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Don't read fplwp content in delay slot for considering the case fplwp was 

modifiled.

Reported by Chris Ross on port-sparc64.
This commit is contained in:
nakayama 2008-03-28 23:22:53 +00:00
parent e6806c2c83
commit 5a9b71307f
1 changed files with 4 additions and 3 deletions
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7
sys/arch/sparc64/sparc64/locore.s
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@ -1,4 +1,4 @@
/* $NetBSD: locore.s,v 1.274 2008/03/20 19:31:33 nakayama Exp $ */
/* $NetBSD: locore.s,v 1.275 2008/03/28 23:22:53 nakayama Exp $ */
/*
* Copyright (c) 1996-2002 Eduardo Horvath
@ -9528,14 +9528,15 @@ ENTRY(sparc64_ipi_save_fpstate)
LDPTR [%g1 + %lo(FPLWP)], %g3
cmp %g3, %g2
bne,pn CCCR, 7f ! skip if fplwp != %g2
LDPTR [%g3 + L_FPSTATE], %g3
mov CTX_SECONDARY, %g5
mov CTX_SECONDARY, %g5
ldxa [%g5] ASI_DMMU, %g6
membar #LoadStore
stxa %g0, [%g5] ASI_DMMU
membar #Sync
LDPTR [%g3 + L_FPSTATE], %g3
rdpr %pstate, %g2 ! enable FP before we begin
rd %fprs, %g5
wr %g0, FPRS_FEF, %fprs