/media/libjpeg/simd/jiss2fst-64.asm

http://github.com/zpao/v8monkey · Assembly · 492 lines · 332 code · 90 blank · 70 comment · 2 complexity · f85348298dfa0341865dff2d9a0cc489 MD5 · raw file 

    

  1. ;
    2. 

  2. ; jiss2fst-64.asm - fast integer IDCT (64-bit SSE2)
    3. 

  3. ;
    4. 

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

  5. ; Copyright 2009 D. R. Commander
    6. 

  6. ;
    7. 

  7. ; Based on
    8. 

  8. ; x86 SIMD extension for IJG JPEG library
    9. 

  9. ; Copyright (C) 1999-2006, MIYASAKA Masaru.
    10. 

  10. ; For conditions of distribution and use, see copyright notice in jsimdext.inc
    11. 

  11. ;
    12. 

  12. ; This file should be assembled with NASM (Netwide Assembler),
    13. 

  13. ; can *not* be assembled with Microsoft's MASM or any compatible
    14. 

  14. ; assembler (including Borland's Turbo Assembler).
    15. 

  15. ; NASM is available from http://nasm.sourceforge.net/ or
    16. 

  16. ; http://sourceforge.net/projecpt/showfiles.php?group_id=6208
    17. 

  17. ;
    18. 

  18. ; This file contains a fast, not so accurate integer implementation of
    19. 

  19. ; the inverse DCT (Discrete Cosine Transform). The following code is
    20. 

  20. ; based directly on the IJG's original jidctfst.c; see the jidctfst.c
    21. 

  21. ; for more details.
    22. 

  22. ;
    23. 

  23. ; [TAB8]
    24. 

  24. 

  25. %include "jsimdext.inc"
    26. 

  26. %include "jdct.inc"
    27. 

  27. 

  28. ; --------------------------------------------------------------------------
    29. 

  29. 

  30. %define CONST_BITS	8	; 14 is also OK.
    31. 

  31. %define PASS1_BITS	2
    32. 

  32. 

  33. %if IFAST_SCALE_BITS != PASS1_BITS
    34. 

  34. %error "'IFAST_SCALE_BITS' must be equal to 'PASS1_BITS'."
    35. 

  35. %endif
    36. 

  36. 

  37. %if CONST_BITS == 8
    38. 

  38. F_1_082	equ	277		; FIX(1.082392200)
    39. 

  39. F_1_414	equ	362		; FIX(1.414213562)
    40. 

  40. F_1_847	equ	473		; FIX(1.847759065)
    41. 

  41. F_2_613	equ	669		; FIX(2.613125930)
    42. 

  42. F_1_613	equ	(F_2_613 - 256)	; FIX(2.613125930) - FIX(1)
    43. 

  43. %else
    44. 

  44. ; NASM cannot do compile-time arithmetic on floating-point constants.
    45. 

  45. %define	DESCALE(x,n)  (((x)+(1<<((n)-1)))>>(n))
    46. 

  46. F_1_082	equ	DESCALE(1162209775,30-CONST_BITS)	; FIX(1.082392200)
    47. 

  47. F_1_414	equ	DESCALE(1518500249,30-CONST_BITS)	; FIX(1.414213562)
    48. 

  48. F_1_847	equ	DESCALE(1984016188,30-CONST_BITS)	; FIX(1.847759065)
    49. 

  49. F_2_613	equ	DESCALE(2805822602,30-CONST_BITS)	; FIX(2.613125930)
    50. 

  50. F_1_613	equ	(F_2_613 - (1 << CONST_BITS))	; FIX(2.613125930) - FIX(1)
    51. 

  51. %endif
    52. 

  52. 

  53. ; --------------------------------------------------------------------------
    54. 

  54. 	SECTION	SEG_CONST
    55. 

  55. 

  56. ; PRE_MULTIPLY_SCALE_BITS <= 2 (to avoid overflow)
    57. 

  57. ; CONST_BITS + CONST_SHIFT + PRE_MULTIPLY_SCALE_BITS == 16 (for pmulhw)
    58. 

  58. 

  59. %define PRE_MULTIPLY_SCALE_BITS   2
    60. 

  60. %define CONST_SHIFT     (16 - PRE_MULTIPLY_SCALE_BITS - CONST_BITS)
    61. 

  61. 

