/media/libjpeg/simd/jiss2red.asm

http://github.com/zpao/v8monkey · Assembly · 594 lines · 384 code · 118 blank · 92 comment · 1 complexity · f9ecd480998fdcf167ad9b3a59c3ae4c MD5 · raw file 

    

  1. ;
    2. 

  2. ; jiss2red.asm - reduced-size IDCT (SSE2)
    3. 

  3. ;
    4. 

  4. ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
    5. 

  5. ;
    6. 

  6. ; Based on
    7. 

  7. ; x86 SIMD extension for IJG JPEG library
    8. 

  8. ; Copyright (C) 1999-2006, MIYASAKA Masaru.
    9. 

  9. ; For conditions of distribution and use, see copyright notice in jsimdext.inc
    10. 

  10. ;
    11. 

  11. ; This file should be assembled with NASM (Netwide Assembler),
    12. 

  12. ; can *not* be assembled with Microsoft's MASM or any compatible
    13. 

  13. ; assembler (including Borland's Turbo Assembler).
    14. 

  14. ; NASM is available from http://nasm.sourceforge.net/ or
    15. 

  15. ; http://sourceforge.net/project/showfiles.php?group_id=6208
    16. 

  16. ;
    17. 

  17. ; This file contains inverse-DCT routines that produce reduced-size
    18. 

  18. ; output: either 4x4 or 2x2 pixels from an 8x8 DCT block.
    19. 

  19. ; The following code is based directly on the IJG's original jidctred.c;
    20. 

  20. ; see the jidctred.c for more details.
    21. 

  21. ;
    22. 

  22. ; [TAB8]
    23. 

  23. 

  24. %include "jsimdext.inc"
    25. 

  25. %include "jdct.inc"
    26. 

  26. 

  27. ; --------------------------------------------------------------------------
    28. 

  28. 

  29. %define CONST_BITS	13
    30. 

  30. %define PASS1_BITS	2
    31. 

  31. 

  32. %define DESCALE_P1_4	(CONST_BITS-PASS1_BITS+1)
    33. 

  33. %define DESCALE_P2_4	(CONST_BITS+PASS1_BITS+3+1)
    34. 

  34. %define DESCALE_P1_2	(CONST_BITS-PASS1_BITS+2)
    35. 

  35. %define DESCALE_P2_2	(CONST_BITS+PASS1_BITS+3+2)
    36. 

  36. 

  37. %if CONST_BITS == 13
    38. 

  38. F_0_211	equ	 1730		; FIX(0.211164243)
    39. 

  39. F_0_509	equ	 4176		; FIX(0.509795579)
    40. 

  40. F_0_601	equ	 4926		; FIX(0.601344887)
    41. 

  41. F_0_720	equ	 5906		; FIX(0.720959822)
    42. 

  42. F_0_765	equ	 6270		; FIX(0.765366865)
    43. 

  43. F_0_850	equ	 6967		; FIX(0.850430095)
    44. 

  44. F_0_899	equ	 7373		; FIX(0.899976223)
    45. 

  45. F_1_061	equ	 8697		; FIX(1.061594337)
    46. 

  46. F_1_272	equ	10426		; FIX(1.272758580)
    47. 

  47. F_1_451	equ	11893		; FIX(1.451774981)
    48. 

  48. F_1_847	equ	15137		; FIX(1.847759065)
    49. 

  49. F_2_172	equ	17799		; FIX(2.172734803)
    50. 

  50. F_2_562	equ	20995		; FIX(2.562915447)
    51. 

  51. F_3_624	equ	29692		; FIX(3.624509785)
    52. 

  52. %else
    53. 

  53. ; NASM cannot do compile-time arithmetic on floating-point constants.
    54. 

  54. %define DESCALE(x,n)  (((x)+(1<<((n)-1)))>>(n))
    55. 

  55. F_0_211	equ	DESCALE( 226735879,30-CONST_BITS)	; FIX(0.211164243)
    56. 

  56. F_0_509	equ	DESCALE( 547388834,30-CONST_BITS)	; FIX(0.509795579)
    57. 

  57. F_0_601	equ	DESCALE( 645689155,30-CONST_BITS)	; FIX(0.601344887)
    58. 

  58. F_0_720	equ	DESCALE( 774124714,30-CONST_BITS)	; FIX(0.720959822)
    59. 

  59. F_0_765	equ	DESCALE( 821806413,30-CONST_BITS)	; FIX(0.765366865)
    60. 

  60. F_0_850	equ	DESCALE( 913142361,30-CONST_BITS)	; FIX(0.850430095)
    61. 

  61. F_0_899	equ	DESCALE( 966342111,30-CONST_BITS)	; FIX(0.899976223)
    62. 

  62. F_1_061	equ	DESCALE(1139878239,30-CONST_BITS)	; FIX(1.061594337)
    63. 

  63. F_1_272	equ	DESCALE(1366614119,30-CONST_BITS)	; FIX(1.272758580)
    64. 

  64. F_1_451	equ	DESCALE(1558831516,30-CONST_BITS)	; FIX(1.451774981)
    65. 

  65. F_1_847	equ	DESCALE(1984016188,30-CONST_BITS)	; FIX(1.847759065)
    66. 

  66. F_2_172	equ	DESCALE(2332956230,30-CONST_BITS)	; FIX(2.172734803)
    67. 

  67. F_2_562	equ	DESCALE(2751909506,30-CONST_BITS)	; FIX(2.562915447)
    68. 

  68. F_3_624	equ	DESCALE(3891787747,30-CONST_BITS)	; FIX(3.624509785)
    69. 

  69. %endif
    70. 

  70. 

  71. ; --------------------------------------------------------------------------
    72. 

  72. 	SECTION	SEG_CONST
    73. 

  73. 

  74. 	alignz	16
    75. 

  75. 	global	EXTN(jconst_idct_red_sse2)
    76. 

  76. 

  77. EXTN(jconst_idct_red_sse2):
    78. 

  78. 

  79. PW_F184_MF076	times 4 dw  F_1_847,-F_0_765
    80. 

  80. PW_F256_F089	times 4 dw  F_2_562, F_0_899
    81. 

  81. PW_F106_MF217	times 4 dw  F_1_061,-F_2_172
    82. 

  82. PW_MF060_MF050	times 4 dw -F_0_601,-F_0_509
    83. 

  83. PW_F145_MF021	times 4 dw  F_1_451,-F_0_211
    84. 

  84. PW_F362_MF127	times 4 dw  F_3_624,-F_1_272
    85. 

  85. PW_F085_MF072	times 4 dw  F_0_850,-F_0_720
    86. 

  86. PD_DESCALE_P1_4	times 4 dd  1 << (DESCALE_P1_4-1)
    87. 

  87. PD_DESCALE_P2_4	times 4 dd  1 << (DESCALE_P2_4-1)
    88. 

  88. PD_DESCALE_P1_2	times 4 dd  1 << (DESCALE_P1_2-1)
    89. 

  89. PD_DESCALE_P2_2	times 4 dd  1 << (DESCALE_P2_2-1)
    90. 

  90. PB_CENTERJSAMP	times 16 db CENTERJSAMPLE
    91. 

  91. 

  92. 	alignz	16
    93. 

  93. 

  94. ; --------------------------------------------------------------------------
    95. 

  95. 	SECTION	SEG_TEXT
    96. 

  96. 	BITS	32
    97. 

  97. ;
    98. 

  98. ; Perform dequantization and inverse DCT on one block of coefficients,
    99. 

  99. ; producing a reduced-size 4x4 output block.
    100. 

  100. ;
    101. 

  101. ; GLOBAL(void)
    102. 

  102. ; jsimd_idct_4x4_sse2 (void * dct_table, JCOEFPTR coef_block,
    103. 

  103. ;                      JSAMPARRAY output_buf, JDIMENSION output_col)
    104. 

  104. ;
    105. 

  105. 

  106. %define dct_table(b)	(b)+8			; void * dct_table
    107. 

  107. %define coef_block(b)	(b)+12		; JCOEFPTR coef_block
    108. 

  108. %define output_buf(b)	(b)+16		; JSAMPARRAY output_buf
    109. 

  109. %define output_col(b)	(b)+20		; JDIMENSION output_col
    110. 

  110. 

  111. %define original_ebp	ebp+0
    112. 

  112. %define wk(i)		ebp-(WK_NUM-(i))*SIZEOF_XMMWORD	; xmmword wk[WK_NUM]
    113. 

  113. %define WK_NUM		2
    114. 

  114. 

  115. 	align	16
    116. 

  116. 	global	EXTN(jsimd_idct_4x4_sse2)
    117. 

  117. 

  118. EXTN(jsimd_idct_4x4_sse2):
    119. 

  119. 	push	ebp
    120. 

  120. 	mov	eax,esp				; eax = original ebp
    121. 

  121. 	sub	esp, byte 4
    122. 

  122. 	and	esp, byte (-SIZEOF_XMMWORD)	; align to 128 bits
    123. 

  123. 	mov	[esp],eax
    124. 

  124. 	mov	ebp,esp				; ebp = aligned ebp
    125. 

  125. 	lea	esp, [wk(0)]
    126. 

  126. 	pushpic	ebx
    127. 

  127. ;	push	ecx		; unused
    128. 

  128. ;	push	edx		; need not be preserved
    129. 

  129. 	push	esi
    130. 

  130. 	push	edi
    131. 

  131. 

  132. 	get_GOT	ebx		; get GOT address
    133. 

  133. 

  134. 	; ---- Pass 1: process columns from input.
    135. 

  135. 

  136. ;	mov	eax, [original_ebp]
    137. 

  137. 	mov	edx, POINTER [dct_table(eax)]	; quantptr
    138. 

  138. 	mov	esi, JCOEFPTR [coef_block(eax)]		; inptr
    139. 

  139. 

  140. %ifndef NO_ZERO_COLUMN_TEST_4X4_SSE2
    141. 

  141. 	mov	eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
    142. 

  142. 	or	eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
    143. 

  143. 	jnz	short .columnDCT
    144. 

  144. 

  145. 	movdqa	xmm0, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)]
    146. 

  146. 	movdqa	xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_JCOEF)]
    147. 

  147. 	por	xmm0, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)]
    148. 

  148. 	por	xmm1, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)]
    149. 

  149. 	por	xmm0, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)]
    150. 

  150. 	por	xmm1, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)]
    151. 

