X87: [x64][ia32] Add Support for the Float64Neg and Float32Neg turbofan operators.

src/compiler/x87/code-generator-x87.cc

Index: src/compiler/x87/code-generator-x87.cc
diff --git a/src/compiler/x87/code-generator-x87.cc b/src/compiler/x87/code-generator-x87.cc
index dcd85737da73f60f8c5b2c816909ccaeb51715cb..9b8b823be33beb2d5f76a603c40436a2251e0671 100644
--- a/src/compiler/x87/code-generator-x87.cc
+++ b/src/compiler/x87/code-generator-x87.cc
@@ -1179,6 +1179,16 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       __ lea(esp, Operand(esp, kFloatSize));
       break;
     }
+    case kX87Float32Neg: {
+      if (FLAG_debug_code && FLAG_enable_slow_asserts) {
+        __ VerifyX87StackDepth(1);
+      }
+      __ fstp(0);
+      __ fld_s(MemOperand(esp, 0));
+      __ fchs();
+      __ lea(esp, Operand(esp, kFloatSize));
+      break;
+    }
     case kX87Float32Round: {
       RoundingMode mode =
           static_cast<RoundingMode>(MiscField::decode(instr->opcode()));
@@ -1353,6 +1363,16 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       __ lea(esp, Operand(esp, kDoubleSize));
       break;
     }
+    case kX87Float64Neg: {
+      if (FLAG_debug_code && FLAG_enable_slow_asserts) {
+        __ VerifyX87StackDepth(1);
+      }
+      __ fstp(0);
+      __ fld_d(MemOperand(esp, 0));
+      __ fchs();
+      __ lea(esp, Operand(esp, kDoubleSize));
+      break;
+    }
     case kX87Int32ToFloat32: {
       InstructionOperand* input = instr->InputAt(0);
       DCHECK(input->IsRegister() || input->IsStackSlot());