AuroraMiddleware/v8
1
0
Fork 0
Code Issues 2 Pull Requests Releases Wiki Activity

Shorten FP register pops where possible.

Browse Source 
Review URL: http://codereview.chromium.org/8699004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10071 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
yangguo@chromium.org 2011-11-25 14:26:54 +00:00
parent d542a2fb75
commit f8cabc645a
3 changed files with 4 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
src/ia32/lithium-codegen-ia32.cc
View File

@ -3756,8 +3756,7 @@ void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr) {
__ cmp(Operand(input_reg), Immediate(kTooBigExponent));
__ j(less, &convert, Label::kNear);
// Pop FPU stack before deoptimizing.
__ ffree(0);
__ fincstp();
__ fstp(0);
DeoptimizeIf(no_condition, instr->environment());
// Reserve space for 64 bit answer.

3
src/ia32/macro-assembler-ia32.cc
View File

@ -540,8 +540,7 @@ void MacroAssembler::IsInstanceJSObjectType(Register map,
void MacroAssembler::FCmp() {
if (CpuFeatures::IsSupported(CMOV)) {
fucomip();
ffree(0);
fincstp();
fstp(0);
} else {
fucompp();
push(eax);

6
src/ia32/stub-cache-ia32.cc
View File

@ -3392,8 +3392,7 @@ void KeyedLoadStubCompiler::GenerateLoadExternalArray(
// If we fail allocation of the HeapNumber, we still have a value on
// top of the FPU stack. Remove it.
__ bind(&failed_allocation);
__ ffree();
__ fincstp();
__ fstp(0);
// Fall through to slow case.
// Slow case: Jump to runtime.
@ -3710,8 +3709,7 @@ void KeyedLoadStubCompiler::GenerateLoadFastDoubleElement(
// A value was pushed on the floating point stack before the allocation, if
// the allocation fails it needs to be removed.
if (!CpuFeatures::IsSupported(SSE2)) {
__ ffree();
__ fincstp();
__ fstp(0);
}
Handle<Code> slow_ic =
masm->isolate()->builtins()->KeyedLoadIC_Slow();