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annotate src/video/ataricommon/SDL_ataric2p.S @ 1240:3b8a43c428bb

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From Bug #36: There are a couple of issues with the selection of Altivec alpha-blitting routines in CalculateAlphaBlit() in src/video/SDL_Blit_A.c. 1) There's no check for the presence of Altivec when checking if the Blit32to565PixelAlphaAltivec() routine can be selected. 2) Altivec cannot be used in video memory, and there's no check if the destination surface is a hardware surface. (Alpha-blitting to a hardware surface with GPU support is a bad idea, but somebody's bound to do it anyway.) Patch to fix these attached.
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 08 Jan 2006 21:18:15 +0000
parents 93207759e065
children c9b51268668f
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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f6ffac90895c Updated copyright information for 2002
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /*
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29 Chunky to planar conversion routine
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30 1 byte/pixel -> 4 or 8 bit planes
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31
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32 Patrice Mandin
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33 Xavier Joubert
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34 Mikael Kalms
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35 */
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36
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37 .globl _SDL_Atari_C2pConvert
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38 .globl _SDL_Atari_C2pConvert8
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39 .globl _SDL_Atari_C2pConvert4
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40 .globl _SDL_Atari_C2pConvert4_pal
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41
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42 /* ------------ Conversion C2P, 8 bits ------------ */
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43
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44 .text
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45 _SDL_Atari_C2pConvert8:
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46 movel sp@(4),c2p_source
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47 movel sp@(8),c2p_dest
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48 movel sp@(12),c2p_width
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49 movel sp@(16),c2p_height
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50 movel sp@(20),c2p_dblligne
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51 movel sp@(24),c2p_srcpitch
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52 movel sp@(28),c2p_dstpitch
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53
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54 moveml d2-d7/a2-a6,sp@-
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55
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56 movel c2p_source,c2p_cursrc
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57 movel c2p_dest,c2p_curdst
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58 movel #0x0f0f0f0f,d4
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59 movel #0x00ff00ff,d5
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60 movel #0x55555555,d6
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61 movew c2p_height+2,c2p_row
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62 movew c2p_width+2,d0
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63 andw #-8,d0
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64 movew d0,c2p_rowlen
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65
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66 SDL_Atari_C2p8_rowloop:
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67
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68 movel c2p_cursrc,a0
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69 movel c2p_curdst,a1
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70
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71 movel a0,a2
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72 addw c2p_rowlen,a2
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73
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74 movel a0@+,d0
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75 movel a0@+,d1
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76 movel a0@+,d2
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77 movel a0@+,d3
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78 /*
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79 d0 = a7a6a5a4a3a2a1a0 b7b6b5b4b3b2b1b0 c7c6c5c4c3c2c1c0 d7d6d5d4d3d2d1d0
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80 d1 = e7e6e5e4e3e2e1e0 f7f6f5f4f3f2f1f0 g7g6g5g4g3g2g1g0 h7h6h5h4h3h2h1h0
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81 d2 = i7i6i5i4i3i2i1i0 j7j6j5j4j3j2j1j0 k7k6k5k4k3k2k1k0 l7l6l5l4l3l2l1l0
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82 d3 = m7m6m5m4m3m2m1m0 n7n6n5n4n3n2n1n0 o7o6o5o4o3o2o1o0 p7p6p5p4p3p2p1p0
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83 */
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84 movel d1,d7
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85 lsrl #4,d7
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86 eorl d0,d7
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87 andl d4,d7
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88 eorl d7,d0
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89 lsll #4,d7
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90 eorl d7,d1
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91
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92 movel d3,d7
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93 lsrl #4,d7
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94 eorl d2,d7
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95 andl d4,d7
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96 eorl d7,d2
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97 lsll #4,d7
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98 eorl d7,d3
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99
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100 movel d2,d7
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101 lsrl #8,d7
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102 eorl d0,d7
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103 andl d5,d7
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104 eorl d7,d0
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105 lsll #8,d7
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106 eorl d7,d2
