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| author | Joseph Myers <joseph@codesourcery.com> | 2016-06-06 22:21:11 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2016-06-06 22:21:11 +0000 |
| commit | 3d8b06bc6108aa20a6591f52e7d9cbbd63c20e0a (patch) | |
| tree | 4d39272f31ecc39b6e42fa8179a4b1c8591502c2 | |
| parent | af5fdf5a358329161cc3960f5e54fac16dbb8063 (diff) | |
| download | glibc-3d8b06bc6108aa20a6591f52e7d9cbbd63c20e0a.tar.gz glibc-3d8b06bc6108aa20a6591f52e7d9cbbd63c20e0a.tar.xz glibc-3d8b06bc6108aa20a6591f52e7d9cbbd63c20e0a.zip | |
Fix dbl-64 asin (sNaN) (bug 20213).
The dbl-64 version of asin returns sNaN for sNaN arguments. This patch fixes it to add NaN arguments to themselves so that qNaN is returned in this case. Tested for x86_64 and x86. [BZ #20213] * sysdeps/ieee754/dbl-64/e_asin.c (__ieee754_asin): Add NaN argument to itself. * math/libm-test.inc (asin_test_data): Add sNaN tests.
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | math/libm-test.inc | 2 | ||||
| -rw-r--r-- | sysdeps/ieee754/dbl-64/e_asin.c | 2 |
3 files changed, 10 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog index e207a71005..b839cfb11c 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,10 @@ +2016-06-06 Joseph Myers <joseph@codesourcery.com> + + [BZ #20213] + * sysdeps/ieee754/dbl-64/e_asin.c (__ieee754_asin): Add NaN + argument to itself. + * math/libm-test.inc (asin_test_data): Add sNaN tests. + 2016-06-06 Adhemerval Zanella <adhemerval.zanella@linaro.org> * misc/Makefile (CFLAGS-pwritev.c): New variable: add cancellation diff --git a/math/libm-test.inc b/math/libm-test.inc index 698172080c..f9b2c8ada8 100644 --- a/math/libm-test.inc +++ b/math/libm-test.inc @@ -1853,6 +1853,8 @@ static const struct test_f_f_data asin_test_data[] = TEST_f_f (asin, minus_infty, qnan_value, INVALID_EXCEPTION|ERRNO_EDOM), TEST_f_f (asin, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), TEST_f_f (asin, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), + TEST_f_f (asin, snan_value, qnan_value, INVALID_EXCEPTION), + TEST_f_f (asin, -snan_value, qnan_value, INVALID_EXCEPTION), /* asin x == qNaN plus invalid exception for |x| > 1. */ TEST_f_f (asin, 1.125L, qnan_value, INVALID_EXCEPTION|ERRNO_EDOM), diff --git a/sysdeps/ieee754/dbl-64/e_asin.c b/sysdeps/ieee754/dbl-64/e_asin.c index 5d5fb01132..23e9e7eddd 100644 --- a/sysdeps/ieee754/dbl-64/e_asin.c +++ b/sysdeps/ieee754/dbl-64/e_asin.c @@ -323,7 +323,7 @@ __ieee754_asin(double x){ /*---------------------------- |x|>=1 -------------------------------*/ else if (k==0x3ff00000 && u.i[LOW_HALF]==0) return (m>0)?hp0.x:-hp0.x; else - if (k>0x7ff00000 || (k == 0x7ff00000 && u.i[LOW_HALF] != 0)) return x; + if (k>0x7ff00000 || (k == 0x7ff00000 && u.i[LOW_HALF] != 0)) return x + x; else { u.i[HIGH_HALF]=0x7ff00000; v.i[HIGH_HALF]=0x7ff00000; |