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math: fix pow(0,-inf) to raise divbyzero flag

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Szabolcs Nagy 2013-08-15 10:08:45 +00:00
parent 1b77b9072f
commit f29fea00b5
2 changed files with 2 additions and 2 deletions
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2
src/math/pow.c
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@ -143,7 +143,7 @@ double pow(double x, double y)
return 1.0; return 1.0;
else if (ix >= 0x3ff00000) /* (|x|>1)**+-inf = inf,0 */ else if (ix >= 0x3ff00000) /* (|x|>1)**+-inf = inf,0 */
return hy >= 0 ? y : 0.0; return hy >= 0 ? y : 0.0;
else /* (|x|<1)**+-inf = 0,inf */ else if ((ix|lx) != 0) /* (|x|<1)**+-inf = 0,inf if x!=0 */
return hy >= 0 ? 0.0 : -y; return hy >= 0 ? 0.0 : -y;
} }
if (iy == 0x3ff00000) /* y is +-1 */ if (iy == 0x3ff00000) /* y is +-1 */

2
src/math/powf.c
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@ -90,7 +90,7 @@ float powf(float x, float y)
return 1.0f; return 1.0f;
else if (ix > 0x3f800000) /* (|x|>1)**+-inf = inf,0 */ else if (ix > 0x3f800000) /* (|x|>1)**+-inf = inf,0 */
return hy >= 0 ? y : 0.0f; return hy >= 0 ? y : 0.0f;
else /* (|x|<1)**+-inf = 0,inf */ else if (ix != 0) /* (|x|<1)**+-inf = 0,inf if x!=0 */
return hy >= 0 ? 0.0f: -y; return hy >= 0 ? 0.0f: -y;
} }
if (iy == 0x3f800000) /* y is +-1 */ if (iy == 0x3f800000) /* y is +-1 */