13 lines
280 B
C
13 lines
280 B
C
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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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unsigned short _sw;
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__asm__ ("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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}
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int __attribute__ ((alias ("__isnanf"))) isnanf (float);
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