| Commit message (Collapse) | Author | Age | Files | Lines | |
|---|---|---|---|---|---|
| * | Make the fenv.h routines work for programs that use SSE for | das | 2005-03-17 | 1 | -81/+86 |
| | | | | | | | | | | | | | | | | | | | | | | | | | | floating-point arithmetic on i386. Now I'm going to make excuses for why this code is kinda scary: - To avoid breaking the ABI with 5.3-RELEASE, we can't change sizeof(fenv_t). I stuck the saved mxcsr in some discontiguous reserved bits in the existing structure. - Attempting to access the mxcsr on older processors results in an illegal instruction exception, so support for SSE must be detected at runtime. (The extra baggage is optimized away if either the application or libm is compiled with -msse{,2}.) I didn't run tests to ensure that this doesn't SIGILL on older 486's lacking the cpuid instruction or on other processors lacking SSE. Results from running the fenv regression test on these processors would be appreciated. (You'll need to compile the test with -DNO_STRICT_DFL_ENV.) If you have an 80386, or if your processor supports SSE but the kernel didn't enable it, then you're probably out of luck. Also, I un-inlined some of the functions that grew larger as a result of this change, moving them from fenv.h to fenv.c. | ||||
| * | Replace fegetmask() and fesetmask() with feenableexcept(), | das | 2005-03-16 | 1 | -4/+15 |
| | | | | | | | | | | | 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. | ||||
| * | Mark all inline asms that read the floating-point control or status | das | 2005-01-14 | 1 | -3/+3 |
| | | | | | | | | 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 i386 port. | das | 2004-06-06 | 1 | -0/+224 |
| Reviewed by: standards@ | |||||
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| Raptor Engineering's fork of pfsense FreeBSD src with pfSense changes | Raptor Engineering, LLC |
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