  62. 	alignz	16
    63. 

  63. 	global	EXTN(jconst_idct_ifast_sse2)
    64. 

  64. 

  65. EXTN(jconst_idct_ifast_sse2):
    66. 

  66. 

  67. PW_F1414	times 8 dw  F_1_414 << CONST_SHIFT
    68. 

  68. PW_F1847	times 8 dw  F_1_847 << CONST_SHIFT
    69. 

  69. PW_MF1613	times 8 dw -F_1_613 << CONST_SHIFT
    70. 

  70. PW_F1082	times 8 dw  F_1_082 << CONST_SHIFT
    71. 

  71. PB_CENTERJSAMP	times 16 db CENTERJSAMPLE
    72. 

  72. 

  73. 	alignz	16
    74. 

  74. 

  75. ; --------------------------------------------------------------------------
    76. 

  76. 	SECTION	SEG_TEXT
    77. 

  77. 	BITS	64
    78. 

  78. ;
    79. 

  79. ; Perform dequantization and inverse DCT on one block of coefficients.
    80. 

  80. ;
    81. 

  81. ; GLOBAL(void)
    82. 

  82. ; jsimd_idct_ifast_sse2 (void * dct_table, JCOEFPTR coef_block,
    83. 

  83. ;                       JSAMPARRAY output_buf, JDIMENSION output_col)
    84. 

  84. ;
    85. 

  85. 

  86. ; r10 = jpeg_component_info * compptr
    87. 

  87. ; r11 = JCOEFPTR coef_block
    88. 

  88. ; r12 = JSAMPARRAY output_buf
    89. 

  89. ; r13 = JDIMENSION output_col
    90. 

  90. 

  91. %define original_rbp	rbp+0
    92. 

  92. %define wk(i)		rbp-(WK_NUM-(i))*SIZEOF_XMMWORD	; xmmword wk[WK_NUM]
    93. 

  93. %define WK_NUM		2
    94. 

  94. 

  95. 	align	16
    96. 

  96. 	global	EXTN(jsimd_idct_ifast_sse2)
    97. 

  97. 

  98. EXTN(jsimd_idct_ifast_sse2):
    99. 

  99. 	push	rbp
    100. 

  100. 	mov	rax,rsp				; rax = original rbp
    101. 

  101. 	sub	rsp, byte 4
    102. 

  102. 	and	rsp, byte (-SIZEOF_XMMWORD)	; align to 128 bits
    103. 

  103. 	mov	[rsp],rax
    104. 

  104. 	mov	rbp,rsp				; rbp = aligned rbp
    105. 

  105. 	lea	rsp, [wk(0)]
    106. 

  106. 	collect_args
    107. 

  107. 

  108. 	; ---- Pass 1: process columns from input.
    109. 

  109. 

  110. 	mov	rdx, r10	; quantptr
    111. 

  111. 	mov	rsi, r11		; inptr
    112. 

  112. 

  113. %ifndef NO_ZERO_COLUMN_TEST_IFAST_SSE2
    114. 

  114. 	mov	eax, DWORD [DWBLOCK(1,0,rsi,SIZEOF_JCOEF)]
    115. 

  115. 	or	eax, DWORD [DWBLOCK(2,0,rsi,SIZEOF_JCOEF)]
    116. 

  116. 	jnz	near .columnDCT
    117. 

  117. 

  118. 	movdqa	xmm0, XMMWORD [XMMBLOCK(1,0,rsi,SIZEOF_JCOEF)]
    119. 

  119. 	movdqa	xmm1, XMMWORD [XMMBLOCK(2,0,rsi,SIZEOF_JCOEF)]
    120. 

  120. 	por	xmm0, XMMWORD [XMMBLOCK(3,0,rsi,SIZEOF_JCOEF)]
    121. 

  121. 	por	xmm1, XMMWORD [XMMBLOCK(4,0,rsi,SIZEOF_JCOEF)]
    122. 

  122. 	por	xmm0, XMMWORD [XMMBLOCK(5,0,rsi,SIZEOF_JCOEF)]
    123. 

  123. 	por	xmm1, XMMWORD [XMMBLOCK(6,0,rsi,SIZEOF_JCOEF)]
    124. 

  124. 	por	xmm0, XMMWORD [XMMBLOCK(7,0,rsi,SIZEOF_JCOEF)]
    125. 

