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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 /ChangeLog | |
| parent | ef114eafbff80525d079d7d6fadd69a58eb8dcc3 (diff) | |
| download | glibc-a4fb786185fce5048a13c7879f67dfbe59ff70be.tar.gz glibc-a4fb786185fce5048a13c7879f67dfbe59ff70be.tar.xz glibc-a4fb786185fce5048a13c7879f67dfbe59ff70be.zip | |
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 'ChangeLog')
| -rw-r--r-- | ChangeLog | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index 12a8f22ec7..eef7d87bd1 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,13 @@ +2014-02-18 Joseph Myers <joseph@codesourcery.com> + + * 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. + 2014-02-17 David Holsgrove <david.holsgrove@xilinx.com> * sysdeps/microblaze: Move directory from ports/sysdeps/microblaze. |