diff options
Diffstat (limited to 'distrib/sdl-1.2.15/src/video/ataricommon/SDL_ataric2p.S')
| -rw-r--r-- | distrib/sdl-1.2.15/src/video/ataricommon/SDL_ataric2p.S | 452 |
1 files changed, 452 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.15/src/video/ataricommon/SDL_ataric2p.S b/distrib/sdl-1.2.15/src/video/ataricommon/SDL_ataric2p.S new file mode 100644 index 0000000..3cd1961 --- /dev/null +++ b/distrib/sdl-1.2.15/src/video/ataricommon/SDL_ataric2p.S @@ -0,0 +1,452 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2012 Sam Lantinga + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + + Sam Lantinga + slouken@libsdl.org +*/ + +/* + Chunky to planar conversion routine + 1 byte/pixel -> 4 or 8 bit planes + + Patrice Mandin + Xavier Joubert + Mikael Kalms +*/ + + .globl _SDL_Atari_C2pConvert + .globl _SDL_Atari_C2pConvert8 + .globl _SDL_Atari_C2pConvert4 + .globl _SDL_Atari_C2pConvert4_pal + +/* ------------ Conversion C2P, 8 bits ------------ */ + + .text +_SDL_Atari_C2pConvert8: +#if !defined(__mcoldfire__) + movel sp@(4),c2p_source + movel sp@(8),c2p_dest + movel sp@(12),c2p_width + movel sp@(16),c2p_height + movel sp@(20),c2p_dblligne + movel sp@(24),c2p_srcpitch + movel sp@(28),c2p_dstpitch + + moveml d2-d7/a2-a6,sp@- + + movel c2p_source,c2p_cursrc + movel c2p_dest,c2p_curdst + movel #0x0f0f0f0f,d4 + movel #0x00ff00ff,d5 + movel #0x55555555,d6 + movew c2p_height+2,c2p_row + movew c2p_width+2,d0 + andw #-8,d0 + movew d0,c2p_rowlen + +SDL_Atari_C2p8_rowloop: + + movel c2p_cursrc,a0 + movel c2p_curdst,a1 + + movel a0,a2 + addw c2p_rowlen,a2 + + movel a0@+,d0 + movel a0@+,d1 + movel a0@+,d2 + movel a0@+,d3 +/* + d0 = a7a6a5a4a3a2a1a0 b7b6b5b4b3b2b1b0 c7c6c5c4c3c2c1c0 d7d6d5d4d3d2d1d0 + d1 = e7e6e5e4e3e2e1e0 f7f6f5f4f3f2f1f0 g7g6g5g4g3g2g1g0 h7h6h5h4h3h2h1h0 + d2 = i7i6i5i4i3i2i1i0 j7j6j5j4j3j2j1j0 k7k6k5k4k3k2k1k0 l7l6l5l4l3l2l1l0 + d3 = m7m6m5m4m3m2m1m0 n7n6n5n4n3n2n1n0 o7o6o5o4o3o2o1o0 p7p6p5p4p3p2p1p0 +*/ + movel d1,d7 + lsrl #4,d7 + eorl d0,d7 + andl d4,d7 + eorl d7,d0 + lsll #4,d7 + eorl d7,d1 + + movel d3,d7 + lsrl #4,d7 + eorl d2,d7 + andl d4,d7 + eorl d7,d2 + lsll #4,d7 + eorl d7,d3 + + movel d2,d7 + lsrl #8,d7 + eorl d0,d7 + andl d5,d7 + eorl d7,d0 + lsll #8,d7 + eorl d7,d2 + + movel d3,d7 + lsrl #8,d7 + eorl d1,d7 + andl d5,d7 + eorl d7,d1 + lsll #8,d7 + eorl d7,d3 +/* + d0 = a7a6a5a4e7e6e5e4 i7i6i5i4m7m6m5m4 c7c6c5c4g7g6g5g4 k7k6k5k4o7o6o5o4 + d1 = a3a2a1a0e3e2e1e0 i3i2i1i0m3m2m1m0 c3c2c1c0g3g2g1g0 k3k2k1k0o3o2o1o0 + d2 = b7b6b5b4f7f6f5f4 j7j6j5j4n7n6n5n4 d7d6d5d4h7h6h5h4 l7l6l5l4p7p6p5p4 + d3 = b3b2b1b0f3f2f1f0 j3j2j1j0n3n2n1n0 d3d2d1d0h3h2h1h0 l3l2l1l0p3p2p1p0 +*/ + bras SDL_Atari_C2p8_start + +SDL_Atari_C2p8_pix16: + + movel a0@+,d0 + movel a0@+,d1 + movel a0@+,d2 + movel a0@+,d3 +/* + d0 = a7a6a5a4a3a2a1a0 b7b6b5b4b3b2b1b0 c7c6c5c4c3c2c1c0 d7d6d5d4d3d2d1d0 + d1 = e7e6e5e4e3e2e1e0 f7f6f5f4f3f2f1f0 g7g6g5g4g3g2g1g0 h7h6h5h4h3h2h1h0 + d2 = i7i6i5i4i3i2i1i0 j7j6j5j4j3j2j1j0 k7k6k5k4k3k2k1k0 l7l6l5l4l3l2l1l0 + d3 = m7m6m5m4m3m2m1m0 n7n6n5n4n3n2n1n0 o7o6o5o4o3o2o1o0 p7p6p5p4p3p2p1p0 +*/ + movel d1,d7 + lsrl #4,d7 + movel a3,a1@+ + eorl d0,d7 + andl d4,d7 + eorl d7,d0 + lsll #4,d7 + eorl d7,d1 + + movel d3,d7 + lsrl #4,d7 + eorl d2,d7 + andl d4,d7 + eorl d7,d2 + movel a4,a1@+ + lsll #4,d7 + eorl d7,d3 + + movel d2,d7 + lsrl #8,d7 + eorl d0,d7 + andl d5,d7 + eorl d7,d0 + movel a5,a1@+ + lsll #8,d7 + eorl d7,d2 + + movel d3,d7 + lsrl #8,d7 + eorl d1,d7 + andl d5,d7 + eorl d7,d1 + movel a6,a1@+ + lsll #8,d7 + eorl d7,d3 +/* + d0 = a7a6a5a4e7e6e5e4 i7i6i5i4m7m6m5m4 c7c6c5c4g7g6g5g4 k7k6k5k4o7o6o5o4 + d1 = a3a2a1a0e3e2e1e0 i3i2i1i0m3m2m1m0 c3c2c1c0g3g2g1g0 k3k2k1k0o3o2o1o0 + d2 = b7b6b5b4f7f6f5f4 j7j6j5j4n7n6n5n4 d7d6d5d4h7h6h5h4 l7l6l5l4p7p6p5p4 + d3 = b3b2b1b0f3f2f1f0 j3j2j1j0n3n2n1n0 d3d2d1d0h3h2h1h0 l3l2l1l0p3p2p1p0 +*/ + +SDL_Atari_C2p8_start: + + movel d2,d7 + lsrl #1,d7 + eorl d0,d7 + andl d6,d7 + eorl d7,d0 + addl d7,d7 + eorl d7,d2 + + movel d3,d7 + lsrl #1,d7 + eorl d1,d7 + andl d6,d7 + eorl d7,d1 + addl d7,d7 + eorl d7,d3 +/* + d0 = a7b7a5b5e7f7e5f5 i7j7i5j5m7n7m5n5 c7d7c5d5g7h7g5h5 k7l7k5l5o7p7o5p5 + d1 = a3b3a1b1e3f3e1f1 i3j3i1j1m3n3m1n1 c3d3c1d1g3h3g1h1 k3l3k1l1o3p3o1p1 + d2 = a6b6a4b4e6f6e4f4 i6j6i4j4m6n6m4n4 c6d6c4d4g6h6g4h4 k6l6k4l4o6p6o4p4 + d3 = a2b2a0b0e2f2e0f0 i2j2i0j0m2n2m0n0 c2d2c0d0g2h2g0h0 k2l2k0l0o2p2o0p0 +*/ + movew d2,d7 + movew d0,d2 + swap d2 + movew d2,d0 + movew d7,d2 + + movew d3,d7 + movew d1,d3 + swap d3 + movew d3,d1 + movew d7,d3 +/* + d0 = a7b7a5b5e7f7e5f5 i7j7i5j5m7n7m5n5 