diff --git a/gen_input/templates/llvm/CORENAME.cpp.gtl b/gen_input/templates/llvm/CORENAME.cpp.gtl
index 9c90f61..f362493 100644
--- a/gen_input/templates/llvm/CORENAME.cpp.gtl
+++ b/gen_input/templates/llvm/CORENAME.cpp.gtl
@@ -37,7 +37,9 @@
 #include <iss/llvm/vm_base.h>
 #include <util/logging.h>
 #include <iss/instruction_decoder.h>
-
+<%def fcsr = registers.find {it.name=='FCSR'}
+if(fcsr != null) {%>
+#include <vm/fp_functions.h><%}%>
 #ifndef FMT_HEADER_ONLY
 #define FMT_HEADER_ONLY
 #endif
@@ -83,7 +85,9 @@ protected:
     using vm_base<ARCH>::get_reg_ptr;
 
     inline const char *name(size_t index){return traits::reg_aliases.at(index);}
-
+<%if(fcsr != null) {%>
+    inline const char *fname(size_t index){return index < 32?name(index+traits::F0):"illegal";}   
+<%}%>
     template <typename T> inline ConstantInt *size(T type) {
         return ConstantInt::get(getContext(), APInt(32, type->getType()->getScalarSizeInBits()));
     }
@@ -130,8 +134,10 @@ protected:
         auto mask = (1ULL<<W) - 1;
         auto sign_mask = 1ULL<<(W-1);
         return (from & mask) | ((from & sign_mask) ? ~mask : 0);
-    }   
-
+    }
+<%functions.each{ it.eachLine { %>
+    ${it}<%}%>
+<%}%>
 private:
     /****************************************************************************
      * start opcode definitions
diff --git a/src/vm/llvm/vm_tgc5c.cpp b/src/vm/llvm/vm_tgc5c.cpp
index 4c8b91b..b928011 100644
--- a/src/vm/llvm/vm_tgc5c.cpp
+++ b/src/vm/llvm/vm_tgc5c.cpp
@@ -130,7 +130,7 @@ protected:
         auto mask = (1ULL<<W) - 1;
         auto sign_mask = 1ULL<<(W-1);
         return (from & mask) | ((from & sign_mask) ? ~mask : 0);
-    }   
+    }
 
 private:
     /****************************************************************************
@@ -516,6 +516,7 @@ private:
                    this->gen_ext(this->gen_const(32,addr_mask), 64,false))
                 ),
                 32, true);
+            {
             auto bb_merge = BasicBlock::Create(this->mod->getContext(), "bb_merge", this->func, this->leave_blk);
             auto bb_then = BasicBlock::Create(this->mod->getContext(), "bb_then", this->func, bb_merge);
             auto bb_else = BasicBlock::Create(this->mod->getContext(), "bb_else", this->func, bb_merge);
@@ -542,6 +543,7 @@ private:
             }
             this->builder.CreateBr(bb_merge);
             this->builder.SetInsertPoint(bb_merge);
+            }
         }
         bb = this->leave_blk;
         auto returnValue = std::make_tuple(BRANCH,nullptr);
@@ -585,6 +587,7 @@ private:
             this->gen_raise_trap(0, static_cast<int32_t>(traits::RV_CAUSE_ILLEGAL_INSTRUCTION));
         }
         else{
+            {
             auto bb_merge = BasicBlock::Create(this->mod->getContext(), "bb_merge", this->func, this->leave_blk);
             auto bb_then = BasicBlock::Create(this->mod->getContext(), "bb_then", this->func, bb_merge);
             this->builder.CreateCondBr(this->gen_bool(this->builder.CreateICmp(ICmpInst::ICMP_EQ,
@@ -605,6 +608,7 @@ private:
             }
             this->builder.CreateBr(bb_merge);
             this->builder.SetInsertPoint(bb_merge);
+            }
         }
         bb = this->leave_blk;
         auto returnValue = std::make_tuple(BRANCH,nullptr);
@@ -648,6 +652,7 @@ private:
             this->gen_raise_trap(0, static_cast<int32_t>(traits::RV_CAUSE_ILLEGAL_INSTRUCTION));
         }
         else{
+            {
