[src/trunk]: src/sys/arch/sh5/sh5 Slight tweak to save one instruction in the...

[scw <scw%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/0747df99cd8b
branches:  trunk
changeset: 536212:0747df99cd8b
user:      scw <scw%NetBSD.org@localhost>
date:      Wed Sep 11 10:55:05 2002 +0000

description:
Slight tweak to save one instruction in the pteg TLB miss case.

diffstat:

 sys/arch/sh5/sh5/exception.S |  7 ++-----
 1 files changed, 2 insertions(+), 5 deletions(-)

diffs (33 lines):

diff -r 43274bed93f8 -r 0747df99cd8b sys/arch/sh5/sh5/exception.S
--- a/sys/arch/sh5/sh5/exception.S      Wed Sep 11 08:30:48 2002 +0000
+++ b/sys/arch/sh5/sh5/exception.S      Wed Sep 11 10:55:05 2002 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: exception.S,v 1.13 2002/09/10 12:27:21 scw Exp $       */
+/*     $NetBSD: exception.S,v 1.14 2002/09/11 10:55:05 scw Exp $       */
 
 /*
  * Copyright 2002 Wasabi Systems, Inc.
@@ -971,8 +971,6 @@
        LDPTR   r0, 0, r0
        add     r2, r0, r2              /* r2 points to required PTE group */
        getcon  tea, r4                 /* Get missed virtual address */
-       movi    NBPG-1,r1
-       andc    r4, r1, r4              /* Mask off PGOFSET bits */
 
        /*
         * r0/r1 available
@@ -983,13 +981,12 @@
         *
         * XXX: Register allocation could be optimised a wee bit here...
         */
-Ltlbmiss_lookup:
        pta/l   1f, tr0
        pta/l   2f, tr1
 
        movi    SH5_PTE_PN_MASK_MOVI, r1/* Mask for EPN */
        movi    SH5_PTEG_SIZE, r6       /* How many PTEs per group */
-
+       and     r4, r1, r4
 1:     LDPTE   r2, SH5_PTE_VSID, r0    /* Fetch VSID */
        bne/l   r5, r0, tr1             /* Jump if PTE's VSID doesn't match */
        LDPTE   r2, SH5_PTE_PTEH, r0    /* Fetch PTEH */