BNOT instruction [Delivers #81700198]

10 years ago · dd75da2d3a
3 changed files with 19 additions and 7 deletions
--- a/evmcc/test/arith/arith_bnot.evm
+++ b/evmcc/test/arith/arith_bnot.evm
@ -0,0 +1 @@
+6201e2406000546000530960005460206000f2
--- a/evmcc/test/arith/arith_bnot.lll
+++ b/evmcc/test/arith/arith_bnot.lll
@ -0,0 +1,14 @@
+
+(asm 
+123456
+0
+MSTORE
+0
+MLOAD
+BNOT
+0
+MSTORE
+32
+0
+RETURN
+)
--- a/libevmjit/Compiler.cpp
+++ b/libevmjit/Compiler.cpp
@ -372,14 +372,11 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
 			break;
 		}

-		/*case Instruction::NEG:
+		case Instruction::BNOT:
 		{
-			auto top = stack.pop();
-			auto zero = Constant::get(0);
-			auto res = m_builder.CreateSub(zero, top);
-			stack.push(res);
-			break;
-		}*/
+			auto value = stack.pop();
+			auto ret = m_builder.CreateXor(value, llvm::APInt(256, -1, true), "bnot");
+		}

 		case Instruction::LT:
 		{