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Diffstat (limited to 'REORG.TODO/sysdeps/ieee754/flt-32/s_cosf.c')
| -rw-r--r-- | REORG.TODO/sysdeps/ieee754/flt-32/s_cosf.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/ieee754/flt-32/s_cosf.c b/REORG.TODO/sysdeps/ieee754/flt-32/s_cosf.c new file mode 100644 index 0000000000..0affd406bb --- /dev/null +++ b/REORG.TODO/sysdeps/ieee754/flt-32/s_cosf.c @@ -0,0 +1,63 @@ +/* s_cosf.c -- float version of s_cos.c. + * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. + */ + +/* + * ==================================================== + * 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. + * ==================================================== + */ + +#if defined(LIBM_SCCS) && !defined(lint) +static char rcsid[] = "$NetBSD: s_cosf.c,v 1.4 1995/05/10 20:47:03 jtc Exp $"; +#endif + +#include <errno.h> +#include <math.h> +#include <math_private.h> + +#ifndef COSF +# define COSF_FUNC __cosf +#else +# define COSF_FUNC COSF +#endif + +float COSF_FUNC(float x) +{ + float y[2],z=0.0; + int32_t n,ix; + + GET_FLOAT_WORD(ix,x); + + /* |x| ~< pi/4 */ + ix &= 0x7fffffff; + if(ix <= 0x3f490fd8) return __kernel_cosf(x,z); + + /* cos(Inf or NaN) is NaN */ + else if (ix>=0x7f800000) { + if (ix == 0x7f800000) + __set_errno (EDOM); + return x-x; + } + + /* argument reduction needed */ + else { + n = __ieee754_rem_pio2f(x,y); + switch(n&3) { + case 0: return __kernel_cosf(y[0],y[1]); + case 1: return -__kernel_sinf(y[0],y[1],1); + case 2: return -__kernel_cosf(y[0],y[1]); + default: + return __kernel_sinf(y[0],y[1],1); + } + } +} + +#ifndef COSF +weak_alias (__cosf, cosf) +#endif |