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/*
* Originally provided by Intel at Application Note AP-922.
*
* Column code adapted from Peter Gubanov.
* Copyright (c) 2000-2001 Peter Gubanov <peter@elecard.net.ru>
* http://www.elecard.com/peter/idct.shtml
* rounding trick copyright (c) 2000 Michel Lespinasse <walken@zoy.org>
*
* MMI port and (c) 2002 by Leon van Stuivenberg
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/common.h"
#include "libavcodec/dsputil.h"
#include "mmi.h"
#define BITS_INV_ACC 5 // 4 or 5 for IEEE
#define SHIFT_INV_ROW (16 - BITS_INV_ACC)
#define SHIFT_INV_COL (1 + BITS_INV_ACC)
#define TG1 6518
#define TG2 13573
#define TG3 21895
#define CS4 23170
#define ROUNDER_0 0
#define ROUNDER_1 16
#define TAB_i_04 (32+0)
#define TAB_i_17 (32+64)
#define TAB_i_26 (32+128)
#define TAB_i_35 (32+192)
#define TG_1_16 (32+256+0)
#define TG_2_16 (32+256+16)
#define TG_3_16 (32+256+32)
#define COS_4_16 (32+256+48)
#define CLIPMAX (32+256+64+0)
static short consttable[] align16 = {
/* rounder 0*/ // assume SHIFT_INV_ROW == 11
0x3ff, 1, 0x3ff, 1, 0x3ff, 1, 0x3ff, 1,
/* rounder 1*/
0x3ff, 0, 0x3ff, 0, 0x3ff, 0, 0x3ff, 0,
/* row 0/4*/
16384, 21407, -16384, -21407, 22725, 19266, -22725, -12873,
8867, 16384, 8867, 16384, 4520, 12873, -4520, 19266,
16384, -8867, 16384, -8867, 12873, -22725, 19266, -22725,
21407, -16384, -21407, 16384, 19266, 4520, -12873, 4520,
/* row 1/7*/
22725, 29692, -22725, -29692, 31521, 26722, -31521, -17855,
12299, 22725, 12299, 22725, 6270, 17855, -6270, 26722,
22725, -12299, 22725, -12299, 17855, -31521, 26722, -31521,
29692, -22725, -29692, 22725, 26722, 6270, -17855, 6270,
/* row 2/6*/
21407, 27969, -21407, -27969, 29692, 25172, -29692, -16819,
11585, 21407, 11585, 21407, 5906, 16819, -5906, 25172,
21407, -11585, 21407, -11585, 16819, -29692, 25172, -29692,
27969, -21407, -27969, 21407, 25172, 5906, -16819, 5906,
/*row 3/5*/
19266, 25172, -19266, -25172, 26722, 22654, -26722, -15137,
10426, 19266, 10426, 19266, 5315, 15137, -5315, 22654,
19266, -10426, 19266, -10426, 15137, -26722, 22654, -26722,
25172, -19266, -25172, 19266, 22654, 5315, -15137, 5315,
/*column constants*/
TG1, TG1, TG1, TG1, TG1, TG1, TG1, TG1,
TG2, TG2, TG2, TG2, TG2, TG2, TG2, TG2,
TG3, TG3, TG3, TG3, TG3, TG3, TG3, TG3,
CS4, CS4, CS4, CS4, CS4, CS4, CS4, CS4,
/* clamp */
255, 255, 255, 255, 255, 255, 255, 255
};
#define DCT_8_INV_ROW1(blk, rowoff, taboff, rnd, outreg) { \
lq(blk, rowoff, $16); /* r16 = x7 x5 x3 x1 x6 x4 x2 x0 */ \
/*slot*/ \
