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
40 lines
1.4 KiB
C
40 lines
1.4 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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int __mingw_has_sse (void);
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#endif /* !(defined(_ARM_) || defined(__arm__) || defined(_ARM64_) || defined(__aarch64__)) */
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/* 7.6.4.1
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The fegetenv function stores the current floating-point environment
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in the object pointed to by envp. */
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int fegetenv (fenv_t * envp)
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{
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#if defined(_ARM_) || defined(__arm__)
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__asm__ volatile ("fmrx %0, FPSCR" : "=r" (*envp));
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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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envp->__cw = fpcr;
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#else
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__asm__ __volatile__ ("fnstenv %0;": "=m" (*envp));
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/* fnstenv sets control word to non-stop for all exceptions, so we
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need to reload our env to restore the original mask. */
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__asm__ __volatile__ ("fldenv %0" : : "m" (*envp));
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if (__mingw_has_sse ())
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{
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int _mxcsr;
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__asm__ __volatile__ ("stmxcsr %0" : "=m" (_mxcsr));
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envp->__unused0 = (((unsigned int) _mxcsr) >> 16);
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envp->__unused1 = (((unsigned int) _mxcsr) & 0xffff);
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}
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#endif /* defined(_ARM_) || defined(__arm__) || defined(_ARM64_) || defined(__aarch64__) */
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return 0;
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}
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