From: Keir Fraser <keir@xensource.com>
Date: Thu, 11 Oct 2007 18:18:12 +0000 (+0100)
Subject: x86: Fix emulation of DIV instruction. Never actually used currently,
X-Git-Tag: 3.1.2-rc1~15
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=1dcf44dd9377b2057403fbb418c34311fb00a0e5;p=people%2Fvhanquez%2Fxen.git

x86: Fix emulation of DIV instruction. Never actually used currently,
but this will avoid a #DE in Xen.
Signed-off-by: Keir Fraser <keir@xensource.com>
xen-unstable changeset:   16097:d5531095d06b5e4513e891b89fd3085311490304
xen-unstable date:        Thu Oct 11 19:18:12 2007 +0100
---

diff --git a/xen/arch/x86/x86_emulate.c b/xen/arch/x86/x86_emulate.c
index 213da19f5..d6f1dbf8a 100644
--- a/xen/arch/x86/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate.c
@@ -586,7 +586,7 @@ static int imul_dbl(unsigned long m[2])
  */
 static int div_dbl(unsigned long u[2], unsigned long v)
 {
-    if ( (v == 0) || (u[1] > v) || ((u[1] == v) && (u[0] != 0)) )
+    if ( (v == 0) || (u[1] >= v) )
         return 1;
     asm ( "div %4"
           : "=a" (u[0]), "=d" (u[1])