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[musl]
/
fmod.c
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#include <math.h>
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double fmod(double x, double y)
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{
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unsigned short fpsr;
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// fprem does not introduce excess precision into x
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do __asm__ ("fprem; fnstsw %%ax" : "+t"(x), "=a"(fpsr) : "u"(y));
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while (fpsr & 0x400);
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return x;
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}