From: Stas Boukarev <stassats@gmail.com>
Date: Sat, 7 Sep 2013 05:48:35 +0000 (+0400)
Subject: Adjust SETcc instruction encoding on x86-64.
X-Git-Url: http://repo.macrolet.net/gitweb/?a=commitdiff_plain;h=9c510b74eca61bbcc2014dc2b1d02049dff50508;p=sbcl.git

Adjust SETcc instruction encoding on x86-64.

Avoid emitting REX for legacy registers.
---

diff --git a/src/compiler/x86-64/insts.lisp b/src/compiler/x86-64/insts.lisp
index 442c485..554cb52 100644
--- a/src/compiler/x86-64/insts.lisp
+++ b/src/compiler/x86-64/insts.lisp
@@ -2752,7 +2752,7 @@
 (define-instruction set (segment dst cond)
   (:printer cond-set ())
   (:emitter
-   (maybe-emit-rex-for-ea segment dst nil)
+   (maybe-emit-rex-for-ea segment dst nil :operand-size :byte)
    (emit-byte segment #b00001111)
    (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b10010000))
    (emit-ea segment dst #b000)))