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| author | Joseph Myers <joseph@codesourcery.com> | 2014-02-18 14:45:41 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2014-02-18 14:45:41 +0000 |
| commit | a4fb786185fce5048a13c7879f67dfbe59ff70be (patch) | |
| tree | 32d90a80cb679c5d96320ec56b92928312e1246e /math/auto-libm-test-in | |
| parent | ef114eafbff80525d079d7d6fadd69a58eb8dcc3 (diff) | |
| download | glibc-a4fb786185fce5048a13c7879f67dfbe59ff70be.zip glibc-a4fb786185fce5048a13c7879f67dfbe59ff70be.tar.gz glibc-a4fb786185fce5048a13c7879f67dfbe59ff70be.tar.bz2 | |
Fix gen-auto-libm-tests sticky bit setting for negative results.
gen-auto-libm-tests has a bug in the logic for setting a sticky bit
based on the ternary value from MPFR: it is correct for positive
results, but for negative results mpz_setbit acts as if a two's
complement representation is used, whereas the low bit needs setting
based on the sign-magnitude representation GMP actually uses. (This
showed up in converting fma tests to use auto-libm-test-in /
gen-auto-libm-tests.)
This patch fixes the problem by negating the mpz_t value to set its
low bit. There are lots of changes to auto-libm-test-out (mainly 1ulp
fixes to ldbl-128 expected results), but only a few ulps updates are
needed on x86 / x86_64. In one case, a corrected expectation showed
up a spurious underflow exception where the correct result is slightly
outside the underflowing range.
Tested x86_64 and x86 and ulps updated accordingly.
* math/gen-auto-libm-tests.c (adjust_real): Ensure integers are
non-negative before setting low bit.
* math/auto-libm-test-in: Mark one asin test possibly having
spurious underflow.
* math/auto-libm-test-out: Regenerated.
* sysdeps/i386/fpu/libm-test-ulps: Update.
* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
Diffstat (limited to 'math/auto-libm-test-in')
| -rw-r--r-- | math/auto-libm-test-in | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/math/auto-libm-test-in b/math/auto-libm-test-in index c620361..17158ea 100644 --- a/math/auto-libm-test-in +++ b/math/auto-libm-test-in @@ -61,8 +61,9 @@ asin -0x0.ffffffffffffp0 asin 0x0.ffffffffffffffffp0 asin -0x0.ffffffffffffffffp0 # Bug 16351: underflow exception may be missing. +# Bug 16599: spurious underflow may occur. asin min missing-underflow -asin -min missing-underflow +asin -min missing-underflow spurious-underflow:dbl-64:x86 asin min_subnorm missing-underflow asin -min_subnorm missing-underflow |