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Speculative fix for computing Math.pow(2, -1074) on win32 where

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the overloaded pow(double, int) function from math.h produces the
wrong answer. 

TBR=whesse@chromium.org
Review URL: http://codereview.chromium.org/131022

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2214 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
kasperl@chromium.org 2009-06-18 05:47:31 +00:00
parent 529c3a0a9f
commit cbda639253
1 changed files with 3 additions and 1 deletions
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4
src/runtime.cc
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@ -4170,7 +4170,9 @@ static double powi(double x, int y) {
// internal precision in the pow() implementation would have
// given us a finite p. This happens very rarely.
double result = 1.0 / p;
return (result == 0 && isinf(p)) ? pow(x, y) : result;
return (result == 0 && isinf(p))
? pow(x, static_cast<double>(y)) // Avoid pow(double, int).
: result;
} else {
return p;
}