From: Mark Friedman <edu/mit/csail/zurich/markf>
Date: Thu, 20 Oct 1988 18:24:59 +0000 (+0000)
Subject: Added rule for OVERFLOW-TEST in support of generic arithmetic.
X-Git-Tag: 20090517-FFI~12500
X-Git-Url: https://birchwood-abbey.net/git?a=commitdiff_plain;h=a6f199e476f81cf21e6f599c7cf6ae2c7f28a6d6;p=mit-scheme.git

Added rule for OVERFLOW-TEST in support of generic arithmetic.
---

diff --git a/v7/src/compiler/machines/bobcat/rules2.scm b/v7/src/compiler/machines/bobcat/rules2.scm
index bf866b501..54692a746 100644
--- a/v7/src/compiler/machines/bobcat/rules2.scm
+++ b/v7/src/compiler/machines/bobcat/rules2.scm
@@ -1,6 +1,6 @@
 #| -*-Scheme-*-
 
-$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/compiler/machines/bobcat/rules2.scm,v 4.5 1988/08/29 22:49:54 cph Exp $
+$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/compiler/machines/bobcat/rules2.scm,v 4.6 1988/10/20 18:24:59 markf Exp $
 
 Copyright (c) 1988 Massachusetts Institute of Technology
 
@@ -276,8 +276,8 @@ MIT in each case. |#
   (guarantee-signed-fixnum constant)
   (let ((reference (standard-register-reference register 'DATA)))
     (if (effective-address/register? reference)
-	(LAP (CMP L (& ,constant) ,reference))
-	(LAP (CMPI L (& ,constant) ,reference)))))
+	(LAP (CMP L (& ,(* constant #x100)) ,reference))
+	(LAP (CMPI L (& ,(* constant #x100)) ,reference)))))
 
 (define-rule predicate
   (FIXNUM-PRED-2-ARGS (? predicate)
@@ -301,8 +301,7 @@ MIT in each case. |#
 (define (fixnum-predicate/memory*constant memory constant cc)
   (set-standard-branches! cc)
   (guarantee-signed-fixnum constant)
-  (LAP (CMPI L (& ,constant) ,memory)))
-
+  (LAP (CMPI L (& ,(* constant #x100)) ,memory)))
 (define-rule predicate
   (FIXNUM-PRED-2-ARGS (? predicate)
 		      (? memory)