diff options
Diffstat (limited to 'src/math/__sinl.c')
| -rw-r--r-- | src/math/__sinl.c | 36 |
1 files changed, 32 insertions, 4 deletions
diff --git a/src/math/__sinl.c b/src/math/__sinl.c index 068adffb..2525bbe8 100644 --- a/src/math/__sinl.c +++ b/src/math/__sinl.c @@ -1,4 +1,5 @@ /* origin: FreeBSD /usr/src/lib/msun/ld80/k_sinl.c */ +/* origin: FreeBSD /usr/src/lib/msun/ld128/k_sinl.c */ /* * ==================================================== * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. @@ -13,7 +14,8 @@ #include "libm.h" -#if LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 +#if (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384 +#if LDBL_MANT_DIG == 64 /* * ld80 version of __sin.c. See __sin.c for most comments. */ @@ -23,10 +25,8 @@ * * See __cosl.c for more details about the polynomial. */ - static const long double S1 = -0.166666666666666666671L; /* -0xaaaaaaaaaaaaaaab.0p-66 */ - static const double S2 = 0.0083333333333333332, /* 0x11111111111111.0p-59 */ S3 = -0.00019841269841269427, /* -0x1a01a01a019f81.0p-65 */ @@ -35,6 +35,34 @@ S5 = -0.000000025052108218074604, /* -0x1ae64564f16cad.0p-78 */ S6 = 1.6059006598854211e-10, /* 0x161242b90243b5.0p-85 */ S7 = -7.6429779983024564e-13, /* -0x1ae42ebd1b2e00.0p-93 */ S8 = 2.6174587166648325e-15; /* 0x179372ea0b3f64.0p-101 */ +#define POLY(z) (S2+z*(S3+z*(S4+z*(S5+z*(S6+z*(S7+z*S8)))))) +#elif LDBL_MANT_DIG == 113 +/* + * ld128 version of __sin.c. See __sin.c for most comments. + */ +/* + * Domain [-0.7854, 0.7854], range ~[-1.53e-37, 1.659e-37] + * |sin(x)/x - s(x)| < 2**-122.1 + * + * See __cosl.c for more details about the polynomial. + */ +static const long double +S1 = -0.16666666666666666666666666666666666606732416116558L, +S2 = 0.0083333333333333333333333333333331135404851288270047L, +S3 = -0.00019841269841269841269841269839935785325638310428717L, +S4 = 0.27557319223985890652557316053039946268333231205686e-5L, +S5 = -0.25052108385441718775048214826384312253862930064745e-7L, +S6 = 0.16059043836821614596571832194524392581082444805729e-9L, +S7 = -0.76471637318198151807063387954939213287488216303768e-12L, +S8 = 0.28114572543451292625024967174638477283187397621303e-14L; +static const double +S9 = -0.82206352458348947812512122163446202498005154296863e-17, +S10 = 0.19572940011906109418080609928334380560135358385256e-19, +S11 = -0.38680813379701966970673724299207480965452616911420e-22, +S12 = 0.64038150078671872796678569586315881020659912139412e-25; +#define POLY(z) (S2+z*(S3+z*(S4+z*(S5+z*(S6+z*(S7+z*(S8+ \ + z*(S9+z*(S10+z*(S11+z*S12)))))))))) +#endif long double __sinl(long double x, long double y, int iy) { @@ -42,7 +70,7 @@ long double __sinl(long double x, long double y, int iy) z = x*x; v = z*x; - r = S2+z*(S3+z*(S4+z*(S5+z*(S6+z*(S7+z*S8))))); + r = POLY(z); if (iy == 0) return x+v*(S1+z*r); return x-((z*(0.5*y-v*r)-y)-v*S1); |