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
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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:
634 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 tanl(long double x)
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5 | {
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6 | return tan(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 | long double tanl(long double x)
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10 | {
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11 | union ldshape u = {x};
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12 | long double y[2];
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13 | unsigned n;
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14 |
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15 | u.i.se &= 0x7fff;
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16 | if (u.i.se == 0x7fff)
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17 | return x - x;
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18 | if (u.f < M_PI_4) {
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19 | if (u.i.se < 0x3fff - LDBL_MANT_DIG/2) {
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20 | /* raise inexact if x!=0 and underflow if subnormal */
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21 | FORCE_EVAL(u.i.se == 0 ? x*0x1p-120f : x+0x1p120f);
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22 | return x;
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23 | }
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24 | return __tanl(x, 0, 0);
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25 | }
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26 | n = __rem_pio2l(x, y);
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27 | return __tanl(y[0], y[1], n&1);
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28 | }
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29 | #endif
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