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math.h: make __FLOAT_BITS and __DOUBLE_BITS C89
[musl]
/
src
/
math
/
rintf.c
1
#include <math.h>
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#include <stdint.h>
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float rintf(float x)
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{
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union {float f; uint32_t i;} u = {x};
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int e = u.i>>23 & 0xff;
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int s = u.i>>31;
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float_t y;
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if (e >= 0x7f+23)
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return x;
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if (s)
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y = (float)(x - 0x1p23f) + 0x1p23f;
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else
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y = (float)(x + 0x1p23f) - 0x1p23f;
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if (y == 0)
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return s ? -0.0f : 0.0f;
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return y;
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}