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107
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108 movel d3,d7
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109 lsrl #8,d7
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110 eorl d1,d7
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111 andl d5,d7
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112 eorl d7,d1
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113 lsll #8,d7
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114 eorl d7,d3
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115 /*
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116 d0 = a7a6a5a4e7e6e5e4 i7i6i5i4m7m6m5m4 c7c6c5c4g7g6g5g4 k7k6k5k4o7o6o5o4
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117 d1 = a3a2a1a0e3e2e1e0 i3i2i1i0m3m2m1m0 c3c2c1c0g3g2g1g0 k3k2k1k0o3o2o1o0
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118 d2 = b7b6b5b4f7f6f5f4 j7j6j5j4n7n6n5n4 d7d6d5d4h7h6h5h4 l7l6l5l4p7p6p5p4
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119 d3 = b3b2b1b0f3f2f1f0 j3j2j1j0n3n2n1n0 d3d2d1d0h3h2h1h0 l3l2l1l0p3p2p1p0
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120 */
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121 bras SDL_Atari_C2p8_start
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122
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123 SDL_Atari_C2p8_pix16:
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124
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125 movel a0@+,d0
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126 movel a0@+,d1
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127 movel a0@+,d2
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128 movel a0@+,d3
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129 /*
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130 d0 = a7a6a5a4a3a2a1a0 b7b6b5b4b3b2b1b0 c7c6c5c4c3c2c1c0 d7d6d5d4d3d2d1d0
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131 d1 = e7e6e5e4e3e2e1e0 f7f6f5f4f3f2f1f0 g7g6g5g4g3g2g1g0 h7h6h5h4h3h2h1h0
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132 d2 = i7i6i5i4i3i2i1i0 j7j6j5j4j3j2j1j0 k7k6k5k4k3k2k1k0 l7l6l5l4l3l2l1l0
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133 d3 = m7m6m5m4m3m2m1m0 n7n6n5n4n3n2n1n0 o7o6o5o4o3o2o1o0 p7p6p5p4p3p2p1p0
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134 */
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135 movel d1,d7
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136 lsrl #4,d7
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137 movel a3,a1@+
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138 eorl d0,d7
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139 andl d4,d7
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140 eorl d7,d0
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141 lsll #4,d7
0310bb01091f New C2P conversion routine
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parents: 297
diff changeset
142 eorl d7,d1
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
143
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
144 movel d3,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
145 lsrl #4,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
146 eorl d2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
147 andl d4,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
148 eorl d7,d2
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
149 movel a4,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
150 lsll #4,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
151 eorl d7,d3
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
152
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
153 movel d2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
154 lsrl #8,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
155 eorl d0,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
156 andl d5,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
157 eorl d7,d0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
158 movel a5,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
159 lsll #8,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
160 eorl d7,d2
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
161
734
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
162 movel d3,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
163 lsrl #8,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
164 eorl d1,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
165 andl d5,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
166 eorl d7,d1
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
167 movel a6,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
168 lsll #8,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
169 eorl d7,d3
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
170 /*
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
171 d0 = a7a6a5a4e7e6e5e4 i7i6i5i4m7m6m5m4 c7c6c5c4g7g6g5g4 k7k6k5k4o7o6o5o4
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
172 d1 = a3a2a1a0e3e2e1e0 i3i2i1i0m3m2m1m0 c3c2c1c0g3g2g1g0 k3k2k1k0o3o2o1o0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
173 d2 = b7b6b5b4f7f6f5f4 j7j6j5j4n7n6n5n4 d7d6d5d4h7h6h5h4 l7l6l5l4p7p6p5p4
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
174 d3 = b3b2b1b0f3f2f1f0 j3j2j1j0n3n2n1n0 d3d2d1d0h3h2h1h0 l3l2l1l0p3p2p1p0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
175 */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
176
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
177 SDL_Atari_C2p8_start:
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
178
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
179 movel d2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
180 lsrl #1,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
181 eorl d0,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
182 andl d6,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
183 eorl d7,d0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
184 addl d7,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
185 eorl d7,d2
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
186
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
187 movel d3,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
188 lsrl #1,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
189 eorl d1,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
190 andl d6,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
191 eorl d7,d1
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
192 addl d7,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
193 eorl d7,d3
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
194 /*
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
195 d0 = a7b7a5b5e7f7e5f5 i7j7i5j5m7n7m5n5 c7d7c5d5g7h7g5h5 k7l7k5l5o7p7o5p5
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
196 d1 = a3b3a1b1e3f3e1f1 i3j3i1j1m3n3m1n1 c3d3c1d1g3h3g1h1 k3l3k1l1o3p3o1p1
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
197 d2 = a6b6a4b4e6f6e4f4 i6j6i4j4m6n6m4n4 c6d6c4d4g6h6g4h4 k6l6k4l4o6p6o4p4
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
198 d3 = a2b2a0b0e2f2e0f0 i2j2i0j0m2n2m0n0 c2d2c0d0g2h2g0h0 k2l2k0l0o2p2o0p0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
199 */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
200 movew d2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
201 movew d0,d2
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
202 swap d2
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
203 movew d2,d0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
204 movew d7,d2
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
205
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
206 movew d3,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
207 movew d1,d3
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
208 swap d3
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
209 movew d3,d1
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
210 movew d7,d3
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
211 /*
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
212 d0 = a7b7a5b5e7f7e5f5 i7j7i5j5m7n7m5n5 a6b6a4b4e6f6e4f4 i6j6i4j4m6n6m4n4
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
213 d1 = a3b3a1b1e3f3e1f1 i3j3i1j1m3n3m1n1 a2b2a0b0e2f2e0f0 i2j2i0j0m2n2m0n0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
214 d2 = c7d7c5d5g7h7g5h5 k7l7k5l5o7p7o5p5 c6d6c4d4g6h6g4h4 k6l6k4l4o6p6o4p4
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
215 d3 = c3d3c1d1g3h3g1h1 k3l3k1l1o3p3o1p1 c2d2c0d0g2h2g0h0 k2l2k0l0o2p2o0p0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
216 */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
217 movel d2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
218 lsrl #2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
219 eorl d0,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
220 andl #0x33333333,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
221 eorl d7,d0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
222 lsll #2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
223 eorl d7,d2
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
224
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
225 movel d3,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
226 lsrl #2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
227 eorl d1,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
228 andl #0x33333333,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
229 eorl d7,d1
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
230 lsll #2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
231 eorl d7,d3
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
232 /*
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
233 d0 = a7b7c7d7e7f7g7h7 i7j7k7l7m7n7o7p7 a6b6c6d6e6f6g6h6 i6j6k6l6m6n6o6p6
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
234 d1 = a3b3c3d3e3f3g3h3 i3j3k3l3m3n3o3p3 a2b2c2d2e2f2g2h2 i2j2k2l2m2n2o2p2
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
235 d2 = a5b5c5d5e5f5g5h5 i5j5k5l5m5n5o5p5 a4b4c4d4e4f4g4h4 i4j4k4l4m4n4o4p4
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
236 d3 = a1b1c1d1e1f1g1h1 i1j1k1l1m1n1o1p1 a0b0c0d0e0f0g0h0 i0j0k0l0m0n0o0p0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
237 */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
238 swap d0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
239 swap d1
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
240 swap d2
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
241 swap d3
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
242
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
243 movel d0,a6
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
244 movel d2,a5
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
245 movel d1,a4
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
246 movel d3,a3
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
247
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
248 cmpl a0,a2
1086
93207759e065 Cleanup C2P routine
Patrice Mandin <patmandin@gmail.com>
parents: 734
diff changeset
249 bgt SDL_Atari_C2p8_pix16
734
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
250
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
251 movel a3,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
252 movel a4,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
253 movel a5,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
254 movel a6,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
255
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
256 /* Double the line ? */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
257
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
258 movel c2p_srcpitch,d0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
259 movel c2p_dstpitch,d1
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
260
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
261 tstl c2p_dblligne
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
262 beqs SDL_Atari_C2p8_nodblline
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
263
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
264 movel c2p_curdst,a0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
265 movel a0,a1
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
266 addl d1,a1
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
267
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
268 movew c2p_width+2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
269 lsrw #4,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
270 subql #1,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
271 SDL_Atari_C2p8_dblloop:
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
272 movel a0@+,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
273 movel a0@+,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
274 movel a0@+,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
275 movel a0@+,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
276 dbra d7,SDL_Atari_C2p8_dblloop
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
277
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
278 addl d1,c2p_curdst
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
279
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
280 SDL_Atari_C2p8_nodblline:
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
281
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
282 /* Next line */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
283
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
