diff options
| author | Joseph Myers <joseph@codesourcery.com> | 2017-12-06 21:35:20 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2017-12-06 21:35:20 +0000 |
| commit | 5244527da1bfa751492e146d3e6ae128c59bfcc4 (patch) | |
| tree | 28d4610ca18dc12b2ae6c7d7877e23ac26894942 /ChangeLog | |
| parent | d73fac82bedc124f00a39eba703e5a9c53e8028d (diff) | |
Make cacosh (0 + iNaN) return NaN + i pi/2 (bug 22561, DR#471).
As per C11 DR#471 (adjusted resolution accepted for C17), cacosh (0 +
iNaN) should return NaN +/- i pi/2, not NaN + iNaN.
This patch fixes the code accordingly. The test has hardcoded the
result with positive sign of the imaginary part (with an associated
comment), since the unspecified sign for a result other than 0 or
infinity isn't currently supported by the test infrastructure.
Tested for x86_64.
[BZ #22561]
* math/s_cacosh_template.c (M_DECL_FUNC (__cacosh)): Use pi/2 for
real part of result for argument 0 + i * NaN.
* math/libm-test-cacosh.inc (cacosh_test_data): Update expected
results for tests of 0 + i * NaN.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 8 |
1 files changed, 8 insertions, 0 deletions
@@ -1,3 +1,11 @@ +2017-12-06 Joseph Myers <joseph@codesourcery.com> + + [BZ #22561] + * math/s_cacosh_template.c (M_DECL_FUNC (__cacosh)): Use pi/2 for + real part of result for argument 0 + i * NaN. + * math/libm-test-cacosh.inc (cacosh_test_data): Update expected + results for tests of 0 + i * NaN. + 2017-12-06 Adhemerval Zanella <adhemerval.zanella@linaro.org> * sysdeps/alpha/fpu/libm-test-ulps: Update. |