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Only on the 68010, assemble versions of copypage

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and zeropage that use the 68010's loop mode.
This commit is contained in:
fredette 2001-05-18 15:31:38 +00:00
parent 90703ff4b3
commit 8160155f03
1 changed files with 15 additions and 1 deletions
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16
sys/arch/m68k/m68k/copypage.s
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@ -1,4 +1,4 @@
/* $NetBSD: copypage.s,v 1.7 1999/11/10 23:17:21 thorpej Exp $ */
/* $NetBSD: copypage.s,v 1.8 2001/05/18 15:31:38 fredette Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
@ -73,6 +73,7 @@ Lm16loop:
ENTRY(copypage)
movl %sp@(4),%a0 | source address
movl %sp@(8),%a1 | destiniation address
#ifndef __mc68010__
movw #NBPG/32-1,%d0 | number of 32 byte chunks - 1
Lmlloop:
movl %a0@+,%a1@+
@ -84,6 +85,12 @@ Lmlloop:
movl %a0@+,%a1@+
movl %a0@+,%a1@+
dbf %d0,Lmlloop
#else /* __mc68010__ */
movw #NBPG/4-1,%d0 | number of 4 byte chunks - 1
Lmlloop:
movl %a0@+,%a1@+
dbf %d0,Lmlloop | use the 68010 loop mode
#endif /* __mc68010__ */
rts
/*
@ -93,6 +100,7 @@ Lmlloop:
*/
ENTRY(zeropage)
movl %sp@(4),%a0 | dest address
#ifndef __mc68010__
movql #NBPG/256-1,%d0 | number of 256 byte chunks - 1
movml %d2-%d7,%sp@-
movql #0,%d1
@ -115,4 +123,10 @@ Lzloop:
movml %d1-%d7/%a1,%a0@-
dbf %d0,Lzloop
movml %sp@+,%d2-%d7
#else /* __mc68010__ */
movw #NBPG/4-1,%d0 | number of 4 byte chunks - 1
Lzloop:
clrl %a0@+
dbf %d0,Lzloop | use the 68010 loop mode
#endif /* __mc68010__ */
rts