X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/f77d20bd14a5cb546343e1fb2cf785c1cfb9c2a4..7e3eac84dfa7f4cfc34428e31003a9e3a5895349:/usr/src/lib/libm/ieee/cabs.c

diff --git a/usr/src/lib/libm/ieee/cabs.c b/usr/src/lib/libm/ieee/cabs.c
index ba040efa46..d60343f4d3 100644
--- a/usr/src/lib/libm/ieee/cabs.c
+++ b/usr/src/lib/libm/ieee/cabs.c
@@ -1,41 +1,18 @@
-/* 
+/*
  * Copyright (c) 1985 Regents of the University of California.
- * 
- * Use and reproduction of this software are granted  in  accordance  with
- * the terms and conditions specified in  the  Berkeley  Software  License
- * Agreement (in particular, this entails acknowledgement of the programs'
- * source, and inclusion of this notice) with the additional understanding
- * that  all  recipients  should regard themselves as participants  in  an
- * ongoing  research  project and hence should  feel  obligated  to report
- * their  experiences (good or bad) with these elementary function  codes,
- * using "sendbug 4bsd-bugs@BERKELEY", to the authors.
- */
-
-#ifndef lint
-static char sccsid[] =
-"@(#)cabs.c	1.2 (Berkeley) 8/21/85; 1.4 (ucb.elefunt) %G%";
-#endif not lint
-
-/* CABS(Z)
- * RETURN THE ABSOLUTE VALUE OF THE COMPLEX NUMBER  Z = X + iY
- * DOUBLE PRECISION (VAX D format 56 bits, IEEE DOUBLE 53 BITS)
- * CODED IN C BY K.C. NG, 11/28/84.
- * REVISED BY K.C. NG, 7/12/85.
+ * All rights reserved.
  *
- * Required kernel function :
- *	hypot(x,y)
+ * %sccs.include.redist.c%
  *
- * Method :
- *	cabs(z) = hypot(x,y) .
+ * All recipients should regard themselves as participants in an ongoing
+ * research project and hence should feel obligated to report their
+ * experiences (good or bad) with these elementary function codes, using
+ * the sendbug(8) program, to the authors.
  */
 
-double cabs(z)
-struct { double x, y;} z;
-{
-	double hypot();
-	return(hypot(z.x,z.y));
-}
-
+#ifndef lint
+static char sccsid[] = "@(#)cabs.c	5.5 (Berkeley) %G%";
+#endif /* not lint */
 
 /* HYPOT(X,Y)
  * RETURN THE SQUARE ROOT OF X^2 + Y^2  WHERE Z=X+iY
@@ -89,38 +66,31 @@ struct { double x, y;} z;
  * from decimal to binary accurately enough to produce the hexadecimal values
  * shown.
  */
+#include "mathimpl.h"
+
+vc(r2p1hi, 2.4142135623730950345E0   ,8279,411a,ef32,99fc,   2, .9A827999FCEF32)
+vc(r2p1lo, 1.4349369327986523769E-17 ,597d,2484,754b,89b3, -55, .84597D89B3754B)
+vc(sqrt2,  1.4142135623730950622E0   ,04f3,40b5,de65,33f9,   1, .B504F333F9DE65)
 
-#if (defined(VAX)||defined(TAHOE))	/* VAX D format */
-#ifdef VAX
-#define _0x(A,B)	0x/**/A/**/B
-#else	/* VAX */
-#define _0x(A,B)	0x/**/B/**/A
-#endif	/* VAX */
-/* static double */
-/* r2p1hi =  2.4142135623730950345E0     , Hex  2^  2   *  .9A827999FCEF32 */
-/* r2p1lo =  1.4349369327986523769E-17   , Hex  2^-55   *  .84597D89B3754B */
-/* sqrt2  =  1.4142135623730950622E0     ; Hex  2^  1   *  .B504F333F9DE65 */
-static long    r2p1hix[] = { _0x(8279,411a), _0x(ef32,99fc)};
-static long    r2p1lox[] = { _0x(597d,2484), _0x(754b,89b3)};
-static long     sqrt2x[] = { _0x(04f3,40b5), _0x(de65,33f9)};
-#define   r2p1hi    (*(double*)r2p1hix)
-#define   r2p1lo    (*(double*)r2p1lox)
-#define    sqrt2    (*(double*)sqrt2x)
-#else		/* IEEE double format */
-static double
-r2p1hi =  2.4142135623730949234E0     , /*Hex  2^1     *  1.3504F333F9DE6 */
-r2p1lo =  1.2537167179050217666E-16   , /*Hex  2^-53   *  1.21165F626CDD5 */
-sqrt2  =  1.4142135623730951455E0     ; /*Hex  2^  0   *  1.6A09E667F3BCD */
+ic(r2p1hi, 2.4142135623730949234E0   ,   1, 1.3504F333F9DE6)
+ic(r2p1lo, 1.2537167179050217666E-16 , -53, 1.21165F626CDD5)
+ic(sqrt2,  1.4142135623730951455E0   ,   0, 1.6A09E667F3BCD)
+
+#ifdef vccast
+#define	r2p1hi	vccast(r2p1hi)
+#define	r2p1lo	vccast(r2p1lo)
+#define	sqrt2	vccast(sqrt2)
 #endif
 
-double hypot(x,y)
+double
+hypot(x,y)
 double x, y;
 {
-	static double zero=0, one=1, 
+	static const double zero=0, one=1, 
 		      small=1.0E-18;	/* fl(1+small)==1 */
-	static ibig=30;	/* fl(1+2**(2*ibig))==1 */
-	double copysign(),scalb(),logb(),sqrt(),t,r;
-	int finite(), exp;
+	static const ibig=30;	/* fl(1+2**(2*ibig))==1 */
+	double t,r;
+	int exp;
 
 	if(finite(x))
 	    if(finite(y))
@@ -160,20 +130,49 @@ double x, y;
 	         return (copysign(x,one));
 	else if(finite(y))
 	         return(x);		   /* x is NaN, y is finite */
+#if !defined(vax)&&!defined(tahoe)
 	else if(y!=y) return(y);  /* x and y is NaN */
+#endif	/* !defined(vax)&&!defined(tahoe) */
 	else return(copysign(y,one));   /* y is INF */
 }
 
+/* CABS(Z)
+ * RETURN THE ABSOLUTE VALUE OF THE COMPLEX NUMBER  Z = X + iY
+ * DOUBLE PRECISION (VAX D format 56 bits, IEEE DOUBLE 53 BITS)
+ * CODED IN C BY K.C. NG, 11/28/84.
+ * REVISED BY K.C. NG, 7/12/85.
+ *
+ * Required kernel function :
+ *	hypot(x,y)
+ *
+ * Method :
+ *	cabs(z) = hypot(x,y) .
+ */
+
+double
+cabs(z)
+struct { double x, y;} z;
+{
+	return hypot(z.x,z.y);
+}
+
+double
+z_abs(z)
+struct { double x,y;} *z;
+{
+	return hypot(z->x,z->y);
+}
+
 /* A faster but less accurate version of cabs(x,y) */
 #if 0
 double hypot(x,y)
 double x, y;
 {
-	static double zero=0, one=1;
+	static const double zero=0, one=1;
 		      small=1.0E-18;	/* fl(1+small)==1 */
-	static ibig=30;	/* fl(1+2**(2*ibig))==1 */
-	double copysign(),scalb(),logb(),sqrt(),temp;
-	int finite(), exp;
+	static const ibig=30;	/* fl(1+2**(2*ibig))==1 */
+	double temp;
+	int exp;
 
 	if(finite(x))
 	    if(finite(y))