[cmucl-commit] [git] CMU Common Lisp branch master updated. snapshot-2014-06-4-g1b9697d

Raymond Toy rtoy at common-lisp.net
Mon Jul 21 04:00:56 UTC 2014


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- Log -----------------------------------------------------------------
commit 1b9697d7923b1e9f7d875b94a13e427ddc651453
Author: Raymond Toy <toy.raymond at gmail.com>
Date:   Sun Jul 20 21:00:47 2014 -0700

    Update to use unions, using the style of e_rem_pio2.c.

diff --git a/src/lisp/k_cos.c b/src/lisp/k_cos.c
index 7fb855d..2be76e0 100644
--- a/src/lisp/k_cos.c
+++ b/src/lisp/k_cos.c
@@ -70,7 +70,10 @@ C6  = -1.13596475577881948265e-11; /* 0xBDA8FAE9, 0xBE8838D4 */
 {
 	double a,hz,z,r,qx;
 	int ix;
-	ix = __HI(x)&0x7fffffff;	/* ix = |x|'s high word*/
+	union { int i[2]; double d; } ux;
+
+        ux.d = x;
+	ix = ux.i[HIWORD]&0x7fffffff;	/* ix = |x|'s high word*/
 	if(ix<0x3e400000) {			/* if x < 2**27 */
 	    if(((int)x)==0) return one;		/* generate inexact */
 	}
@@ -82,8 +85,9 @@ C6  = -1.13596475577881948265e-11; /* 0xBDA8FAE9, 0xBE8838D4 */
 	    if(ix > 0x3fe90000) {		/* x > 0.78125 */
 		qx = 0.28125;
 	    } else {
-	        __HI(qx) = ix-0x00200000;	/* x/4 */
-	        __LO(qx) = 0;
+                ux.i[HIWORD] = ix-0x00200000;
+                ux.i[LOWORD] = 0;
+                qx = ux.d;
 	    }
 	    hz = 0.5*z-qx;
 	    a  = one-qx;
diff --git a/src/lisp/k_sin.c b/src/lisp/k_sin.c
index dfcad76..dd660af 100644
--- a/src/lisp/k_sin.c
+++ b/src/lisp/k_sin.c
@@ -63,7 +63,10 @@ S6  =  1.58969099521155010221e-10; /* 0x3DE5D93A, 0x5ACFD57C */
 {
 	double z,r,v;
 	int ix;
-	ix = __HI(x)&0x7fffffff;	/* high word of x */
+	union { int i[2]; double d; } ux;
+
+        ux.d = x;
+	ix = ux.i[HIWORD]&0x7fffffff;	/* high word of x */
 	if(ix<0x3e400000)			/* |x| < 2**-27 */
 	   {if((int)x==0) return x;}		/* generate inexact */
 	z	=  x*x;
diff --git a/src/lisp/k_tan.c b/src/lisp/k_tan.c
index 017c1e5..10fa562 100644
--- a/src/lisp/k_tan.c
+++ b/src/lisp/k_tan.c
@@ -1,5 +1,3 @@
-#pragma ident "@(#)k_tan.c 1.5 04/04/22 SMI"
-
 /*
  * ====================================================
  * Copyright 2004 Sun Microsystems, Inc.  All Rights Reserved.
@@ -74,12 +72,14 @@ double
 __kernel_tan(double x, double y, int iy) {
 	double z, r, v, w, s;
 	int ix, hx;
+	union { int i[2]; double d; } ux,uz;
 
-	hx = __HI(x);		/* high word of x */
+        ux.d = x;
+	hx = ux.i[HIWORD];		/* high word of x */
 	ix = hx & 0x7fffffff;			/* high word of |x| */
 	if (ix < 0x3e300000) {			/* x < 2**-28 */
 		if ((int) x == 0) {		/* generate inexact */
-			if (((ix | __LO(x)) | (iy + 1)) == 0)
+			if (((ix | ux.i[LOWORD]) | (iy + 1)) == 0)
 				return one / fabs(x);
 			else {
 				if (iy == 1)
@@ -88,10 +88,16 @@ __kernel_tan(double x, double y, int iy) {
 					double a, t;
 
 					z = w = x + y;
-					__LO(z) = 0;
+                                        uz.d = z;
+					uz.i[LOWORD] = 0;
+                                        z = ux.d;
+                                        
 					v = y - (z - x);
 					t = a = -one / w;
-					__LO(t) = 0;
+                                        uz.d = t;
+                                        uz.i[LOWORD] = 0;
+                                        t = uz.d;
+                                        
 					s = one + t * z;
 					return t + a * (s + t * v);
 				}
@@ -138,10 +144,14 @@ __kernel_tan(double x, double y, int iy) {
 		/* compute -1.0 / (x+r) accurately */
 		double a, t;
 		z = w;
-		__LO(z) = 0;
+                uz.d = z;
+                uz.i[LOWORD] = 0;
+                z = uz.d;
 		v = r - (z - x);	/* z+v = r+x */
 		t = a = -1.0 / w;	/* a = -1.0/w */
-		__LO(t) = 0;
+                uz.d = t;
+                uz.i[LOWORD] = 0;
+                t = uz.d;
 		s = 1.0 + t * z;
 		return t + a * (s + t * v);
 	}
diff --git a/src/lisp/s_cos.c b/src/lisp/s_cos.c
index 3bab516..a897133 100644
--- a/src/lisp/s_cos.c
+++ b/src/lisp/s_cos.c
@@ -53,9 +53,12 @@
 {
 	double y[2],z=0.0;
 	int n, ix;
+	union { int i[2]; double d; } ux;
 
     /* High word of x. */
-	ix = __HI(x);
+        ux.d = x;
+        ix = ux.i[HIWORD];
+        
 
     /* |x| ~< pi/4 */
 	ix &= 0x7fffffff;
diff --git a/src/lisp/s_sin.c b/src/lisp/s_sin.c
index 43394e5..1dba1c8 100644
--- a/src/lisp/s_sin.c
+++ b/src/lisp/s_sin.c
@@ -53,9 +53,11 @@
 {
 	double y[2],z=0.0;
 	int n, ix;
-
+	union { int i[2]; double d; } ux;
+        
     /* High word of x. */
-	ix = __HI(x);
+        ux.d = x;
+	ix = ux.i[HIWORD];
 
     /* |x| ~< pi/4 */
 	ix &= 0x7fffffff;
diff --git a/src/lisp/s_tan.c b/src/lisp/s_tan.c
index 1f5564b..4761a4c 100644
--- a/src/lisp/s_tan.c
+++ b/src/lisp/s_tan.c
@@ -52,9 +52,11 @@
 {
 	double y[2],z=0.0;
 	int n, ix;
+	union { int i[2]; double d; } ux;
 
     /* High word of x. */
-	ix = __HI(x);
+        ux.d = x;
+        ix = ux.i[HIWORD];
 
     /* |x| ~< pi/4 */
 	ix &= 0x7fffffff;

-----------------------------------------------------------------------

Summary of changes:
 src/lisp/k_cos.c |   10 +++++++---
 src/lisp/k_sin.c |    5 ++++-
 src/lisp/k_tan.c |   26 ++++++++++++++++++--------
 src/lisp/s_cos.c |    5 ++++-
 src/lisp/s_sin.c |    6 ++++--
 src/lisp/s_tan.c |    4 +++-
 6 files changed, 40 insertions(+), 16 deletions(-)


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