From: Guillermo J. Rozas <edu/mit/csail/zurich/gjr>
Date: Tue, 18 Feb 1992 21:56:48 +0000 (+0000)
Subject: Fix bug in multiply-fixnum-constant.  There is no
X-Git-Tag: 20090517-FFI~9685
X-Git-Url: https://birchwood-abbey.net/git?a=commitdiff_plain;h=3b92118766d3c6578ab30423c06346ef2e9622eb;p=mit-scheme.git

Fix bug in multiply-fixnum-constant.  There is no
    (IMUL (R ?foo) (& ?bar))
instruction.  It is an assembler macro for
    (IMUL (R ?foo) (R ?foo) (& ?bar))
---

diff --git a/v7/src/compiler/machines/i386/rulfix.scm b/v7/src/compiler/machines/i386/rulfix.scm
index 32c5342d5..bb9cd17cd 100644
--- a/v7/src/compiler/machines/i386/rulfix.scm
+++ b/v7/src/compiler/machines/i386/rulfix.scm
@@ -1,6 +1,6 @@
 #| -*-Scheme-*-
 
-$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/compiler/machines/i386/rulfix.scm,v 1.20 1992/02/18 04:35:56 jinx Exp $
+$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/compiler/machines/i386/rulfix.scm,v 1.21 1992/02/18 21:56:48 jinx Exp $
 $MC68020-Header: /scheme/src/compiler/machines/bobcat/RCS/rules1.scm,v 4.36 1991/10/25 06:49:58 cph Exp $
 
 Copyright (c) 1992 Massachusetts Institute of Technology
@@ -287,7 +287,8 @@ MIT in each case. |#
 		    (NEG W ,target))
 	       (LAP (SAL W ,target (& ,expt-of-2))))))
 	(else
-	 (LAP (IMUL W ,target (& ,constant))))))
+	 ;; target must be a register!
+	 (LAP (IMUL W ,target ,target (& ,constant))))))
 
 ;;;; Operation tables