source: azure_iot_hub/trunk/musl-1.1.18/src/math/ceilf.c@ 389

Last change on this file since 389 was 389, checked in by coas-nagasima, 5 years ago

ビルドが通るよう更新
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  • Property svn:mime-type set to text/x-csrc;charset=UTF-8
File size: 434 bytes
Line 
1#include "libm.h"
2
3float ceilf(float x)
4{
5 union {float f; uint32_t i;} u = {x};
6 int e = (int)(u.i >> 23 & 0xff) - 0x7f;
7 uint32_t m;
8
9 if (e >= 23)
10 return x;
11 if (e >= 0) {
12 m = 0x007fffff >> e;
13 if ((u.i & m) == 0)
14 return x;
15 FORCE_EVAL(x + 0x1p120f);
16 if (u.i >> 31 == 0)
17 u.i += m;
18 u.i &= ~m;
19 } else {
20 FORCE_EVAL(x + 0x1p120f);
21 if (u.i >> 31)
22 u.f = -0.0;
23 else if (u.i << 1)
24 u.f = 1.0;
25 }
26 return u.f;
27}
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