summaryrefslogtreecommitdiff
path: root/apps/plugins/mpegplayer/libmpeg2/idct_coldfire.S
diff options
context:
space:
mode:
Diffstat (limited to 'apps/plugins/mpegplayer/libmpeg2/idct_coldfire.S')
-rw-r--r--apps/plugins/mpegplayer/libmpeg2/idct_coldfire.S575
1 files changed, 575 insertions, 0 deletions
diff --git a/apps/plugins/mpegplayer/libmpeg2/idct_coldfire.S b/apps/plugins/mpegplayer/libmpeg2/idct_coldfire.S
new file mode 100644
index 0000000000..abc54b16cb
--- /dev/null
+++ b/apps/plugins/mpegplayer/libmpeg2/idct_coldfire.S
@@ -0,0 +1,575 @@
+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ * $Id$
+ *
+ * Copyright (C) 2007 Jens Arnold
+ * Based on the work of Karim Boucher and Rani Hod
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+ .global mpeg2_idct_copy
+ .type mpeg2_idct_copy, @function
+ .global mpeg2_idct_add
+ .type mpeg2_idct_add, @function
+
+ /* The IDCT itself.
+ * Input: %a0: block pointer
+ * Caller must save all registers. */
+ .align 2
+.idct:
+ move.l %a0, %a6
+
+ move.l #0, %macsr | signed integer mode
+
+ move.l #((2048<<16)+2841), %a0 | W0, W1
+ move.l #((2676<<16)+2408), %a1 | W2, W3
+ move.l #((2048<<16)+1609), %a2 | W4, W5
+ move.l #((1108<<16)+ 565), %a3 | W6, W7
+
+ lea.l (128,%a6), %a4 | secondary, transposed temp buffer
+ moveq.l #8, %d3 | loop counter
+
+.row_loop:
+ movem.l (%a6), %d0-%d2/%a5 | fetch (f0, f2, f4, f6, f1, f3, f5, f7)
+
+ mac.w %a0l, %d2u, %acc0 | %acc0 = W1 * f1
+ mac.w %a1l, %d2l, %acc0 | + W3 * f3
+ mac.w %a2l, %a5u, %acc0 | + W5 * f5
+ mac.w %a3l, %a5l, %acc0 | + W7 * f7
+
+ mac.w %a1l, %d2u, %acc1 | %acc1 = W3 * f1
+ msac.w %a3l, %d2l, %acc1 | - W7 * f3
+ msac.w %a0l, %a5u, %acc1 | - W1 * f5
+ msac.w %a2l, %a5l, %acc1 | - W5 * f7
+
+ mac.w %a2l, %d2u, %acc2 | %acc2 = W5 * f1
+ msac.w %a0l, %d2l, %acc2 | - W1 * f3
+ mac.w %a3l, %a5u, %acc2 | + W7 * f5
+ mac.w %a1l, %a5l, %acc2 | + W3 * f7
+
+ mac.w %a3l, %d2u, %acc3 | %acc3 = W7 * f1
+ msac.w %a2l, %d2l, %acc3 | - W5 * f3
+ mac.w %a1l, %a5u, %acc3 | + W3 * f5
