From f5fb75ce09505e0c9ed90f6f75cf36361294d718 Mon Sep 17 00:00:00 2001
From: "sgjesse@chromium.org"
 <sgjesse@chromium.org@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Date: Wed, 5 Jan 2011 12:06:32 +0000
Subject: [PATCH] Fix comparison bug on ARM. 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
---
 src/arm/lithium-codegen-arm.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index 711d0ca3c8..bac1db4de3 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -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);