284 addl d0,c2p_cursrc
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
285 addl d1,c2p_curdst
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
286
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
287 subqw #1,c2p_row
1086
93207759e065 Cleanup C2P routine
Patrice Mandin <patmandin@gmail.com>
parents: 734
diff changeset
288 bne SDL_Atari_C2p8_rowloop
734
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
289
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
290 moveml sp@+,d2-d7/a2-a6
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
291 rts
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
292
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
293 /* ------------ Conversion C2P, 4 bits ------------ */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
294
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
295 _SDL_Atari_C2pConvert4:
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
296 movel sp@(4),c2p_source
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
297 movel sp@(8),c2p_dest
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
298 movel sp@(12),c2p_width
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
299 movel sp@(16),c2p_height
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
300 movel sp@(20),c2p_dblligne
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
301 movel sp@(24),c2p_srcpitch
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
302 movel sp@(28),c2p_dstpitch
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
303
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
304 moveml d2-d7/a2-a6,sp@-
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
305
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
306 movel c2p_source,a0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
307 movel c2p_dest,a1
734
0310bb01091f New C2P conversion routine
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parents: 297
diff changeset
308 lea _SDL_Atari_table_c2p,a2
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
309 movel #0x00070001,d3
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
310 #if defined(__M68020__)
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
311 moveq #0,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
312 #endif
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
313
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
314 movel c2p_height,d7
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
315 subql #1,d7
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
316 c2p4_bcly:
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
317 movel a0,a4 | Save start address of source
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
318 movel a1,a5 | Save start address of dest
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
319
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
320 | Conversion
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
321
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
322 movel c2p_width,d6
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
323 lsrw #4,d6
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
324 subql #1,d6
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
325 c2p4_bclx:
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
326 | Octets 0-7
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
327
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
328 moveq #0,d1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
329 moveq #7,d5
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
330 c2p4_bcl07:
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
331 #if defined(__M68020__)
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
332 moveb a0@+,d0
1086
93207759e065 Cleanup C2P routine
Patrice Mandin <patmandin@gmail.com>
parents: 734
diff changeset
333 lea a2@(0,d0:w:4),a3
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
334 #else
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
335 moveq #0,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
336 moveb a0@+,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
337 lslw #2,d0
1086
93207759e065 Cleanup C2P routine
Patrice Mandin <patmandin@gmail.com>
parents: 734
diff changeset
338 lea a2@(0,d0:w),a3
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
339 #endif
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
340 lsll #1,d1
1086
93207759e065 Cleanup C2P routine
Patrice Mandin <patmandin@gmail.com>
parents: 734
diff changeset
341 orl a3@,d1
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
342 dbra d5,c2p4_bcl07
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
343
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
344 movepl d1,a1@(0)
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
345 addw d3,a1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
346 swap d3
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
347
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
348 | Octets 8-15
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
349
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
350 moveq #0,d1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
351 moveq #7,d5
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
352 c2p4_bcl815:
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
353 #if defined(__M68020__)
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
354 moveb a0@+,d0
1086
93207759e065 Cleanup C2P routine
Patrice Mandin <patmandin@gmail.com>
parents: 734
diff changeset
355 lea a2@(0,d0:w:4),a3
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
356 #else
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
357 moveq #0,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
358 moveb a0@+,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
359 lslw #2,d0
1086
93207759e065 Cleanup C2P routine
Patrice Mandin <patmandin@gmail.com>
parents: 734
diff changeset
360 lea a2@(0,d0:w),a3
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
361 #endif
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
362 lsll #1,d1
1086
93207759e065 Cleanup C2P routine
Patrice Mandin <patmandin@gmail.com>
parents: 734
diff changeset
363 orl a3@,d1
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
364 dbra d5,c2p4_bcl815
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
365
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
366 movepl d1,a1@(0)
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
367 addw d3,a1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
368 swap d3
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
369
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
370 dbra d6,c2p4_bclx
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
371
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
372 | Double line ?
