Imported gcc-4.4.3

[msp430-gcc.git] / libjava / java / lang / e_atan2.c

diff --git a/libjava/java/lang/e_atan2.c b/libjava/java/lang/e_atan2.c
deleted file mode 100644 (file)
index c75448d..0000000
--- a/libjava/java/lang/e_atan2.c
+++ /dev/null
@@ -1,131 +0,0 @@
-
-/* @(#)e_atan2.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_atan2(y,x)
- * Method :
- *     1. Reduce y to positive by atan2(y,x)=-atan2(-y,x).
- *     2. Reduce x to positive by (if x and y are unexceptional):
- *             ARG (x+iy) = arctan(y/x)           ... if x > 0,
- *             ARG (x+iy) = pi - arctan[y/(-x)]   ... if x < 0,
- *
- * Special cases:
- *
- *     ATAN2((anything), NaN ) is NaN;
- *     ATAN2(NAN , (anything) ) is NaN;
- *     ATAN2(+-0, +(anything but NaN)) is +-0  ;
- *     ATAN2(+-0, -(anything but NaN)) is +-pi ;
- *     ATAN2(+-(anything but 0 and NaN), 0) is +-pi/2;
- *     ATAN2(+-(anything but INF and NaN), +INF) is +-0 ;
- *     ATAN2(+-(anything but INF and NaN), -INF) is +-pi;
- *     ATAN2(+-INF,+INF ) is +-pi/4 ;
- *     ATAN2(+-INF,-INF ) is +-3pi/4;
- *     ATAN2(+-INF, (anything but,0,NaN, and INF)) is +-pi/2;
- *
- * Constants:
- * The hexadecimal values are the intended ones for the following
- * constants. The decimal values may be used, provided that the
- * compiler will convert from decimal to binary accurately enough
- * to produce the hexadecimal values shown.
- */
-
-#include "fdlibm.h"
-
-#ifndef _DOUBLE_IS_32BITS
-
-#ifdef __STDC__
-static const double
-#else
-static double
-#endif
-tiny  = 1.0e-300,
-zero  = 0.0,
-pi_o_4  = 7.8539816339744827900E-01, /* 0x3FE921FB, 0x54442D18 */
-pi_o_2  = 1.5707963267948965580E+00, /* 0x3FF921FB, 0x54442D18 */
-pi      = 3.1415926535897931160E+00, /* 0x400921FB, 0x54442D18 */
-pi_lo   = 1.2246467991473531772E-16; /* 0x3CA1A626, 0x33145C07 */
-
-#ifdef __STDC__
-       double __ieee754_atan2(double y, double x)
-#else
-       double __ieee754_atan2(y,x)
-       double  y,x;
-#endif
-{
-       double z;
-       int32_t k,m,hx,hy,ix,iy;
-       uint32_t lx,ly;
-
-       EXTRACT_WORDS(hx,lx,x);
-       ix = hx&0x7fffffff;
-       EXTRACT_WORDS(hy,ly,y);
-       iy = hy&0x7fffffff;
-       if(((ix|((lx|-lx)>>31))>0x7ff00000)||
-          ((iy|((ly|-ly)>>31))>0x7ff00000))    /* x or y is NaN */
-          return x+y;
-       if(((hx-0x3ff00000)|lx)==0) return atan(y);   /* x=1.0 */
-       m = ((hy>>31)&1)|((hx>>30)&2);  /* 2*sign(x)+sign(y) */
-
-    /* when y = 0 */
-       if((iy|ly)==0) {
-           switch(m) {
-               case 0:
-               case 1: return y;       /* atan(+-0,+anything)=+-0 */
-               case 2: return  pi+tiny;/* atan(+0,-anything) = pi */
-               case 3: return -pi-tiny;/* atan(-0,-anything) =-pi */
-           }
-       }
-    /* when x = 0 */
-       if((ix|lx)==0) return (hy<0)?  -pi_o_2-tiny: pi_o_2+tiny;
-
-    /* when x is INF */
-       if(ix==0x7ff00000) {
-           if(iy==0x7ff00000) {
-               switch(m) {
-                   case 0: return  pi_o_4+tiny;/* atan(+INF,+INF) */
-                   case 1: return -pi_o_4-tiny;/* atan(-INF,+INF) */
-                   case 2: return  3.0*pi_o_4+tiny;/*atan(+INF,-INF)*/
-                   case 3: return -3.0*pi_o_4-tiny;/*atan(-INF,-INF)*/
-               }
-           } else {
-               switch(m) {
-                   case 0: return  zero  ;     /* atan(+...,+INF) */
-                   case 1: return -zero  ;     /* atan(-...,+INF) */
-                   case 2: return  pi+tiny  ;  /* atan(+...,-INF) */
-                   case 3: return -pi-tiny  ;  /* atan(-...,-INF) */
-               }
-           }
-       }
-    /* when y is INF */
-       if(iy==0x7ff00000) return (hy<0)? -pi_o_2-tiny: pi_o_2+tiny;
-
-    /* compute y/x */
-       k = (iy-ix)>>20;
-       if(k > 60) z=pi_o_2+0.5*pi_lo;  /* |y/x| >  2**60 */
-       else if(hx<0&&k<-60) z=0.0;     /* |y|/x < -2**60 */
-       else z=atan(fabs(y/x));         /* safe to do y/x */
-       switch (m) {
-           case 0: return       z  ;   /* atan(+,+) */
-           case 1: {
-                     uint32_t zh;
-                     GET_HIGH_WORD(zh,z);
-                     SET_HIGH_WORD(z,zh ^ 0x80000000);
-                   }
-                   return       z  ;   /* atan(-,+) */
-           case 2: return  pi-(z-pi_lo);/* atan(+,-) */
-           default: /* case 3 */
-                   return  (z-pi_lo)-pi;/* atan(-,-) */
-       }
-}
-
-#endif /* defined(_DOUBLE_IS_32BITS) */