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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Property svn:mime-type
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File size:
1.1 KB
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Rev | Line | |
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[352] | 1 | #define _GNU_SOURCE
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| 2 | #include "libm.h"
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| 3 |
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| 4 | #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
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| 5 | void sincosl(long double x, long double *sin, long double *cos)
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| 6 | {
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| 7 | double sind, cosd;
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| 8 | sincos(x, &sind, &cosd);
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| 9 | *sin = sind;
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| 10 | *cos = cosd;
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| 11 | }
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| 12 | #elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
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| 13 | void sincosl(long double x, long double *sin, long double *cos)
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| 14 | {
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| 15 | union ldshape u = {x};
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| 16 | unsigned n;
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| 17 | long double y[2], s, c;
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| 18 |
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| 19 | u.i.se &= 0x7fff;
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| 20 | if (u.i.se == 0x7fff) {
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| 21 | *sin = *cos = x - x;
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| 22 | return;
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| 23 | }
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| 24 | if (u.f < M_PI_4) {
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| 25 | if (u.i.se < 0x3fff - LDBL_MANT_DIG) {
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| 26 | /* raise underflow if subnormal */
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| 27 | if (u.i.se == 0) FORCE_EVAL(x*0x1p-120f);
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| 28 | *sin = x;
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| 29 | /* raise inexact if x!=0 */
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| 30 | *cos = 1.0 + x;
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| 31 | return;
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| 32 | }
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| 33 | *sin = __sinl(x, 0, 0);
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| 34 | *cos = __cosl(x, 0);
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| 35 | return;
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| 36 | }
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| 37 | n = __rem_pio2l(x, y);
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| 38 | s = __sinl(y[0], y[1], 1);
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| 39 | c = __cosl(y[0], y[1]);
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| 40 | switch (n & 3) {
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| 41 | case 0:
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| 42 | *sin = s;
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| 43 | *cos = c;
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| 44 | break;
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| 45 | case 1:
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| 46 | *sin = c;
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| 47 | *cos = -s;
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| 48 | break;
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| 49 | case 2:
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| 50 | *sin = -s;
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| 51 | *cos = -c;
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| 52 | break;
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| 53 | case 3:
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| 54 | default:
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| 55 | *sin = -c;
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| 56 | *cos = s;
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| 57 | break;
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| 58 | }
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| 59 | }
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| 60 | #endif
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