GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libm/src/k_cosf.c Lines: 0 14 0.0 %
Date: 2017-11-13 Branches: 0 8 0.0 %

Line Branch Exec Source
1
/* k_cosf.c -- float version of k_cos.c
2
 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3
 */
4
5
/*
6
 * ====================================================
7
 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8
 *
9
 * Developed at SunPro, a Sun Microsystems, Inc. business.
10
 * Permission to use, copy, modify, and distribute this
11
 * software is freely granted, provided that this notice
12
 * is preserved.
13
 * ====================================================
14
 */
15
16
#include "math.h"
17
#include "math_private.h"
18
19
static const float
20
one =  1.0000000000e+00, /* 0x3f800000 */
21
C1  =  4.1666667908e-02, /* 0x3d2aaaab */
22
C2  = -1.3888889225e-03, /* 0xbab60b61 */
23
C3  =  2.4801587642e-05, /* 0x37d00d01 */
24
C4  = -2.7557314297e-07, /* 0xb493f27c */
25
C5  =  2.0875723372e-09, /* 0x310f74f6 */
26
C6  = -1.1359647598e-11; /* 0xad47d74e */
27
28
float
29
__kernel_cosf(float x, float y)
30
{
31
	float a,hz,z,r,qx;
32
	int32_t ix;
33
	GET_FLOAT_WORD(ix,x);
34
	ix &= 0x7fffffff;			/* ix = |x|'s high word*/
35
	if(ix<0x32000000) {			/* if x < 2**27 */
36
	    if(((int)x)==0) return one;		/* generate inexact */
37
	}
38
	z  = x*x;
39
	r  = z*(C1+z*(C2+z*(C3+z*(C4+z*(C5+z*C6)))));
40
	if(ix < 0x3e99999a) 			/* if |x| < 0.3 */
41
	    return one - ((float)0.5*z - (z*r - x*y));
42
	else {
43
	    if(ix > 0x3f480000) {		/* x > 0.78125 */
44
		qx = (float)0.28125;
45
	    } else {
46
	        SET_FLOAT_WORD(qx,ix-0x01000000);	/* x/4 */
47
	    }
48
	    hz = (float)0.5*z-qx;
49
	    a  = one-qx;
50
	    return a - (hz - (z*r-x*y));
51
	}
52
}