diff options
Diffstat (limited to 'lib/msun/src/k_sincosf.h')
| -rw-r--r-- | lib/msun/src/k_sincosf.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/lib/msun/src/k_sincosf.h b/lib/msun/src/k_sincosf.h new file mode 100644 index 0000000..073986d --- /dev/null +++ b/lib/msun/src/k_sincosf.h @@ -0,0 +1,43 @@ +/*- + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunPro, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + * + * k_sinf.c and k_cosf.c merged by Steven G. Kargl. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* |sin(x)/x - s(x)| < 2**-37.5 (~[-4.89e-12, 4.824e-12]). */ +static const double +S1 = -0x15555554cbac77.0p-55, /* -0.166666666416265235595 */ +S2 = 0x111110896efbb2.0p-59, /* 0.0083333293858894631756 */ +S3 = -0x1a00f9e2cae774.0p-65, /* -0.000198393348360966317347 */ +S4 = 0x16cd878c3b46a7.0p-71; /* 0.0000027183114939898219064 */ + +/* |cos(x) - c(x)| < 2**-34.1 (~[-5.37e-11, 5.295e-11]). */ +static const double +C0 = -0x1ffffffd0c5e81.0p-54, /* -0.499999997251031003120 */ +C1 = 0x155553e1053a42.0p-57, /* 0.0416666233237390631894 */ +C2 = -0x16c087e80f1e27.0p-62, /* -0.00138867637746099294692 */ +C3 = 0x199342e0ee5069.0p-68; /* 0.0000243904487962774090654 */ + +static inline void +__kernel_sincosdf(double x, float *sn, float *cs) +{ + double r, s, w, z; + + z = x * x; + w = z * z; + r = S3 + z * S4; + s = z * x; + *sn = (x + s * (S1 + z * S2)) + s * w * r; + r = C2 + z * C3; + *cs = ((1 + z * C0) + w * C1) + (w * z) * r; +} |
