Last change
on this file since 367 was 337, checked in by coas-nagasima, 6 years ago |
ASP3版ECNLを追加
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-
Property svn:eol-style
set to
native
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Property svn:mime-type
set to
text/x-csrc;charset=UTF-8
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File size:
433 bytes
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Rev | Line | |
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[337] | 1 | #include "libm.h"
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| 2 |
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| 3 | float floorf(float x)
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| 4 | {
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| 5 | union {float f; uint32_t i;} u = {x};
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| 6 | int e = (int)(u.i >> 23 & 0xff) - 0x7f;
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| 7 | uint32_t m;
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| 8 |
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| 9 | if (e >= 23)
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| 10 | return x;
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| 11 | if (e >= 0) {
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| 12 | m = 0x007fffff >> e;
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| 13 | if ((u.i & m) == 0)
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| 14 | return x;
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| 15 | FORCE_EVAL(x + 0x1p120f);
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| 16 | if (u.i >> 31)
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| 17 | u.i += m;
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| 18 | u.i &= ~m;
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| 19 | } else {
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| 20 | FORCE_EVAL(x + 0x1p120f);
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| 21 | if (u.i >> 31 == 0)
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| 22 | u.i = 0;
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| 23 | else if (u.i << 1)
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| 24 | u.f = -1.0;
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| 25 | }
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| 26 | return u.f;
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| 27 | }
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