kaguya
25 lines
362 B
C
25 lines
362 B
C
#include <math.h>
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#include <stdint.h>
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float frexpf(float x, int *e)
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{
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union { float f; uint32_t i; } y = { x };
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int ee = y.i>>23 & 0xff;
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if (!ee) {
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if (x) {
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x = frexpf(x*0x1p64, e);
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*e -= 64;
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} else *e = 0;
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return x;
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} else if (ee == 0xff) {
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*e = 0;
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return x;
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}
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*e = ee - 0x7e;
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y.i &= 0x807ffffful;
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y.i |= 0x3f000000ul;
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return y.f;
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}
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