29 lines
844 B
C
29 lines
844 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 __FP_SIGNBIT 0x0200
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int __signbitf (float x);
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typedef union __mingw_flt_type_t {
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float x;
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unsigned int val;
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} __mingw_flt_type_t;
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int __signbitf (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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return ((hlp.val & 0x80000000) != 0);
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#elif defined(__i386__) || defined(_X86_)
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unsigned short sw;
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__asm__ __volatile__ ("fxam; fstsw %%ax;"
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: "=a" (sw)
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: "t" (x) );
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return (sw & __FP_SIGNBIT) != 0;
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#endif
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}
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int __attribute__ ((alias ("__signbitf"))) signbitf (float);
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