fixes compile issues from merge

src/iss/arch/tgc5c.cpp

@@ -63,7 +63,7 @@ uint8_t *tgc5c::get_regs_base_ptr() {
 	return reinterpret_cast<uint8_t*>(&reg);
 }
 
-tgc5c::phys_addr_t tgc5c::virt2phys(const iss::addr_t &pc) {
+tgc5c::phys_addr_t tgc5c::virt2phys(const iss::addr_t &addr) {
-    return phys_addr_t(pc); // change logical address to physical address
+    return phys_addr_t(addr.access, addr.space, addr.val&traits<tgc5c>::addr_mask);
 }
 

src/iss/arch/tgc5c.h

@@ -195,14 +195,6 @@ struct tgc5c: public arch_if {
 
     inline uint64_t stop_code() { return interrupt_sim; }
 
-    inline phys_addr_t v2p(const iss::addr_t& addr){
-        if (addr.space != traits<tgc5c>::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<tgc5c>::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; }

src/sysc/register_tgc_c.cpp

@@ -42,15 +42,15 @@ namespace iss {
 namespace interp {
 using namespace sysc;
 volatile std::array<bool, 2> tgc_init = {
-        core_factory::instance().register_creator("tgc5c|m_p|interp", [](unsigned gdb_port, void* data) -> std::tuple<cpu_ptr, vm_ptr>{
+        iss_factory::instance().register_creator("tgc5c|m_p|interp", [](unsigned gdb_port, void* data) -> iss_factory::base_t {
             auto cc = reinterpret_cast<sysc::tgfs::core_complex*>(data);
-            arch::tgc5c* cpu = new sc_core_adapter<arch::riscv_hart_m_p<arch::tgc5c>>(cc);
+            auto* cpu = new sc_core_adapter<arch::riscv_hart_m_p<arch::tgc5c>>(cc);
-            return {cpu_ptr{cpu}, vm_ptr{create(cpu, gdb_port)}};
+            return {sysc::sc_cpu_ptr{cpu}, vm_ptr{create(static_cast<arch::tgc5c*>(cpu), gdb_port)}};
         }),
-        core_factory::instance().register_creator("tgc5c|mu_p|interp", [](unsigned gdb_port, void* data) -> std::tuple<cpu_ptr, vm_ptr>{
+        iss_factory::instance().register_creator("tgc5c|mu_p|interp", [](unsigned gdb_port, void* data) -> iss_factory::base_t {
             auto cc = reinterpret_cast<sysc::tgfs::core_complex*>(data);
-            arch::tgc5c* cpu = new sc_core_adapter<arch::riscv_hart_mu_p<arch::tgc5c>>(cc);
+            auto* cpu = new sc_core_adapter<arch::riscv_hart_mu_p<arch::tgc5c>>(cc);
-            return {cpu_ptr{cpu}, vm_ptr{create(cpu, gdb_port)}};
+            return {sysc::sc_cpu_ptr{cpu}, vm_ptr{create(static_cast<arch::tgc5c*>(cpu), gdb_port)}};
         })
 };
 }
@@ -58,15 +58,15 @@ volatile std::array<bool, 2> tgc_init = {
 namespace tcc {
 using namespace sysc;
 volatile std::array<bool, 2> tgc_init = {
-        core_factory::instance().register_creator("tgc5c|m_p|tcc", [](unsigned gdb_port, void* data) -> std::tuple<cpu_ptr, vm_ptr>{
+        iss_factory::instance().register_creator("tgc5c|m_p|tcc", [](unsigned gdb_port, void* data) -> iss_factory::base_t {
             auto cc = reinterpret_cast<sysc::tgfs::core_complex*>(data);
-            arch::tgc5c* cpu = new sc_core_adapter<arch::riscv_hart_m_p<arch::tgc5c>>(cc);
+            auto* cpu = new sc_core_adapter<arch::riscv_hart_m_p<arch::tgc5c>>(cc);
-            return {cpu_ptr{cpu}, vm_ptr{create(cpu, gdb_port)}};
+            return {sysc::sc_cpu_ptr{cpu}, vm_ptr{create(static_cast<arch::tgc5c*>(cpu), gdb_port)}};
         }),
-        core_factory::instance().register_creator("tgc5c|mu_p|tcc", [](unsigned gdb_port, void* data) -> std::tuple<cpu_ptr, vm_ptr>{
+        iss_factory::instance().register_creator("tgc5c|mu_p|tcc", [](unsigned gdb_port, void* data) -> iss_factory::base_t {
             auto cc = reinterpret_cast<sysc::tgfs::core_complex*>(data);
-            arch::tgc5c* cpu = new sc_core_adapter<arch::riscv_hart_mu_p<arch::tgc5c>>(cc);
+            auto* cpu = new sc_core_adapter<arch::riscv_hart_mu_p<arch::tgc5c>>(cc);
-            return {cpu_ptr{cpu}, vm_ptr{create(cpu, gdb_port)}};
+            return {sysc::sc_cpu_ptr{cpu}, vm_ptr{create(static_cast<arch::tgc5c*>(cpu), gdb_port)}};
         })
 };
 }

