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| author | Joseph Myers <joseph@codesourcery.com> | 2016-06-09 18:04:30 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2016-06-09 18:04:30 +0000 |
| commit | f00faa4a43706d85ad8d4d2c970d3f52f0f63bfb (patch) | |
| tree | 3ab8e31041ab2f0cd87b4b1501c1570a10a2d7dd /sysdeps/x86_64/fpu | |
| parent | b7519f61fe2c57981c69c0c65996968b9a4d9b62 (diff) | |
| download | glibc-f00faa4a43706d85ad8d4d2c970d3f52f0f63bfb.tar.gz glibc-f00faa4a43706d85ad8d4d2c970d3f52f0f63bfb.tar.xz glibc-f00faa4a43706d85ad8d4d2c970d3f52f0f63bfb.zip | |
Fix i386/x86_64 log2l (sNaN) (bug 20235).
The i386/x86_64 versions of log2l return sNaN for sNaN input. This patch fixes them to add NaN inputs to themselves so that qNaN is returned in this case. Tested for x86_64 and x86. [BZ #20235] * sysdeps/i386/fpu/e_log2l.S (__ieee754_log2l): Add NaN input to itself. * sysdeps/x86_64/fpu/e_log2l.S (__ieee754_log2l): Likewise. * math/libm-test.inc (log2_test_data): Add sNaN tests.
Diffstat (limited to 'sysdeps/x86_64/fpu')
| -rw-r--r-- | sysdeps/x86_64/fpu/e_log2l.S | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sysdeps/x86_64/fpu/e_log2l.S b/sysdeps/x86_64/fpu/e_log2l.S index a063255ddd..023ec29164 100644 --- a/sysdeps/x86_64/fpu/e_log2l.S +++ b/sysdeps/x86_64/fpu/e_log2l.S @@ -63,6 +63,7 @@ ENTRY(__ieee754_log2l) jnz 4b // in case x is ħInf fstp %st(1) fstp %st(1) + fadd %st(0) ret END (__ieee754_log2l) |