From: Jason Wilson <edu/mit/csail/zurich/jawilson>
Date: Fri, 6 Aug 1993 05:44:41 +0000 (+0000)
Subject: Make multiply-fixnum do inline case more often.  Previously we were
X-Git-Tag: 20090517-FFI~8122
X-Git-Url: https://birchwood-abbey.net/git?a=commitdiff_plain;h=a9e99029856a528351cddfe627d7f0aea5a9d1fb;p=mit-scheme.git

Make multiply-fixnum do inline case more often.  Previously we were
being screwed by the CSE.
---

diff --git a/v7/src/compiler/machines/spectrum/rulrew.scm b/v7/src/compiler/machines/spectrum/rulrew.scm
index 5ea2c3f6a..97deaccfe 100644
--- a/v7/src/compiler/machines/spectrum/rulrew.scm
+++ b/v7/src/compiler/machines/spectrum/rulrew.scm
@@ -1,6 +1,6 @@
 #| -*-Scheme-*-
 
-$Id: rulrew.scm,v 1.11 1993/07/07 19:21:26 gjr Exp $
+$Id: rulrew.scm,v 1.12 1993/08/06 05:44:41 jawilson Exp $
 
 Copyright (c) 1990-1993 Massachusetts Institute of Technology
 
@@ -143,12 +143,7 @@ MIT in each case. |#
 		 (? operand-2)
 		 #F)
   (QUALIFIER (and (rtl:register? operand-2)
-		  (rtl:constant-fixnum-test
-		   operand-1
-		   (lambda (n)
-		     (let ((absn (abs n)))
-		       (and (integer-log-base-2? absn)
-			    (<= absn 64)))))))
+		  (rtl:constant-fixnum-test operand-1 spectrum-inline-multiply?)))
   (rtl:make-fixnum-2-args 'MULTIPLY-FIXNUM operand-1 operand-2 #F))
 
 (define-rule rewriting
@@ -157,14 +152,18 @@ MIT in each case. |#
 		 (REGISTER (? operand-2 register-known-value))
 		 #F)
   (QUALIFIER (and (rtl:register? operand-1)
-		  (rtl:constant-fixnum-test
-		   operand-2
-		   (lambda (n)
-		     (let ((absn (abs n)))
-		       (and (integer-log-base-2? absn)
-			    (<= absn 64)))))))
+		  (rtl:constant-fixnum-test operand-2 spectrum-inline-multiply?)))
   (rtl:make-fixnum-2-args 'MULTIPLY-FIXNUM operand-1 operand-2 #F))
 
+(define (spectrum-inline-multiply? n)
+  #|
+  (let ((absn (abs n)))
+    (and (integer-log-base-2? absn)
+	 (<= absn 64)))
+  |#
+  n					; fnord
+  true)
+
 (define-rule rewriting
   (FIXNUM-2-ARGS FIXNUM-QUOTIENT
 		 (? operand-1)