  151. 	por	xmm0,xmm1
    152. 

  152. 	packsswb xmm0,xmm0
    153. 

  153. 	packsswb xmm0,xmm0
    154. 

  154. 	movd	eax,xmm0
    155. 

  155. 	test	eax,eax
    156. 

  156. 	jnz	short .columnDCT
    157. 

  157. 

  158. 	; -- AC terms all zero
    159. 

  159. 

  160. 	movdqa	xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)]
    161. 

  161. 	pmullw	xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
    162. 

  162. 

  163. 	psllw	xmm0,PASS1_BITS
    164. 

  164. 

  165. 	movdqa    xmm3,xmm0	; xmm0=in0=(00 01 02 03 04 05 06 07)
    166. 

  166. 	punpcklwd xmm0,xmm0	; xmm0=(00 00 01 01 02 02 03 03)
    167. 

  167. 	punpckhwd xmm3,xmm3	; xmm3=(04 04 05 05 06 06 07 07)
    168. 

  168. 

  169. 	pshufd	xmm1,xmm0,0x50	; xmm1=[col0 col1]=(00 00 00 00 01 01 01 01)
    170. 

  170. 	pshufd	xmm0,xmm0,0xFA	; xmm0=[col2 col3]=(02 02 02 02 03 03 03 03)
    171. 

  171. 	pshufd	xmm6,xmm3,0x50	; xmm6=[col4 col5]=(04 04 04 04 05 05 05 05)
    172. 

  172. 	pshufd	xmm3,xmm3,0xFA	; xmm3=[col6 col7]=(06 06 06 06 07 07 07 07)
    173. 

  173. 

  174. 	jmp	near .column_end
    175. 

  175. 	alignx	16,7
    176. 

  176. %endif
    177. 

  177. .columnDCT:
    178. 

  178. 

  179. 	; -- Odd part
    180. 

  180. 

  181. 	movdqa	xmm0, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)]
    182. 

  182. 	movdqa	xmm1, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)]
    183. 

  183. 	pmullw	xmm0, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
    184. 

  184. 	pmullw	xmm1, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
    185. 

  185. 	movdqa	xmm2, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)]
    186. 

  186. 	movdqa	xmm3, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)]
    187. 

  187. 	pmullw	xmm2, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
    188. 

  188. 	pmullw	xmm3, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
    189. 

  189. 

  190. 	movdqa    xmm4,xmm0
    191. 

  191. 	movdqa    xmm5,xmm0
    192. 

  192. 	punpcklwd xmm4,xmm1
    193. 

  193. 	punpckhwd xmm5,xmm1
    194. 

  194. 	movdqa    xmm0,xmm4
    195. 

  195. 	movdqa    xmm1,xmm5
    196. 

  196. 	pmaddwd   xmm4,[GOTOFF(ebx,PW_F256_F089)]	; xmm4=(tmp2L)
    197. 

  197. 	pmaddwd   xmm5,[GOTOFF(ebx,PW_F256_F089)]	; xmm5=(tmp2H)
    198. 

  198. 	pmaddwd   xmm0,[GOTOFF(ebx,PW_F106_MF217)]	; xmm0=(tmp0L)
    199. 

  199. 	pmaddwd   xmm1,[GOTOFF(ebx,PW_F106_MF217)]	; xmm1=(tmp0H)
    200. 

  200. 

  201. 	movdqa    xmm6,xmm2
    202. 

  202. 	movdqa    xmm7,xmm2
    203. 

  203. 	punpcklwd xmm6,xmm3
    204. 

  204. 	punpckhwd xmm7,xmm3
    205. 

  205. 	movdqa    xmm2,xmm6
    206. 

  206. 	movdqa    xmm3,xmm7
    207. 

  207. 	pmaddwd   xmm6,[GOTOFF(ebx,PW_MF060_MF050)]	; xmm6=(tmp2L)
    208. 

  208. 	pmaddwd   xmm7,[GOTOFF(ebx,PW_MF060_MF050)]	; xmm7=(tmp2H)
    209. 

  209. 	pmaddwd   xmm2,[GOTOFF(ebx,PW_F145_MF021)]	; xmm2=(tmp0L)
    210. 

  210. 	pmaddwd   xmm3,[GOTOFF(ebx,PW_F145_MF021)]	; xmm3=(tmp0H)
    211. 

  211. 

  212. 	paddd	xmm6,xmm4		; xmm6=tmp2L
    213. 

  213. 	paddd	xmm7,xmm5		; xmm7=tmp2H
    214. 

  214. 	paddd	xmm2,xmm0		; xmm2=tmp0L
    215. 

  215. 	paddd	xmm3,xmm1		; xmm3=tmp0H
    216. 

  216. 

  217. 	movdqa	XMMWORD [wk(0)], xmm2	; wk(0)=tmp0L
    218. 

  218. 	movdqa	XMMWORD [wk(1)], xmm3	; wk(1)=tmp0H
    219. 

  219. 

  220. 	; -- Even part
    221. 

  221. 

  222. 	movdqa	xmm4, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)]
    223. 

  223. 	movdqa	xmm5, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_JCOEF)]
    224. 

  224. 	movdqa	xmm0, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)]
    225. 

  225. 	pmullw	xmm4, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
    226. 

  226. 	pmullw	xmm5, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
    227. 