a6b6a4b4e6f6e4f4 i6j6i4j4m6n6m4n4 + d1 = a3b3a1b1e3f3e1f1 i3j3i1j1m3n3m1n1 a2b2a0b0e2f2e0f0 i2j2i0j0m2n2m0n0 + d2 = c7d7c5d5g7h7g5h5 k7l7k5l5o7p7o5p5 c6d6c4d4g6h6g4h4 k6l6k4l4o6p6o4p4 + d3 = c3d3c1d1g3h3g1h1 k3l3k1l1o3p3o1p1 c2d2c0d0g2h2g0h0 k2l2k0l0o2p2o0p0 +*/ + movel d2,d7 + lsrl #2,d7 + eorl d0,d7 + andl #0x33333333,d7 + eorl d7,d0 + lsll #2,d7 + eorl d7,d2 + + movel d3,d7 + lsrl #2,d7 + eorl d1,d7 + andl #0x33333333,d7 + eorl d7,d1 + lsll #2,d7 + eorl d7,d3 +/* + d0 = a7b7c7d7e7f7g7h7 i7j7k7l7m7n7o7p7 a6b6c6d6e6f6g6h6 i6j6k6l6m6n6o6p6 + d1 = a3b3c3d3e3f3g3h3 i3j3k3l3m3n3o3p3 a2b2c2d2e2f2g2h2 i2j2k2l2m2n2o2p2 + d2 = a5b5c5d5e5f5g5h5 i5j5k5l5m5n5o5p5 a4b4c4d4e4f4g4h4 i4j4k4l4m4n4o4p4 + d3 = a1b1c1d1e1f1g1h1 i1j1k1l1m1n1o1p1 a0b0c0d0e0f0g0h0 i0j0k0l0m0n0o0p0 +*/ + swap d0 + swap d1 + swap d2 + swap d3 + + movel d0,a6 + movel d2,a5 + movel d1,a4 + movel d3,a3 + + cmpl a0,a2 + bgt SDL_Atari_C2p8_pix16 + + movel a3,a1@+ + movel a4,a1@+ + movel a5,a1@+ + movel a6,a1@+ + + /* Double the line ? */ + + movel c2p_srcpitch,d0 + movel c2p_dstpitch,d1 + + tstl c2p_dblligne + beqs SDL_Atari_C2p8_nodblline + + movel c2p_curdst,a0 + movel a0,a1 + addl d1,a1 + + movew c2p_width+2,d7 + lsrw #4,d7 + subql #1,d7 +SDL_Atari_C2p8_dblloop: + movel a0@+,a1@+ + movel a0@+,a1@+ + movel a0@+,a1@+ + movel a0@+,a1@+ + dbra d7,SDL_Atari_C2p8_dblloop + + addl d1,c2p_curdst + +SDL_Atari_C2p8_nodblline: + + /* Next line */ + + addl d0,c2p_cursrc + addl d1,c2p_curdst + + subqw #1,c2p_row + bne SDL_Atari_C2p8_rowloop + + moveml sp@+,d2-d7/a2-a6 +#endif + rts + +/* ------------ Conversion C2P, 4 bits ------------ */ + +_SDL_Atari_C2pConvert4: +#if !defined(__mcoldfire__) + movel sp@(4),c2p_source + movel sp@(8),c2p_dest + movel sp@(12),c2p_width + movel sp@(16),c2p_height + movel sp@(20),c2p_dblligne + movel sp@(24),c2p_srcpitch + movel sp@(28),c2p_dstpitch + + moveml d2-d7/a2-a6,sp@- + + movel c2p_source,a0 + movel c2p_dest,a1 + lea _SDL_Atari_table_c2p,a2 + movel #0x00070001,d3 +#if defined(__mc68020__) + moveq #0,d0 +#endif + + movel c2p_height,d7 + subql #1,d7 +c2p4_bcly: + movel a0,a4 | Save start address of source + movel a1,a5 | Save start address of dest + + | Conversion + + movel c2p_width,d6 + lsrw #4,d6 + subql #1,d6 +c2p4_bclx: + | Octets 0-7 + + moveq #0,d1 + moveq #7,d5 +c2p4_bcl07: +#if defined(__mc68020__) + moveb a0@+,d0 + lea a2@(0,d0:w:4),a3 +#else + moveq #0,d0 + moveb a0@+,d0 + lslw #2,d0 + lea a2@(0,d0:w),a3 +#endif + lsll #1,d1 + orl a3@,d1 + dbra d5,c2p4_bcl07 + + movepl d1,a1@(0) + addw d3,a1 + swap d3 + + | Octets 8-15 + + moveq #0,d1 + moveq #7,d5 +c2p4_bcl815: +#if defined(__mc68020__) + moveb a0@+,d0 + lea a2@(0,d0:w:4),a3 +#else + moveq #0,d0 + moveb a0@+,d0 + lslw #2,d0 + lea a2@(0,d0:w),a3 +#endif + lsll #1,d1 + orl a3@,d1 + dbra d5,c2p4_bcl815 + + movepl d1,a1@(0) + addw d3,a1 + swap d3 + + dbra d6,c2p4_bclx + + | Double line ? + + tstl c2p_dblligne + beqs c2p4_nodblligne + + movel a5,a6 | src line + movel a5,a1 | dest line + addl c2p_dstpitch,a1 + + movel c2p_width,d6 + lsrw #3,d6 + subql #1,d6 +c2p4_copydbl: + movel a6@+,a1@+ + dbra d6,c2p4_copydbl + + addl c2p_dstpitch,a5 +c2p4_nodblligne: + + | Next line + + movel a4,a0 + addl c2p_srcpitch,a0 + movel a5,a1 + addl c2p_dstpitch,a1 + + dbra d7,c2p4_bcly + + moveml sp@+,d2-d7/a2-a6 +#endif + rts + +/* ------------ Conversion of a light palette in 4 bits ------------ */ + +_SDL_Atari_C2pConvert4_pal: +#if !defined(__mcoldfire__) + /* a0 is a 256-word light palette */ + movel sp@(4),a0 + + moveml d2-d3,sp@- + + lea _SDL_Atari_table_c2p,a1 + movew #255,d3 +c2p_pal_initbcl: + movew a0@+,d0 + lsrw #4,d0 + andw #15,d0 + + moveq #3,d1 +c2p_pal_initbyte: + btst d1,d0 + sne d2 + negw d2 + moveb d2,a1@(0,d1:w) + + dbra d1,c2p_pal_initbyte + + addql #4,a1 + dbra d3,c2p_pal_initbcl + + moveml sp@+,d2-d3 +#endif + rts + +/* ------------ Buffers ------------ */ + + .bss + + .even + .comm _SDL_Atari_C2pConvert,4 + .comm _SDL_Atari_table_c2p,1024 + + .comm c2p_source,4 /* Source framebuffer */ + .comm c2p_dest,4 /* Destination framebuffer */ + .comm c2p_width,4 /* Width of zone to convert */ + .comm c2p_height,4 /* Height of zone to convert */ + .comm c2p_dblligne,4 /* Double the lines while converting ? */ + .comm c2p_srcpitch,4 /* Source pitch */ + .comm c2p_dstpitch,4 /* Destination pitch */ + .comm c2p_cursrc,4 /* Current source line */ + .comm c2p_curdst,4 /* Current destination line */ + .comm c2p_rowlen,2 /* Line length in bytes */ + .comm c2p_row,2 /* Current line number */ |