lq($24, 0+taboff, $17); /* r17 = w */ \
/*delay slot $16*/ \
lq($24, 16+taboff, $18);/* r18 = w */ \
prevh($16, $2); /* r2 = x1 x3 x5 x7 x0 x2 x4 x6 */ \
lq($24, 32+taboff, $19);/* r19 = w */ \
phmadh($17, $16, $17); /* r17 = b1"b0'a1"a0' */ \
lq($24, 48+taboff, $20);/* r20 = w */ \
phmadh($18, $2, $18); /* r18 = b1'b0"a1'a0" */ \
phmadh($19, $16, $19); /* r19 = b3"b2'a3"a2' */ \
phmadh($20, $2, $20); /* r20 = b3'b2"a3'a2" */ \
paddw($17, $18, $17); /* r17 = (b1)(b0)(a1)(a0) */ \
paddw($19, $20, $19); /* r19 = (b3)(b2)(a3)(a2) */ \
pcpyld($19, $17, $18); /* r18 = (a3)(a2)(a1)(a0) */ \
pcpyud($17, $19, $20); /* r20 = (b3)(b2)(b1)(b0) */ \
paddw($18, rnd, $18); /* r18 = (a3)(a2)(a1)(a0) */\
paddw($18, $20, $17); /* r17 = ()()()(a0+b0) */ \
psubw($18, $20, $20); /* r20 = ()()()(a0-b0) */ \
psraw($17, SHIFT_INV_ROW, $17); /* r17 = (y3 y2 y1 y0) */ \
psraw($20, SHIFT_INV_ROW, $20); /* r20 = (y4 y5 y6 y7) */ \
ppach($20, $17, outreg);/* out = y4 y5 y6 y7 y3 y2 y1 y0 Note order */ \
\
prevh(outreg, $2); \
pcpyud($2, $2, $2); \
pcpyld($2, outreg, outreg); \
}
#define DCT_8_INV_COL8() \
\
lq($24, TG_3_16, $2); /* r2 = tn3 */ \
\
pmulth($11, $2, $17); /* r17 = x3 * tn3 (6420) */ \
psraw($17, 15, $17); \
pmfhl_uw($3); /* r3 = 7531 */ \
psraw($3, 15, $3); \
pinteh($3, $17, $17); /* r17 = x3 * tn3 */ \
psubh($17, $13, $17); /* r17 = tm35 */ \
\
pmulth($13, $2, $18); /* r18 = x5 * tn3 (6420) */ \
psraw($18, 15, $18); \
pmfhl_uw($3); /* r3 = 7531 */ \
psraw($3, 15, $3); \
pinteh($3, $18, $18); /* r18 = x5 * tn3 */ \
paddh($18, $11, $18); /* r18 = tp35 */ \
\
lq($24, TG_1_16, $2); /* r2 = tn1 */ \
\
pmulth($15, $2, $19); /* r19 = x7 * tn1 (6420) */ \
psraw($19, 15, $19); \
pmfhl_uw($3); /* r3 = 7531 */ \
psraw($3, 15, $3); \
pinteh($3, $19, $19); /* r19 = x7 * tn1 */ \
paddh($19, $9, $19); /* r19 = tp17 */ \
\
pmulth($9, $2, $20); /* r20 = x1 * tn1 (6420) */ \
psraw($20, 15, $20); \
pmfhl_uw($3); /* r3 = 7531 */ \
psraw($3, 15, $3); \
pinteh($3, $20, $20); /* r20 = x1 * tn1 */ \
psubh($20, $15, $20); /* r20 = tm17 */ \
\
psubh($19, $18, $3); /* r3 = t1 */ \
paddh($20, $17, $16); /* r16 = t2 */ \
psubh($20, $17, $23); /* r23 = b3 */ \
paddh($19, $18, $20); /* r20 = b0 */ \
\
lq($24, COS_4_16, $2); /* r2 = cs4 */ \
\
paddh($3, $16, $21); /* r21 = t1+t2 */ \
psubh($3, $16, $22); /* r22 = t1-t2 */ \
\
pmulth($21, $2, $21); /* r21 = cs4 * (t1+t2) 6420 */ \
psraw($21, 15, $21); \
pmfhl_uw($3); /* r3 = 7531 */ \
psraw($3, 15, $3); \
pinteh($3, $21, $21); /* r21 = b1 */ \
\
pmulth($22, $2, $22); /* r22 = cs4 * (t1-t2) 6420 */ \
