Last change
on this file since 351 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
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text/x-csrc;charset=UTF-8
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File size:
729 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 cosl(long double x) {
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5 | return cos(x);
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6 | }
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7 | #elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
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8 | long double cosl(long double x)
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9 | {
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10 | union ldshape u = {x};
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11 | unsigned n;
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12 | long double y[2], hi, lo;
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13 |
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14 | u.i.se &= 0x7fff;
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15 | if (u.i.se == 0x7fff)
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16 | return x - x;
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17 | x = u.f;
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18 | if (x < M_PI_4) {
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19 | if (u.i.se < 0x3fff - LDBL_MANT_DIG)
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20 | /* raise inexact if x!=0 */
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21 | return 1.0 + x;
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22 | return __cosl(x, 0);
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23 | }
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24 | n = __rem_pio2l(x, y);
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25 | hi = y[0];
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26 | lo = y[1];
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27 | switch (n & 3) {
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28 | case 0:
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29 | return __cosl(hi, lo);
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30 | case 1:
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31 | return -__sinl(hi, lo, 1);
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32 | case 2:
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33 | return -__cosl(hi, lo);
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34 | case 3:
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35 | default:
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36 | return __sinl(hi, lo, 1);
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37 | }
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38 | }
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39 | #endif
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