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
373
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
374 tstl c2p_dblligne
1086
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Patrice Mandin <patmandin@gmail.com>
parents: 734
diff changeset
375 beqs c2p4_nodblligne
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
376
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
377 movel a5,a6 | src line
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
378 movel a5,a1 | dest line
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
379 addl c2p_dstpitch,a1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
380
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
381 movel c2p_width,d6
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
382 lsrw #3,d6
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
383 subql #1,d6
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
384 c2p4_copydbl:
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
385 movel a6@+,a1@+
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
386 dbra d6,c2p4_copydbl
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
387
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
388 addl c2p_dstpitch,a5
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
389 c2p4_nodblligne:
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
390
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
391 | Next line
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
392
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
393 movel a4,a0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
394 addl c2p_srcpitch,a0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
395 movel a5,a1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
396 addl c2p_dstpitch,a1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
397
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
398 dbra d7,c2p4_bcly
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
399
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
400 moveml sp@+,d2-d7/a2-a6
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
401 rts
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
402
734
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
403 /* ------------ Conversion of a light palette in 4 bits ------------ */
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
404
734
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parents: 297
diff changeset
405 _SDL_Atari_C2pConvert4_pal:
281
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
406 /* a0 is a 256-word light palette */
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
407 movel sp@(4),a0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
408
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
409 moveml d2-d3,sp@-
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
410
1086
93207759e065 Cleanup C2P routine
Patrice Mandin <patmandin@gmail.com>
parents: 734
diff changeset
411 lea _SDL_Atari_table_c2p,a1
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
412 movew #255,d3
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
413 c2p_pal_initbcl:
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
414 movew a0@+,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
415 lsrw #4,d0
1086
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Patrice Mandin <patmandin@gmail.com>
parents: 734
diff changeset
416 andw #15,d0
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
417
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
418 moveq #3,d1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
419 c2p_pal_initbyte:
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
420 btst d1,d0
1086
93207759e065 Cleanup C2P routine
Patrice Mandin <patmandin@gmail.com>
parents: 734
diff changeset
421 sne d2
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
422 negw d2
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
423 moveb d2,a1@(0,d1:w)
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
424
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
425 dbra d1,c2p_pal_initbyte
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
426
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
427 addql #4,a1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
428 dbra d3,c2p_pal_initbcl
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
429
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
430 moveml sp@+,d2-d3
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
431
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
432 rts
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
433
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
434 /* ------------ Buffers ------------ */
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
435
1086
93207759e065 Cleanup C2P routine
Patrice Mandin <patmandin@gmail.com>
parents: 734
diff changeset
436 .bss
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
437
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
438 .even
734
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
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439 .comm _SDL_Atari_C2pConvert,4
1086
93207759e065 Cleanup C2P routine
Patrice Mandin <patmandin@gmail.com>
parents: 734
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440 .comm _SDL_Atari_table_c2p,1024
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
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441
734
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
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442 .comm c2p_source,4 /* Source framebuffer */
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Patrice Mandin <patmandin@gmail.com>
parents: 734
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443 .comm c2p_dest,4 /* Destination framebuffer */
93207759e065 Cleanup C2P routine
Patrice Mandin <patmandin@gmail.com>
parents: 734
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444 .comm c2p_width,4 /* Width of zone to convert */
734
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Patrice Mandin <patmandin@gmail.com>
parents: 297
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445 .comm c2p_height,4 /* Height of zone to convert */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
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446 .comm c2p_dblligne,4 /* Double the lines while converting ? */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
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447 .comm c2p_srcpitch,4 /* Source pitch */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
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448 .comm c2p_dstpitch,4 /* Destination pitch */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
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449 .comm c2p_cursrc,4 /* Current source line */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
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450 .comm c2p_curdst,4 /* Current destination line */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
451 .comm c2p_rowlen,2 /* Line length in bytes */
1086
93207759e065 Cleanup C2P routine
Patrice Mandin <patmandin@gmail.com>
parents: 734
diff changeset
452 .comm c2p_row,2 /* Current line number */