  227. 	pmullw	xmm0, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
    228. 

  228. 

  229. 	pxor      xmm1,xmm1
    230. 

  230. 	pxor      xmm2,xmm2
    231. 

  231. 	punpcklwd xmm1,xmm4		; xmm1=tmp0L
    232. 

  232. 	punpckhwd xmm2,xmm4		; xmm2=tmp0H
    233. 

  233. 	psrad     xmm1,(16-CONST_BITS-1) ; psrad xmm1,16 & pslld xmm1,CONST_BITS+1
    234. 

  234. 	psrad     xmm2,(16-CONST_BITS-1) ; psrad xmm2,16 & pslld xmm2,CONST_BITS+1
    235. 

  235. 

  236. 	movdqa    xmm3,xmm5		; xmm5=in2=z2
    237. 

  237. 	punpcklwd xmm5,xmm0		; xmm0=in6=z3
    238. 

  238. 	punpckhwd xmm3,xmm0
    239. 

  239. 	pmaddwd   xmm5,[GOTOFF(ebx,PW_F184_MF076)]	; xmm5=tmp2L
    240. 

  240. 	pmaddwd   xmm3,[GOTOFF(ebx,PW_F184_MF076)]	; xmm3=tmp2H
    241. 

  241. 

  242. 	movdqa	xmm4,xmm1
    243. 

  243. 	movdqa	xmm0,xmm2
    244. 

  244. 	paddd	xmm1,xmm5		; xmm1=tmp10L
    245. 

  245. 	paddd	xmm2,xmm3		; xmm2=tmp10H
    246. 

  246. 	psubd	xmm4,xmm5		; xmm4=tmp12L
    247. 

  247. 	psubd	xmm0,xmm3		; xmm0=tmp12H
    248. 

  248. 

  249. 	; -- Final output stage
    250. 

  250. 

  251. 	movdqa	xmm5,xmm1
    252. 

  252. 	movdqa	xmm3,xmm2
    253. 

  253. 	paddd	xmm1,xmm6		; xmm1=data0L
    254. 

  254. 	paddd	xmm2,xmm7		; xmm2=data0H
    255. 

  255. 	psubd	xmm5,xmm6		; xmm5=data3L
    256. 

  256. 	psubd	xmm3,xmm7		; xmm3=data3H
    257. 

  257. 

  258. 	movdqa	xmm6,[GOTOFF(ebx,PD_DESCALE_P1_4)]	; xmm6=[PD_DESCALE_P1_4]
    259. 

  259. 

  260. 	paddd	xmm1,xmm6
    261. 

  261. 	paddd	xmm2,xmm6
    262. 

  262. 	psrad	xmm1,DESCALE_P1_4
    263. 

  263. 	psrad	xmm2,DESCALE_P1_4
    264. 

  264. 	paddd	xmm5,xmm6
    265. 

  265. 	paddd	xmm3,xmm6
    266. 

  266. 	psrad	xmm5,DESCALE_P1_4
    267. 

  267. 	psrad	xmm3,DESCALE_P1_4
    268. 

  268. 

  269. 	packssdw  xmm1,xmm2		; xmm1=data0=(00 01 02 03 04 05 06 07)
    270. 

  270. 	packssdw  xmm5,xmm3		; xmm5=data3=(30 31 32 33 34 35 36 37)
    271. 

  271. 

  272. 	movdqa	xmm7, XMMWORD [wk(0)]	; xmm7=tmp0L
    273. 

  273. 	movdqa	xmm6, XMMWORD [wk(1)]	; xmm6=tmp0H
    274. 

  274. 

  275. 	movdqa	xmm2,xmm4
    276. 

  276. 	movdqa	xmm3,xmm0
    277. 

  277. 	paddd	xmm4,xmm7		; xmm4=data1L
    278. 

  278. 	paddd	xmm0,xmm6		; xmm0=data1H
    279. 

  279. 	psubd	xmm2,xmm7		; xmm2=data2L
    280. 

  280. 	psubd	xmm3,xmm6		; xmm3=data2H
    281. 

  281. 

  282. 	movdqa	xmm7,[GOTOFF(ebx,PD_DESCALE_P1_4)]	; xmm7=[PD_DESCALE_P1_4]
    283. 

  283. 

  284. 	paddd	xmm4,xmm7
    285. 

  285. 	paddd	xmm0,xmm7
    286. 

  286. 	psrad	xmm4,DESCALE_P1_4
    287. 

  287. 	psrad	xmm0,DESCALE_P1_4
    288. 

  288. 	paddd	xmm2,xmm7
    289. 

  289. 	paddd	xmm3,xmm7
    290. 

  290. 	psrad	xmm2,DESCALE_P1_4
    291. 

  291. 	psrad	xmm3,DESCALE_P1_4
    292. 

  292. 

  293. 	packssdw  xmm4,xmm0		; xmm4=data1=(10 11 12 13 14 15 16 17)
    294. 

  294. 	packssdw  xmm2,xmm3		; xmm2=data2=(20 21 22 23 24 25 26 27)
    295. 

  295. 

  296. 	movdqa    xmm6,xmm1	; transpose coefficients(phase 1)
    297. 

  297. 	punpcklwd xmm1,xmm4	; xmm1=(00 10 01 11 02 12 03 13)
    298. 

