Version 3.14.5
Killed off the SCons based build.
Added a faster API for creating v8::Integer objects.
Speeded up function deoptimization by avoiding quadratic pass over optimized function list. (Chromium issue 155270)
Always invoke the default Array.sort functions from builtin functions. (issue 2372)
Reverted recent CPU profiler changes because they broke --prof. (issue 2364)
Switched code flushing to use different JSFunction field. (issue 1609)
Performance and stability improvements on all platforms.
git-svn-id: http://v8.googlecode.com/svn/trunk@12787 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
diff --git a/src/x64/macro-assembler-x64.cc b/src/x64/macro-assembler-x64.cc
index 49849d8..7750674 100644
--- a/src/x64/macro-assembler-x64.cc
+++ b/src/x64/macro-assembler-x64.cc
@@ -2868,16 +2868,24 @@
void MacroAssembler::ClampDoubleToUint8(XMMRegister input_reg,
XMMRegister temp_xmm_reg,
- Register result_reg,
- Register temp_reg) {
+ Register result_reg) {
Label done;
- Set(result_reg, 0);
+ Label conv_failure;
xorps(temp_xmm_reg, temp_xmm_reg);
- ucomisd(input_reg, temp_xmm_reg);
- j(below, &done, Label::kNear);
cvtsd2si(result_reg, input_reg);
testl(result_reg, Immediate(0xFFFFFF00));
j(zero, &done, Label::kNear);
+ cmpl(result_reg, Immediate(0x80000000));
+ j(equal, &conv_failure, Label::kNear);
+ movl(result_reg, Immediate(0));
+ setcc(above, result_reg);
+ subl(result_reg, Immediate(1));
+ andl(result_reg, Immediate(255));
+ jmp(&done, Label::kNear);
+ bind(&conv_failure);
+ Set(result_reg, 0);
+ ucomisd(input_reg, temp_xmm_reg);
+ j(below, &done, Label::kNear);
Set(result_reg, 255);
bind(&done);
}
@@ -2905,28 +2913,7 @@
void MacroAssembler::LoadInstanceDescriptors(Register map,
Register descriptors) {
- Register temp = descriptors;
- movq(temp, FieldOperand(map, Map::kTransitionsOrBackPointerOffset));
-
- Label ok, fail, load_from_back_pointer;
- CheckMap(temp,
- isolate()->factory()->fixed_array_map(),
- &fail,
- DONT_DO_SMI_CHECK);
- movq(descriptors, FieldOperand(temp, TransitionArray::kDescriptorsOffset));
- jmp(&ok);
-
- bind(&fail);
- CompareRoot(temp, Heap::kUndefinedValueRootIndex);
- j(not_equal, &load_from_back_pointer, Label::kNear);
- Move(descriptors, isolate()->factory()->empty_descriptor_array());
- jmp(&ok);
-
- bind(&load_from_back_pointer);
- movq(temp, FieldOperand(temp, Map::kTransitionsOrBackPointerOffset));
- movq(descriptors, FieldOperand(temp, TransitionArray::kDescriptorsOffset));
-
- bind(&ok);
+ movq(descriptors, FieldOperand(map, Map::kDescriptorsOffset));
}