GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libm/src/k_sinf.c Lines: 0 9 0.0 %
Date: 2017-11-13 Branches: 0 6 0.0 %

Line Branch Exec Source
1
/* k_sinf.c -- float version of k_sin.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
half =  5.0000000000e-01,/* 0x3f000000 */
21
S1  = -1.6666667163e-01, /* 0xbe2aaaab */
22
S2  =  8.3333337680e-03, /* 0x3c088889 */
23
S3  = -1.9841270114e-04, /* 0xb9500d01 */
24
S4  =  2.7557314297e-06, /* 0x3638ef1b */
25
S5  = -2.5050759689e-08, /* 0xb2d72f34 */
26
S6  =  1.5896910177e-10; /* 0x2f2ec9d3 */
27
28
float
29
__kernel_sinf(float x, float y, int iy)
30
{
31
	float z,r,v;
32
	int32_t ix;
33
	GET_FLOAT_WORD(ix,x);
34
	ix &= 0x7fffffff;			/* high word of x */
35
	if(ix<0x32000000)			/* |x| < 2**-27 */
36
	   {if((int)x==0) return x;}		/* generate inexact */
37
	z	=  x*x;
38
	v	=  z*x;
39
	r	=  S2+z*(S3+z*(S4+z*(S5+z*S6)));
40
	if(iy==0) return x+v*(S1+z*r);
41
	else      return x-((z*(half*y-v*r)-y)-v*S1);
42
}