28 lines
843 B
C
28 lines
843 B
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 <math.h>
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int
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__isnanf (float _x)
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{
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#if defined(__x86_64__) || defined(_AMD64_) || defined(__arm__) || defined(_ARM_) || defined(__aarch64__) || defined(_ARM64_)
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__mingw_flt_type_t hlp;
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int i;
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hlp.x = _x;
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i = hlp.val & 0x7fffffff;
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i = 0x7f800000 - i;
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return (int) (((unsigned int) i) >> 31);
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#elif defined(__i386__) || defined(_X86_)
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unsigned short _sw;
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__asm__ __volatile__ ("fxam;"
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"fstsw %%ax": "=a" (_sw) : "t" (_x) );
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return (_sw & (FP_NAN | FP_NORMAL | FP_INFINITE | FP_ZERO | FP_SUBNORMAL))
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== FP_NAN;
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#endif
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}
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int __attribute__ ((alias ("__isnanf"))) isnanf (float);
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