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newlib-cygwin
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Fix x close to 1, y between 2^31 and 2^64 

E.g. known errors:
x = 0x1.000002c5e2e99p+0, y = 0x1.c9eee35374af6p+31 had an error of 639
ULP and is now correctly rounded.
x = 0x1.fffffd2e3e669p-1, y = 0x1.344c9823eb66cp+32 had an error of 428
ULP and is now correctly rounded.
This commit is contained in:
Andoni Arregi 2023-04-12 17:34:43 +02:00 committed by Jeff Johnston
parent 5a961061de
commit e5a36e6af7
1 changed files with 2 additions and 2 deletions
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newlib/libm/math/e_pow.c
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@ -196,8 +196,8 @@ ivln2_l = 1.92596299112661746887e-08; /* 0x3E54AE0B, 0xF85DDF44 =1/ln2 tail*/
}
/* |y| is huge */
if(iy>0x41e00000) { /* if |y| > 2**31 */
if(iy>0x43f00000){ /* if |y| > 2**64, must o/uflow and y is an even integer */
if(iy>0x42000000) { /* if |y| > ~2**33 (does not regard mantissa) */
if(iy>0x43f00000){ /* if |y| > ~2**64, must o/uflow and y is an even integer */
if(ix<=0x3fefffff) return (hy<0)? __math_oflow(0):__math_uflow(0);
if(ix>=0x3ff00000) return (hy>0)? __math_oflow(0):__math_uflow(0);
}