49d1a4c562
also start prefering NtDll API. so far: * NtQueryInformationFile * NtClose adds a performance workaround for windows unicode conversion. but that should probably be removed before merging
44 lines
1.5 KiB
C
44 lines
1.5 KiB
C
/**
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* This file has no copyright assigned and is placed in the Public Domain.
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* This file is part of the mingw-w64 runtime package.
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* No warranty is given; refer to the file DISCLAIMER.PD within this package.
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*/
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#include <fenv.h>
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#if !(defined(_ARM_) || defined(__arm__) || defined(_ARM64_) || defined(__aarch64__))
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extern int __mingw_has_sse (void);
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#endif /* !(defined(_ARM_) || defined(__arm__) || defined(_ARM64_) || defined(__aarch64__)) */
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/* 7.6.2.5
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The fetestexcept function determines which of a specified subset of
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the exception flags are currently set. The excepts argument
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specifies the exception flags to be queried.
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The fetestexcept function returns the value of the bitwise OR of the
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exception macros corresponding to the currently set exceptions
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included in excepts. */
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int fetestexcept (int excepts)
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{
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#if defined(_ARM_) || defined(__arm__)
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fenv_t _env;
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__asm__ volatile ("fmrx %0, FPSCR" : "=r" (_env));
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return _env.__cw & excepts & FE_ALL_EXCEPT;
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#elif defined(_ARM64_) || defined(__aarch64__)
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unsigned __int64 fpcr;
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__asm__ volatile ("mrs %0, fpcr" : "=r" (fpcr));
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return fpcr & excepts & FE_ALL_EXCEPT;
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#else
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unsigned short _sw;
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__asm__ __volatile__ ("fnstsw %%ax" : "=a" (_sw));
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if (__mingw_has_sse ())
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{
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int sse_sw;
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__asm__ __volatile__ ("stmxcsr %0;" : "=m" (sse_sw));
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_sw |= sse_sw;
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}
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return _sw & excepts & FE_ALL_EXCEPT;
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#endif /* defined(_ARM_) || defined(__arm__) || defined(_ARM64_) || defined(__aarch64__) */
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}
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