+ msac.w %a0l, %a5l, %acc3 | - W1 * f7
+
+ lea.l (16,%a6), %a6 | Advance to next row; put here to fill EMAC latency
+ add.l #(1<<16), %d0 | f0 += 1;
+
+ movclr.l %acc0, %d4 | b0
+ movclr.l %acc1, %d5 | b1
+ movclr.l %acc2, %d6 | b2
+ movclr.l %acc3, %d7 | b3
+
+ mac.w %a0u, %d0u, %acc0 | %acc0 = W0 * f0
+ mac.w %a2u, %d1u, %acc0 | + W4 * f4
+ move.l %acc0, %acc3
+ mac.w %a1u, %d0l, %acc0 | + W2 * f2
+ mac.w %a3u, %d1l, %acc0 | + W6 * f6
+
+ mac.w %a0u, %d0u, %acc1 | %acc1 = W0 * f0
+ msac.w %a2u, %d1u, %acc1 | - W4 * f4
+ move.l %acc1, %acc2
+ mac.w %a3u, %d0l, %acc1 | + W6 * f2
+ msac.w %a1u, %d1l, %acc1 | - W2 * f6
+
+ | ^ move.l %acc1, %acc2 %acc2 = W0 * f0 - W4 * f4
+ msac.w %a3u, %d0l, %acc2 | - W6 * f2
+ mac.w %a1u, %d1l, %acc2 | + W2 * f6
+
+ | ^ move.l %acc0, %acc3 %acc3 = W0 * f0 + W4 * f4
+ msac.w %a1u, %d0l, %acc3 | - W2 * f2
+ msac.w %a3u, %d1l, %acc3 | - W6 * f6
+
+ moveq.l #12, %d1 | shift amount
+
+ move.l %acc0, %d0 | block[7] = (a0
+ sub.l %d4,%d0 | - b0)
+ asr.l %d1, %d0 | >> 12
+ move.w %d0, (7*16,%a4)
+
+ move.l %acc1, %d0 | block[6] = (a1
+ sub.l %d5,%d0 | - b1)
+ asr.l %d1, %d0 | >> 12
+ move.w %d0, (6*16,%a4)
+
+ move.l %acc2, %d0 | block[5] = (a2
+ sub.l %d6,%d0 | - b2)
+ asr.l %d1, %d0 | >> 12
+ move.w %d0, (5*16,%a4)
+
+ move.l %acc3, %d0 | block[4] = (a3
+ sub.l %d7,%d0 | - b3)
+ asr.l %d1, %d0 | >> 12
+ move.w %d0, (4*16,%a4)
+
+ movclr.l %acc3, %d0 | block[3] = (a3
+ add.l %d7, %d0 | + b3)
+ asr.l %d1, %d0 | >> 12
+ move.w %d0, (3*16,%a4)
+
+ movclr.l %acc2, %d0 | block[2] = (a2
+ add.l %d6, %d0 | + b2)
+ asr.l %d1, %d0 | >> 12
+ move.w %d0, (2*16,%a4)
+
+ movclr.l %acc1, %d0 | block[1] = (a1
+ add.l %d5, %d0 | + b1)
+ asr.l %d1, %d0 | >> 12
+ move.w %d0, (1*16,%a4)
+
+ movclr.l %acc0, %d0 | block[0] = (a0
+ add.l %d4, %d0 | + b0)
+ asr.l %d1, %d0 | >> 12
+ move.w %d0, (%a4)+ | advance to next temp column
+
+ subq.l #1, %d3 | loop 8 times
+ bne.w .row_loop
+
+ | %a6 now points to the temp buffer, where we need it.
