diff options
Diffstat (limited to 'libc/math/s_fdim.c')
| -rw-r--r-- | libc/math/s_fdim.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/libc/math/s_fdim.c b/libc/math/s_fdim.c index 2f97948b2..f8fd80490 100644 --- a/libc/math/s_fdim.c +++ b/libc/math/s_fdim.c @@ -26,16 +26,16 @@ __fdim (double x, double y) int clsx = fpclassify (x); int clsy = fpclassify (y); - if (clsx == FP_NAN || clsy == FP_NAN - || (y < 0 && clsx == FP_INFINITE && clsy == FP_INFINITE)) - /* Raise invalid flag. */ + if (clsx == FP_NAN || clsy == FP_NAN) + /* Raise invalid flag for signaling but not quiet NaN. */ return x - y; if (x <= y) return 0.0; double r = x - y; - if (fpclassify (r) == FP_INFINITE) + if (fpclassify (r) == FP_INFINITE + && clsx != FP_INFINITE && clsy != FP_INFINITE) __set_errno (ERANGE); return r; |