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author | Joseph Myers <joseph@codesourcery.com> | 2015-10-01 15:24:54 +0000 |
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committer | Joseph Myers <joseph@codesourcery.com> | 2015-10-01 15:24:54 +0000 |
commit | e27fcd027cbdc2f13bf440177c0434eb9ec3dd28 (patch) | |
tree | 8b653db2c0bbc46e46589ed9c2853baf23659dff /math/auto-libm-test-in | |
parent | 7cda516f5f23772fd37ca3a5e018fca5bf388435 (diff) | |
download | glibc-e27fcd027cbdc2f13bf440177c0434eb9ec3dd28.tar.gz glibc-e27fcd027cbdc2f13bf440177c0434eb9ec3dd28.tar.xz glibc-e27fcd027cbdc2f13bf440177c0434eb9ec3dd28.zip |
Use type-specific precision when printing results in libm-test.inc.
When libm-test.inc prints the results of failing tests, the output can be unhelpful for ldbl-128 and ldbl-128ibm because the precision used is insufficient to distinguish values of those types, resulting in reported values that look identical but differ by a large number of ulps. This patch changes it to use a precision appropriate for the type, for both decimal and hex output (so output for float is more compact, output for ldbl-128 and ldbl-128ibm is substantially wider). The natural precision to use for decimal is given by the C11 <float.h> macros such as FLT_DECIMAL_DIG. GCC's <float.h> only defines those in C11 mode, so this patch uses the predefines such as __FLT_DECIMAL_DIG__ (added in GCC 4.6) instead; if we move to building with -std=gnu11 (or -std=gnu1x if we can't get rid of 4.6 support). Tested for powerpc and mips64. * math/libm-test.inc (TYPE_DECIMAL_DIG): New macro. (TYPE_HEX_DIG): Likewise. (print_float): Use TYPE_DECIMAL_DIG - 1 and TYPE_HEX_DIG - 1 as precisions when printing floating-point numbers. (check_float_internal): Likewise.
Diffstat (limited to 'math/auto-libm-test-in')
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