idct_mmi.c
资源名称:tcpmp.rar [点击查看]
上传用户:wstnjxml
上传日期:2014-04-03
资源大小:7248k
文件大小:11k
源码类别:
Windows CE
开发平台:
C/C++
- /*
- Originally provided by Intel at AP-922
- http://developer.intel.com/vtune/cbts/strmsimd/922down.htm
- (See more app notes at http://developer.intel.com/vtune/cbts/strmsimd/appnotes.htm)
- but in a limited edition.
- 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 by Leon van Stuivenberg
- */
- #include "../common.h"
- #include "../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");
- }