From: Kevin O'Connor <kevin@koconnor.net>
Date: Mon, 19 Jan 2009 22:58:54 +0000 (-0500)
Subject: Allow GET/SET_SEG asm to access memory or a register.
X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=commitdiff_plain;h=79f4118e50ce256994b75b99811ceb0e6a812a13;p=seabios.git

Allow GET/SET_SEG asm to access memory or a register.

This is a minor optimization that can improve gcc code generation.
---

diff --git a/src/farptr.h b/src/farptr.h
index 3256848..a26cf08 100644
--- a/src/farptr.h
+++ b/src/farptr.h
@@ -49,10 +49,10 @@ extern u16 __segment_FS, __segment_GS;
 // Low level macros for getting/setting a segment register.
 #define __SET_SEG(SEG, value)                                   \
     __asm__("movw %w1, %%" #SEG : "=m"(__segment_ ## SEG)       \
-            : "r"(value))
+            : "rm"(value))
 #define __GET_SEG(SEG) ({                                       \
     u16 __seg;                                                  \
-    __asm__("movw %%" #SEG ", %w0" : "=r"(__seg)                \
+    __asm__("movw %%" #SEG ", %w0" : "=rm"(__seg)               \
             : "m"(__segment_ ## SEG));                          \
     __seg;})