  125. 	por	xmm1,xmm0
    126. 

  126. 	packsswb xmm1,xmm1
    127. 

  127. 	packsswb xmm1,xmm1
    128. 

  128. 	movd	eax,xmm1
    129. 

  129. 	test	rax,rax
    130. 

  130. 	jnz	short .columnDCT
    131. 

  131. 

  132. 	; -- AC terms all zero
    133. 

  133. 

  134. 	movdqa	xmm0, XMMWORD [XMMBLOCK(0,0,rsi,SIZEOF_JCOEF)]
    135. 

  135. 	pmullw	xmm0, XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_ISLOW_MULT_TYPE)]
    136. 

  136. 

  137. 	movdqa    xmm7,xmm0		; xmm0=in0=(00 01 02 03 04 05 06 07)
    138. 

  138. 	punpcklwd xmm0,xmm0		; xmm0=(00 00 01 01 02 02 03 03)
    139. 

  139. 	punpckhwd xmm7,xmm7		; xmm7=(04 04 05 05 06 06 07 07)
    140. 

  140. 

  141. 	pshufd	xmm6,xmm0,0x00		; xmm6=col0=(00 00 00 00 00 00 00 00)
    142. 

  142. 	pshufd	xmm2,xmm0,0x55		; xmm2=col1=(01 01 01 01 01 01 01 01)
    143. 

  143. 	pshufd	xmm5,xmm0,0xAA		; xmm5=col2=(02 02 02 02 02 02 02 02)
    144. 

  144. 	pshufd	xmm0,xmm0,0xFF		; xmm0=col3=(03 03 03 03 03 03 03 03)
    145. 

  145. 	pshufd	xmm1,xmm7,0x00		; xmm1=col4=(04 04 04 04 04 04 04 04)
    146. 

  146. 	pshufd	xmm4,xmm7,0x55		; xmm4=col5=(05 05 05 05 05 05 05 05)
    147. 

  147. 	pshufd	xmm3,xmm7,0xAA		; xmm3=col6=(06 06 06 06 06 06 06 06)
    148. 

  148. 	pshufd	xmm7,xmm7,0xFF		; xmm7=col7=(07 07 07 07 07 07 07 07)
    149. 

  149. 

  150. 	movdqa	XMMWORD [wk(0)], xmm2	; wk(0)=col1
    151. 

  151. 	movdqa	XMMWORD [wk(1)], xmm0	; wk(1)=col3
    152. 

  152. 	jmp	near .column_end
    153. 

  153. %endif
    154. 

  154. .columnDCT:
    155. 

  155. 

  156. 	; -- Even part
    157. 

  157. 

  158. 	movdqa	xmm0, XMMWORD [XMMBLOCK(0,0,rsi,SIZEOF_JCOEF)]
    159. 

  159. 	movdqa	xmm1, XMMWORD [XMMBLOCK(2,0,rsi,SIZEOF_JCOEF)]
    160. 

  160. 	pmullw	xmm0, XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_IFAST_MULT_TYPE)]
    161. 

  161. 	pmullw	xmm1, XMMWORD [XMMBLOCK(2,0,rdx,SIZEOF_IFAST_MULT_TYPE)]
    162. 

  162. 	movdqa	xmm2, XMMWORD [XMMBLOCK(4,0,rsi,SIZEOF_JCOEF)]
    163. 

  163. 	movdqa	xmm3, XMMWORD [XMMBLOCK(6,0,rsi,SIZEOF_JCOEF)]
    164. 

  164. 	pmullw	xmm2, XMMWORD [XMMBLOCK(4,0,rdx,SIZEOF_IFAST_MULT_TYPE)]
    165. 

  165. 	pmullw	xmm3, XMMWORD [XMMBLOCK(6,0,rdx,SIZEOF_IFAST_MULT_TYPE)]
    166. 

  166. 

  167. 	movdqa	xmm4,xmm0
    168. 

  168. 	movdqa	xmm5,xmm1
    169. 

  169. 	psubw	xmm0,xmm2		; xmm0=tmp11
    170. 

  170. 	psubw	xmm1,xmm3
    171. 

  171. 	paddw	xmm4,xmm2		; xmm4=tmp10
    172. 

  172. 	paddw	xmm5,xmm3		; xmm5=tmp13
    173. 

