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* Use #include "fenv.h" instead of #include <fenv.h>. This makes itdas2011-10-161-1/+1
| | | | | | more convenient to compile the math library by itself. Requested by: bde
* Provide external definitions of all of the standardized functions indas2011-10-103-14/+45
| | | | | | | | | | | | | | | | | fenv.h that are currently inlined. The definitions are provided in fenv.c via 'extern inline' declaractions. This assumes the compiler handles 'extern inline' as specified in C99, which has been true under FreeBSD since 8.0. The goal is to eventually remove the 'static' keyword from the inline definitions in fenv.h, so that non-inlined references all wind up pointing to the same external definition like they're supposed to. I am deferring the second step to provide a window where newly-compiled apps will still link against old math libraries. (This isn't supported, but there's no need to cause undue breakage.) Reviewed by: stefanf, bde
* Use C comments since we now preprocess these files with CPP.deischen2007-04-291-1/+3
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* Add symbol versioning to libm.deischen2006-03-272-0/+4
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* Replace fegetmask() and fesetmask() with feenableexcept(),das2005-03-161-9/+19
| | | | | | | | | | fedisableexcept(), and fegetexcept(). These two sets of routines provide the same functionality. I implemented the former as an undocumented internal interface to make the regression test easier to write. However, fe(enable|disable|get)except() is already part of glibc, and I would like to avoid gratuitous differences. The only major flaw in the glibc API is that there's no good way to report errors on processors that don't support all the unmasked exceptions.
* Define the LDBL_PREC to be the number of significant bits in a longdas2005-03-071-0/+1
| | | | double's mantissa.
* Use hardware instructions for sqrt() and sqrtf().das2005-02-213-0/+69
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* Mark all inline asms that read the floating-point control or statusdas2005-01-141-1/+1
| | | | | | | registers as volatile. Instructions that *wrote* to FP state were already marked volatile, but apparently gcc has license to move non-volatile asms past volatile asms. This broke amd64's feupdateenv at -O2 due to a WAR conflict between fnstsw and fldenv there.
* Add an fenv.h implementation for the sparc64 port.das2004-06-062-0/+280
Reviewed by: standards@
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