+ lea.l (-16-128,%a4), %a4 | point %a4 back to the input block
+ moveq.l #8, %d3 | loop counter
+
+.col_loop:
+ movem.l (%a6), %d0-%d2/%a5 | fetch (f0, f2, f4, f6, f1, f3, f5, f7)
+
+ mac.w %a0l, %d2u, %acc0 | %acc0 = W1 * f1
+ mac.w %a1l, %d2l, %acc0 | + W3 * f3
+ mac.w %a2l, %a5u, %acc0 | + W5 * f5
+ mac.w %a3l, %a5l, %acc0 | + W7 * f7
+
+ mac.w %a1l, %d2u, %acc1 | %acc1 = W3 * f1
+ msac.w %a3l, %d2l, %acc1 | - W7 * f3
+ msac.w %a0l, %a5u, %acc1 | - W1 * f5
+ msac.w %a2l, %a5l, %acc1 | - W5 * f7
+
+ mac.w %a2l, %d2u, %acc2 | %acc2 = W5 * f1
+ msac.w %a0l, %d2l, %acc2 | - W1 * f3
+ mac.w %a3l, %a5u, %acc2 | + W7 * f5
+ mac.w %a1l, %a5l, %acc2 | + W3 * f7
+
+ mac.w %a3l, %d2u, %acc3 | %acc3 = W7 * f1
+ msac.w %a2l, %d2l, %acc3 | - W5 * f3
+ mac.w %a1l, %a5u, %acc3 | + W3 * f5
+ msac.w %a0l, %a5l, %acc3 | - W1 * f7
+
+ lea.l (16,%a6), %a6 | Advance to next row; put here to fill EMAC latency
+ add.l #(32<<16), %d0 | DC offset: 0.5
+
+ movclr.l %acc0, %d4 | b0
+ movclr.l %acc1, %d5 | b1
+ movclr.l %acc2, %d6 | b2
+ movclr.l %acc3, %d7 | b3
+
+ mac.w %a0u, %d0u, %acc0 | %acc0 = W0 * f0
+ mac.w %a2u, %d1u, %acc0 | + W4 * f4
+ move.l %acc0, %acc3
+ mac.w %a1u, %d0l, %acc0 | + W2 * f2
+ mac.w %a3u, %d1l, %acc0 | + W6 * f6
+
+ mac.w %a0u, %d0u, %acc1 | %acc1 = W0 * f0
+ msac.w %a2u, %d1u, %acc1 | - W4 * f4
+ move.l %acc1, %acc2
+ mac.w %a3u, %d0l, %acc1 | + W6 * f2
+ msac.w %a1u, %d1l, %acc1 | - W2 * f6
+
+ | ^ move.l %acc1, %acc2 %acc2 = W0 * f0 - W4 * f4
+ msac.w %a3u, %d0l, %acc2 | - W6 * f2
+ mac.w %a1u, %d1l, %acc2 | + W2 * f6
+
+ | ^ move.l %acc0, %acc3 %acc3 = W0 * f0 + W4 * f4
+ msac.w %a1u, %d0l, %acc3 | - W2 * f2
+ msac.w %a3u, %d1l, %acc3 | - W6 * f6
+
+ moveq.l #17, %d1 | shift amount
+
+ move.l %acc0, %d0 | block[7] = (a0
+ sub.l %d4,%d0 | - b0)
+ asr.l %d1, %d0 | >> 17
+ move.w %d0, (7*16,%a4)
+
+ move.l %acc1, %d0 | block[6] = (a1
+ sub.l %d5,%d0 | - b1)
+ asr.l %d1, %d0 | >> 17
+ move.w %d0, (6*16,%a4)
+
+ move.l %acc2, %d0 | block[5] = (a2
+ sub.l %d6,%d0 | - b2)
+ asr.l %d1, %d0 | >> 17
+ move.w %d0, (5*16,%a4)
+
+ move.l %acc3, %d0 | block[4] = (a3
+ sub.l %d7,%d0 | - b3)
+ asr.l %d1, %d0 | >> 17
+ move.w %d0, (4*16,%a4)
+
+ movclr.l %acc3, %d0 | block[3] = (a3
+ add.l %d7, %d0 | + b3)
+ asr.l %d1, %d0 | >> 17
+ move.w %d0, (3*16,%a4)
+
+ movclr.l %acc2, %d0 | block[2] = (a2
+ add.l %d6, %d0 | + b2)
+ asr.l %d1, %d0 | >> 17
+ move.w %d0, (2*16,%a4)
+
+ movclr.l %acc1, %d0 | block[1] = (a1
+ add.l %d5, %d0 | + b1)
+ asr.l %d1, %d0 | >> 17
+ move.w %d0, (1*16,%a4)
+
+ movclr.l %acc0, %d0 | block[0] = (a0
+ add.l %d4, %d0 | + b0)
+ asr.l %d1, %d0 | >> 17
+ move.w %d0, (%a4)+ | advance to next column
+
+ subq.l #1, %d3 | loop 8 times
+ bne.w .col_loop
+
+ rts
+
+ .align 2
+
+mpeg2_idct_copy:
+ lea.l (-11*4,%sp), %sp
+ movem.l %d2-%d7/%a2-%a6, (%sp) | save some registers
+ move.l (11*4+4,%sp), %a0 | %a0 - block pointer for idct
+
+ bsr.w .idct | apply idct to block
+ movem.l (11*4+4,%sp), %a0-%a2 | %a0 - block pointer
+ | %a1 - destination pointer
+ | %a2 - stride
+
+ move.l #255, %d1 | preload constant for clipping
+ moveq.l #8, %d4 | loop counter
+
+.copy_clip_loop:
+ move.w (%a0), %d0 | load block[0]
+ ext.l %d0 | sign extend
+ cmp.l %d1, %d0 | overflow?