  173. 

  174. 	psllw	xmm1,PRE_MULTIPLY_SCALE_BITS
    175. 

  175. 	pmulhw	xmm1,[rel PW_F1414]
    176. 

  176. 	psubw	xmm1,xmm5		; xmm1=tmp12
    177. 

  177. 

  178. 	movdqa	xmm6,xmm4
    179. 

  179. 	movdqa	xmm7,xmm0
    180. 

  180. 	psubw	xmm4,xmm5		; xmm4=tmp3
    181. 

  181. 	psubw	xmm0,xmm1		; xmm0=tmp2
    182. 

  182. 	paddw	xmm6,xmm5		; xmm6=tmp0
    183. 

  183. 	paddw	xmm7,xmm1		; xmm7=tmp1
    184. 

  184. 

  185. 	movdqa	XMMWORD [wk(1)], xmm4	; wk(1)=tmp3
    186. 

  186. 	movdqa	XMMWORD [wk(0)], xmm0	; wk(0)=tmp2
    187. 

  187. 

  188. 	; -- Odd part
    189. 

  189. 

  190. 	movdqa	xmm2, XMMWORD [XMMBLOCK(1,0,rsi,SIZEOF_JCOEF)]
    191. 

  191. 	movdqa	xmm3, XMMWORD [XMMBLOCK(3,0,rsi,SIZEOF_JCOEF)]
    192. 

  192. 	pmullw	xmm2, XMMWORD [XMMBLOCK(1,0,rdx,SIZEOF_IFAST_MULT_TYPE)]
    193. 

  193. 	pmullw	xmm3, XMMWORD [XMMBLOCK(3,0,rdx,SIZEOF_IFAST_MULT_TYPE)]
    194. 

  194. 	movdqa	xmm5, XMMWORD [XMMBLOCK(5,0,rsi,SIZEOF_JCOEF)]
    195. 

  195. 	movdqa	xmm1, XMMWORD [XMMBLOCK(7,0,rsi,SIZEOF_JCOEF)]
    196. 

  196. 	pmullw	xmm5, XMMWORD [XMMBLOCK(5,0,rdx,SIZEOF_IFAST_MULT_TYPE)]
    197. 

  197. 	pmullw	xmm1, XMMWORD [XMMBLOCK(7,0,rdx,SIZEOF_IFAST_MULT_TYPE)]
    198. 

  198. 

  199. 	movdqa	xmm4,xmm2
    200. 

  200. 	movdqa	xmm0,xmm5
    201. 

  201. 	psubw	xmm2,xmm1		; xmm2=z12
    202. 

  202. 	psubw	xmm5,xmm3		; xmm5=z10
    203. 

  203. 	paddw	xmm4,xmm1		; xmm4=z11
    204. 

  204. 	paddw	xmm0,xmm3		; xmm0=z13
    205. 

  205. 

  206. 	movdqa	xmm1,xmm5		; xmm1=z10(unscaled)
    207. 

  207. 	psllw	xmm2,PRE_MULTIPLY_SCALE_BITS
    208. 

  208. 	psllw	xmm5,PRE_MULTIPLY_SCALE_BITS
    209. 

  209. 

  210. 	movdqa	xmm3,xmm4
    211. 

  211. 	psubw	xmm4,xmm0
    212. 

  212. 	paddw	xmm3,xmm0		; xmm3=tmp7
    213. 

  213. 

  214. 	psllw	xmm4,PRE_MULTIPLY_SCALE_BITS
    215. 

  215. 	pmulhw	xmm4,[rel PW_F1414]	; xmm4=tmp11
    216. 

  216. 

  217. 	; To avoid overflow...
    218. 

  218. 	;
    219. 

  219. 	; (Original)
    220. 

  220. 	; tmp12 = -2.613125930 * z10 + z5;
    221. 

  221. 	;
    222. 

  222. 	; (This implementation)
    223. 

  223. 	; tmp12 = (-1.613125930 - 1) * z10 + z5;
    224. 

  224. 	;       = -1.613125930 * z10 - z10 + z5;
    225. 

  225. 

  226. 	movdqa	xmm0,xmm5
    227. 

  227. 	paddw	xmm5,xmm2
    228. 

  228. 	pmulhw	xmm5,[rel PW_F1847]	; xmm5=z5
    229. 

