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| author | Joseph Myers <joseph@codesourcery.com> | 2015-09-15 17:24:23 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2015-09-15 17:24:23 +0000 |
| commit | 694aabefd2eb3a0e2c5624d7feb1d7310b2bdd8b (patch) | |
| tree | e53ee8681fc6863277423922a1832087a23c456d | |
| parent | 828bf6828b048b1482e95f84ca92e5fe0edcdc0c (diff) | |
| download | glibc-694aabefd2eb3a0e2c5624d7feb1d7310b2bdd8b.tar glibc-694aabefd2eb3a0e2c5624d7feb1d7310b2bdd8b.tar.gz glibc-694aabefd2eb3a0e2c5624d7feb1d7310b2bdd8b.tar.bz2 glibc-694aabefd2eb3a0e2c5624d7feb1d7310b2bdd8b.zip | |
Simplify hypotf infinity handling (bug 15918).
Bug 15918 points out that the handling of infinities in hypotf can be
simplified: it's enough to return the absolute value of the infinite
argument without first comparing it to the other argument and possibly
returning that other argument's absolute value. This patch makes that
cleanup (which should not change how hypotf behaves on any input).
Tested for x86_64.
[BZ #15918]
* sysdeps/ieee754/flt-32/e_hypotf.c (__ieee754_hypotf): Simplify
handling of cases where one argument is an infinity.
| -rw-r--r-- | ChangeLog | 4 | ||||
| -rw-r--r-- | NEWS | 12 | ||||
| -rw-r--r-- | sysdeps/ieee754/flt-32/e_hypotf.c | 12 |
3 files changed, 12 insertions, 16 deletions
@@ -1,5 +1,9 @@ 2015-09-15 Joseph Myers <joseph@codesourcery.com> + [BZ #15918] + * sysdeps/ieee754/flt-32/e_hypotf.c (__ieee754_hypotf): Simplify + handling of cases where one argument is an infinity. + [BZ #18875] [BZ #18966] * sysdeps/i386/fpu/e_exp10.S (dbl_min): New object. @@ -9,12 +9,12 @@ Version 2.23 * The following bugs are resolved with this release: - 2542, 2543, 2558, 2898, 14341, 14912, 15786, 16141, 16517, 16519, 16520, - 16521, 16734, 16973, 16985, 17787, 17905, 18084, 18086, 18240, 18265, - 18370, 18421, 18480, 18525, 18610, 18618, 18647, 18661, 18674, 18675, - 18681, 18757, 18778, 18781, 18787, 18789, 18790, 18795, 18796, 18820, - 18823, 18824, 18863, 18870, 18873, 18875, 18887, 18921, 18952, 18961, - 18966. + 2542, 2543, 2558, 2898, 14341, 14912, 15786, 15918, 16141, 16517, 16519, + 16520, 16521, 16734, 16973, 16985, 17787, 17905, 18084, 18086, 18240, + 18265, 18370, 18421, 18480, 18525, 18610, 18618, 18647, 18661, 18674, + 18675, 18681, 18757, 18778, 18781, 18787, 18789, 18790, 18795, 18796, + 18820, 18823, 18824, 18863, 18870, 18873, 18875, 18887, 18921, 18952, + 18961, 18966. * The obsolete header <regexp.h> has been removed. Programs that require this header must be updated to use <regex.h> instead. diff --git a/sysdeps/ieee754/flt-32/e_hypotf.c b/sysdeps/ieee754/flt-32/e_hypotf.c index 8f499b5fde..717b82e42f 100644 --- a/sysdeps/ieee754/flt-32/e_hypotf.c +++ b/sysdeps/ieee754/flt-32/e_hypotf.c @@ -27,17 +27,9 @@ __ieee754_hypotf(float x, float y) GET_FLOAT_WORD(hb,y); hb &= 0x7fffffff; if (ha == 0x7f800000) - { - if (x == y) - return fabsf(y); - return fabsf(x); - } + return fabsf(x); else if (hb == 0x7f800000) - { - if (x == y) - return fabsf(x); - return fabsf(y); - } + return fabsf(y); else if (ha > 0x7f800000 || hb > 0x7f800000) return fabsf(x) * fabsf(y); else if (ha == 0) |