  298. 	punpckhwd xmm6,xmm4	; xmm6=(04 14 05 15 06 16 07 17)
    299. 

  299. 	movdqa    xmm7,xmm2	; transpose coefficients(phase 1)
    300. 

  300. 	punpcklwd xmm2,xmm5	; xmm2=(20 30 21 31 22 32 23 33)
    301. 

  301. 	punpckhwd xmm7,xmm5	; xmm7=(24 34 25 35 26 36 27 37)
    302. 

  302. 

  303. 	movdqa    xmm0,xmm1	; transpose coefficients(phase 2)
    304. 

  304. 	punpckldq xmm1,xmm2	; xmm1=[col0 col1]=(00 10 20 30 01 11 21 31)
    305. 

  305. 	punpckhdq xmm0,xmm2	; xmm0=[col2 col3]=(02 12 22 32 03 13 23 33)
    306. 

  306. 	movdqa    xmm3,xmm6	; transpose coefficients(phase 2)
    307. 

  307. 	punpckldq xmm6,xmm7	; xmm6=[col4 col5]=(04 14 24 34 05 15 25 35)
    308. 

  308. 	punpckhdq xmm3,xmm7	; xmm3=[col6 col7]=(06 16 26 36 07 17 27 37)
    309. 

  309. .column_end:
    310. 

  310. 

  311. 	; -- Prefetch the next coefficient block
    312. 

  312. 

  313. 	prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 0*32]
    314. 

  314. 	prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 1*32]
    315. 

  315. 	prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 2*32]
    316. 

  316. 	prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 3*32]
    317. 

  317. 

  318. 	; ---- Pass 2: process rows, store into output array.
    319. 

  319. 

  320. 	mov	eax, [original_ebp]
    321. 

  321. 	mov	edi, JSAMPARRAY [output_buf(eax)]	; (JSAMPROW *)
    322. 

  322. 	mov	eax, JDIMENSION [output_col(eax)]
    323. 

  323. 

  324. 	; -- Even part
    325. 

  325. 

  326. 	pxor      xmm4,xmm4
    327. 

  327. 	punpcklwd xmm4,xmm1		; xmm4=tmp0
    328. 

  328. 	psrad     xmm4,(16-CONST_BITS-1) ; psrad xmm4,16 & pslld xmm4,CONST_BITS+1
    329. 

  329. 

  330. 	; -- Odd part
    331. 

  331. 

  332. 	punpckhwd xmm1,xmm0
    333. 

  333. 	punpckhwd xmm6,xmm3
    334. 

  334. 	movdqa    xmm5,xmm1
    335. 

  335. 	movdqa    xmm2,xmm6
    336. 

  336. 	pmaddwd   xmm1,[GOTOFF(ebx,PW_F256_F089)]	; xmm1=(tmp2)
    337. 

  337. 	pmaddwd   xmm6,[GOTOFF(ebx,PW_MF060_MF050)]	; xmm6=(tmp2)
    338. 

  338. 	pmaddwd   xmm5,[GOTOFF(ebx,PW_F106_MF217)]	; xmm5=(tmp0)
    339. 

  339. 	pmaddwd   xmm2,[GOTOFF(ebx,PW_F145_MF021)]	; xmm2=(tmp0)
    340. 

  340. 

  341. 	paddd     xmm6,xmm1		; xmm6=tmp2
    342. 

  342. 	paddd     xmm2,xmm5		; xmm2=tmp0
    343. 

  343. 

  344. 	; -- Even part
    345. 

  345. 

  346. 	punpcklwd xmm0,xmm3
    347. 

  347. 	pmaddwd   xmm0,[GOTOFF(ebx,PW_F184_MF076)]	; xmm0=tmp2
    348. 

  348. 

  349. 	movdqa    xmm7,xmm4
    350. 

  350. 	paddd     xmm4,xmm0		; xmm4=tmp10
    351. 

  351. 	psubd     xmm7,xmm0		; xmm7=tmp12
    352. 

  352. 

  353. 	; -- Final output stage
    354. 

  354. 

  355. 	movdqa	xmm1,[GOTOFF(ebx,PD_DESCALE_P2_4)]	; xmm1=[PD_DESCALE_P2_4]
    356. 

  356. 

  357. 	movdqa	xmm5,xmm4
    358. 

  358. 	movdqa	xmm3,xmm7
    359. 

  359. 	paddd	xmm4,xmm6		; xmm4=data0=(00 10 20 30)
    360. 

  360. 	paddd	xmm7,xmm2		; xmm7=data1=(01 11 21 31)
    361. 

  361. 	psubd	xmm5,xmm6		; xmm5=data3=(03 13 23 33)
    362. 

  362. 	psubd	xmm3,xmm2		; xmm3=data2=(02 12 22 32)
    363. 

  363. 

  364. 	paddd	xmm4,xmm1
    365. 

  365. 	paddd	xmm7,xmm1
    366. 

  366. 	psrad	xmm4,DESCALE_P2_4
    367. 

  367. 	psrad	xmm7,DESCALE_P2_4
    368. 

  368. 	paddd	xmm5,xmm1
    369. 

  369. 	paddd	xmm3,xmm1
    370. 

  370. 	psrad	xmm5,DESCALE_P2_4
    371. 