             auto bb_merge = BasicBlock::Create(this->mod->getContext(), "bb_merge", this->func, this->leave_blk);
             auto bb_then = BasicBlock::Create(this->mod->getContext(), "bb_then", this->func, bb_merge);
             this->builder.CreateCondBr(this->gen_bool(this->builder.CreateICmp(ICmpInst::ICMP_NE,
@@ -668,6 +673,7 @@ private:
             }
             this->builder.CreateBr(bb_merge);
             this->builder.SetInsertPoint(bb_merge);
+            }
         }
         bb = this->leave_blk;
         auto returnValue = std::make_tuple(BRANCH,nullptr);
@@ -711,6 +717,7 @@ private:
             this->gen_raise_trap(0, static_cast<int32_t>(traits::RV_CAUSE_ILLEGAL_INSTRUCTION));
         }
         else{
+            {
             auto bb_merge = BasicBlock::Create(this->mod->getContext(), "bb_merge", this->func, this->leave_blk);
             auto bb_then = BasicBlock::Create(this->mod->getContext(), "bb_then", this->func, bb_merge);
             this->builder.CreateCondBr(this->gen_bool(this->builder.CreateICmp(ICmpInst::ICMP_SLT,
@@ -735,6 +742,7 @@ private:
             }
             this->builder.CreateBr(bb_merge);
             this->builder.SetInsertPoint(bb_merge);
+            }
         }
         bb = this->leave_blk;
         auto returnValue = std::make_tuple(BRANCH,nullptr);
@@ -778,6 +786,7 @@ private:
             this->gen_raise_trap(0, static_cast<int32_t>(traits::RV_CAUSE_ILLEGAL_INSTRUCTION));
         }
         else{
+            {
             auto bb_merge = BasicBlock::Create(this->mod->getContext(), "bb_merge", this->func, this->leave_blk);
             auto bb_then = BasicBlock::Create(this->mod->getContext(), "bb_then", this->func, bb_merge);
             this->builder.CreateCondBr(this->gen_bool(this->builder.CreateICmp(ICmpInst::ICMP_SGE,
@@ -802,6 +811,7 @@ private:
             }
             this->builder.CreateBr(bb_merge);
             this->builder.SetInsertPoint(bb_merge);
+            }
         }
         bb = this->leave_blk;
         auto returnValue = std::make_tuple(BRANCH,nullptr);
@@ -845,6 +855,7 @@ private:
             this->gen_raise_trap(0, static_cast<int32_t>(traits::RV_CAUSE_ILLEGAL_INSTRUCTION));
         }
         else{
+            {
             auto bb_merge = BasicBlock::Create(this->mod->getContext(), "bb_merge", this->func, this->leave_blk);
             auto bb_then = BasicBlock::Create(this->mod->getContext(), "bb_then", this->func, bb_merge);
             this->builder.CreateCondBr(this->gen_bool(this->builder.CreateICmp(ICmpInst::ICMP_ULT,
@@ -865,6 +876,7 @@ private:
             }
             this->builder.CreateBr(bb_merge);
             this->builder.SetInsertPoint(bb_merge);
+            }
         }
         bb = this->leave_blk;
         auto returnValue = std::make_tuple(BRANCH,nullptr);
@@ -908,6 +920,7 @@ private:
             this->gen_raise_trap(0, static_cast<int32_t>(traits::RV_CAUSE_ILLEGAL_INSTRUCTION));
         }
         else{
+            {
             auto bb_merge = BasicBlock::Create(this->mod->getContext(), "bb_merge", this->func, this->leave_blk);
             auto bb_then = BasicBlock::Create(this->mod->getContext(), "bb_then", this->func, bb_merge);
             this->builder.CreateCondBr(this->gen_bool(this->builder.CreateICmp(ICmpInst::ICMP_UGE,
@@ -928,6 +941,7 @@ private:
             }
             this->builder.CreateBr(bb_merge);
             this->builder.SetInsertPoint(bb_merge);
