Add a utility method to the ia32 macro assembler to move a double immediate into an XMM register.

src/ia32/macro-assembler-ia32.cc

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@@ skipping 2829 matching lines @@
 }
 
 
 void MacroAssembler::Move(Register dst, Register src) {
   if (!dst.is(src)) {
     mov(dst, src);
   }
 }
 
 
 void MacroAssembler::Move(Register dst, Immediate imm) {

[Michael Starzinger, 2014/03/21 10:44:55]

As discussed offline: This method is a duplication of MacroAssembler::Set(). I
think we should unify the two. Even though Set() was here before, I prefer the
name Move(). But that is something for a follow-up CL.

   if (imm.is_zero()) {
     xor_(dst, dst);
   } else {
     mov(dst, imm);
   }
 }
 
 
+void MacroAssembler::Move(XMMRegister dst, double val) {
+  // TODO(titzer): recognize double constants with ExternalReferences.
+  CpuFeatureScope scope(this, SSE2);
+  uint64_t int_val = BitCast<uint64_t, double>(val);
+  if (int_val == 0) {
+    xorps(dst, dst);
+  } else {
+    int32_t lower = static_cast<int32_t>(int_val);
+    int32_t upper = static_cast<int32_t>(int_val >> kBitsPerInt);
+    push(Immediate(upper));
+    push(Immediate(lower));
+    movsd(dst, Operand(esp, 0));
+    add(esp, Immediate(kDoubleSize));
+  }
+}
+
+
 void MacroAssembler::SetCounter(StatsCounter* counter, int value) {
   if (FLAG_native_code_counters && counter->Enabled()) {
     mov(Operand::StaticVariable(ExternalReference(counter)), Immediate(value));
   }
 }
 
 
 void MacroAssembler::IncrementCounter(StatsCounter* counter, int value) {
   ASSERT(value > 0);
   if (FLAG_native_code_counters && counter->Enabled()) {
@@ skipping 769 matching lines @@
   if (ms.shift() > 0) sar(edx, ms.shift());
   mov(eax, dividend);
   shr(eax, 31);
   add(edx, eax);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32