH>::NEXT_PC);
-        tu.store(tu.constant(std::numeric_limits<uint32_t>::max(), 32U), traits<ARCH>::LAST_BRANCH);
         tu.close_scope();
         vm_base<ARCH>::gen_sync(tu, POST_SYNC, 84);
         gen_trap_check(tu);
@@ -3247,13 +3232,11 @@ vm_impl<ARCH>::gen_single_inst_behavior(virt_addr_t &pc, unsigned int &inst_cnt,
 
 template <typename ARCH> void vm_impl<ARCH>::gen_raise_trap(tu_builder& tu, uint16_t trap_id, uint16_t cause) {
     tu("  *trap_state = {:#x};", 0x80 << 24 | (cause << 16) | trap_id);
-    tu.store(tu.constant(std::numeric_limits<uint32_t>::max(), 32),traits<ARCH>::LAST_BRANCH);
 }
 
 template <typename ARCH> void vm_impl<ARCH>::gen_leave_trap(tu_builder& tu, unsigned lvl) {
     tu("leave_trap(core_ptr, {});", lvl);
     tu.store(tu.read_mem(traits<ARCH>::CSR, (lvl << 8) + 0x41, traits<ARCH>::XLEN),traits<ARCH>::NEXT_PC);
-    tu.store(tu.constant(std::numeric_limits<uint32_t>::max(), 32),traits<ARCH>::LAST_BRANCH);
 }
 
 template <typename ARCH> void vm_impl<ARCH>::gen_wait(tu_builder& tu, unsigned type) {
@@ -3262,7 +3245,6 @@ template <typename ARCH> void vm_impl<ARCH>::gen_wait(tu_builder& tu, unsigned t
 template <typename ARCH> void vm_impl<ARCH>::gen_trap_behavior(tu_builder& tu) {
     tu("trap_entry:");
     tu("enter_trap(core_ptr, *trap_state, *pc);");
-    tu.store(tu.constant(std::numeric_limits<uint32_t>::max(),32),traits<ARCH>::LAST_BRANCH);
     tu("return *next_pc;");
 }