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| author | Joseph Myers <joseph@codesourcery.com> | 2014-06-23 20:15:14 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2014-06-23 20:15:14 +0000 |
| commit | 863893ec95f316a3d156d487b99242ee1b52f803 (patch) | |
| tree | 88b7b115fcd0036af09a8089645db9e9cc221f7a /math/auto-libm-test-in | |
| parent | 4da6db51880289f0bf41b39e05cf9bb1c4769c47 (diff) | |
| download | glibc-863893ec95f316a3d156d487b99242ee1b52f803.tar.gz | |
Test cpow in all rounding modes.
This patch enables testing of cpow in all rounding modes using
ALL_RM_TEST. There were two reasons this was previously deferred:
* MPC has complicated rounding-mode-dependent rules for the signs of
exact zero real or imaginary parts in the result of mpc_pow. Annex
G does not impose any such requirements and I don't think glibc
should try to implement any particular logic here. This patch adds
support for gen-auto-libm-tests passing the IGNORE_ZERO_INF_SIGN
flag to libm-test.inc.
* Error accumulations in some tests in non-default rounding modes
exceed the maximum error permitted in libm-test.inc. This patch
marks the problem tests with xfail-rounding. (It might be possible
to reduce the accumulations a bit by using round-to-nearest when
cpow calls clog, but I don't think there's much point; the
implementation approach for cpow is fundamentally deficient, as
discussed in the existing bug for cpow inaccuracy which can
reasonably be considered to cover these less-inaccurate cases as
well. It's possible that the test "cpow 2 0 10 0" will also need
xfail-rounding on some platforms.)
Tested x86_64 and x86 and ulps updated accordingly.
* math/gen-auto-libm-tests.c: Document use of
ignore-zero-inf-sign.
(input_flag_type): Add value flag_ignore_zero_inf_sign.
(input_flags): Add ignore-zero-inf-sign.
(output_for_one_input_case): Handle flag_ignore_zero_inf_sign.
* math/gen-libm-test.pl (generate_testfile): Handle
ignore-zero-inf-sign.
* math/auto-libm-test-in: Mark some cpow tests with
ignore-zero-inf-sign and some with xfail-rounding.
* math/auto-libm-test-out: Regenerated.
* math/libm-test.inc (cpow_test): Use ALL_RM_TEST.
* 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 | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/math/auto-libm-test-in b/math/auto-libm-test-in index 0053340e18..673a4446a2 100644 --- a/math/auto-libm-test-in +++ b/math/auto-libm-test-in @@ -652,14 +652,14 @@ cosh 0x2.c5d37700c6bb03a6c24b6c9b494ep+12 no-test-inline xfail-rounding:ldbl-128 cosh -0x2.c5d37700c6bb03a6c24b6c9b494cp+12 no-test-inline xfail-rounding:ldbl-128ibm cosh -0x2.c5d37700c6bb03a6c24b6c9b494ep+12 no-test-inline xfail-rounding:ldbl-128ibm -cpow 1 0 0 0 -cpow 2 0 10 0 +cpow 1 0 0 0 ignore-zero-inf-sign +cpow 2 0 10 0 ignore-zero-inf-sign # Bug 14473: cpow results inaccurate. cpow e 0 0 2pi xfail -cpow 2 3 4 0 +cpow 2 3 4 0 xfail-rounding -cpow 0.75 1.25 0.75 1.25 -cpow 0.75 1.25 1.0 1.0 +cpow 0.75 1.25 0.75 1.25 xfail-rounding +cpow 0.75 1.25 1.0 1.0 xfail-rounding cpow 0.75 1.25 1.0 0.0 cpow 0.75 1.25 0.0 1.0 |