Revert "Introduce intrinsics for double values in Javascript."

src/x64/lithium-codegen-x64.cc

Index: src/x64/lithium-codegen-x64.cc
diff --git a/src/x64/lithium-codegen-x64.cc b/src/x64/lithium-codegen-x64.cc
index d6c2f979b0fdbd37a05e319c0962fa788f408ec2..3316c3ffa1f70a8912a3eb098333dbfc3f386d86 100644
--- a/src/x64/lithium-codegen-x64.cc
+++ b/src/x64/lithium-codegen-x64.cc
@@ -5058,30 +5058,6 @@ void LCodeGen::DoClampTToUint8(LClampTToUint8* instr) {
 }
 
 
-void LCodeGen::DoDoubleBits(LDoubleBits* instr) {
-  XMMRegister value_reg = ToDoubleRegister(instr->value());
-  Register result_reg = ToRegister(instr->result());
-  if (instr->hydrogen()->bits() == HDoubleBits::HIGH) {
-    __ movq(result_reg, value_reg);
-    __ shr(result_reg, Immediate(32));
-  } else {
-    __ movd(result_reg, value_reg);
-  }
-}
-
-
-void LCodeGen::DoConstructDouble(LConstructDouble* instr) {
-  Register hi_reg = ToRegister(instr->hi());
-  Register lo_reg = ToRegister(instr->lo());
-  XMMRegister result_reg = ToDoubleRegister(instr->result());
-  XMMRegister xmm_scratch = double_scratch0();
-  __ movd(result_reg, hi_reg);
-  __ psllq(result_reg, 32);
-  __ movd(xmm_scratch, lo_reg);
-  __ orps(result_reg, xmm_scratch);
-}
-
-
 void LCodeGen::DoAllocate(LAllocate* instr) {
   class DeferredAllocate V8_FINAL : public LDeferredCode {
    public: