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FFmpeg/libavcodec/ps2/idct_mmi.c

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  1. /*

  2.   Originally provided by Intel at AP-922

  3.   http://developer.intel.com/vtune/cbts/strmsimd/922down.htm

  4.   (See more app notes at http://developer.intel.com/vtune/cbts/strmsimd/appnotes.htm)

  5.   but in a limited edition.

  6. 

  7.   column code adapted from peter gubanov

  8.   Copyright (c) 2000-2001 Peter Gubanov <peter@elecard.net.ru>

  9.   http://www.elecard.com/peter/idct.shtml

  10.   Rounding trick Copyright (c) 2000 Michel Lespinasse <walken@zoy.org>

  11. 

  12.   MMI port by Leon van Stuivenberg

  13. */  

  14. #include "../common.h"

  15. #include "../dsputil.h"

  16. #include "mmi.h"

  17. 

  18. #define BITS_INV_ACC	5	// 4 or 5 for IEEE

  19. #define SHIFT_INV_ROW	(16 - BITS_INV_ACC)

  20. #define SHIFT_INV_COL   (1 + BITS_INV_ACC)

  21. 

  22. #define TG1	6518

  23. #define TG2	13573

  24. #define TG3	21895

  25. #define CS4	23170

  26. 

  27. #define ROUNDER_0	0

  28. #define ROUNDER_1	16

  29. 

  30. #define TAB_i_04	(32+0)

  31. #define TAB_i_17	(32+64)

  32. #define TAB_i_26	(32+128)

  33. #define TAB_i_35	(32+192)

  34. 

  35. #define TG_1_16		(32+256+0)

  36. #define TG_2_16		(32+256+16)

  37. #define TG_3_16		(32+256+32)

  38. #define COS_4_16	(32+256+48)

  39. 

  40. #define CLIPMAX		(32+256+64+0)

  41. 

  42. static short consttable[] align16 = {

  43. /* rounder 0*/	// assume SHIFT_INV_ROW == 11

  44.  0x3ff, 1, 0x3ff, 1, 0x3ff, 1, 0x3ff, 1,

  45. /* rounder 1*/

  46.  0x3ff, 0, 0x3ff, 0, 0x3ff, 0, 0x3ff, 0,

  47. /* row 0/4*/

  48.  16384,  21407, -16384, -21407,  22725,  19266, -22725, -12873, 

  49.   8867,  16384,   8867,  16384,   4520,  12873,  -4520,  19266, 

  50.  16384,  -8867,  16384,  -8867,  12873, -22725,  19266, -22725, 

  51.  21407, -16384, -21407,  16384,  19266,   4520, -12873,   4520, 

  52. /* row 1/7*/

  53.  22725,  29692, -22725, -29692,  31521,  26722, -31521, -17855, 

  54.  12299,  22725,  12299,  22725,   6270,  17855,  -6270,  26722, 

  55.  22725, -12299,  22725, -12299,  17855, -31521,  26722, -31521, 

  56.  29692, -22725, -29692,  22725,  26722,   6270, -17855,   6270, 

  57. /* row 2/6*/

  58.  21407,  27969, -21407, -27969,  29692,  25172, -29692, -16819, 

  59.  11585,  21407,  11585,  21407,   5906,  16819,  -5906,  25172, 

  60.  21407, -11585,  21407, -11585,  16819, -29692,  25172, -29692, 

  61.  27969, -21407, -27969,  21407,  25172,   5906, -16819,   5906, 

  62. /*row 3/5*/

  63.  19266,  25172, -19266, -25172,  26722,  22654, -26722, -15137, 

  64.  10426,  19266,  10426,  19266,   5315,  15137,  -5315,  22654, 

  65.  19266, -10426,  19266, -10426,  15137, -26722,  22654, -26722, 

  66.  25172, -19266, -25172,  19266,  22654,   5315, -15137,   5315,

  67. /*column constants*/

  68.  TG1, TG1, TG1, TG1, TG1, TG1, TG1, TG1,

  69.  TG2, TG2, TG2, TG2, TG2, TG2, TG2, TG2,

  70.  TG3, TG3, TG3, TG3, TG3, TG3, TG3, TG3,

  71.  CS4, CS4, CS4, CS4, CS4, CS4, CS4, CS4,

  72. /* clamp */

  73.  255, 255, 255, 255, 255, 255, 255, 255

  74. };

  75. 

