From 5ef9c8cf9627980c5912a5b0521d9888dd8d30b2 Mon Sep 17 00:00:00 2001
From: ludwig <ludwig@edf5b092-35ff-0310-97b2-ce42778d08ea>
Date: Sat, 2 May 2009 17:15:51 +0000
Subject: align stack before re-entering engine to make sse work (#4051)

git-svn-id: svn://svn.icculus.org/quake3/trunk@1533 edf5b092-35ff-0310-97b2-ce42778d08ea
---
 code/qcommon/vm_x86.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/code/qcommon/vm_x86.c b/code/qcommon/vm_x86.c
index 8d1521b..7dee658 100644
--- a/code/qcommon/vm_x86.c
+++ b/code/qcommon/vm_x86.c
@@ -214,6 +214,9 @@ __asm__(
 	"ret\n"
 	"0:\n\t" // system call
 	"notl  %eax\n\t"
+	"pushl %ebp\n\t"
+	"movl  %esp, %ebp\n\t"
+	"andl $-16, %esp\n\t" // align the stack so engine can use sse
 	"pushl %ecx\n\t"
 	"pushl %edi\n\t" // opStack
 	"pushl %esi\n\t" // programStack
@@ -221,6 +224,8 @@ __asm__(
 	"call  " CMANG(CallAsmCall) "\n\t"
 	"addl  $12, %esp\n\t"
 	"popl  %ecx\n\t"
+	"movl  %ebp, %esp\n\t"
+	"popl  %ebp\n\t"
 	"addl  $4, %edi\n\t"
 	"ret\n\t"
 #if defined __ELF__
-- 
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