Last change
on this file since 373 was 352, checked in by coas-nagasima, 6 years ago |
arm向けASP3版ECNLを追加
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Property svn:eol-style
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native
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Property svn:mime-type
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File size:
744 bytes
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1 | #include "libm.h"
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2 |
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3 | #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
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4 | long double ceill(long double x)
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5 | {
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6 | return ceil(x);
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7 | }
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8 | #elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
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9 |
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10 | static const long double toint = 1/LDBL_EPSILON;
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11 |
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12 | long double ceill(long double x)
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13 | {
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14 | union ldshape u = {x};
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15 | int e = u.i.se & 0x7fff;
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16 | long double y;
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17 |
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18 | if (e >= 0x3fff+LDBL_MANT_DIG-1 || x == 0)
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19 | return x;
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20 | /* y = int(x) - x, where int(x) is an integer neighbor of x */
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21 | if (u.i.se >> 15)
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22 | y = x - toint + toint - x;
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23 | else
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24 | y = x + toint - toint - x;
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25 | /* special case because of non-nearest rounding modes */
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26 | if (e <= 0x3fff-1) {
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27 | FORCE_EVAL(y);
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28 | return u.i.se >> 15 ? -0.0 : 1;
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29 | }
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30 | if (y < 0)
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31 | return x + y + 1;
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32 | return x + y;
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33 | }
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34 | #endif
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