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Avoid using btrl, and check astpending before the return cs, because it's

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faster and usually false.
This commit is contained in:
mycroft 1995-01-15 00:36:37 +00:00
parent 720e729421
commit a2dafd0821
1 changed files with 5 additions and 4 deletions
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9
sys/arch/i386/isa/icu.s
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@ -1,4 +1,4 @@
/* $NetBSD: icu.s,v 1.36 1994/10/27 04:17:17 cgd Exp $ */
/* $NetBSD: icu.s,v 1.37 1995/01/15 00:36:37 mycroft Exp $ */
/*-
* Copyright (c) 1993, 1994 Charles Hannum.
@ -129,12 +129,13 @@ IDTVEC(doreti)
jmp *_Xresume(,%eax,4)
2: /* Check for ASTs on exit to user mode. */
cli
cmpb $0,_astpending
je 3f
testb $SEL_RPL_MASK,TF_CS(%esp)
jz 3f
btrl $0,_astpending
jnc 3f
movb $0,_astpending
sti
/* Pushed T_ASTFLT into TF_TRAPNO on interrupt entry. */
/* Pushed T_ASTFLT into tf_trapno on entry. */
call _trap
3: INTRFASTEXIT