From: Taylor R Campbell <campbell@mumble.net>
Date: Sun, 16 Mar 2014 14:49:26 +0000 (+0000)
Subject: Assemble (JMP (@PCR FOO)) (LABEL FOO) to zero bits on amd64.
X-Git-Tag: release-9.2.0~28
X-Git-Url: https://birchwood-abbey.net/git?a=commitdiff_plain;h=f4dda7bf4a6f9f529fd2b295a0f51ee9ed6dc22b;p=mit-scheme.git

Assemble (JMP (@PCR FOO)) (LABEL FOO) to zero bits on amd64.
---

diff --git a/src/compiler/machines/x86-64/instr1.scm b/src/compiler/machines/x86-64/instr1.scm
index 72c069507..4fd2969f7 100644
--- a/src/compiler/machines/x86-64/instr1.scm
+++ b/src/compiler/machines/x86-64/instr1.scm
@@ -566,6 +566,8 @@ USA.
 (define-instruction JMP
   (((@PCR (? dest)))
    (VARIABLE-WIDTH (disp `(- ,dest (+ *PC* 2)))
+     ((0 0)
+      (BITS))
      ((#x-80 #x7f)
       (BITS (8 #xeb)
 	    (8 disp SIGNED)))
@@ -575,6 +577,8 @@ USA.
 
   (((@PCRO (? dest) (? offset)))
    (VARIABLE-WIDTH (disp `(- (+ ,dest ,offset) (+ *PC* 2)))
+     ((0 0)
+      (BITS))
      ((#x-80 #x7f)
       (BITS (8 #xeb)
 	    (8 disp SIGNED)))