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| author | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2014-03-14 07:35:43 -0500 |
|---|---|---|
| committer | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2014-03-14 12:54:47 -0500 |
| commit | 374f7f61214967bb4e2257695aeeeecc2a77f369 (patch) | |
| tree | 5fdfc34f3a435a8df5823508a51e5bb3e726a300 /math | |
| parent | 4655c291d1808c35b7c54236ae62be7a3aaa0a2d (diff) | |
| download | glibc-374f7f61214967bb4e2257695aeeeecc2a77f369.zip glibc-374f7f61214967bb4e2257695aeeeecc2a77f369.tar.gz glibc-374f7f61214967bb4e2257695aeeeecc2a77f369.tar.bz2 | |
PowerPC: remove wrong ceill implementation for PowerPC64
The ceill assembly implementation (sysdeps/powerpc/powerpc64/fpu/s_ceill.S)
returns wrong results for some inputs where first double is a exact
integer and the precision is determined by second long double.
Checking on implementation comments and history, I am very confident the
assembly implementation was based on a version before commit
5c68d401698a58cf7da150d9cce769fa6679ba5f that fixes BZ#2423 (Errors in
long double (ldbl-128ibm) rounding functions in glibc-2.4).
By just removing the implementation and make the build select
sysdeps/ieee754/ldbl-128ibm/s_ceill.c instead fixes the failing math.
Fixes BZ#16701.
Diffstat (limited to 'math')
| -rw-r--r-- | math/libm-test.inc | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/math/libm-test.inc b/math/libm-test.inc index 10e7806..c151b7d 100644 --- a/math/libm-test.inc +++ b/math/libm-test.inc @@ -6106,6 +6106,15 @@ static const struct test_f_f_data ceil_test_data[] = TEST_f_f (ceil, -72057594037927936.75L, -72057594037927936.0L), TEST_f_f (ceil, -72057594037927937.5L, -72057594037927937.0L), + /* Check cases where first double is a exact integer higher than 2^52 and + the precision is determined by second long double for IBM long double. */ + TEST_f_f (ceil, 34503599627370498.515625L, 34503599627370499.0L), + TEST_f_f (ceil, -34503599627370498.515625L, -34503599627370498.0L), +# if LDBL_MANT_DIG >= 106 + TEST_f_f (ceil, 1192568192774434123539907640624.484375L, 1192568192774434123539907640625.0L), + TEST_f_f (ceil, -1192568192774434123539907640624.484375L, -1192568192774434123539907640624.0L), +# endif + TEST_f_f (ceil, 10141204801825835211973625643007.5L, 10141204801825835211973625643008.0L), TEST_f_f (ceil, 10141204801825835211973625643008.25L, 10141204801825835211973625643009.0L), TEST_f_f (ceil, 10141204801825835211973625643008.5L, 10141204801825835211973625643009.0L), |