diff options
Diffstat (limited to 'lib/msun/src/k_cosf.c')
| -rw-r--r-- | lib/msun/src/k_cosf.c | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/lib/msun/src/k_cosf.c b/lib/msun/src/k_cosf.c index 4e04fd8..a3bf520 100644 --- a/lib/msun/src/k_cosf.c +++ b/lib/msun/src/k_cosf.c @@ -14,7 +14,7 @@ * ==================================================== */ -#ifndef INLINE_KERNEL_COSF +#ifndef INLINE_KERNEL_COSDF #ifndef lint static char rcsid[] = "$FreeBSD$"; #endif @@ -23,24 +23,23 @@ static char rcsid[] = "$FreeBSD$"; #include "math.h" #include "math_private.h" -/* |cos(x) - c(x)| < 2**-33.1 (~[-9.39e-11, 1.083e-10]). */ -static const float +/* |cos(x) - c(x)| < 2**-34.1 (~[-5.37e-11, 5.295e-11]). */ +static const double one = 1.0, -C1 = 0xaaaaa5.0p-28, /* 0.041666645557 */ -C2 = -0xb60615.0p-33, /* -0.0013887310633 */ -C3 = 0xccf47d.0p-39; /* 0.000024432542887 */ +C0 = -0x1ffffffd0c5e81.0p-54, /* -0.499999997251031003120 */ +C1 = 0x155553e1053a42.0p-57, /* 0.0416666233237390631894 */ +C2 = -0x16c087e80f1e27.0p-62, /* -0.00138867637746099294692 */ +C3 = 0x199342e0ee5069.0p-68; /* 0.0000243904487962774090654 */ -#ifdef INLINE_KERNEL_COSF +#ifdef INLINE_KERNEL_COSDF extern inline #endif float -__kernel_cosf(float x, float y) +__kernel_cosdf(double x) { - float hz,z,r,w; + double z,r; z = x*x; r = z*(C1+z*(C2+z*C3)); - hz = (float)0.5*z; - w = one-hz; - return w + (((one-w)-hz) + (z*r-x*y)); + return (one+z*C0) + z*r; } |