  76. 

  77. #define DCT_8_INV_ROW1(blk, rowoff, taboff, rnd, outreg) { \

  78. 	lq(blk, rowoff, $16);	/* r16 = x7  x5  x3  x1  x6  x4  x2  x0 */ \

  79. 	/*slot*/ \

  80. 	lq($24, 0+taboff, $17);	/* r17 = w */ \

  81. 	/*delay slot $16*/ \

  82. 	lq($24, 16+taboff, $18);/* r18 = w */ \

  83. 	prevh($16, $2);		/* r2  = x1  x3  x5  x7  x0  x2  x4  x6 */ \

  84. 	lq($24, 32+taboff, $19);/* r19 = w */ \

  85. 	phmadh($17, $16, $17);	/* r17 = b1"b0'a1"a0' */ \

  86. 	lq($24, 48+taboff, $20);/* r20 = w */ \

  87. 	phmadh($18, $2, $18);	/* r18 = b1'b0"a1'a0" */ \

  88. 	phmadh($19, $16, $19);	/* r19 = b3"b2'a3"a2' */ \

  89. 	phmadh($20, $2, $20);	/* r20 = b3'b2"a3'a2" */ \

  90. 	paddw($17, $18, $17);	/* r17 = (b1)(b0)(a1)(a0) */ \

  91. 	paddw($19, $20, $19);	/* r19 = (b3)(b2)(a3)(a2) */ \

  92. 	pcpyld($19, $17, $18);	/* r18 = (a3)(a2)(a1)(a0) */ \

  93. 	pcpyud($17, $19, $20);	/* r20 = (b3)(b2)(b1)(b0) */ \

  94. 	paddw($18, rnd, $18);	/* r18 = (a3)(a2)(a1)(a0) */\

  95. 	paddw($18, $20, $17);	/* r17 = ()()()(a0+b0) */ \

  96. 	psubw($18, $20, $20);	/* r20 = ()()()(a0-b0) */ \

  97. 	psraw($17, SHIFT_INV_ROW, $17); /* r17 = (y3 y2 y1 y0) */ \

  98. 	psraw($20, SHIFT_INV_ROW, $20);	/* r20 = (y4 y5 y6 y7) */ \

  99. 	ppach($20, $17, outreg);/* out = y4 y5 y6 y7 y3 y2 y1 y0  Note order */ \

  100. \

  101. 	prevh(outreg, $2);	\

  102. 	pcpyud($2, $2, $2);	\

  103. 	pcpyld($2, outreg, outreg);	\

  104. }

  105. 

  106. 

