From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 19:32:43 +0200 Subject: Adding upstream version 1:115.7.0. Signed-off-by: Daniel Baumann --- modules/fdlibm/src/s_cosf.cpp | 86 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 86 insertions(+) create mode 100644 modules/fdlibm/src/s_cosf.cpp (limited to 'modules/fdlibm/src/s_cosf.cpp') diff --git a/modules/fdlibm/src/s_cosf.cpp b/modules/fdlibm/src/s_cosf.cpp new file mode 100644 index 0000000000..324d849671 --- /dev/null +++ b/modules/fdlibm/src/s_cosf.cpp @@ -0,0 +1,86 @@ +/* s_cosf.c -- float version of s_cos.c. + * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. + * Optimized by Bruce D. Evans. + */ + +/* + * ==================================================== + * 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. + * ==================================================== + */ + +//#include +//__FBSDID("$FreeBSD$"); + +#include + +#define INLINE_KERNEL_COSDF +#define INLINE_KERNEL_SINDF +#define INLINE_REM_PIO2F +#include "math_private.h" +#include "e_rem_pio2f.cpp" +#include "k_cosf.cpp" +#include "k_sinf.cpp" + +/* Small multiples of pi/2 rounded to double precision. */ +static const double +c1pio2 = 1*M_PI_2, /* 0x3FF921FB, 0x54442D18 */ +c2pio2 = 2*M_PI_2, /* 0x400921FB, 0x54442D18 */ +c3pio2 = 3*M_PI_2, /* 0x4012D97C, 0x7F3321D2 */ +c4pio2 = 4*M_PI_2; /* 0x401921FB, 0x54442D18 */ + +float +cosf(float x) +{ + double y; + int32_t n, hx, ix; + + GET_FLOAT_WORD(hx,x); + ix = hx & 0x7fffffff; + + if(ix <= 0x3f490fda) { /* |x| ~<= pi/4 */ + if(ix<0x39800000) /* |x| < 2**-12 */ + if(((int)x)==0) return 1.0; /* 1 with inexact if x != 0 */ + return __kernel_cosdf(x); + } + if(ix<=0x407b53d1) { /* |x| ~<= 5*pi/4 */ + if(ix>0x4016cbe3) /* |x| ~> 3*pi/4 */ + return -__kernel_cosdf(x + (hx > 0 ? -c2pio2 : c2pio2)); + else { + if(hx>0) + return __kernel_sindf(c1pio2 - x); + else + return __kernel_sindf(x + c1pio2); + } + } + if(ix<=0x40e231d5) { /* |x| ~<= 9*pi/4 */ + if(ix>0x40afeddf) /* |x| ~> 7*pi/4 */ + return __kernel_cosdf(x + (hx > 0 ? -c4pio2 : c4pio2)); + else { + if(hx>0) + return __kernel_sindf(x - c3pio2); + else + return __kernel_sindf(-c3pio2 - x); + } + } + + /* cos(Inf or NaN) is NaN */ + else if (ix>=0x7f800000) return x-x; + + /* general argument reduction needed */ + else { + n = __ieee754_rem_pio2f(x,&y); + switch(n&3) { + case 0: return __kernel_cosdf(y); + case 1: return __kernel_sindf(-y); + case 2: return -__kernel_cosdf(y); + default: + return __kernel_sindf(y); + } + } +} -- cgit v1.2.3