2bb93784c6
zig can now cross compile hello.c targeting windows
75 lines
2.1 KiB
C
75 lines
2.1 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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int __mingw_has_sse(void)
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{
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int cpuInfo[4],infoType = 1;
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#ifndef _WIN64
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int o_flag, n_flag;
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__asm__ volatile ("pushfl\n\tpopl %0" : "=mr" (o_flag));
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n_flag = o_flag ^ 0x200000;
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__asm__ volatile ("pushl %0\n\tpopfl" : : "g" (n_flag));
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__asm__ volatile ("pushfl\n\tpopl %0" : "=mr" (n_flag));
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if (n_flag == o_flag)
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return 0;
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#endif
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__asm__ __volatile__ (
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"cpuid"
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: "=a" (cpuInfo[0]), "=b" (cpuInfo[1]), "=c" (cpuInfo[2]),
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"=d" (cpuInfo[3])
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: "a" (infoType));
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if (cpuInfo[3] & 0x2000000)
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return 1;
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return 0;
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}
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#endif /* !(defined(_ARM_) || defined(__arm__) || defined(_ARM64_) || defined(__aarch64__)) */
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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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#if defined(_ARM_) || defined(__arm__)
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__asm__ volatile ("fmrx %0, FPSCR" : "=r" (_env));
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_env.__cw &= ~(excepts & FE_ALL_EXCEPT);
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__asm__ volatile ("fmxr FPSCR, %0" : : "r" (_env));
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#elif defined(_ARM64_) || defined(__aarch64__)
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unsigned __int64 fpcr;
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(void) _env;
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__asm__ volatile ("mrs %0, fpcr" : "=r" (fpcr));
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fpcr &= ~(excepts & FE_ALL_EXCEPT);
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__asm__ volatile ("msr fpcr, %0" : : "r" (fpcr));
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#else
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int _mxcsr;
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if (excepts == FE_ALL_EXCEPT)
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{
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__asm__ volatile ("fnclex");
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}
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else
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{
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__asm__ volatile ("fnstenv %0" : "=m" (_env));
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_env.__status_word &= ~(excepts & FE_ALL_EXCEPT);
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__asm__ volatile ("fldenv %0" : : "m" (_env));
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}
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if (__mingw_has_sse ())
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{
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__asm__ volatile ("stmxcsr %0" : "=m" (_mxcsr));
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_mxcsr &= ~(((excepts & FE_ALL_EXCEPT)));
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__asm__ volatile ("ldmxcsr %0" : : "m" (_mxcsr));
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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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