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Restore FPU context properly on 68060-specific kernels...

This commit is contained in:
scw 2001-07-18 17:13:15 +00:00
parent cb6f78fe5d
commit db111a0133
1 changed files with 10 additions and 13 deletions
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23
sys/arch/mvme68k/mvme68k/locore.s
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@ -1,4 +1,4 @@
/* $NetBSD: locore.s,v 1.85 2001/07/06 19:00:14 scw Exp $ */
/* $NetBSD: locore.s,v 1.86 2001/07/18 17:13:15 scw Exp $ */
/*
* Copyright (c) 1988 University of Utah.
@ -1430,9 +1430,8 @@ Lswnofpsave:
moveml %a1@(PCB_REGS),#0xFCFC | and registers
movl %a1@(PCB_USP),%a0
movl %a0,%usp | and USP
tstl _C_LABEL(fputype) | If we don't have an FPU,
jeq Lnofprest | don't try to restore it.
tstl _C_LABEL(fputype) | Do we have an FPU?
jeq Lnofprest | No Then don't attempt restore.
lea %a1@(PCB_FPCTX),%a0 | pointer to FP save area
#if defined(M68020) || defined(M68030) || defined(M68040)
#if defined(M68060)
@ -1443,28 +1442,26 @@ Lswnofpsave:
jeq Lresfprest | yes, easy
fmovem %a0@(FPF_FPCR),%fpcr/%fpsr/%fpi | restore FP control registers
fmovem %a0@(FPF_REGS),%fp0-%fp7 | restore FP general registers
Lresfprest:
#if defined(M68060)
jra Lresfprest
#endif
#endif
frestore %a0@ | restore state
Lnofprest:
movw %a1@(PCB_PS),%sr | restore PS
moveq #1,%d0 | return 1 (for alternate returns)
rts
#if defined(M68060)
Lresfp60rest1:
tstb %a0@(2) | null state frame?
jeq Lresfp60rest2 | yes, easy
jeq Lresfprest | yes, easy
fmovem %a0@(FPF_FPCR),%fpcr | restore FP control registers
fmovem %a0@(FPF_FPSR),%fpsr
fmovem %a0@(FPF_FPI),%fpi
fmovem %a0@(FPF_REGS),%fp0-%fp7 | restore FP general registers
Lresfp60rest2:
#endif
Lresfprest:
frestore %a0@ | restore state
Lnofprest:
movw %a1@(PCB_PS),%sr | no, restore PS
moveq #1,%d0 | return 1 (for alternate returns)
rts
#endif
/*
* savectx(pcb)