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| author | Joseph Myers <joseph@codesourcery.com> | 2012-05-06 18:20:21 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2012-05-06 18:20:21 +0000 |
| commit | 6c23e11c4dd036e65073d4e4d6bc971a445deaea (patch) | |
| tree | 1b9c56995492fdc9fc46f0609769b75b494eacc4 | |
| parent | 62881be42dd5a81785f630658c6762b214056978 (diff) | |
| download | glibc-6c23e11c4dd036e65073d4e4d6bc971a445deaea.zip glibc-6c23e11c4dd036e65073d4e4d6bc971a445deaea.tar.gz glibc-6c23e11c4dd036e65073d4e4d6bc971a445deaea.tar.bz2 | |
Fix libm-test.inc ulps calculation for subnormals (bug 14064).
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | NEWS | 2 | ||||
| -rw-r--r-- | math/libm-test.inc | 5 |
3 files changed, 10 insertions, 3 deletions
@@ -1,3 +1,9 @@ +2012-05-06 Joseph Myers <joseph@codesourcery.com> + + [BZ #14064] + * math/libm-test.inc (check_float_internal): Correct ulp + calculation for subnormal expected results. + 2012-05-06 Andreas Jaeger <aj@suse.de> * Makeconfig (+math-flags): New, set to -frounding-math. @@ -23,7 +23,7 @@ Version 2.16 13854, 13871, 13872, 13873, 13879, 13883, 13886, 13892, 13895, 13908, 13910, 13911, 13912, 13913, 13915, 13916, 13917, 13918, 13919, 13920, 13921, 13922, 13924, 13926, 13927, 13928, 13938, 13941, 13942, 13963, - 13967, 13970, 13973, 14027, 14033, 14034, 14040, 14049, 14055 + 13967, 13970, 13973, 14027, 14033, 14034, 14040, 14049, 14055, 14064 * ISO C11 support: diff --git a/math/libm-test.inc b/math/libm-test.inc index 59192ed..d65c3e5 100644 --- a/math/libm-test.inc +++ b/math/libm-test.inc @@ -503,8 +503,9 @@ check_float_internal (const char *test_name, FLOAT computed, FLOAT expected, ulp = diff / FUNC(ldexp) (1.0, FUNC(ilogb) (expected) - MANT_DIG); break; case FP_SUBNORMAL: - ulp = (FUNC(ldexp) (diff, MANT_DIG) - / FUNC(ldexp) (1.0, FUNC(ilogb) (expected))); + /* 1ulp for a subnormal value, shifted by MANT_DIG, is the + least normal value. */ + ulp = (FUNC(ldexp) (diff, MANT_DIG) / min_value); break; default: /* It should never happen. */ |