diff options
Diffstat (limited to 'newlib')
| -rw-r--r-- | newlib/libm/common/sf_pow.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/newlib/libm/common/sf_pow.c b/newlib/libm/common/sf_pow.c index f7b22b612..2946c611b 100644 --- a/newlib/libm/common/sf_pow.c +++ b/newlib/libm/common/sf_pow.c @@ -220,7 +220,17 @@ powf (float x, float y) { /* |y*log(x)| >= 126. */ if (ylogx > 0x1.fffffffd1d571p+6 * POWF_SCALE) + /* |x^y| > 0x1.ffffffp127. */ return __math_oflowf (sign_bias); + if (WANT_ROUNDING && WANT_ERRNO + && ylogx > 0x1.fffffffa3aae2p+6 * POWF_SCALE) + /* |x^y| > 0x1.fffffep127, check if we round away from 0. */ + if ((!sign_bias + && eval_as_float (1.0f + opt_barrier_float (0x1p-25f)) != 1.0f) + || (sign_bias + && eval_as_float (-1.0f - opt_barrier_float (0x1p-25f)) + != -1.0f)) + return __math_oflowf (sign_bias); if (ylogx <= -150.0 * POWF_SCALE) return __math_uflowf (sign_bias); #if WANT_ERRNO_UFLOW |