  371. 	psrad	xmm3,DESCALE_P2_4
    372. 

  372. 

  373. 	packssdw  xmm4,xmm3		; xmm4=(00 10 20 30 02 12 22 32)
    374. 

  374. 	packssdw  xmm7,xmm5		; xmm7=(01 11 21 31 03 13 23 33)
    375. 

  375. 

  376. 	movdqa    xmm0,xmm4		; transpose coefficients(phase 1)
    377. 

  377. 	punpcklwd xmm4,xmm7		; xmm4=(00 01 10 11 20 21 30 31)
    378. 

  378. 	punpckhwd xmm0,xmm7		; xmm0=(02 03 12 13 22 23 32 33)
    379. 

  379. 

  380. 	movdqa    xmm6,xmm4		; transpose coefficients(phase 2)
    381. 

  381. 	punpckldq xmm4,xmm0		; xmm4=(00 01 02 03 10 11 12 13)
    382. 

  382. 	punpckhdq xmm6,xmm0		; xmm6=(20 21 22 23 30 31 32 33)
    383. 

  383. 

  384. 	packsswb  xmm4,xmm6		; xmm4=(00 01 02 03 10 11 12 13 20 ..)
    385. 

  385. 	paddb     xmm4,[GOTOFF(ebx,PB_CENTERJSAMP)]
    386. 

  386. 

  387. 	pshufd    xmm2,xmm4,0x39	; xmm2=(10 11 12 13 20 21 22 23 30 ..)
    388. 

  388. 	pshufd    xmm1,xmm4,0x4E	; xmm1=(20 21 22 23 30 31 32 33 00 ..)
    389. 

  389. 	pshufd    xmm3,xmm4,0x93	; xmm3=(30 31 32 33 00 01 02 03 10 ..)
    390. 

  390. 

  391. 	mov	edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
    392. 

  392. 	mov	esi, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
    393. 

  393. 	movd	XMM_DWORD [edx+eax*SIZEOF_JSAMPLE], xmm4
    394. 

  394. 	movd	XMM_DWORD [esi+eax*SIZEOF_JSAMPLE], xmm2
    395. 

  395. 	mov	edx, JSAMPROW [edi+2*SIZEOF_JSAMPROW]
    396. 

  396. 	mov	esi, JSAMPROW [edi+3*SIZEOF_JSAMPROW]
    397. 

  397. 	movd	XMM_DWORD [edx+eax*SIZEOF_JSAMPLE], xmm1
    398. 

  398. 	movd	XMM_DWORD [esi+eax*SIZEOF_JSAMPLE], xmm3
    399. 

  399. 

  400. 	pop	edi
    401. 

  401. 	pop	esi
    402. 

  402. ;	pop	edx		; need not be preserved
    403. 

  403. ;	pop	ecx		; unused
    404. 

  404. 	poppic	ebx
    405. 

  405. 	mov	esp,ebp		; esp <- aligned ebp
    406. 

  406. 	pop	esp		; esp <- original ebp
    407. 

  407. 	pop	ebp
    408. 

  408. 	ret
    409. 

  409. 

  410. 

  411. ; --------------------------------------------------------------------------
    412. 

  412. ;
    413. 

  413. ; Perform dequantization and inverse DCT on one block of coefficients,
    414. 

  414. ; producing a reduced-size 2x2 output block.
    415. 

  415. ;
    416. 

  416. ; GLOBAL(void)
    417. 

  417. ; jsimd_idct_2x2_sse2 (void * dct_table, JCOEFPTR coef_block,
    418. 

  418. ;                      JSAMPARRAY output_buf, JDIMENSION output_col)
    419. 

  419. ;
    420. 

  420. 

  421. %define dct_table(b)	(b)+8			; void * dct_table
    422. 

  422. %define coef_block(b)	(b)+12		; JCOEFPTR coef_block
    423. 

  423. %define output_buf(b)	(b)+16		; JSAMPARRAY output_buf
    424. 

  424. %define output_col(b)	(b)+20		; JDIMENSION output_col
    425. 

  425. 

  426. 	align	16
    427. 

  427. 	global	EXTN(jsimd_idct_2x2_sse2)
    428. 

  428. 

  429. EXTN(jsimd_idct_2x2_sse2):
    430. 

  430. 	push	ebp
    431. 

  431. 	mov	ebp,esp
    432. 

  432. 	push	ebx
    433. 

  433. ;	push	ecx		; need not be preserved
    434. 

  434. ;	push	edx		; need not be preserved
    435. 

  435. 	push	esi
    436. 

  436. 	push	edi
    437. 

  437. 

  438. 	get_GOT	ebx		; get GOT address
    439. 

  439. 

  440. 	; ---- Pass 1: process columns from input.
    441. 

  441. 

  442. 	mov	edx, POINTER [dct_table(ebp)]	; quantptr
    443. 

  443. 	mov	esi, JCOEFPTR [coef_block(ebp)]		; inptr
    444. 

  444. 

  445. 	; | input:                  | result:        |
    446. 

  446. 	; | 00 01 ** 03 ** 05 ** 07 |                |
    447. 

  447. 	; | 10 11 ** 13 ** 15 ** 17 |                |
    448. 

  448. 	; | ** ** ** ** ** ** ** ** |                |
    449. 

