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Trivial asm-level optimizations.

This commit is contained in:
itohy 1999-02-02 09:16:52 +00:00
parent bb1f1b53ac
commit fbfe12046d
1 changed files with 8 additions and 9 deletions
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17
sys/arch/x68k/x68k/locore.s
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@ -1,4 +1,4 @@
/* $NetBSD: locore.s,v 1.37 1998/11/11 06:43:52 thorpej Exp $ */
/* $NetBSD: locore.s,v 1.38 1999/02/02 09:16:52 itohy Exp $ */
/*
* Copyright (c) 1988 University of Utah.
@ -1264,7 +1264,7 @@ ENTRY(switch_exit)
/* Schedule the vmspace and stack to be freed. */
movl a0,sp@- | exit2(p)
jbsr _C_LABEL(exit2)
lea sp@(4),sp | pop args
addql #4,sp | pop args
jra _C_LABEL(cpu_switch)
@ -1894,12 +1894,11 @@ Lm68060fprdone:
_doboot:
movw #PSL_HIGHIPL,sr | cut off any interrupts
subal a1,a1 | a1 = 0
moveq #0,d1 | d1 = 0
movl _mmutype,d2 | d2 = 0
movl #CACHE_OFF,d0
#if defined(M68040) || defined(M68060)
cmpl #MMU_68040,d2 | 68040?
movl _mmutype,d2 | d2 = mmutype
addl #-MMU_68040,d2 | 68040?
jne Ldoboot0 | no, skip
.word 0xf4f8 | cpusha bc - push and invalidate caches
nop
@ -1911,14 +1910,14 @@ Ldoboot0:
| ok, turn off MMU..
Ldoreboot:
#if defined(M68040) || defined(M68060)
cmpl #MMU_68040,d2 | 68040?
tstl d2 | 68040?
jne LmotommuF | no, skip
movc d1,cacr | caches off
.long 0x4e7b1003 | movc d1(=0),tc ; disable MMU
movc a1,cacr | caches off
.long 0x4e7b9003 | movc a1(=0),tc ; disable MMU
jra Ldoreboot1
LmotommuF:
#endif
movl d1,sp@
clrl sp@
pmove sp@,tc | disable MMU
Ldoreboot1:
moveml 0x00ff0000,#0x0101 | get RESET vectors in ROM