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X64: Change wording of comments.

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Review URL: http://codereview.chromium.org/160381

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2583 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
whesse@chromium.org 2009-07-30 08:11:25 +00:00
parent d8563e4d1e
commit 027f8d11c7
1 changed files with 6 additions and 7 deletions
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13
src/x64/codegen-x64.cc
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@ -4976,14 +4976,14 @@ void CodeGenerator::LikelySmiBinaryOperation(Token::Value op,
// Complete the operation.
if (op == Token::DIV) {
// Check for negative zero result. If result is zero, and divisor
// is negative, return a floating point negative zero. The jump
// to non_zero_result is safe w.r.t. the frame.
// Check for negative zero result. If the result is zero, and the
// divisor is negative, return a floating point negative zero.
Label non_zero_result;
__ testl(left->reg(), left->reg());
__ j(not_zero, &non_zero_result);
__ testl(right->reg(), right->reg());
deferred->Branch(negative);
// The frame is identical on all paths reaching this label.
__ bind(&non_zero_result);
// Check for the corner case of dividing the most negative smi by
// -1. We cannot use the overflow flag, since it is not set by
@ -5003,15 +5003,14 @@ void CodeGenerator::LikelySmiBinaryOperation(Token::Value op,
frame_->Push(&quotient);
} else {
ASSERT(op == Token::MOD);
// Check for a negative zero result. If the result is zero, and
// the dividend is negative, return a floating point negative
// zero. The frame is unchanged between the jump to &non_zero_result
// and the target, so a Label can be used.
// Check for a negative zero result. If the result is zero, and the
// dividend is negative, return a floating point negative zero.
Label non_zero_result;
__ testl(rdx, rdx);
__ j(not_zero, &non_zero_result);
__ testl(left->reg(), left->reg());
deferred->Branch(negative);
// The frame is identical on all paths reaching this label.
__ bind(&non_zero_result);
deferred->BindExit();
left->Unuse();