psraw($22, 15, $22); \
pmfhl_uw($3); /* r3 = 7531 */ \
psraw($3, 15, $3); \
pinteh($3, $22, $22); /* r22 = b2 */ \
\
lq($24, TG_2_16, $2); /* r2 = tn2 */ \
\
pmulth($10, $2, $17); /* r17 = x2 * tn2 (6420) */ \
psraw($17, 15, $17); \
pmfhl_uw($3); /* r3 = 7531 */ \
psraw($3, 15, $3); \
pinteh($3, $17, $17); /* r17 = x3 * tn3 */ \
psubh($17, $14, $17); /* r17 = tm26 */ \
\
pmulth($14, $2, $18); /* r18 = x6 * tn2 (6420) */ \
psraw($18, 15, $18); \
pmfhl_uw($3); /* r3 = 7531 */ \
psraw($3, 15, $3); \
pinteh($3, $18, $18); /* r18 = x6 * tn2 */ \
paddh($18, $10, $18); /* r18 = tp26 */ \
\
paddh($8, $12, $2); /* r2 = tp04 */ \
psubh($8, $12, $3); /* r3 = tm04 */ \
\
paddh($2, $18, $16); /* r16 = a0 */ \
psubh($2, $18, $19); /* r19 = a3 */ \
psubh($3, $17, $18); /* r18 = a2 */ \
paddh($3, $17, $17); /* r17 = a1 */
#define DCT_8_INV_COL8_STORE(blk) \
\
paddh($16, $20, $2); /* y0 a0+b0 */ \
psubh($16, $20, $16); /* y7 a0-b0 */ \
psrah($2, SHIFT_INV_COL, $2); \
psrah($16, SHIFT_INV_COL, $16); \
sq($2, 0, blk); \
sq($16, 112, blk); \
\
paddh($17, $21, $3); /* y1 a1+b1 */ \
psubh($17, $21, $17); /* y6 a1-b1 */ \
psrah($3, SHIFT_INV_COL, $3); \
psrah($17, SHIFT_INV_COL, $17); \
sq($3, 16, blk); \
sq($17, 96, blk); \
\
paddh($18, $22, $2); /* y2 a2+b2 */ \
psubh($18, $22, $18); /* y5 a2-b2 */ \
psrah($2, SHIFT_INV_COL, $2); \
psrah($18, SHIFT_INV_COL, $18); \
sq($2, 32, blk); \
sq($18, 80, blk); \
\
paddh($19, $23, $3); /* y3 a3+b3 */ \
psubh($19, $23, $19); /* y4 a3-b3 */ \
psrah($3, SHIFT_INV_COL, $3); \
psrah($19, SHIFT_INV_COL, $19); \
sq($3, 48, blk); \
sq($19, 64, blk);
#define DCT_8_INV_COL8_PMS() \
paddh($16, $20, $2); /* y0 a0+b0 */ \
psubh($16, $20, $20); /* y7 a0-b0 */ \
psrah($2, SHIFT_INV_COL, $16); \
psrah($20, SHIFT_INV_COL, $20); \
\
paddh($17, $21, $3); /* y1 a1+b1 */ \
psubh($17, $21, $21); /* y6 a1-b1 */ \
psrah($3, SHIFT_INV_COL, $17); \
psrah($21, SHIFT_INV_COL, $21); \
\
paddh($18, $22, $2); /* y2 a2+b2 */ \
psubh($18, $22, $22); /* y5 a2-b2 */ \
psrah($2, SHIFT_INV_COL, $18); \
psrah($22, SHIFT_INV_COL, $22); \
\
paddh($19, $23, $3); /* y3 a3+b3 */ \
psubh($19, $23, $23); /* y4 a3-b3 */ \
psrah($3, SHIFT_INV_COL, $19); \
psrah($23, SHIFT_INV_COL, $23);
#define PUT(rs) \
pminh(rs, $11, $2); \
pmaxh($2, $0, $2); \
ppacb($0, $2, $2); \
sd3(2, 0, 4); \
__asm__ volatile ("add $4, $5, $4");
#define DCT_8_INV_COL8_PUT() \
PUT($16); \
PUT($17); \
PUT($18); \
PUT($19); \
PUT($23); \
PUT($22); \
PUT($21); \
PUT($20);
#define ADD(rs) \
ld3(4, 0, 2); \
