33 lines
894 B
C
33 lines
894 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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#define __CRT__NO_INLINE
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#include <math.h>
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int __fpclassifyf (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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hlp.x = _x;
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hlp.val &= 0x7fffffff;
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if (hlp.val == 0)
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return FP_ZERO;
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if (hlp.val < 0x800000)
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return FP_SUBNORMAL;
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if (hlp.val >= 0x7f800000)
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return (hlp.val > 0x7f800000 ? FP_NAN : FP_INFINITE);
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return FP_NORMAL;
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#elif defined(__i386__) || defined(_X86_)
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unsigned short sw;
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__asm__ __volatile__ (
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"fxam; fstsw %%ax;"
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: "=a" (sw)
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: "t" (_x)
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);
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return sw & (FP_NAN | FP_NORMAL | FP_ZERO);
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#endif
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}
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