  449. 	; | 30 31 ** 33 ** 35 ** 37 | A0 A1 A3 A5 A7 |
    450. 

  450. 	; | ** ** ** ** ** ** ** ** | B0 B1 B3 B5 B7 |
    451. 

  451. 	; | 50 51 ** 53 ** 55 ** 57 |                |
    452. 

  452. 	; | ** ** ** ** ** ** ** ** |                |
    453. 

  453. 	; | 70 71 ** 73 ** 75 ** 77 |                |
    454. 

  454. 

  455. 	; -- Odd part
    456. 

  456. 

  457. 	movdqa	xmm0, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)]
    458. 

  458. 	movdqa	xmm1, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)]
    459. 

  459. 	pmullw	xmm0, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
    460. 

  460. 	pmullw	xmm1, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
    461. 

  461. 	movdqa	xmm2, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)]
    462. 

  462. 	movdqa	xmm3, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)]
    463. 

  463. 	pmullw	xmm2, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
    464. 

  464. 	pmullw	xmm3, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
    465. 

  465. 

  466. 	; xmm0=(10 11 ** 13 ** 15 ** 17), xmm1=(30 31 ** 33 ** 35 ** 37)
    467. 

  467. 	; xmm2=(50 51 ** 53 ** 55 ** 57), xmm3=(70 71 ** 73 ** 75 ** 77)
    468. 

  468. 

  469. 	pcmpeqd   xmm7,xmm7
    470. 

  470. 	pslld     xmm7,WORD_BIT		; xmm7={0x0000 0xFFFF 0x0000 0xFFFF ..}
    471. 

  471. 

  472. 	movdqa    xmm4,xmm0		; xmm4=(10 11 ** 13 ** 15 ** 17)
    473. 

  473. 	movdqa    xmm5,xmm2		; xmm5=(50 51 ** 53 ** 55 ** 57)
    474. 

  474. 	punpcklwd xmm4,xmm1		; xmm4=(10 30 11 31 ** ** 13 33)
    475. 

  475. 	punpcklwd xmm5,xmm3		; xmm5=(50 70 51 71 ** ** 53 73)
    476. 

  476. 	pmaddwd   xmm4,[GOTOFF(ebx,PW_F362_MF127)]
    477. 

  477. 	pmaddwd   xmm5,[GOTOFF(ebx,PW_F085_MF072)]
    478. 

  478. 

  479. 	psrld	xmm0,WORD_BIT		; xmm0=(11 -- 13 -- 15 -- 17 --)
    480. 

  480. 	pand	xmm1,xmm7		; xmm1=(-- 31 -- 33 -- 35 -- 37)
    481. 

  481. 	psrld	xmm2,WORD_BIT		; xmm2=(51 -- 53 -- 55 -- 57 --)
    482. 

  482. 	pand	xmm3,xmm7		; xmm3=(-- 71 -- 73 -- 75 -- 77)
    483. 

  483. 	por	xmm0,xmm1		; xmm0=(11 31 13 33 15 35 17 37)
    484. 

  484. 	por	xmm2,xmm3		; xmm2=(51 71 53 73 55 75 57 77)
    485. 

  485. 	pmaddwd	xmm0,[GOTOFF(ebx,PW_F362_MF127)]
    486. 

  486. 	pmaddwd	xmm2,[GOTOFF(ebx,PW_F085_MF072)]
    487. 

  487. 

  488. 	paddd	xmm4,xmm5		; xmm4=tmp0[col0 col1 **** col3]
    489. 

  489. 	paddd	xmm0,xmm2		; xmm0=tmp0[col1 col3 col5 col7]
    490. 

  490. 

  491. 	; -- Even part
    492. 

  492. 

  493. 	movdqa	xmm6, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)]
    494. 

  494. 	pmullw	xmm6, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
    495. 

  495. 

  496. 	; xmm6=(00 01 ** 03 ** 05 ** 07)
    497. 

  497. 

  498. 	movdqa	xmm1,xmm6		; xmm1=(00 01 ** 03 ** 05 ** 07)
    499. 

  499. 	pslld	xmm6,WORD_BIT		; xmm6=(-- 00 -- ** -- ** -- **)
    500. 

  500. 	pand	xmm1,xmm7		; xmm1=(-- 01 -- 03 -- 05 -- 07)
    501. 

  501. 	psrad	xmm6,(WORD_BIT-CONST_BITS-2) ; xmm6=tmp10[col0 **** **** ****]
    502. 

  502. 	psrad	xmm1,(WORD_BIT-CONST_BITS-2) ; xmm1=tmp10[col1 col3 col5 col7]
    503. 

  503. 

  504. 	; -- Final output stage
    505. 

  505. 

  506. 	movdqa	xmm3,xmm6
    507. 

  507. 	movdqa	xmm5,xmm1
    508. 

  508. 	paddd	xmm6,xmm4	; xmm6=data0[col0 **** **** ****]=(A0 ** ** **)
    509. 

  509. 	paddd	xmm1,xmm0	; xmm1=data0[col1 col3 col5 col7]=(A1 A3 A5 A7)
    510. 

  510. 	psubd	xmm3,xmm4	; xmm3=data1[col0 **** **** ****]=(B0 ** ** **)
    511. 