  229. 	pmulhw	xmm0,[rel PW_MF1613]
    230. 

  230. 	pmulhw	xmm2,[rel PW_F1082]
    231. 

  231. 	psubw	xmm0,xmm1
    232. 

  232. 	psubw	xmm2,xmm5		; xmm2=tmp10
    233. 

  233. 	paddw	xmm0,xmm5		; xmm0=tmp12
    234. 

  234. 

  235. 	; -- Final output stage
    236. 

  236. 

  237. 	psubw	xmm0,xmm3		; xmm0=tmp6
    238. 

  238. 	movdqa	xmm1,xmm6
    239. 

  239. 	movdqa	xmm5,xmm7
    240. 

  240. 	paddw	xmm6,xmm3		; xmm6=data0=(00 01 02 03 04 05 06 07)
    241. 

  241. 	paddw	xmm7,xmm0		; xmm7=data1=(10 11 12 13 14 15 16 17)
    242. 

  242. 	psubw	xmm1,xmm3		; xmm1=data7=(70 71 72 73 74 75 76 77)
    243. 

  243. 	psubw	xmm5,xmm0		; xmm5=data6=(60 61 62 63 64 65 66 67)
    244. 

  244. 	psubw	xmm4,xmm0		; xmm4=tmp5
    245. 

  245. 

  246. 	movdqa    xmm3,xmm6		; transpose coefficients(phase 1)
    247. 

  247. 	punpcklwd xmm6,xmm7		; xmm6=(00 10 01 11 02 12 03 13)
    248. 

  248. 	punpckhwd xmm3,xmm7		; xmm3=(04 14 05 15 06 16 07 17)
    249. 

  249. 	movdqa    xmm0,xmm5		; transpose coefficients(phase 1)
    250. 

  250. 	punpcklwd xmm5,xmm1		; xmm5=(60 70 61 71 62 72 63 73)
    251. 

  251. 	punpckhwd xmm0,xmm1		; xmm0=(64 74 65 75 66 76 67 77)
    252. 

  252. 

  253. 	movdqa	xmm7, XMMWORD [wk(0)]	; xmm7=tmp2
    254. 

  254. 	movdqa	xmm1, XMMWORD [wk(1)]	; xmm1=tmp3
    255. 

  255. 

  256. 	movdqa	XMMWORD [wk(0)], xmm5	; wk(0)=(60 70 61 71 62 72 63 73)
    257. 

  257. 	movdqa	XMMWORD [wk(1)], xmm0	; wk(1)=(64 74 65 75 66 76 67 77)
    258. 

  258. 

  259. 	paddw	xmm2,xmm4		; xmm2=tmp4
    260. 

  260. 	movdqa	xmm5,xmm7
    261. 

  261. 	movdqa	xmm0,xmm1
    262. 

  262. 	paddw	xmm7,xmm4		; xmm7=data2=(20 21 22 23 24 25 26 27)
    263. 

  263. 	paddw	xmm1,xmm2		; xmm1=data4=(40 41 42 43 44 45 46 47)
    264. 

  264. 	psubw	xmm5,xmm4		; xmm5=data5=(50 51 52 53 54 55 56 57)
    265. 

  265. 	psubw	xmm0,xmm2		; xmm0=data3=(30 31 32 33 34 35 36 37)
    266. 

  266. 

  267. 	movdqa    xmm4,xmm7		; transpose coefficients(phase 1)
    268. 

  268. 	punpcklwd xmm7,xmm0		; xmm7=(20 30 21 31 22 32 23 33)
    269. 

  269. 	punpckhwd xmm4,xmm0		; xmm4=(24 34 25 35 26 36 27 37)
    270. 

  270. 	movdqa    xmm2,xmm1		; transpose coefficients(phase 1)
    271. 

  271. 	punpcklwd xmm1,xmm5		; xmm1=(40 50 41 51 42 52 43 53)
    272. 

  272. 	punpckhwd xmm2,xmm5		; xmm2=(44 54 45 55 46 56 47 57)
    273. 

  273. 

  274. 	movdqa    xmm0,xmm3		; transpose coefficients(phase 2)
    275. 

  275. 	punpckldq xmm3,xmm4		; xmm3=(04 14 24 34 05 15 25 35)
    276. 

  276. 	punpckhdq xmm0,xmm4		; xmm0=(06 16 26 36 07 17 27 37)
    277. 

