1 files changed, 0 insertions, 85 deletions
diff --git a/src/math/k_cos.c b/src/math/k_cos.c
deleted file mode 100644
index 22e9841e..00000000
--- a/src/math/k_cos.c
+++ /dev/null
@@ -1,85 +0,0 @@
-
-/* @(#)k_cos.c 1.3 95/01/18 */
-/*
- * ====================================================
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
- *
- * Developed at SunSoft, a Sun Microsystems, Inc. business.
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice 
- * is preserved.
- * ====================================================
- */
-
-/*
- * __kernel_cos( x,  y )
- * kernel cos function on [-pi/4, pi/4], pi/4 ~ 0.785398164
- * Input x is assumed to be bounded by ~pi/4 in magnitude.
- * Input y is the tail of x. 
- *
- * Algorithm
- *      1. Since cos(-x) = cos(x), we need only to consider positive x.
- *      2. if x < 2^-27 (hx<0x3e400000 0), return 1 with inexact if x!=0.
- *      3. cos(x) is approximated by a polynomial of degree 14 on
- *         [0,pi/4]
- *                                       4            14
- *              cos(x) ~ 1 - x*x/2 + C1*x + ... + C6*x
- *         where the remez error is
- *      
- *      |              2     4     6     8     10    12     14 |     -58
- *      |cos(x)-(1-.5*x +C1*x +C2*x +C3*x +C4*x +C5*x  +C6*x  )| <= 2
- *      |                                                      | 
- * 
- *                     4     6     8     10    12     14 
- *      4. let r = C1*x +C2*x +C3*x +C4*x +C5*x  +C6*x  , then
- *             cos(x) = 1 - x*x/2 + r
- *         since cos(x+y) ~ cos(x) - sin(x)*y 
- *                        ~ cos(x) - x*y,
- *         a correction term is necessary in cos(x) and hence
- *              cos(x+y) = 1 - (x*x/2 - (r - x*y))
- *         For better accuracy when x > 0.3, let qx = |x|/4 with
- *         the last 32 bits mask off, and if x > 0.78125, let qx = 0.28125.
- *         Then
- *              cos(x+y) = (1-qx) - ((x*x/2-qx) - (r-x*y)).
- *         Note that 1-qx and (x*x/2-qx) is EXACT here, and the
- *         magnitude of the latter is at least a quarter of x*x/2,
- *         thus, reducing the rounding error in the subtraction.
- */
-
-#include <math.h>
-#include "math_private.h"
-
-static const double
-one =  1.00000000000000000000e+00, /* 0x3FF00000, 0x00000000 */
-C1  =  4.16666666666666019037e-02, /* 0x3FA55555, 0x5555554C */
-C2  = -1.38888888888741095749e-03, /* 0xBF56C16C, 0x16C15177 */
-C3  =  2.48015872894767294178e-05, /* 0x3EFA01A0, 0x19CB1590 */
-C4  = -2.75573143513906633035e-07, /* 0xBE927E4F, 0x809C52AD */
-C5  =  2.08757232129817482790e-09, /* 0x3E21EE9E, 0xBDB4B1C4 */
-C6  = -1.13596475577881948265e-11; /* 0xBDA8FAE9, 0xBE8838D4 */
-
-double
-__kernel_cos(double x, double y)
-{
-        double a,hz,z,r,qx;
-        int32_t ix;
-        GET_HIGH_WORD(ix,x);
-        ix &= 0x7fffffff;                       /* ix = |x|'s high word*/
-        if(ix<0x3e400000) {                     /* if x < 2**27 */
-            if(((int)x)==0) return one;         /* generate inexact */
-        }
-        z  = x*x;
-        r  = z*(C1+z*(C2+z*(C3+z*(C4+z*(C5+z*C6)))));
-        if(ix < 0x3FD33333)                     /* if |x| < 0.3 */ 
-            return one - (0.5*z - (z*r - x*y));
-        else {
-            if(ix > 0x3fe90000) {               /* x > 0.78125 */
-                qx = 0.28125;
-            } else {
-                INSERT_WORDS(qx,ix-0x00200000,0);       /* x/4 */
-            }
-            hz = 0.5*z-qx;
-            a  = one-qx;
-            return a - (hz - (z*r-x*y));
-        }
-}