+ bls.b 1f
+ spl.b %d0 | yes: set appropriate limit value in low byte
+1:
+ move.b %d0, %d2 | collect output bytes 0..3 in %d2
+ lsl.l #8, %d2
+
+ move.w (2,%a0), %d0 | load block[1]
+ ext.l %d0 | sign extend
+ cmp.l %d1, %d0 | overflow?
+ bls.b 1f
+ spl.b %d0 | yes: set appropriate limit value in low byte
+1:
+ move.b %d0, %d2 | collect output bytes 0..3 in %d2
+ lsl.l #8, %d2
+ clr.l (%a0)+ | clear block[0] and block[1],
+ | %a0 now pointing to block[2]
+ move.w (%a0), %d0 | do b2 and b3
+ ext.l %d0
+ cmp.l %d1, %d0
+ bls.b 1f
+ spl.b %d0
+1:
+ move.b %d0, %d2
+ lsl.l #8, %d2
+
+ move.w (2,%a0), %d0
+ ext.l %d0
+ cmp.l %d1, %d0
+ bls.b 1f
+ spl.b %d0
+1:
+ move.b %d0, %d2
+ clr.l (%a0)+
+
+ move.w (%a0), %d0 | do b4 and b5
+ ext.l %d0
+ cmp.l %d1, %d0
+ bls.b 1f
+ spl.b %d0
+1:
+ move.b %d0, %d3
+ lsl.l #8, %d3
+
+ move.w (2,%a0), %d0
+ ext.l %d0
+ cmp.l %d1, %d0
+ bls.b 1f
+ spl.b %d0
+1:
+ move.b %d0, %d3
+ lsl.l #8, %d3
+ clr.l (%a0)+
+
+ move.w (%a0), %d0 | do b6 and b7
+ ext.l %d0
+ cmp.l %d1, %d0
+ bls.b 1f
+ spl.b %d0
+1:
+ move.b %d0, %d3
+ lsl.l #8, %d3
+
+ move.w (2,%a0), %d0
+ ext.l %d0
+ cmp.l %d1, %d0
+ bls.b 1f
+ spl.b %d0
+1:
+ move.b %d0, %d3
+ clr.l (%a0)+
+
+ movem.l %d2-%d3, (%a1) | write all 8 output bytes at once
+ add.l %a2, %a1 | advance output pointer
+ subq.l #1, %d4 | loop 8 times
+ bne.w .copy_clip_loop
+
+ movem.l (%sp), %d2-%d7/%a2-%a6
+ lea.l (11*4,%sp), %sp
+ rts
+
+ .align 2
+
+mpeg2_idct_add:
+ lea.l (-11*4,%sp), %sp
+ movem.l %d2-%d7/%a2-%a6, (%sp)
+ movem.l (11*4+4,%sp), %d0/%a0-%a2 | %d0 - last value
+ | %a0 - block pointer
+ | %a1 - destination pointer
+ | %a2 - stride
+
+ cmp.l #129, %d0 | last == 129 ?
+ bne.b .idct_add | no: perform idct + addition
+ move.w (%a0), %d0
+ ext.l %d0 | ((block[0]
+ asr.l #4, %d0 | >> 4)
+ and.l #7, %d0 | & 7)
+ subq.l #4, %d0 | - 4 == 0 ?
