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| author | Andreas Schwab <schwab@linux-m68k.org> | 2012-05-25 11:57:33 +0200 |
|---|---|---|
| committer | Andreas Schwab <schwab@linux-m68k.org> | 2012-05-26 13:53:22 +0200 |
| commit | 25dbcb277a9dea5f241c0b888a30b9341310d941 (patch) | |
| tree | 74c7933f325f44fed6f2f15fd87c59fd4752be37 /sysdeps/ieee754/dbl-64/wordsize-64/s_logb.c | |
| parent | d81dcb356909937b0c8e9c69ff0be27f51aaa07a (diff) | |
| download | glibc-25dbcb277a9dea5f241c0b888a30b9341310d941.tar.gz glibc-25dbcb277a9dea5f241c0b888a30b9341310d941.tar.xz glibc-25dbcb277a9dea5f241c0b888a30b9341310d941.zip | |
Optimize handling of denormals in logb/logbf/logbl
Diffstat (limited to 'sysdeps/ieee754/dbl-64/wordsize-64/s_logb.c')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/wordsize-64/s_logb.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_logb.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_logb.c index 185dd05be3..40b8888130 100644 --- a/sysdeps/ieee754/dbl-64/wordsize-64/s_logb.c +++ b/sysdeps/ieee754/dbl-64/wordsize-64/s_logb.c @@ -36,8 +36,8 @@ __logb (double x) return x * x; if (__builtin_expect (ex == 0, 0)) { - int m = (ix == 0) ? 0 : __builtin_clzll (ix); - return -1022.0 + (double)(11 -m); + int m = __builtin_clzll (ix); + ex -= m - 12; } return (double) (ex - 1023); } |