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
29 lines
1.0 KiB
C
29 lines
1.0 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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/* 7.6.3.1
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The fegetround function returns the value of the rounding direction
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macro representing the current rounding direction. */
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int
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fegetround (void)
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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 & (FE_TONEAREST | FE_DOWNWARD | FE_UPWARD | FE_TOWARDZERO));
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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 & (FE_TONEAREST | FE_DOWNWARD | FE_UPWARD | FE_TOWARDZERO));
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#else
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int _control;
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__asm__ volatile ("fnstcw %0" : "=m" (*&_control));
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return (_control & (FE_TONEAREST | FE_DOWNWARD | FE_UPWARD | FE_TOWARDZERO));
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#endif /* defined(_ARM_) || defined(__arm__) || defined(_ARM64_) || defined(__aarch64__) */
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}
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