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PowerPC: remove wrong ceill implementation for PowerPC64

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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
5c68d40169 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.
This commit is contained in:
Adhemerval Zanella
2014-03-14 07:35:43 -05:00
parent 4655c291d1
commit 374f7f6121
4 changed files with 17 additions and 133 deletions
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9
math/libm-test.inc
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@ -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),