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| author | Joseph Myers <joseph@codesourcery.com> | 2015-09-17 21:21:39 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2015-09-17 21:21:39 +0000 |
| commit | 61f893789862db1dfdf188f77cd215bab0814d2c (patch) | |
| tree | 9fd0f9b8395f451e24f8ce1c12253847740f8e31 /ChangeLog | |
| parent | b8682397ab2db1aed7f25d0a0c7c81134a97c8c7 (diff) | |
| download | glibc-61f893789862db1dfdf188f77cd215bab0814d2c.tar.gz glibc-61f893789862db1dfdf188f77cd215bab0814d2c.tar.xz glibc-61f893789862db1dfdf188f77cd215bab0814d2c.zip | |
Fix sign of zero part from ctan / ctanh when argument infinite (bug 17118).
C99/C11 Annex G specifies the sign of the zero part of the result of ctan (x +/- i * Inf) and ctanh (+/-Inf + i * y). This patch fixes glibc to follow that specification, along the lines I described in my review of Andreas's previous patch for this issue <https://sourceware.org/ml/libc-alpha/2014-08/msg00142.html>. Tested for x86_64. 2015-09-17 Joseph Myers <joseph@codesourcery.com> Andreas Schwab <schwab@suse.de> [BZ #17118] * math/s_ctan.c (__ctan): Determine sign of zero real part of result when imaginary part of argument is infinite using sine and cosine. * math/s_ctanf.c (__ctanf): Likewise. * math/s_ctanl.c (__ctanl): Likewise. * math/s_ctanh.c (__ctanh): Determine sign of zero imaginary part of result when real part of argument is infinite using sine and cosine. * math/s_ctanhf.c (__ctanhf): Likewise. * math/s_ctanhl.c (__ctanhl): Likewise. * math/libm-test.inc (ctan_test_data): Add more tests of ctan. (ctanh_test_data): Add more tests of ctanh.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index eec2c829db..4de1a56fd4 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,4 +1,21 @@ 2015-09-17 Joseph Myers <joseph@codesourcery.com> + Andreas Schwab <schwab@suse.de> + + [BZ #17118] + * math/s_ctan.c (__ctan): Determine sign of zero real part of + result when imaginary part of argument is infinite using sine and + cosine. + * math/s_ctanf.c (__ctanf): Likewise. + * math/s_ctanl.c (__ctanl): Likewise. + * math/s_ctanh.c (__ctanh): Determine sign of zero imaginary part + of result when real part of argument is infinite using sine and + cosine. + * math/s_ctanhf.c (__ctanhf): Likewise. + * math/s_ctanhl.c (__ctanhl): Likewise. + * math/libm-test.inc (ctan_test_data): Add more tests of ctan. + (ctanh_test_data): Add more tests of ctanh. + +2015-09-17 Joseph Myers <joseph@codesourcery.com> [BZ #15384] * sysdeps/ieee754/dbl-64/s_finite.c (FINITE): Use same constant as |