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| author | Joseph Myers <joseph@codesourcery.com> | 2015-09-24 22:25:30 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2015-09-24 22:25:30 +0000 |
| commit | b2a64460ba9aca39e92731da67cc6344acb483bc (patch) | |
| tree | 213e279495212accf939a0d03c10e16c131963cc /ChangeLog.9 | |
| parent | 1a19b8894f93878f99025096ec1d3b6af7db6f78 (diff) | |
| download | glibc-b2a64460ba9aca39e92731da67cc6344acb483bc.tar.gz glibc-b2a64460ba9aca39e92731da67cc6344acb483bc.tar.xz glibc-b2a64460ba9aca39e92731da67cc6344acb483bc.zip | |
Refactor x86_64 libm code forcing underflow exceptions.
This patch refactors code in sysdeps/x86_64/fpu that forces underflow exceptions and closely follows corresponding i386 code to use common macros in x86_64-math-asm.h for that purpose. This is mainly about keeping the code similar to the i386 code as far as possible, since each macro apart from DEFINE_LDBL_MIN ends up used only once. It would be possible to do a further refactoring to share these macros between i386 and x86_64 (with i386 using the fcomip / fucomip versions when building for i686 and above), but I have no immediate plans to do so. Tested for x86_64. * sysdeps/x86_64/fpu/x86_64-math-asm.h: New file. * sysdeps/x86_64/fpu/e_exp2l.S: Include <x86_64-math-asm.h>. (ldbl_min): Replace with use of DEFINE_LDBL_MIN. (__ieee754_exp2l): Use LDBL_CHECK_FORCE_UFLOW_NONNEG_NAN. * sysdeps/x86_64/fpu/e_expl.S: Include <x86_64-math-asm.h>. [!USE_AS_EXPM1L] (cmin): Replace with use of DEFINE_LDBL_MIN. (IEEE754_EXPL): Use LDBL_CHECK_FORCE_UFLOW_NONNEG.
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