+            }
         }
         bb = this->leave_blk;
         auto returnValue = std::make_tuple(BRANCH,nullptr);
@@ -3184,7 +3198,8 @@ private:
                 this->gen_reg_load(traits::X0+ rs1), 32,true);
             auto divisor =this->gen_ext(
                 this->gen_reg_load(traits::X0+ rs2), 32,true);
-            if(rd!=0){ auto bb_merge = BasicBlock::Create(this->mod->getContext(), "bb_merge", this->func, this->leave_blk);
+            if(rd!=0){ {
+            auto bb_merge = BasicBlock::Create(this->mod->getContext(), "bb_merge", this->func, this->leave_blk);
             auto bb_then = BasicBlock::Create(this->mod->getContext(), "bb_then", this->func, bb_merge);
             auto bb_else = BasicBlock::Create(this->mod->getContext(), "bb_else", this->func, bb_merge);
             this->builder.CreateCondBr(this->gen_bool(this->builder.CreateICmp(ICmpInst::ICMP_NE,
@@ -3194,6 +3209,7 @@ private:
             this->builder.SetInsertPoint(bb_then);
             {
                 auto MMIN =((uint32_t)1)<<(static_cast<uint32_t>(traits::XLEN)-1);
+                {
                 auto bb_merge = BasicBlock::Create(this->mod->getContext(), "bb_merge", this->func, this->leave_blk);
                 auto bb_then = BasicBlock::Create(this->mod->getContext(), "bb_then", this->func, bb_merge);
                 auto bb_else = BasicBlock::Create(this->mod->getContext(), "bb_else", this->func, bb_merge);
@@ -3227,6 +3243,7 @@ private:
                 }
                 this->builder.CreateBr(bb_merge);
                 this->builder.SetInsertPoint(bb_merge);
+                }
             }
             this->builder.CreateBr(bb_merge);
             this->builder.SetInsertPoint(bb_else);
@@ -3238,6 +3255,7 @@ private:
             this->builder.CreateBr(bb_merge);
             this->builder.SetInsertPoint(bb_merge);
             }
+            }
         }
         bb = BasicBlock::Create(this->mod->getContext(), "entry", this->func, this->leave_blk);
         auto returnValue = std::make_tuple(CONT,bb);
@@ -3280,6 +3298,7 @@ private:
             this->gen_raise_trap(0, static_cast<int32_t>(traits::RV_CAUSE_ILLEGAL_INSTRUCTION));
         }
         else{
+            {
             auto bb_merge = BasicBlock::Create(this->mod->getContext(), "bb_merge", this->func, this->leave_blk);
             auto bb_then = BasicBlock::Create(this->mod->getContext(), "bb_then", this->func, bb_merge);
             auto bb_else = BasicBlock::Create(this->mod->getContext(), "bb_else", this->func, bb_merge);
@@ -3309,6 +3328,7 @@ private:
             }
             this->builder.CreateBr(bb_merge);
             this->builder.SetInsertPoint(bb_merge);
+            }
         }
         bb = BasicBlock::Create(this->mod->getContext(), "entry", this->func, this->leave_blk);
         auto returnValue = std::make_tuple(CONT,bb);
@@ -3351,6 +3371,7 @@ private:
             this->gen_raise_trap(0, static_cast<int32_t>(traits::RV_CAUSE_ILLEGAL_INSTRUCTION));
         }
         else{
+            {
             auto bb_merge = BasicBlock::Create(this->mod->getContext(), "bb_merge", this->func, this->leave_blk);
             auto bb_then = BasicBlock::Create(this->mod->getContext(), "bb_then", this->func, bb_merge);
             auto bb_else = BasicBlock::Create(this->mod->getContext(), "bb_else", this->func, bb_merge);
@@ -3361,6 +3382,7 @@ private:
             this->builder.SetInsertPoint(bb_then);
