test: Fix math .c dependency

[uclinux-h8/uClibc.git] / libm / e_atan2.c

diff --git a/libm/e_atan2.c b/libm/e_atan2.c
index 920cfaf..ef7ffa9 100644 (file)
--- a/libm/e_atan2.c
+++ b/libm/e_atan2.c
@@ -1,23 +1,18 @@
-/* @(#)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 
+ * software is freely granted, provided that this notice
  * is preserved.
  * ====================================================
  */
 
-#if defined(LIBM_SCCS) && !defined(lint)
-static char rcsid[] = "$NetBSD: e_atan2.c,v 1.8 1995/05/10 20:44:51 jtc Exp $";
-#endif
-
 /* __ieee754_atan2(y,x)
  * Method :
  *     1. Reduce y to positive by atan2(y,x)=-atan2(-y,x).
- *     2. Reduce x to positive by (if x and y are unexceptional): 
+ *     2. Reduce x to positive by (if x and y are unexceptional):
  *             ARG (x+iy) = arctan(y/x)           ... if x > 0,
  *             ARG (x+iy) = pi - arctan[y/(-x)]   ... if x < 0,
  *
@@ -35,20 +30,16 @@ static char rcsid[] = "$NetBSD: e_atan2.c,v 1.8 1995/05/10 20:44:51 jtc Exp $";
  *     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 
+ * 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 "math.h"
 #include "math_private.h"
 
-#ifdef __STDC__
-static const double 
-#else
-static double 
-#endif
+static const double
 tiny  = 1.0e-300,
 zero  = 0.0,
 pi_o_4  = 7.8539816339744827900E-01, /* 0x3FE921FB, 0x54442D18 */
@@ -56,13 +47,8 @@ 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 __ieee754_atan2(double y, double x)
+{
        double z;
        int32_t k,m,hx,hy,ix,iy;
        u_int32_t lx,ly;
@@ -74,13 +60,13 @@ pi_lo   = 1.2246467991473531772E-16; /* 0x3CA1A626, 0x33145C07 */
        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 */
+       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 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 */
@@ -88,7 +74,7 @@ pi_lo   = 1.2246467991473531772E-16; /* 0x3CA1A626, 0x33145C07 */
        }
     /* 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) {
@@ -128,3 +114,21 @@ pi_lo   = 1.2246467991473531772E-16; /* 0x3CA1A626, 0x33145C07 */
                    return  (z-pi_lo)-pi;/* atan(-,-) */
        }
 }
+
+/*
+ * wrapper atan2(y,x)
+ */
+#ifndef _IEEE_LIBM
+double atan2(double y, double x)
+{
+       double z = __ieee754_atan2(y, x);
+       if (_LIB_VERSION == _IEEE_ || isnan(x) || isnan(y))
+               return z;
+       if (x == 0.0 && y == 0.0)
+               return __kernel_standard(y,x,3); /* atan2(+-0,+-0) */
+       return z;
+}
+#else
+strong_alias(__ieee754_atan2, atan2)
+#endif
+libm_hidden_def(atan2)