From 0bdfa3699dede75e657a24bd22e0e4aa7eafd5e4 Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@felloff.net>
Date: Thu, 16 Jul 2015 08:51:06 +0200
Subject: pc: check Sse (bit 25) in cpuiddx before enabling fxsr in cr4 (fixes
 crash on the pentium II)

---
 sys/src/9/pc/devarch.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/src/9/pc/devarch.c b/sys/src/9/pc/devarch.c
index 429d86c84..d3ead0cac 100644
--- a/sys/src/9/pc/devarch.c
+++ b/sys/src/9/pc/devarch.c
@@ -864,7 +864,7 @@ cpuidentify(void)
 	if(m->cpuiddx & Mtrr)
 		mtrrsync();
 
-	if(m->cpuiddx & Fxsr){			/* have sse fp? */
+	if((m->cpuiddx & (Sse|Fxsr)) == (Sse|Fxsr)){			/* have sse fp? */
 		fpsave = fpssesave;
 		fprestore = fpsserestore;
 		putcr4(getcr4() | CR4Osfxsr|CR4Oxmmex);
-- 
cgit v1.2.3