  277. 	movdqa    xmm5,xmm6		; transpose coefficients(phase 2)
    278. 

  278. 	punpckldq xmm6,xmm7		; xmm6=(00 10 20 30 01 11 21 31)
    279. 

  279. 	punpckhdq xmm5,xmm7		; xmm5=(02 12 22 32 03 13 23 33)
    280. 

  280. 

  281. 	movdqa	xmm4, XMMWORD [wk(0)]	; xmm4=(60 70 61 71 62 72 63 73)
    282. 

  282. 	movdqa	xmm7, XMMWORD [wk(1)]	; xmm7=(64 74 65 75 66 76 67 77)
    283. 

  283. 

  284. 	movdqa	XMMWORD [wk(0)], xmm3	; wk(0)=(04 14 24 34 05 15 25 35)
    285. 

  285. 	movdqa	XMMWORD [wk(1)], xmm0	; wk(1)=(06 16 26 36 07 17 27 37)
    286. 

  286. 

  287. 	movdqa    xmm3,xmm1		; transpose coefficients(phase 2)
    288. 

  288. 	punpckldq xmm1,xmm4		; xmm1=(40 50 60 70 41 51 61 71)
    289. 

  289. 	punpckhdq xmm3,xmm4		; xmm3=(42 52 62 72 43 53 63 73)
    290. 

  290. 	movdqa    xmm0,xmm2		; transpose coefficients(phase 2)
    291. 

  291. 	punpckldq xmm2,xmm7		; xmm2=(44 54 64 74 45 55 65 75)
    292. 

  292. 	punpckhdq xmm0,xmm7		; xmm0=(46 56 66 76 47 57 67 77)
    293. 

  293. 

  294. 	movdqa     xmm4,xmm6		; transpose coefficients(phase 3)
    295. 

  295. 	punpcklqdq xmm6,xmm1		; xmm6=col0=(00 10 20 30 40 50 60 70)
    296. 

  296. 	punpckhqdq xmm4,xmm1		; xmm4=col1=(01 11 21 31 41 51 61 71)
    297. 

  297. 	movdqa     xmm7,xmm5		; transpose coefficients(phase 3)
    298. 

  298. 	punpcklqdq xmm5,xmm3		; xmm5=col2=(02 12 22 32 42 52 62 72)
    299. 

  299. 	punpckhqdq xmm7,xmm3		; xmm7=col3=(03 13 23 33 43 53 63 73)
    300. 

  300. 

  301. 	movdqa	xmm1, XMMWORD [wk(0)]	; xmm1=(04 14 24 34 05 15 25 35)
    302. 

  302. 	movdqa	xmm3, XMMWORD [wk(1)]	; xmm3=(06 16 26 36 07 17 27 37)
    303. 

  303. 

  304. 	movdqa	XMMWORD [wk(0)], xmm4	; wk(0)=col1
    305. 

  305. 	movdqa	XMMWORD [wk(1)], xmm7	; wk(1)=col3
    306. 

  306. 

  307. 	movdqa     xmm4,xmm1		; transpose coefficients(phase 3)
    308. 

  308. 	punpcklqdq xmm1,xmm2		; xmm1=col4=(04 14 24 34 44 54 64 74)
    309. 

  309. 	punpckhqdq xmm4,xmm2		; xmm4=col5=(05 15 25 35 45 55 65 75)
    310. 

  310. 	movdqa     xmm7,xmm3		; transpose coefficients(phase 3)
    311. 

  311. 	punpcklqdq xmm3,xmm0		; xmm3=col6=(06 16 26 36 46 56 66 76)
    312. 

  312. 	punpckhqdq xmm7,xmm0		; xmm7=col7=(07 17 27 37 47 57 67 77)
    313. 

  313. .column_end:
    314. 

  314. 

  315. 	; -- Prefetch the next coefficient block
    316. 

  316. 

  317. 	prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 0*32]
    318. 

  318. 	prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 1*32]
    319. 

  319. 	prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 2*32]
    320. 

  320. 	prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 3*32]
    321. 

  321. 

  322. 	; ---- Pass 2: process rows from work array, store into output array.
    323. 

  323. 

  324. 	mov	rax, [original_rbp]
    325. 

  325. 	mov	rdi, r12	; (JSAMPROW *)
    326. 