  107. #define DCT_8_INV_COL8() \

  108. \

  109. 	lq($24, TG_3_16, $2);	/* r2  = tn3 */	\

  110. \

  111. 	pmulth($11, $2, $17);	/* r17 = x3 * tn3 (6420) */ \

  112. 	psraw($17, 15, $17);	\

  113. 	pmfhl_uw($3);		/* r3  = 7531 */	\

  114. 	psraw($3, 15, $3);	\

  115. 	pinteh($3, $17, $17);	/* r17 = x3 * tn3 */ \

  116. 	psubh($17, $13, $17);	/* r17 = tm35 */	\

  117. \

  118. 	pmulth($13, $2, $18);	/* r18 = x5 * tn3 (6420) */ \

  119. 	psraw($18, 15, $18);	\

  120. 	pmfhl_uw($3);		/* r3  = 7531 */	\

  121. 	psraw($3, 15, $3);	\

  122. 	pinteh($3, $18, $18);	/* r18 = x5 * tn3 */ \

  123. 	paddh($18, $11, $18);	/* r18 = tp35 */	\

  124. \

  125. 	lq($24, TG_1_16, $2);	/* r2  = tn1 */	\

  126. \

  127. 	pmulth($15, $2, $19);	/* r19 = x7 * tn1 (6420) */ \

  128. 	psraw($19, 15, $19);	\

  129. 	pmfhl_uw($3);		/* r3  = 7531 */	\

  130. 	psraw($3, 15, $3);	\

  131. 	pinteh($3, $19, $19);	/* r19 = x7 * tn1 */ \

  132. 	paddh($19, $9, $19);	/* r19 = tp17 */	\

  133. \

  134. 	pmulth($9, $2, $20);	/* r20 = x1 * tn1 (6420) */ \

  135. 	psraw($20, 15, $20);	\

  136. 	pmfhl_uw($3);		/* r3  = 7531 */	\

  137. 	psraw($3, 15, $3);	\

  138. 	pinteh($3, $20, $20);	/* r20 = x1 * tn1 */ \

  139. 	psubh($20, $15, $20);	/* r20 = tm17 */	\

  140. \

  141. 	psubh($19, $18, $3);	/* r3  = t1 */	\

  142. 	paddh($20, $17, $16);	/* r16 = t2 */	\

  143. 	psubh($20, $17, $23);	/* r23 = b3 */	\

  144. 	paddh($19, $18, $20);	/* r20 = b0 */	\

  145. \

  146. 	lq($24, COS_4_16, $2);	/* r2  = cs4 */	\

  147. \

  148. 	paddh($3, $16, $21);	/* r21 = t1+t2 */	\

  149. 	psubh($3, $16, $22);	/* r22 = t1-t2 */	\

  150. \

  151. 	pmulth($21, $2, $21);	/* r21 = cs4 * (t1+t2) 6420 */ \

  152. 	psraw($21, 15, $21);	\

  153. 	pmfhl_uw($3);		/* r3  = 7531 */	\

  154. 	psraw($3, 15, $3);	\

  155. 	pinteh($3, $21, $21);	/* r21 = b1 */	\

  156. \

  157. 	pmulth($22, $2, $22);	/* r22 = cs4 * (t1-t2) 6420 */ \

  158. 	psraw($22, 15, $22);	\

  159. 	pmfhl_uw($3);		/* r3  = 7531 */	\

  160. 	psraw($3, 15, $3);	\

  161. 	pinteh($3, $22, $22);	/* r22 = b2 */	\

  162. \

  163. 	lq($24, TG_2_16, $2);	/* r2  = tn2 */	\

  164. \

  165. 	pmulth($10, $2, $17);	/* r17 = x2 * tn2 (6420) */ \

  166. 	psraw($17, 15, $17);	\

  167. 	pmfhl_uw($3);		/* r3  = 7531 */	\

  168. 	psraw($3, 15, $3);	\

  169. 	pinteh($3, $17, $17);	/* r17 = x3 * tn3 */ \

  170. 	psubh($17, $14, $17);	/* r17 = tm26 */	\

  171. \

  172. 	pmulth($14, $2, $18);	/* r18 = x6 * tn2 (6420) */ \

  173. 	psraw($18, 15, $18);	\

  174. 	pmfhl_uw($3);		/* r3  = 7531 */	\

  175. 	psraw($3, 15, $3);	\

  176. 	pinteh($3, $18, $18);	/* r18 = x6 * tn2 */ \

  177. 	paddh($18, $10, $18);	/* r18 = tp26 */	\

  178. \

  179. 	paddh($8, $12, $2);	/* r2  = tp04 */	\

  180. 	psubh($8, $12, $3);	/* r3  = tm04 */	\

  181. \

  182. 	paddh($2, $18, $16);	/* r16 = a0 */			\

  183. 	psubh($2, $18, $19);	/* r19 = a3 */			\

  184. 	psubh($3, $17, $18);	/* r18 = a2 */			\

  185. 	paddh($3, $17, $17);	/* r17 = a1 */

  186. 

  187. 