src/vm/interp/vm_tgc5c.cpp

@@ -152,14 +152,22 @@ private:
     /****************************************************************************
      * start opcode definitions
      ****************************************************************************/
-    struct InstructionDesriptor {
+    struct instruction_descriptor {
         size_t length;
         uint32_t value;
         uint32_t mask;
         typename arch::traits<ARCH>::opcode_e op;
     };
+    struct decoding_tree_node{
+        std::vector<instruction_descriptor> instrs;
+        std::vector<decoding_tree_node*> children;
+        uint32_t submask = std::numeric_limits<uint32_t>::max();
+        uint32_t value;
+        decoding_tree_node(uint32_t value) : value(value){}
+    };
 
-    const std::array<InstructionDesriptor, 87> instr_descr = {{
+    decoding_tree_node* root {nullptr};
+    const std::array<instruction_descriptor, 87> instr_descr = {{
          /* entries are: size, valid value, valid mask, function ptr */
         {32, 0b00000000000000000000000000110111, 0b00000000000000000000000001111111, arch::traits<ARCH>::opcode_e::LUI},
         {32, 0b00000000000000000000000000010111, 0b00000000000000000000000001111111, arch::traits<ARCH>::opcode_e::AUIPC},
@@ -250,18 +258,76 @@ private:
         {16, 0b0000000000000000, 0b1111111111111111, arch::traits<ARCH>::opcode_e::DII},
     }};
 
-    //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(this->core.has_mmu()) {
-        //if ((pc.val & upper_bits) != ((pc.val + 2) & upper_bits)) { // we may cross a page boundary
+            auto phys_pc = this->core.virt2phys(pc);
-        //    if (this->core.read(phys_pc, 2, data) != iss::Ok) return iss::Err;
+//            if ((pc.val & upper_bits) != ((pc.val + 2) & upper_bits)) { // we may cross a page boundary
-        //    if ((data[0] & 0x3) == 0x3) // this is a 32bit instruction
+//                if (this->core.read(phys_pc, 2, data) != iss::Ok) return iss::Err;
-        //        if (this->core.read(this->core.v2p(pc + 2), 2, data + 2) != iss::Ok) return iss::Err;
+//                if ((data[0] & 0x3) == 0x3) // this is a 32bit instruction
-        //} else {
+//                    if (this->core.read(this->core.v2p(pc + 2), 2, data + 2) != iss::Ok)
-            if (this->core.read(phys_pc, 4, data) != iss::Ok)  return iss::Err;
+//                        return iss::Err;
-        //}
+//            } else {
+                if (this->core.read(phys_pc, 4, data) != iss::Ok)
+                    return iss::Err;
+//            }
+        } else {
+            if (this->core.read(phys_addr_t(pc.access, pc.space, pc.val), 4, data) != iss::Ok)
+                return iss::Err;
+
+        }
         return iss::Ok;
     }
+    
+    void populate_decoding_tree(decoding_tree_node* root){
+        //create submask
+        for(auto instr: root->instrs){
+            root->submask &= instr.mask;
+        }
+        //put each instr according to submask&encoding into children
+        for(auto instr: root->instrs){
+            bool foundMatch = false;
+            for(auto child: root->children){
+                //use value as identifying trait
+                if(child->value == (instr.value&root->submask)){
+                    child->instrs.push_back(instr);
+                    foundMatch = true;
+                }
+            }
+            if(!foundMatch){
+                decoding_tree_node* child = new decoding_tree_node(instr.value&root->submask);
+                child->instrs.push_back(instr);
+                root->children.push_back(child);
+            }
+        }
+        root->instrs.clear();
+        //call populate_decoding_tree for all children
+        if(root->children.size() >1)
+            for(auto child: root->children){
+                populate_decoding_tree(child);      
+            }
+        else{
+            //sort instrs by value of the mask, this works bc we want to have the least restrictive one last
+            std::sort(root->children[0]->instrs.begin(), root->children[0]->instrs.end(), [](const instruction_descriptor& instr1, const instruction_descriptor& instr2) {
+            return instr1.mask > instr2.mask;
+            }); 
+        }
+    }
+    typename arch::traits<ARCH>::opcode_e  decode_instr(decoding_tree_node* node, code_word_t word){
+        if(!node->children.size()){
+            if(node->instrs.size() == 1) return node->instrs[0].op;
+            for(auto instr : node->instrs){
+                if((instr.mask&word) == instr.value) return instr.op;
+            }
+        }
+        else{
+            for(auto child : node->children){
+                if (child->value == (node->submask&word)){
+                    return decode_instr(child, word);
+                }  
+            }  
+        }
+        return arch::traits<ARCH>::opcode_e::MAX_OPCODE;
+    }
 };
 
