Last change
on this file since 377 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:
916 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 coshl(long double x)
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5 | {
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6 | return cosh(x);
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7 | }
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8 | #elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384
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9 | long double coshl(long double x)
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10 | {
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11 | union ldshape u = {x};
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12 | unsigned ex = u.i.se & 0x7fff;
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13 | uint32_t w;
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14 | long double t;
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15 |
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16 | /* |x| */
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17 | u.i.se = ex;
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18 | x = u.f;
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19 | w = u.i.m >> 32;
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20 |
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21 | /* |x| < log(2) */
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22 | if (ex < 0x3fff-1 || (ex == 0x3fff-1 && w < 0xb17217f7)) {
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23 | if (ex < 0x3fff-32) {
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24 | FORCE_EVAL(x + 0x1p120f);
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25 | return 1;
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26 | }
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27 | t = expm1l(x);
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28 | return 1 + t*t/(2*(1+t));
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29 | }
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30 |
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31 | /* |x| < log(LDBL_MAX) */
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32 | if (ex < 0x3fff+13 || (ex == 0x3fff+13 && w < 0xb17217f7)) {
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33 | t = expl(x);
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34 | return 0.5*(t + 1/t);
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35 | }
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36 |
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37 | /* |x| > log(LDBL_MAX) or nan */
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38 | t = expl(0.5*x);
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39 | return 0.5*t*t;
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40 | }
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41 | #elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
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42 | // TODO: broken implementation to make things compile
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43 | long double coshl(long double x)
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44 | {
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45 | return cosh(x);
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46 | }
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47 | #endif
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