[turbofan] Support for %_DoubleHi, %_DoubleLo and %_ConstructDouble.

src/x64/macro-assembler-x64.cc

Index: src/x64/macro-assembler-x64.cc
diff --git a/src/x64/macro-assembler-x64.cc b/src/x64/macro-assembler-x64.cc
index 8e4448d46fceeacfd090b749d86e1e3b98c5a8f1..e4203618fcaa818bdb4441ac3345e3c4d43f0e4f 100644
--- a/src/x64/macro-assembler-x64.cc
+++ b/src/x64/macro-assembler-x64.cc
@@ -2832,6 +2832,59 @@ void MacroAssembler::Call(Handle<Code> code_object,
 }
 
 
+void MacroAssembler::Pextrd(Register dst, XMMRegister src, int8_t imm8) {
+  if (imm8 == 0) {
+    movd(dst, src);
+    return;
+  }
+  DCHECK_EQ(1, imm8);
+  if (CpuFeatures::IsSupported(SSE4_1)) {
+    CpuFeatureScope sse_scope(this, SSE4_1);
+    pextrd(dst, src, imm8);
+    return;
+  }
+  movq(dst, src);
+  shrq(dst, Immediate(32));
+}
+
+
+void MacroAssembler::Pinsrd(XMMRegister dst, Register src, int8_t imm8) {
+  if (CpuFeatures::IsSupported(SSE4_1)) {
+    CpuFeatureScope sse_scope(this, SSE4_1);
+    pinsrd(dst, src, imm8);
+    return;
+  }
+  movd(xmm0, src);
+  if (imm8 == 1) {
+    punpckldq(dst, xmm0);
+  } else {
+    DCHECK_EQ(0, imm8);
+    psrlq(dst, 32);
+    punpckldq(xmm0, dst);
+    movaps(dst, xmm0);
+  }
+}
+
+
+void MacroAssembler::Pinsrd(XMMRegister dst, const Operand& src, int8_t imm8) {
+  DCHECK(imm8 == 0 || imm8 == 1);
+  if (CpuFeatures::IsSupported(SSE4_1)) {
+    CpuFeatureScope sse_scope(this, SSE4_1);
+    pinsrd(dst, src, imm8);
+    return;
+  }
+  movd(xmm0, src);
+  if (imm8 == 1) {
+    punpckldq(dst, xmm0);
+  } else {
+    DCHECK_EQ(0, imm8);
+    psrlq(dst, 32);
+    punpckldq(xmm0, dst);
+    movaps(dst, xmm0);
+  }
+}
+
+
 void MacroAssembler::Pushad() {
   Push(rax);
   Push(rcx);