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142 lines
2.9 KiB
NASM
142 lines
2.9 KiB
NASM
*
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* $Id: sas_cxv54.asm,v 1.1.1.1 2004-07-26 16:31:04 obarthel Exp $
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*
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* :ts=8
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*
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* Adapted from reassembled SAS/C runtime library code.
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*
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* Portable ISO 'C' (1994) runtime library for the Amiga computer
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* Copyright (c) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Neither the name of Olaf Barthel nor the names of contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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section text,code
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xdef __CXV54
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xref __CXFERR
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__CXV54
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MOVEM.L A0/A1,-(SP)
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MOVE.L D4,A0
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SWAP D0
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MOVE.W D0,D4
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AND.W #$8000,D4
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EOR.W D4,D0
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SUB.W #$3800,D0
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CMP.W #$10,D0
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BLT lbC000098
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CMP.W #$FEF,D0
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BLT lbC000102
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CMP.W #$47F0,D0
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BLT lbC000058
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SWAP D0
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LSL.L #3,D0
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ROL.L #3,D1
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AND.L #7,D1
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EOR.L D1,D0
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SWAP D0
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OR.W #$7F80,D0
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BRA lbC000112
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lbC000058
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CMP.W #$FF0,D0
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BGE lbC000074
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CMP.L #$FFFF0FEF,D0
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BNE lbC000102
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CMP.L #$F0000000,D1
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BCS lbC000102
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lbC000074
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MOVEM.L D0/D1/A0/A1,-(SP)
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PEA 2.L
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JSR __CXFERR
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ADDQ.W #4,SP
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MOVEM.L (SP)+,D0/D1/A0/A1
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MOVE.L #$7F80,D0
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EOR.W D4,D0
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SWAP D0
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MOVEQ #0,D1
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BRA lbC000116
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lbC000098
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CMP.W #$FE90,D0
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BGE lbC0000C4
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ADD.W #$3800,D0
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OR.L D1,D0
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BEQ lbC000112
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MOVEM.L D0/D1/A0/A1,-(SP)
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PEA 1.L
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JSR __CXFERR
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ADDQ.W #4,SP
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MOVEM.L (SP)+,D0/D1/A0/A1
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MOVEQ #0,D0
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BRA lbC000112
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lbC0000C4
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MOVE.L D5,A1
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MOVE.W D0,D5
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AND.W #15,D0
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EOR.W #$10,D0
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SWAP D0
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ASR.W #4,D5
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ADDQ.W #2,D5
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BGE lbC0000E6
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NEG.W D5
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LSR.L D5,D0
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MOVEQ #0,D5
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ADDX.L D5,D0
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BRA lbC0000F6
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lbC0000E6
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CLR.W D1
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LSL.L D5,D0
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ADDQ.W #1,D5
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ROXL.L D5,D1
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AND.L #15,D1
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ADDX.L D1,D0
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lbC0000F6
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MOVE.L A1,D5
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SWAP D0
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EOR.W D4,D0
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SWAP D0
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BRA lbC000116
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lbC000102
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SWAP D0
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LSL.L #3,D0
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ROXL.L #4,D1
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AND.L #7,D1
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ADDX.L D1,D0
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SWAP D0
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lbC000112
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EOR.W D4,D0
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SWAP D0
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lbC000116
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MOVE.L A0,D4
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MOVEM.L (SP)+,A0/A1
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RTS
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end
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