f34428eb35
* cpu_features.c: New file. * cpu_features.h: New file. * crt1.c: Include "cpu_features.h". (__mingw_CRTStartup): Call cpu_features_init(). * Makefile.in (MING_OBJS): Add cpu_features.c. (SRCDIST_FILES): Add cpu_features.c, cpu_features.h. * include/fenv,h ( fenv_t;): Append __mxcsr field. (__MXCSR_EXCEPT_FLAG_SHIFT): New define. (__MXCSR_EXCEPT_MASK_SHIFT): New define. (__MXCSR_ROUND_FLAG_SHIFT): New define. * mingwex/feclearexcept.c: Include "cpu_features.h". Handle SSE environment. * mingwex/fegetenv.c: Likewise. * mingwex/feholdexcept.c: Likewise. * mingwex/fesetenv.c: Likewise. * mingwex/fesetexceptflag.c: Likewise. * mingwex/fesetround.c: Likewise. * mingwex/fetestexcept.c: Likewise. * mingwex/feupdateenv.c: Likewise. * mingwex/fegetround.c: Add comment.
25 lines
690 B
C
25 lines
690 B
C
#include <fenv.h>
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#include "cpu_features.h"
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/* 7.6.2.1
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The feclearexcept function clears the supported exceptions
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represented by its argument. */
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int feclearexcept (int excepts)
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{
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fenv_t _env;
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excepts &= FE_ALL_EXCEPT;
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__asm__ volatile ("fnstenv %0;" : "=m" (_env)); /* get the env */
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_env.__status_word &= ~excepts; /* clear the except */
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__asm__ volatile ("fldenv %0;" :: "m" (_env)); /*set the env */
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if (__HAS_SSE)
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{
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unsigned _csr;
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__asm__ volatile("stmxcsr %0" : "=m" (_csr)); /* get the register */
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_csr &= ~excepts; /* clear the except */
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__asm__ volatile("ldmxcsr %0" : : "m" (_csr)); /* set the register */
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}
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return 0;
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}
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