Fix register*constant methods for plus-fixnum and minus-fixnum.

When adding 0 with overflow tests, they were not loading the target.

diff --git a/v7/src/compiler/machines/spectrum/rulfix.scm b/v7/src/compiler/machines/spectrum/rulfix.scm
index 5efc3fd2038563e6f9f3d49070e167cd08fded4a..5f6eeb9bbf52c3b7ce179899760206b8f24d305a 100644 (file)
--- a/v7/src/compiler/machines/spectrum/rulfix.scm
+++ b/v7/src/compiler/machines/spectrum/rulfix.scm
@@ -1,6 +1,6 @@
 #| -*-Scheme-*-
 
-$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/compiler/machines/spectrum/rulfix.scm,v 4.32 1990/01/25 16:44:44 jinx Exp $
+$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/compiler/machines/spectrum/rulfix.scm,v 4.33 1990/03/24 13:22:42 jinx Exp $
 $MC68020-Header: rules1.scm,v 4.32 90/01/18 22:43:54 GMT cph Exp $
 
 Copyright (c) 1989, 1990 Massachusetts Institute of Technology
@@ -231,7 +231,7 @@ MIT in each case. |#
     (let ((value (* constant fixnum-1)))
       (if overflow?
          (cond ((zero? constant)
-                (LAP (SKIP (TR))))
+                (LAP (ADD (TR) ,src 0 ,tgt)))
                ((fits-in-11-bits-signed? value)
                 (LAP (ADDI (NSV) ,value ,src ,tgt)))
                (else
@@ -246,7 +246,7 @@ MIT in each case. |#
     (let ((value (- (* constant fixnum-1))))
       (if overflow?
          (cond ((zero? constant)
-                (LAP (SKIP (TR))))
+                (LAP (SUB (TR) ,src 0 ,tgt)))
                ((fits-in-11-bits-signed? value)
                 (LAP (ADDI (NSV) ,value ,src ,tgt)))
                (else