ea9bb95a5b
ld128 support was added to internal kernel functions (__cosl, __sinl, __tanl, __rem_pio2l) from freebsd (not tested, but should be a good start for when ld128 arch arrives) __rem_pio2l had some code cleanup, the freebsd ld128 code seems to gather the results of a large reduction with precision loss (fixed the bug but a todo comment was added for later investigation) the old copyright was removed from the non-kernel wrapper functions (cosl, sinl, sincosl, tanl) since these are trivial and the interesting parts and comments had been already rewritten.
29 lines
634 B
C
29 lines
634 B
C
#include "libm.h"
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#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
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long double tanl(long double x)
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{
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return tan(x);
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}
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#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
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long double tanl(long double x)
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{
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union ldshape u = {x};
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long double y[2];
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unsigned n;
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u.i.se &= 0x7fff;
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if (u.i.se == 0x7fff)
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return x - x;
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if (u.f < M_PI_4) {
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if (u.i.se < 0x3fff - LDBL_MANT_DIG/2) {
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/* raise inexact if x!=0 and underflow if subnormal */
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FORCE_EVAL(u.i.se == 0 ? x*0x1p-120f : x+0x1p120f);
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return x;
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}
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return __tanl(x, 0, 0);
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}
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n = __rem_pio2l(x, y);
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return __tanl(y[0], y[1], n&1);
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}
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#endif
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