Revision: 15857
Author: [email protected]
Date: Wed Jul 24 05:17:45 2013
Log: More Math.abs tweaks for Intel platforms.
Made ia32/x64 code more uniform. Minor jump tweaks.
[email protected]
Review URL: https://codereview.chromium.org/20067003
http://code.google.com/p/v8/source/detail?r=15857
Modified:
/branches/bleeding_edge/src/ia32/lithium-codegen-ia32.cc
/branches/bleeding_edge/src/x64/lithium-codegen-x64.cc
=======================================
--- /branches/bleeding_edge/src/ia32/lithium-codegen-ia32.cc Wed Jul 24
03:48:16 2013
+++ /branches/bleeding_edge/src/ia32/lithium-codegen-ia32.cc Wed Jul 24
05:17:45 2013
@@ -3722,38 +3722,30 @@
factory()->heap_number_map());
DeoptimizeIf(not_equal, instr->environment());
- Label done;
+ Label slow, allocated, done;
Register tmp = input_reg.is(eax) ? ecx : eax;
Register tmp2 = tmp.is(ecx) ? edx : input_reg.is(ecx) ? edx : ecx;
// Preserve the value of all registers.
PushSafepointRegistersScope scope(this);
- Label negative;
__ mov(tmp, FieldOperand(input_reg, HeapNumber::kExponentOffset));
// Check the sign of the argument. If the argument is positive, just
// return it. We do not need to patch the stack since |input| and
// |result| are the same register and |input| will be restored
// unchanged by popping safepoint registers.
__ test(tmp, Immediate(HeapNumber::kSignMask));
- __ j(not_zero, &negative);
- __ jmp(&done);
+ __ j(zero, &done);
- __ bind(&negative);
-
- Label allocated, slow;
__ AllocateHeapNumber(tmp, tmp2, no_reg, &slow);
- __ jmp(&allocated);
+ __ jmp(&allocated, Label::kNear);
// Slow case: Call the runtime system to do the number allocation.
__ bind(&slow);
-
CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0,
instr, instr->context());
-
// Set the pointer to the new heap number in tmp.
if (!tmp.is(eax)) __ mov(tmp, eax);
-
// Restore input_reg after call to runtime.
__ LoadFromSafepointRegisterSlot(input_reg, input_reg);
@@ -3773,7 +3765,7 @@
Register input_reg = ToRegister(instr->value());
__ test(input_reg, Operand(input_reg));
Label is_positive;
- __ j(not_sign, &is_positive);
+ __ j(not_sign, &is_positive, Label::kNear);
__ neg(input_reg); // Sets flags.
DeoptimizeIf(negative, instr->environment());
__ bind(&is_positive);
=======================================
--- /branches/bleeding_edge/src/x64/lithium-codegen-x64.cc Wed Jul 24
03:48:16 2013
+++ /branches/bleeding_edge/src/x64/lithium-codegen-x64.cc Wed Jul 24
05:17:45 2013
@@ -3329,38 +3329,29 @@
Heap::kHeapNumberMapRootIndex);
DeoptimizeIf(not_equal, instr->environment());
- Label done;
+ Label slow, allocated, done;
Register tmp = input_reg.is(rax) ? rcx : rax;
Register tmp2 = tmp.is(rcx) ? rdx : input_reg.is(rcx) ? rdx : rcx;
// Preserve the value of all registers.
PushSafepointRegistersScope scope(this);
- Label negative;
__ movl(tmp, FieldOperand(input_reg, HeapNumber::kExponentOffset));
// Check the sign of the argument. If the argument is positive, just
// return it. We do not need to patch the stack since |input| and
// |result| are the same register and |input| will be restored
// unchanged by popping safepoint registers.
__ testl(tmp, Immediate(HeapNumber::kSignMask));
- __ j(not_zero, &negative);
- __ jmp(&done);
+ __ j(zero, &done);
- __ bind(&negative);
-
- Label allocated, slow;
__ AllocateHeapNumber(tmp, tmp2, &slow);
- __ jmp(&allocated);
+ __ jmp(&allocated, Label::kNear);
// Slow case: Call the runtime system to do the number allocation.
__ bind(&slow);
-
CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, instr);
// Set the pointer to the new heap number in tmp.
- if (!tmp.is(rax)) {
- __ movq(tmp, rax);
- }
-
+ if (!tmp.is(rax)) __ movq(tmp, rax);
// Restore input_reg after call to runtime.
__ LoadFromSafepointRegisterSlot(input_reg, input_reg);
@@ -3379,7 +3370,7 @@
Register input_reg = ToRegister(instr->value());
__ testl(input_reg, input_reg);
Label is_positive;
- __ j(not_sign, &is_positive);
+ __ j(not_sign, &is_positive, Label::kNear);
__ negl(input_reg); // Sets flags.
DeoptimizeIf(negative, instr->environment());
__ bind(&is_positive);
--
--
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