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171 lines
3.0 KiB
NASM
171 lines
3.0 KiB
NASM
*
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* $Id: sas_cxv45.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 __CXV45
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__CXV45
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MOVE.L D0,D1
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SWAP D1
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AND.W #$7FFF,D1
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CMP.W #$80,D1
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BLT lbC00003E
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CMP.W #$7F80,D1
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BGE lbC000060
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ASR.L #3,D0
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AND.L #$8FFFFFFF,D0
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ADD.L #$38000000,D0
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SWAP D1
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AND.L #7,D1
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ROR.L #3,D1
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lbC00003C
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RTS
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lbC00003E
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TST.L D1
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BEQ.S lbC00003C
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MOVEM.L D2-D5,-(SP)
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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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MOVE.W #$39D0,D5
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MOVEQ #0,D0
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SWAP D1
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JSR __CXNRM5(PC)
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MOVEM.L (SP)+,D2-D5
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RTS
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lbC000060
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ASR.L #3,D0
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OR.L #$7FF00000,D0
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SWAP D1
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AND.L #7,D1
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ROR.L #3,D1
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RTS
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__CXNRM5
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CMP.L #$20,D0
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BGE lbC0000B0
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SWAP D0
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SWAP D1
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MOVE.W D1,D0
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CLR.W D1
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SUB.W #$100,D5
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BGE.S __CXNRM5
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BRA lbC0000F4
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__CXTAB5
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dc.b 5
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dc.b 4
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dc.b 3
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dc.b 3
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dc.b 2
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dc.b 2
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dc.b 2
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dc.b 2
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dc.b 1
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dc.b 1
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dc.b 1
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dc.b 1
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dc.b 1
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dc.b 1
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dc.b 1
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dc.b 1
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dc.b 0
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dc.b 0
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dc.b 0
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dc.b 0
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dc.b 0
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dc.b 0
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dc.b 0
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dc.b 0
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dc.b 0
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dc.b 0
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dc.b 0
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dc.b 0
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dc.b 0
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dc.b 0
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dc.b 0
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dc.b 0
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lbC0000B0
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MOVEQ #0,D3
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CMP.L #$2000,D0
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BGE lbC0000C0
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LSL.L #8,D0
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ADDQ.W #8,D3
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lbC0000C0
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SWAP D0
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TST.W D0
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BNE lbC0000CC
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ROL.L #4,D0
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ADDQ.W #4,D3
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lbC0000CC
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MOVEQ #0,D2
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MOVE.B __CXTAB5(PC,D0.W),D2
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ROL.L D2,D0
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ADD.W D2,D3
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SWAP D0
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MOVE.L D1,D2
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LSL.L D3,D1
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ROL.L D3,D2
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EOR.W D1,D2
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EOR.W D2,D0
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LSL.W #4,D3
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SUB.W D3,D5
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BLT lbC0000F4
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SWAP D0
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ADD.W D5,D0
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OR.W D4,D0
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SWAP D0
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RTS
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lbC0000F4
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NEG.W D5
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LSR.W #4,D5
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MOVE.L D0,D2
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LSR.L D5,D0
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ROR.L D5,D2
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LSR.L D5,D1
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EOR.L D0,D2
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EOR.L D2,D1
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SWAP D0
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EOR.W D4,D0
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SWAP D0
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RTS
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end
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