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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2016-08-20 19:50:45 +0200 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2016-08-20 19:50:45 +0200 |
| commit | 4dd9e35bfd35d3138bc44169baba098005bad51e (patch) | |
| tree | a4939c43a9c3fe00eb27f023e14acc5e1fe8808c /sysdeps/ieee754/dbl-64/s_asinh.c | |
| parent | bd42a4599d1b6f77bcfe1e4f67b7cbd9e1cb2dfd (diff) | |
| parent | f76453c31593957fec1a99b986bfa5506618b79c (diff) | |
Merge commit 'refs/top-bases/t/bigmem' into t/bigmem
Diffstat (limited to 'sysdeps/ieee754/dbl-64/s_asinh.c')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/s_asinh.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_asinh.c b/sysdeps/ieee754/dbl-64/s_asinh.c index 5500746848..ebe471015b 100644 --- a/sysdeps/ieee754/dbl-64/s_asinh.c +++ b/sysdeps/ieee754/dbl-64/s_asinh.c @@ -21,6 +21,7 @@ * := sign(x)*log1p(|x| + x^2/(1 + sqrt(1+x^2))) */ +#include <float.h> #include <math.h> #include <math_private.h> @@ -36,12 +37,17 @@ __asinh (double x) int32_t hx, ix; GET_HIGH_WORD (hx, x); ix = hx & 0x7fffffff; - if (__builtin_expect (ix < 0x3e300000, 0)) /* |x|<2**-28 */ + if (__glibc_unlikely (ix < 0x3e300000)) /* |x|<2**-28 */ { + if (fabs (x) < DBL_MIN) + { + double force_underflow = x * x; + math_force_eval (force_underflow); + } if (huge + x > one) return x; /* return x inexact except 0 */ } - if (__builtin_expect (ix > 0x41b00000, 0)) /* |x| > 2**28 */ + if (__glibc_unlikely (ix > 0x41b00000)) /* |x| > 2**28 */ { if (ix >= 0x7ff00000) return x + x; /* x is inf or NaN */ |