77 lines
1.9 KiB
ArmAsm
77 lines
1.9 KiB
ArmAsm
/*
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* ARAnyM native features interface.
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* (c) 2005-2008 ARAnyM development team
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*
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* In 2006 updated with FreeMiNT headers and code.
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* In 2008 converted from "__NF" cookie to direct usage of NF instructions
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*
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**/
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/*
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* Copied from FreeMiNT source tree where Native Features were added recently
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*
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* Copyright 2003 Frank Naumann <fnaumann@freemint.de>
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* All rights reserved.
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This file is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* Author: Frank Naumann <fnaumann@freemint.de>
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* Started: 2003-12-13
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*
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* please send suggestions, patches or bug reports to me or
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* the MiNT mailing list
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*
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*/
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#define ARANYM 1
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# ifdef ARANYM
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.text
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.globl _detect_native_features
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/*
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* NatFeats test (routine retuns TRUE/FALSE (1/0) in D0)
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*/
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_detect_native_features:
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clr.l d0 // assume no NatFeats available
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move.l sp,a1 // save the ssp
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move.l (0x0010).w,a0 // illegal instruction vector
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move.l #fail_natfeat,(0x0010).w
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nop // flush pipelines (for 68040+)
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pea (nf_version_name).w(pc)
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subq.l #4,sp
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dc.w 0x7300 // Jump to NATFEAT_ID
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tst.l d0
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beq.s fail_natfeat
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moveq #1,d0 // NatFeats detected
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fail_natfeat:
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move.l a1,sp
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move.l a0,(0x0010).w
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nop // flush pipelines (for 68040+)
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rts
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nf_version_name:
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.ascii "NF_VERSION\0"
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# endif
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