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R-type
33 lines
1.6 KiB
ArmAsm
33 lines
1.6 KiB
ArmAsm
| c2pmac.S - Atari Falcon chunky to planar conversion helper macro
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| Copyright (c) 1996 Douglas Little
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| Copyright (c) 1997-1998 Petr Stehlik and Karel Rous
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| Copyright (c) 1998-2008 Atari800 development team (see DOC/CREDITS)
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| This file is part of the Atari800 emulator project which emulates
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| the Atari 400, 800, 800XL, 130XE, and 5200 8-bit computers.
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| Atari800 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 of the License, or
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| (at your option) any later version.
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| Atari800 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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| You should have received a copy of the GNU General Public License
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| along with Atari800; if not, write to the Free Software
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| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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.macro splice p0 p1 p2 p3 p4 | data1,data2,mask,temp
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move.l \p2,\p4 | 2(2:0) (1:1) EEFFGGHH
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lsr.l #\p0,\p4 | 4(4:0) (1:2) plice3_.EEFFGG
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eor.l \p1,\p4 | 2(2:0) (1:1) plice3_.EEFFGG^AABBCCDD
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and.l \p3,\p4 | 2(2:0) (1:1) plice3_.EE..GG^plice3_.BB..DD
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eor.l \p4,\p1 | 2(2:0) (1:1) AAEECCGG (AABBCCDD^plice3_.EE..GG^plice3_.BB..DD)
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lsl.l #\p0,\p4 | 4(4:0) (1:2) EE..GG..^BB..DD..
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eor.l \p4,\p2 | 2(2:0) (1:1) BBFFDDHH (EEFFGGHH^EE..GG..^BB..DD..)
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.endm | 7 ops / 14 bytes / 68030=18(18:0) / 68040=(7:9)
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