[turbofan] Add new Float32Abs and Float64Abs operators.

src/compiler/x64/code-generator-x64.cc

Index: src/compiler/x64/code-generator-x64.cc
diff --git a/src/compiler/x64/code-generator-x64.cc b/src/compiler/x64/code-generator-x64.cc
index 98ec629b4d702ba2d8d033a34e830ec6b3cc2939..443f1b1efdd4676d601da77cc02c2f5e0971cc6a 100644
--- a/src/compiler/x64/code-generator-x64.cc
+++ b/src/compiler/x64/code-generator-x64.cc
@@ -726,6 +726,14 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
     case kSSEFloat32Div:
       ASSEMBLE_SSE_BINOP(divss);
       break;
+    case kSSEFloat32Abs: {
+      // TODO(bmeurer): Use RIP relative 128-bit constants.
+      // TODO(turbofan): Add AVX version with relaxed register constraints.
+      __ pcmpeqd(kScratchDoubleReg, kScratchDoubleReg);
+      __ psrlq(kScratchDoubleReg, 33);
+      __ andps(i.OutputDoubleRegister(), kScratchDoubleReg);
+      break;
+    }
     case kSSEFloat32Neg: {
       // TODO(bmeurer): Use RIP relative 128-bit constants.
       // TODO(turbofan): Add AVX version with relaxed register constraints.
@@ -799,6 +807,14 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
     case kSSEFloat64Min:
       ASSEMBLE_SSE_BINOP(minsd);
       break;
+    case kSSEFloat64Abs: {
+      // TODO(bmeurer): Use RIP relative 128-bit constants.
+      // TODO(turbofan): Add AVX version with relaxed register constraints.
+      __ pcmpeqd(kScratchDoubleReg, kScratchDoubleReg);
+      __ psrlq(kScratchDoubleReg, 1);
+      __ andpd(i.OutputDoubleRegister(), kScratchDoubleReg);
+      break;
+    }
     case kSSEFloat64Neg: {
       // TODO(bmeurer): Use RIP relative 128-bit constants.
       // TODO(turbofan): Add AVX version with relaxed register constraints.