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Fix comparison bug on ARM.

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Retrieves the result of VFP comparison from the VFP status register.

BUG=none
TEST=none

Patch by Martyn Capewell from ARM Ltd.

Review URL: http://codereview.chromium.org/6020014


git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6176 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
sgjesse@chromium.org 2011-01-05 12:06:32 +00:00
parent 0cd558a355
commit f5fb75ce09
1 changed files with 2 additions and 0 deletions
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2
src/arm/lithium-codegen-arm.cc
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@ -1077,6 +1077,7 @@ void LCodeGen::DoBranch(LBranch* instr) {
} else if (r.IsDouble()) {
DoubleRegister reg = ToDoubleRegister(instr->input());
__ vcmp(reg, 0.0);
__ vmrs(pc); // Move vector status bits to normal status bits.
EmitBranch(true_block, false_block, ne);
} else {
ASSERT(r.IsTagged());
@ -1114,6 +1115,7 @@ void LCodeGen::DoBranch(LBranch* instr) {
__ sub(ip, reg, Operand(kHeapObjectTag));
__ vldr(dbl_scratch, ip, HeapNumber::kValueOffset);
__ vcmp(dbl_scratch, 0.0);
__ vmrs(pc); // Move vector status bits to normal status bits.
__ b(eq, false_label);
__ b(true_label);