 template <typename CODE_WORD> void debug_fn(CODE_WORD insn) {
@@ -288,16 +354,11 @@ constexpr size_t bit_count(uint32_t u) {
 template <typename ARCH>
 vm_impl<ARCH>::vm_impl(ARCH &core, unsigned core_id, unsigned cluster_id)
 : vm_base<ARCH>(core, core_id, cluster_id) {
-    unsigned id=0;
+    root = new decoding_tree_node(std::numeric_limits<uint32_t>::max());
-    for (auto instr : instr_descr) {
+    for(auto instr:instr_descr){
-        auto quadrant = instr.value & 0x3;
+        root->instrs.push_back(instr);
-        qlut[quadrant].push_back(instruction_pattern{instr.value, instr.mask, instr.op});
-    }
-    for(auto& lut: qlut){
-        std::sort(std::begin(lut), std::end(lut), [](instruction_pattern const& a, instruction_pattern const& b){
-            return bit_count(a.mask) > bit_count(b.mask);
-        });
     }
+    populate_decoding_tree(root);
 }
 
 inline bool is_count_limit_enabled(finish_cond_e cond){
@@ -308,14 +369,6 @@ inline bool is_jump_to_self_enabled(finish_cond_e cond){
     return (cond & finish_cond_e::JUMP_TO_SELF) == finish_cond_e::JUMP_TO_SELF;
 }
 
-template <typename ARCH>
-typename arch::traits<ARCH>::opcode_e vm_impl<ARCH>::decode_inst_id(code_word_t instr){
-    for(auto& e: qlut[instr&0x3]){
-        if(!((instr&e.mask) ^ e.value )) return e.id;
-    }
-    return arch::traits<ARCH>::opcode_e::MAX_OPCODE;
-}
-
 template <typename ARCH>
 typename vm_base<ARCH>::virt_addr_t vm_impl<ARCH>::execute_inst(finish_cond_e cond, virt_addr_t start, uint64_t icount_limit){
     auto pc=start;
@@ -337,7 +390,7 @@ typename vm_base<ARCH>::virt_addr_t vm_impl<ARCH>::execute_inst(finish_cond_e co
         } else {
             if (is_jump_to_self_enabled(cond) &&
                     (instr == 0x0000006f || (instr&0xffff)==0xa001)) throw simulation_stopped(0); // 'J 0' or 'C.J 0'
-            auto inst_id = decode_inst_id(instr);
+            auto inst_id = decode_instr(root, instr);
             // pre execution stuff
              this->core.reg.last_branch = 0;
             if(this->sync_exec && PRE_SYNC) this->do_sync(PRE_SYNC, static_cast<unsigned>(inst_id));

src/vm/tcc/vm_tgc5c.cpp

@@ -3138,9 +3138,9 @@ private:
     }
 };
 
-template <typename CODE_WORD> void debug_fn(CODE_WORD insn) {
+template <typename CODE_WORD> void debug_fn(CODE_WORD instr) {
-    volatile CODE_WORD x = insn;
+    volatile CODE_WORD x = instr;
-    insn = 2 * x;
+    instr = 2 * x;
 }
 
 template <typename ARCH> vm_impl<ARCH>::vm_impl() { this(new ARCH()); }
@@ -3163,30 +3163,30 @@ std::tuple<continuation_e>
 vm_impl<ARCH>::gen_single_inst_behavior(virt_addr_t &pc, unsigned int &inst_cnt, tu_builder& tu) {
     // we fetch at max 4 byte, alignment is 2
     enum {TRAP_ID=1<<16};
-    code_word_t insn = 0;
+    code_word_t instr = 0;
-    // const typename traits::addr_t upper_bits = ~traits::PGMASK;
     phys_addr_t paddr(pc);
-    auto *const data = (uint8_t *)&insn;
+    if(this->core.has_mmu())
-    paddr = this->core.v2p(pc);
+        paddr = this->core.virt2phys(pc);
+    //TODO: re-add page handling
 //    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
+//        if ((instr & 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);
+        auto res = this->core.read(paddr, 4, reinterpret_cast<uint8_t*>(&instr));
         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'
+    if (instr == 0x0000006f || (instr&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 lut_val = extract_fields(instr);
-    auto f = qlut[insn & 0x3][lut_val];
+    auto f = qlut[instr & 0x3][lut_val];
     if (f == nullptr) {
         f = &this_class::illegal_intruction;
     }
-    return (this->*f)(pc, insn, tu);
+    return (this->*f)(pc, instr, tu);
 }
 
 template <typename ARCH> void vm_impl<ARCH>::gen_raise_trap(tu_builder& tu, uint16_t trap_id, uint16_t cause) {