+ bne.w .dc_add | no: just perform addition
+
+.idct_add:
+ bsr.w .idct | apply idct
+ movem.l (11*4+8,%sp), %a0-%a2 | reload arguments %a0..%a2
+
+ move.l #255, %d2 | preload constant for clipping
+ clr.l %d3 | used for splitting input words into bytes
+ moveq.l #8, %d4 | loop counter
+
+.add_clip_loop:
+ movem.l (%a1), %d6-%d7 | fetch (b0 b1 b2 b3) (b4 b5 b6 b7)
+ swap %d6 | (b2 b3 b0 b1)
+ swap %d7 | (b6 b7 b4 b5)
+
+ move.w (2,%a0), %d0 | load block[1]
+ ext.l %d0 | sign extend
+ move.b %d6, %d3 | copy b1
+ lsr.l #8, %d6 | prepare 1st buffer for next byte
+ add.l %d3, %d0 | add b1
+ cmp.l %d2, %d0 | overflow ?
+ bls.b 1f
+ spl.b %d0 | yes: set appropriate limit value in low byte
+1:
+ move.w (%a0), %d1 | load block[0]
+ ext.l %d1 | sign extend
+ move.b %d6, %d3 | copy b0
+ lsr.l #8, %d6 | prepare 1st buffer for next byte
+ add.l %d3, %d1 | add b0
+ cmp.l %d2, %d1 | overflow ?
+ bls.b 1f
+ spl.b %d1 | yes: set appropriate limit value in low byte
+1:
+ move.b %d1, %d5 | collect output bytes 0..3 in %d5
+ lsl.l #8, %d5
+ move.b %d0, %d5
+ lsl.l #8, %d5
+ clr.l (%a0)+ | clear block[0] and block[1]
+ | %a0 now pointing to block[2]
+ move.w (2,%a0), %d0 | do b3 and b2
+ ext.l %d0
+ move.b %d6, %d3
+ lsr.l #8, %d6
+ add.l %d3, %d0
+ cmp.l %d2, %d0
+ bls.b 1f
+ spl.b %d0
+1:
+ move.w (%a0), %d1
+ ext.l %d1
+ add.l %d6, %d1
+ cmp.l %d2, %d1
+ bls.b 1f
+ spl.b %d1
+1:
+ move.b %d1, %d5
+ lsl.l #8, %d5
+ move.b %d0, %d5
+ clr.l (%a0)+
+
+ move.w (2,%a0), %d0 | do b5 and b4
+ ext.l %d0
+ move.b %d7, %d3
+ lsr.l #8, %d7
+ add.l %d3, %d0
+ cmp.l %d2, %d0
+ bls.b 1f
+ spl.b %d0
+1:
+ move.w (%a0), %d1
+ ext.l %d1
+ move.b %d7, %d3
+ lsr.l #8, %d7
+ add.l %d3, %d1
+ cmp.l %d2, %d1
+ bls.b 1f
+ spl.b %d1
+1:
+ move.b %d1, %d6
+ lsl.l #8, %d6
+ move.b %d0, %d6
+ lsl.l #8, %d6
+ clr.l (%a0)+
+
+ move.w (2,%a0), %d0 | do b7 and b6
+ ext.l %d0
+ move.b %d7, %d3
+ lsr.l #8, %d7
+ add.l %d3, %d0
+ cmp.l %d2, %d0
+ bls.b 1f
+ spl.b %d0
+1:
+ move.w (%a0), %d1
+ ext.l %d1
+ add.l %d7, %d1
+ cmp.l %d2, %d1
+ bls.b 1f
+ spl.b %d1
+1:
+ move.b %d1, %d6
+ lsl.l #8, %d6
+ move.b %d0, %d6
+ clr.l (%a0)+
+
+ movem.l %d5-%d6, (%a1) | write all 8 output bytes at once
+ add.l %a2, %a1 | advance output pointer
+ subq.l #1, %d4 | loop 8 times