  188. #define DCT_8_INV_COL8_STORE(blk) \

  189. \

  190. 	paddh($16, $20, $2);	/* y0  a0+b0 */		\

  191. 	psubh($16, $20, $16);	/* y7  a0-b0 */		\

  192. 	psrah($2, SHIFT_INV_COL, $2);		\

  193. 	psrah($16, SHIFT_INV_COL, $16);		\

  194. 	sq($2, 0, blk); 			\

  195. 	sq($16, 112, blk); 			\

  196. \

  197. 	paddh($17, $21, $3);	/* y1  a1+b1 */		\

  198. 	psubh($17, $21, $17);	/* y6  a1-b1 */		\

  199. 	psrah($3, SHIFT_INV_COL, $3);		\

  200. 	psrah($17, SHIFT_INV_COL, $17);		\

  201. 	sq($3, 16, blk);			\

  202. 	sq($17, 96, blk);			\

  203. \

  204. 	paddh($18, $22, $2);	/* y2  a2+b2 */	\

  205. 	psubh($18, $22, $18);	/* y5  a2-b2 */	\

  206. 	psrah($2, SHIFT_INV_COL, $2);	\

  207. 	psrah($18, SHIFT_INV_COL, $18);	\

  208. 	sq($2, 32, blk);			\

  209. 	sq($18, 80, blk);			\

  210. \

  211. 	paddh($19, $23, $3);	/* y3  a3+b3 */	\

  212. 	psubh($19, $23, $19);	/* y4  a3-b3 */	\

  213. 	psrah($3, SHIFT_INV_COL, $3);	\

  214. 	psrah($19, SHIFT_INV_COL, $19);	\

  215. 	sq($3, 48, blk);			\

  216. 	sq($19, 64, blk);

  217. 

  218. 

  219. 

  220. #define DCT_8_INV_COL8_PMS() \

  221. 	paddh($16, $20, $2);	/* y0  a0+b0 */		\

  222. 	psubh($16, $20, $20);	/* y7  a0-b0 */		\

  223. 	psrah($2, SHIFT_INV_COL, $16);		\

  224. 	psrah($20, SHIFT_INV_COL, $20);		\

  225. \

  226. 	paddh($17, $21, $3);	/* y1  a1+b1 */		\

  227. 	psubh($17, $21, $21);	/* y6  a1-b1 */		\

  228. 	psrah($3, SHIFT_INV_COL, $17);		\

  229. 	psrah($21, SHIFT_INV_COL, $21);		\

  230. \

  231. 	paddh($18, $22, $2);	/* y2  a2+b2 */	\

  232. 	psubh($18, $22, $22);	/* y5  a2-b2 */	\

  233. 	psrah($2, SHIFT_INV_COL, $18);	\

  234. 	psrah($22, SHIFT_INV_COL, $22);	\

  235. \

  236. 	paddh($19, $23, $3);	/* y3  a3+b3 */	\

  237. 	psubh($19, $23, $23);	/* y4  a3-b3 */	\

  238. 	psrah($3, SHIFT_INV_COL, $19);	\

  239. 	psrah($23, SHIFT_INV_COL, $23);

  240. 

  241. #define PUT(rs) \

  242. 	pminh(rs, $11, $2);	\

  243.     	pmaxh($2, $0, $2);	\

  244. 	ppacb($0, $2, $2); \

  245. 	sd3(2, 0, 4); \

  246. 	__asm__ __volatile__ ("add $4, $5, $4");

  247. 

  248. #define DCT_8_INV_COL8_PUT() \

  249.     	PUT($16);		\

  250.     	PUT($17);		\

  251.     	PUT($18);		\

  252.     	PUT($19);		\

  253.     	PUT($23);		\

  254.     	PUT($22);		\

  255.     	PUT($21);		\

  256.     	PUT($20);

  257. 

  258. #define ADD(rs) \

  259.     ld3(4, 0, 2); \

  260.     pextlb($0, $2, $2); \

  261.     paddh($2, rs, $2); \

  262.     pminh($2, $11, $2);	\

  263.     pmaxh($2, $0, $2);	\

  264.     ppacb($0, $2, $2); \

  265.     sd3(2, 0, 4); \

  266.     __asm__ __volatile__ ("add $4, $5, $4");

  267. 

  268. /*fixme: schedule*/

  269. #define DCT_8_INV_COL8_ADD() \

  270.     	ADD($16);		\

  271.     	ADD($17);		\

  272.     	ADD($18);		\

  273.     	ADD($19);		\

  274.     	ADD($23);		\

  275.     	ADD($22);		\

  276.     	ADD($21);		\

  277.     	ADD($20);

  278. 

  279. 