pextlb($0, $2, $2); \
paddh($2, rs, $2); \
pminh($2, $11, $2); \
pmaxh($2, $0, $2); \
ppacb($0, $2, $2); \
sd3(2, 0, 4); \
__asm__ volatile ("add $4, $5, $4");
/*fixme: schedule*/
#define DCT_8_INV_COL8_ADD() \
ADD($16); \
ADD($17); \
ADD($18); \
ADD($19); \
ADD($23); \
ADD($22); \
ADD($21); \
ADD($20);
void ff_mmi_idct(int16_t * block)
{
/* $4 = block */
__asm__ volatile("la $24, %0"::"m"(consttable[0]));
lq($24, ROUNDER_0, $8);
lq($24, ROUNDER_1, $7);
DCT_8_INV_ROW1($4, 0, TAB_i_04, $8, $8);
DCT_8_INV_ROW1($4, 16, TAB_i_17, $7, $9);
DCT_8_INV_ROW1($4, 32, TAB_i_26, $7, $10);
DCT_8_INV_ROW1($4, 48, TAB_i_35, $7, $11);
DCT_8_INV_ROW1($4, 64, TAB_i_04, $7, $12);
DCT_8_INV_ROW1($4, 80, TAB_i_35, $7, $13);
DCT_8_INV_ROW1($4, 96, TAB_i_26, $7, $14);
DCT_8_INV_ROW1($4, 112, TAB_i_17, $7, $15);
DCT_8_INV_COL8();
DCT_8_INV_COL8_STORE($4);
//let savedtemp regs be saved
__asm__ volatile(" ":::"$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23");
}
void ff_mmi_idct_put(uint8_t *dest, int line_size, DCTELEM *block)
{
/* $4 = dest, $5 = line_size, $6 = block */
__asm__ volatile("la $24, %0"::"m"(consttable[0]));
lq($24, ROUNDER_0, $8);
lq($24, ROUNDER_1, $7);
DCT_8_INV_ROW1($6, 0, TAB_i_04, $8, $8);
DCT_8_INV_ROW1($6, 16, TAB_i_17, $7, $9);
DCT_8_INV_ROW1($6, 32, TAB_i_26, $7, $10);
DCT_8_INV_ROW1($6, 48, TAB_i_35, $7, $11);
DCT_8_INV_ROW1($6, 64, TAB_i_04, $7, $12);
DCT_8_INV_ROW1($6, 80, TAB_i_35, $7, $13);
DCT_8_INV_ROW1($6, 96, TAB_i_26, $7, $14);
DCT_8_INV_ROW1($6, 112, TAB_i_17, $7, $15);
DCT_8_INV_COL8();
lq($24, CLIPMAX, $11);
DCT_8_INV_COL8_PMS();
DCT_8_INV_COL8_PUT();
//let savedtemp regs be saved
__asm__ volatile(" ":::"$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23");
}
void ff_mmi_idct_add(uint8_t *dest, int line_size, DCTELEM *block)
{
/* $4 = dest, $5 = line_size, $6 = block */
__asm__ volatile("la $24, %0"::"m"(consttable[0]));
lq($24, ROUNDER_0, $8);
lq($24, ROUNDER_1, $7);
DCT_8_INV_ROW1($6, 0, TAB_i_04, $8, $8);
DCT_8_INV_ROW1($6, 16, TAB_i_17, $7, $9);
DCT_8_INV_ROW1($6, 32, TAB_i_26, $7, $10);
DCT_8_INV_ROW1($6, 48, TAB_i_35, $7, $11);
DCT_8_INV_ROW1($6, 64, TAB_i_04, $7, $12);
DCT_8_INV_ROW1($6, 80, TAB_i_35, $7, $13);
DCT_8_INV_ROW1($6, 96, TAB_i_26, $7, $14);
DCT_8_INV_ROW1($6, 112, TAB_i_17, $7, $15);
DCT_8_INV_COL8();
lq($24, CLIPMAX, $11);
DCT_8_INV_COL8_PMS();
DCT_8_INV_COL8_ADD();
//let savedtemp regs be saved
__asm__ volatile(" ":::"$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23");
}
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