Imported gcc-4.4.3

[msp430-gcc.git] / libjava / java / lang / e_acos.c

diff --git a/libjava/java/lang/e_acos.c b/libjava/java/lang/e_acos.c
deleted file mode 100644 (file)
index ee6b168..0000000
--- a/libjava/java/lang/e_acos.c
+++ /dev/null
@@ -1,111 +0,0 @@
-
-/* @(#)e_acos.c 5.1 93/09/24 */
-/*
- * ====================================================
- * 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.
- * ====================================================
- */
-
-/* __ieee754_acos(x)
- * Method :
- *     acos(x)  = pi/2 - asin(x)
- *     acos(-x) = pi/2 + asin(x)
- * For |x|<=0.5
- *     acos(x) = pi/2 - (x + x*x^2*R(x^2))     (see asin.c)
- * For x>0.5
- *     acos(x) = pi/2 - (pi/2 - 2asin(sqrt((1-x)/2)))
- *             = 2asin(sqrt((1-x)/2))
- *             = 2s + 2s*z*R(z)        ...z=(1-x)/2, s=sqrt(z)
- *             = 2f + (2c + 2s*z*R(z))
- *     where f=hi part of s, and c = (z-f*f)/(s+f) is the correction term
- *     for f so that f+c ~ sqrt(z).
- * For x<-0.5
- *     acos(x) = pi - 2asin(sqrt((1-|x|)/2))
- *             = pi - 0.5*(s+s*z*R(z)), where z=(1-|x|)/2,s=sqrt(z)
- *
- * Special cases:
- *     if x is NaN, return x itself;
- *     if |x|>1, return NaN with invalid signal.
- *
- * Function needed: sqrt
- */
-
-#include "fdlibm.h"
-
-#ifndef _DOUBLE_IS_32BITS
-
-#ifdef __STDC__
-static const double
-#else
-static double
-#endif
-one=  1.00000000000000000000e+00, /* 0x3FF00000, 0x00000000 */
-pi =  3.14159265358979311600e+00, /* 0x400921FB, 0x54442D18 */
-pio2_hi =  1.57079632679489655800e+00, /* 0x3FF921FB, 0x54442D18 */
-pio2_lo =  6.12323399573676603587e-17, /* 0x3C91A626, 0x33145C07 */
-pS0 =  1.66666666666666657415e-01, /* 0x3FC55555, 0x55555555 */
-pS1 = -3.25565818622400915405e-01, /* 0xBFD4D612, 0x03EB6F7D */
-pS2 =  2.01212532134862925881e-01, /* 0x3FC9C155, 0x0E884455 */
-pS3 = -4.00555345006794114027e-02, /* 0xBFA48228, 0xB5688F3B */
-pS4 =  7.91534994289814532176e-04, /* 0x3F49EFE0, 0x7501B288 */
-pS5 =  3.47933107596021167570e-05, /* 0x3F023DE1, 0x0DFDF709 */
-qS1 = -2.40339491173441421878e+00, /* 0xC0033A27, 0x1C8A2D4B */
-qS2 =  2.02094576023350569471e+00, /* 0x40002AE5, 0x9C598AC8 */
-qS3 = -6.88283971605453293030e-01, /* 0xBFE6066C, 0x1B8D0159 */
-qS4 =  7.70381505559019352791e-02; /* 0x3FB3B8C5, 0xB12E9282 */
-
-#ifdef __STDC__
-       double __ieee754_acos(double x)
-#else
-       double __ieee754_acos(x)
-       double x;
-#endif
-{
-       double z,p,q,r,w,s,c,df;
-       int32_t hx,ix;
-       GET_HIGH_WORD(hx,x);
-       ix = hx&0x7fffffff;
-       if(ix>=0x3ff00000) {    /* |x| >= 1 */
-           uint32_t lx;
-           GET_LOW_WORD(lx,x);
-           if(((ix-0x3ff00000)|lx)==0) {       /* |x|==1 */
-               if(hx>0) return 0.0;            /* acos(1) = 0  */
-               else return pi+2.0*pio2_lo;     /* acos(-1)= pi */
-           }
-           return (x-x)/(x-x);         /* acos(|x|>1) is NaN */
-       }
-       if(ix<0x3fe00000) {     /* |x| < 0.5 */
-           if(ix<=0x3c600000) return pio2_hi+pio2_lo;/*if|x|<2**-57*/
-           z = x*x;
-           p = z*(pS0+z*(pS1+z*(pS2+z*(pS3+z*(pS4+z*pS5)))));
-           q = one+z*(qS1+z*(qS2+z*(qS3+z*qS4)));
-           r = p/q;
-           return pio2_hi - (x - (pio2_lo-x*r));
-       } else  if (hx<0) {             /* x < -0.5 */
-           z = (one+x)*0.5;
-           p = z*(pS0+z*(pS1+z*(pS2+z*(pS3+z*(pS4+z*pS5)))));
-           q = one+z*(qS1+z*(qS2+z*(qS3+z*qS4)));
-           s = __ieee754_sqrt(z);
-           r = p/q;
-           w = r*s-pio2_lo;
-           return pi - 2.0*(s+w);
-       } else {                        /* x > 0.5 */
-           z = (one-x)*0.5;
-           s = __ieee754_sqrt(z);
-           df = s;
-           SET_LOW_WORD(df,0);
-           c  = (z-df*df)/(s+df);
-           p = z*(pS0+z*(pS1+z*(pS2+z*(pS3+z*(pS4+z*pS5)))));
-           q = one+z*(qS1+z*(qS2+z*(qS3+z*qS4)));
-           r = p/q;
-           w = r*s+c;
-           return 2.0*(df+w);
-       }
-}
-
-#endif /* defined(_DOUBLE_IS_32BITS) */