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Message-ID: <19970602213805.05855@keltia.freenix.fr>
Date: Mon, 2 Jun 1997 21:38:05 +0200
From: Ollivier Robert <roberto@keltia.freenix.fr>
To: "FreeBSD Current Users' list" <freebsd-current@FreeBSD.ORG>
Cc: kato@FreeBSD.ORG
Subject: Patch to display MMX feature bit
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According to AMD's documentation, bit 23 of the CPUID value indicates that
the MMX feature is supported. Here is a -- yet untested -- patch to display
this bit.

My P133 used to give me a value of 0x1bf or <FPU,VME,DE,PSE,TSC,MSR,MCE,CX8>.
My K6 has a value of 0x8001bf but displays the same string. With the patch,
it will display <FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,MMX>.

Index: identcpu.c
===================================================================
RCS file: /spare/FreeBSD-current/src/sys/i386/i386/identcpu.c,v
retrieving revision 1.21
diff -u -2 -r1.21 identcpu.c
--- identcpu.c	1997/05/23 06:22:47	1.21
+++ identcpu.c	1997/06/02 19:37:17
@@ -381,4 +381,5 @@
 			"\017MCA"
 			"\020CMOV"
+			"\030MMX"
 			);
 		}

PS: why is the bitfield in kprintf one-based ?
-- 
Ollivier ROBERT -=- FreeBSD: There are no limits -=- roberto@keltia.freenix.fr
FreeBSD keltia.freenix.fr 3.0-CURRENT #10: Fri May 23 22:47:39 CEST 1997