             {
                 auto MMIN =(uint32_t)1<<(static_cast<uint32_t>(traits::XLEN)-1);
+                {
                 auto bb_merge = BasicBlock::Create(this->mod->getContext(), "bb_merge", this->func, this->leave_blk);
                 auto bb_then = BasicBlock::Create(this->mod->getContext(), "bb_then", this->func, bb_merge);
                 auto bb_else = BasicBlock::Create(this->mod->getContext(), "bb_else", this->func, bb_merge);
@@ -3401,6 +3423,7 @@ private:
                 }
                 this->builder.CreateBr(bb_merge);
                 this->builder.SetInsertPoint(bb_merge);
+                }
             }
             this->builder.CreateBr(bb_merge);
             this->builder.SetInsertPoint(bb_else);
@@ -3413,6 +3436,7 @@ private:
             }
             this->builder.CreateBr(bb_merge);
             this->builder.SetInsertPoint(bb_merge);
+            }
         }
         bb = BasicBlock::Create(this->mod->getContext(), "entry", this->func, this->leave_blk);
         auto returnValue = std::make_tuple(CONT,bb);
@@ -3455,6 +3479,7 @@ private:
             this->gen_raise_trap(0, static_cast<int32_t>(traits::RV_CAUSE_ILLEGAL_INSTRUCTION));
         }
         else{
+            {
             auto bb_merge = BasicBlock::Create(this->mod->getContext(), "bb_merge", this->func, this->leave_blk);
             auto bb_then = BasicBlock::Create(this->mod->getContext(), "bb_then", this->func, bb_merge);
             auto bb_else = BasicBlock::Create(this->mod->getContext(), "bb_else", this->func, bb_merge);
@@ -3484,6 +3509,7 @@ private:
             }
             this->builder.CreateBr(bb_merge);
             this->builder.SetInsertPoint(bb_merge);
+            }
         }
         bb = BasicBlock::Create(this->mod->getContext(), "entry", this->func, this->leave_blk);
         auto returnValue = std::make_tuple(CONT,bb);
@@ -4324,6 +4350,7 @@ private:
         this->gen_instr_prologue();
         /*generate behavior*/
         this->builder.CreateStore(this->gen_const(32U, static_cast<int>(NO_JUMP)), get_reg_ptr(traits::LAST_BRANCH), false);
+        {
         auto bb_merge = BasicBlock::Create(this->mod->getContext(), "bb_merge", this->func, this->leave_blk);
         auto bb_then = BasicBlock::Create(this->mod->getContext(), "bb_then", this->func, bb_merge);
         this->builder.CreateCondBr(this->gen_bool(this->builder.CreateICmp(ICmpInst::ICMP_EQ,
@@ -4338,6 +4365,7 @@ private:
         }
         this->builder.CreateBr(bb_merge);
         this->builder.SetInsertPoint(bb_merge);
+        }
         bb = this->leave_blk;
         auto returnValue = std::make_tuple(BRANCH,nullptr);
         
@@ -4375,6 +4403,7 @@ private:
         this->gen_instr_prologue();
         /*generate behavior*/
         this->builder.CreateStore(this->gen_const(32U, static_cast<int>(NO_JUMP)), get_reg_ptr(traits::LAST_BRANCH), false);
+        {
         auto bb_merge = BasicBlock::Create(this->mod->getContext(), "bb_merge", this->func, this->leave_blk);
         auto bb_then = BasicBlock::Create(this->mod->getContext(), "bb_then", this->func, bb_merge);
         this->builder.CreateCondBr(this->gen_bool(this->builder.CreateICmp(ICmpInst::ICMP_NE,
@@ -4389,6 +4418,7 @@ private:
         }
         this->builder.CreateBr(bb_merge);
         this->builder.SetInsertPoint(bb_merge);
+        }
         bb = this->leave_blk;
         auto returnValue = std::make_tuple(BRANCH,nullptr);