  511. 	psubd	xmm5,xmm0	; xmm5=data1[col1 col3 col5 col7]=(B1 B3 B5 B7)
    512. 

  512. 

  513. 	movdqa	xmm2,[GOTOFF(ebx,PD_DESCALE_P1_2)]	; xmm2=[PD_DESCALE_P1_2]
    514. 

  514. 

  515. 	punpckldq  xmm6,xmm3		; xmm6=(A0 B0 ** **)
    516. 

  516. 

  517. 	movdqa     xmm7,xmm1
    518. 

  518. 	punpcklqdq xmm1,xmm5		; xmm1=(A1 A3 B1 B3)
    519. 

  519. 	punpckhqdq xmm7,xmm5		; xmm7=(A5 A7 B5 B7)
    520. 

  520. 

  521. 	paddd	xmm6,xmm2
    522. 

  522. 	psrad	xmm6,DESCALE_P1_2
    523. 

  523. 

  524. 	paddd	xmm1,xmm2
    525. 

  525. 	paddd	xmm7,xmm2
    526. 

  526. 	psrad	xmm1,DESCALE_P1_2
    527. 

  527. 	psrad	xmm7,DESCALE_P1_2
    528. 

  528. 

  529. 	; -- Prefetch the next coefficient block
    530. 

  530. 

  531. 	prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 0*32]
    532. 

  532. 	prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 1*32]
    533. 

  533. 	prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 2*32]
    534. 

  534. 	prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 3*32]
    535. 

  535. 

  536. 	; ---- Pass 2: process rows, store into output array.
    537. 

  537. 

  538. 	mov	edi, JSAMPARRAY [output_buf(ebp)]	; (JSAMPROW *)
    539. 

  539. 	mov	eax, JDIMENSION [output_col(ebp)]
    540. 

  540. 

  541. 	; | input:| result:|
    542. 

  542. 	; | A0 B0 |        |
    543. 

  543. 	; | A1 B1 | C0 C1  |
    544. 

  544. 	; | A3 B3 | D0 D1  |
    545. 

  545. 	; | A5 B5 |        |
    546. 

  546. 	; | A7 B7 |        |
    547. 

  547. 

  548. 	; -- Odd part
    549. 

  549. 

  550. 	packssdw  xmm1,xmm1		; xmm1=(A1 A3 B1 B3 A1 A3 B1 B3)
    551. 

  551. 	packssdw  xmm7,xmm7		; xmm7=(A5 A7 B5 B7 A5 A7 B5 B7)
    552. 

  552. 	pmaddwd   xmm1,[GOTOFF(ebx,PW_F362_MF127)]
    553. 

  553. 	pmaddwd   xmm7,[GOTOFF(ebx,PW_F085_MF072)]
    554. 

  554. 

  555. 	paddd     xmm1,xmm7		; xmm1=tmp0[row0 row1 row0 row1]
    556. 

  556. 

  557. 	; -- Even part
    558. 

  558. 

  559. 	pslld     xmm6,(CONST_BITS+2)	; xmm6=tmp10[row0 row1 **** ****]
    560. 

  560. 

  561. 	; -- Final output stage
    562. 

  562. 

  563. 	movdqa    xmm4,xmm6
    564. 

  564. 	paddd     xmm6,xmm1	; xmm6=data0[row0 row1 **** ****]=(C0 C1 ** **)
    565. 

  565. 	psubd     xmm4,xmm1	; xmm4=data1[row0 row1 **** ****]=(D0 D1 ** **)
    566. 

  566. 

  567. 	punpckldq xmm6,xmm4	; xmm6=(C0 D0 C1 D1)
    568. 

  568. 

  569. 	paddd     xmm6,[GOTOFF(ebx,PD_DESCALE_P2_2)]
    570. 

  570. 	psrad     xmm6,DESCALE_P2_2
    571. 

  571. 

  572. 	packssdw  xmm6,xmm6		; xmm6=(C0 D0 C1 D1 C0 D0 C1 D1)
    573. 

  573. 	packsswb  xmm6,xmm6		; xmm6=(C0 D0 C1 D1 C0 D0 C1 D1 ..)
    574. 

  574. 	paddb     xmm6,[GOTOFF(ebx,PB_CENTERJSAMP)]
    575. 

  575. 

  576. 	pextrw	ebx,xmm6,0x00		; ebx=(C0 D0 -- --)
    577. 

  577. 	pextrw	ecx,xmm6,0x01		; ecx=(C1 D1 -- --)
    578. 

  578. 

  579. 	mov	edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
    580. 

  580. 	mov	esi, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
    581. 

  581. 	mov	WORD [edx+eax*SIZEOF_JSAMPLE], bx
    582. 

  582. 	mov	WORD [esi+eax*SIZEOF_JSAMPLE], cx
    583. 

  583. 

  584. 	pop	edi
    585. 

  585. 	pop	esi
    586. 

  586. ;	pop	edx		; need not be preserved
    587. 

  587. ;	pop	ecx		; need not be preserved
    588. 

  588. 	pop	ebx
    589. 

  589. 	pop	ebp
    590. 

  590. 	ret
    591. 

  591. 

  592. ; For some reason, the OS X linker does not honor the request to align the
    593. 

  593. ; segment unless we do this.
    594. 

  594. 	align	16
    595.