+ bne.w .add_clip_loop
+
+ bra.w .idct_add_end
+
+.dc_add:
+ move.w (%a0), %d0
+ ext.l %d0 | %d0 = (block[0]
+ add.l #64, %d0 | + 64)
+ asr.l #7, %d0 | >> 7
+ clr.w (%a0) | clear block[0]
+ clr.w (63*2,%a0) | and block[63]
+ move.l %d0, %a0 | DC value in %a0
+
+ move.l #255, %d2 | preload constant for clipping
+ clr.l %d3 | for splitting input words into bytes
+ moveq.l #8, %d4 | loop counter
+
+.dc_clip_loop:
+ movem.l (%a1), %d6-%d7 | (b0 b1 b2 b3) (b4 b5 b6 b7)
+ swap %d6 | (b2 b3 b0 b1)
+ swap %d7 | (b6 b7 b4 b5)
+
+ move.l %a0, %d0 | copy DC
+ move.b %d6, %d3 | copy b1
+ lsr.l #8, %d6 | prepare 1st buffer for next byte
+ add.l %d3, %d0 | add b1
+ cmp.l %d2, %d0 | overflow ?
+ bls.b 1f
+ spl.b %d0 | yes: set appropriate limit value in low byte
+1:
+ move.l %a0, %d1 | copy DC
+ move.b %d6, %d3 | copy b0
+ lsr.l #8, %d6 | prepare 1st buffer for next byte
+ add.l %d3, %d1 | add b0
+ cmp.l %d2, %d1 | overflow ?
+ bls.b 1f
+ spl.b %d1 | yes: set appropriate limit value in low byte
+1:
+ move.b %d1, %d5 | collect output bytes 0..3 in %d5
+ lsl.l #8, %d5
+ move.b %d0, %d5
+ lsl.l #8, %d5
+
+ move.l %a0, %d0 | do b3 and b2
+ move.b %d6, %d3
+ lsr.l #8, %d6
+ add.l %d3, %d0
+ cmp.l %d2, %d0
+ bls.b 1f
+ spl.b %d0
+1:
+ move.l %a0, %d1
+ add.l %d6, %d1
+ cmp.l %d2, %d1
+ bls.b 1f
+ spl.b %d1
+1:
+ move.b %d1, %d5
+ lsl.l #8, %d5
+ move.b %d0, %d5
+
+ move.l %a0, %d0 | do b5 and b4
+ move.b %d7, %d3
+ lsr.l #8, %d7
+ add.l %d3, %d0
+ cmp.l %d2, %d0
+ bls.b 1f
+ spl.b %d0
+1:
+ move.l %a0, %d1
+ move.b %d7, %d3
+ lsr.l #8, %d7
+ add.l %d3, %d1
+ cmp.l %d2, %d1
+ bls.b 1f
+ spl.b %d1
+1:
+ move.b %d1, %d6 | do b7 and b6
+ lsl.l #8, %d6
+ move.b %d0, %d6
+ lsl.l #8, %d6
+
+ move.l %a0, %d0
+ move.b %d7, %d3
+ lsr.l #8, %d7
+ add.l %d3, %d0
+ cmp.l %d2, %d0
+ bls.b 1f
+ spl.b %d0
+1:
+ move.l %a0, %d1
+ add.l %d7, %d1
+ cmp.l %d2, %d1
+ bls.b 1f
+ spl.b %d1
+1:
+ move.b %d1, %d6
+ lsl.l #8, %d6
+ move.b %d0, %d6
+
+ movem.l %d5-%d6, (%a1) | write all 8 output bytes at once
+ add.l %a2, %a1 | advance output pointer
+ subq.l #1, %d4 | loop 8 times
+ bne.w .dc_clip_loop
+
+.idct_add_end:
+ movem.l (%sp), %d2-%d7/%a2-%a6
+ lea.l (11*4,%sp), %sp
+ rts
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 21:01:59 +0000