From: Chris Hanson <org/chris-hanson/cph>
Date: Mon, 11 Dec 1989 07:15:11 +0000 (+0000)
Subject: * Take advantage of new entry points in compiled code interface.
X-Git-Tag: 20090517-FFI~11614
X-Git-Url: https://birchwood-abbey.net/git?a=commitdiff_plain;h=a6713374ae8140574725ea92664b5694e7741ceb;p=mit-scheme.git

* Take advantage of new entry points in compiled code interface.
These changes require microcode 11.16 or later.

* Use BFEXTU instruction to extract type field.  This instruction is
both faster and smaller than the previous sequence, for both 6 and 8
bit types.  Use BFTST instruction to test for zero types.
Conditionalize use of the bit-field instructions on the new flag
`use-68020-instructions?'; I don't believe that we're using any other
68020-specific instructions besides these.

* Add rule for 1-arg fixnum predicates that tries to take advantage of
the preceding LSL.L instruction to test the number, rather than
emitting a redundant TST.L; this new rule is always used in generic
arithmetic expansions.
---

diff --git a/v7/src/compiler/machines/bobcat/make.scm-68040 b/v7/src/compiler/machines/bobcat/make.scm-68040
index c140ed3bf..08071e6a8 100644
--- a/v7/src/compiler/machines/bobcat/make.scm-68040
+++ b/v7/src/compiler/machines/bobcat/make.scm-68040
@@ -1,6 +1,6 @@
 #| -*-Scheme-*-
 
-$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/compiler/machines/bobcat/make.scm-68040,v 4.62 1989/12/05 20:54:08 jinx Exp $
+$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/compiler/machines/bobcat/make.scm-68040,v 4.63 1989/12/11 07:15:11 cph Exp $
 
 Copyright (c) 1988, 1989 Massachusetts Institute of Technology
 
@@ -41,4 +41,4 @@ MIT in each case. |#
 	    ((package/reference (find-package name) 'INITIALIZE-PACKAGE!)))
 	  '((COMPILER MACROS)
 	    (COMPILER DECLARATIONS)))
-(add-system! (make-system "Liar (Motorola MC68020)" 4 62 '()))
\ No newline at end of file
+(add-system! (make-system "Liar (Motorola MC68020)" 4 63 '()))
\ No newline at end of file