  280. void ff_mmi_idct(int16_t * block)

  281. {

  282.     /* $4 = block */

  283.     __asm__ __volatile__("la $24, %0"::"m"(consttable[0]));

  284.     lq($24, ROUNDER_0, $8);

  285.     lq($24, ROUNDER_1, $7);

  286.     DCT_8_INV_ROW1($4, 0, TAB_i_04, $8, $8);

  287.     DCT_8_INV_ROW1($4, 16, TAB_i_17, $7, $9);

  288.     DCT_8_INV_ROW1($4, 32, TAB_i_26, $7, $10);

  289.     DCT_8_INV_ROW1($4, 48, TAB_i_35, $7, $11);

  290.     DCT_8_INV_ROW1($4, 64, TAB_i_04, $7, $12);

  291.     DCT_8_INV_ROW1($4, 80, TAB_i_35, $7, $13);

  292.     DCT_8_INV_ROW1($4, 96, TAB_i_26, $7, $14);

  293.     DCT_8_INV_ROW1($4, 112, TAB_i_17, $7, $15);

  294.     DCT_8_INV_COL8();

  295.     DCT_8_INV_COL8_STORE($4);

  296.  

  297.     //let savedtemp regs be saved

  298.     __asm__ __volatile__(" ":::"$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23");

  299. }

  300. 

  301. 

  302. void ff_mmi_idct_put(uint8_t *dest, int line_size, DCTELEM *block)

  303. {

  304.     /* $4 = dest, $5 = line_size, $6 = block */

  305.     __asm__ __volatile__("la $24, %0"::"m"(consttable[0]));

  306.     lq($24, ROUNDER_0, $8);

  307.     lq($24, ROUNDER_1, $7);

  308.     DCT_8_INV_ROW1($6, 0, TAB_i_04, $8, $8);

  309.     DCT_8_INV_ROW1($6, 16, TAB_i_17, $7, $9);

  310.     DCT_8_INV_ROW1($6, 32, TAB_i_26, $7, $10);

  311.     DCT_8_INV_ROW1($6, 48, TAB_i_35, $7, $11);

  312.     DCT_8_INV_ROW1($6, 64, TAB_i_04, $7, $12);

  313.     DCT_8_INV_ROW1($6, 80, TAB_i_35, $7, $13);

  314.     DCT_8_INV_ROW1($6, 96, TAB_i_26, $7, $14);

  315.     DCT_8_INV_ROW1($6, 112, TAB_i_17, $7, $15);

  316.     DCT_8_INV_COL8();

  317.     lq($24, CLIPMAX, $11);

  318.     DCT_8_INV_COL8_PMS();

  319.     DCT_8_INV_COL8_PUT();

  320. 

  321.     //let savedtemp regs be saved

  322.     __asm__ __volatile__(" ":::"$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23");

  323. }

  324. 

  325. 

  326. void ff_mmi_idct_add(uint8_t *dest, int line_size, DCTELEM *block)

  327. {

  328.     /* $4 = dest, $5 = line_size, $6 = block */

  329.     __asm__ __volatile__("la $24, %0"::"m"(consttable[0]));

  330.     lq($24, ROUNDER_0, $8);

  331.     lq($24, ROUNDER_1, $7);

  332.     DCT_8_INV_ROW1($6, 0, TAB_i_04, $8, $8);

  333.     DCT_8_INV_ROW1($6, 16, TAB_i_17, $7, $9);

  334.     DCT_8_INV_ROW1($6, 32, TAB_i_26, $7, $10);

  335.     DCT_8_INV_ROW1($6, 48, TAB_i_35, $7, $11);

  336.     DCT_8_INV_ROW1($6, 64, TAB_i_04, $7, $12);

  337.     DCT_8_INV_ROW1($6, 80, TAB_i_35, $7, $13);

  338.     DCT_8_INV_ROW1($6, 96, TAB_i_26, $7, $14);

  339.     DCT_8_INV_ROW1($6, 112, TAB_i_17, $7, $15);

  340.     DCT_8_INV_COL8();

  341.     lq($24, CLIPMAX, $11);

  342.     DCT_8_INV_COL8_PMS();

  343.     DCT_8_INV_COL8_ADD();

  344. 

  345.     //let savedtemp regs be saved

  346.     __asm__ __volatile__(" ":::"$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23");

  347. }