  326. 	mov	rax, r13
    327. 

  327. 

  328. 	; -- Even part
    329. 

  329. 

  330. 	; xmm6=col0, xmm5=col2, xmm1=col4, xmm3=col6
    331. 

  331. 

  332. 	movdqa	xmm2,xmm6
    333. 

  333. 	movdqa	xmm0,xmm5
    334. 

  334. 	psubw	xmm6,xmm1		; xmm6=tmp11
    335. 

  335. 	psubw	xmm5,xmm3
    336. 

  336. 	paddw	xmm2,xmm1		; xmm2=tmp10
    337. 

  337. 	paddw	xmm0,xmm3		; xmm0=tmp13
    338. 

  338. 

  339. 	psllw	xmm5,PRE_MULTIPLY_SCALE_BITS
    340. 

  340. 	pmulhw	xmm5,[rel PW_F1414]
    341. 

  341. 	psubw	xmm5,xmm0		; xmm5=tmp12
    342. 

  342. 

  343. 	movdqa	xmm1,xmm2
    344. 

  344. 	movdqa	xmm3,xmm6
    345. 

  345. 	psubw	xmm2,xmm0		; xmm2=tmp3
    346. 

  346. 	psubw	xmm6,xmm5		; xmm6=tmp2
    347. 

  347. 	paddw	xmm1,xmm0		; xmm1=tmp0
    348. 

  348. 	paddw	xmm3,xmm5		; xmm3=tmp1
    349. 

  349. 

  350. 	movdqa	xmm0, XMMWORD [wk(0)]	; xmm0=col1
    351. 

  351. 	movdqa	xmm5, XMMWORD [wk(1)]	; xmm5=col3
    352. 

  352. 

  353. 	movdqa	XMMWORD [wk(0)], xmm2	; wk(0)=tmp3
    354. 

  354. 	movdqa	XMMWORD [wk(1)], xmm6	; wk(1)=tmp2
    355. 

  355. 

  356. 	; -- Odd part
    357. 

  357. 

  358. 	; xmm0=col1, xmm5=col3, xmm4=col5, xmm7=col7
    359. 

  359. 

  360. 	movdqa	xmm2,xmm0
    361. 

  361. 	movdqa	xmm6,xmm4
    362. 

  362. 	psubw	xmm0,xmm7		; xmm0=z12
    363. 

  363. 	psubw	xmm4,xmm5		; xmm4=z10
    364. 

  364. 	paddw	xmm2,xmm7		; xmm2=z11
    365. 

  365. 	paddw	xmm6,xmm5		; xmm6=z13
    366. 

  366. 

  367. 	movdqa	xmm7,xmm4		; xmm7=z10(unscaled)
    368. 

  368. 	psllw	xmm0,PRE_MULTIPLY_SCALE_BITS
    369. 

  369. 	psllw	xmm4,PRE_MULTIPLY_SCALE_BITS
    370. 

  370. 

  371. 	movdqa	xmm5,xmm2
    372. 

  372. 	psubw	xmm2,xmm6
    373. 

  373. 	paddw	xmm5,xmm6		; xmm5=tmp7
    374. 

  374. 

  375. 	psllw	xmm2,PRE_MULTIPLY_SCALE_BITS
    376. 

  376. 	pmulhw	xmm2,[rel PW_F1414]	; xmm2=tmp11
    377. 

  377. 

  378. 	; To avoid overflow...
    379. 

  379. 	;
    380. 

  380. 	; (Original)
    381. 

  381. 	; tmp12 = -2.613125930 * z10 + z5;
    382. 

  382. 	;
    383. 

  383. 	; (This implementation)
    384. 

  384. 	; tmp12 = (-1.613125930 - 1) * z10 + z5;
    385. 

  385. 	;       = -1.613125930 * z10 - z10 + z5;
    386. 

  386. 

  387. 	movdqa	xmm6,xmm4
    388. 

  388. 	paddw	xmm4,xmm0
    389. 

  389. 	pmulhw	xmm4,[rel PW_F1847]	; xmm4=z5
    390. 

  390. 	pmulhw	xmm6,[rel PW_MF1613]
    391. 

  391. 	pmulhw	xmm0,[rel PW_F1082]
    392. 

  392. 	psubw	xmm6,xmm7
    393. 

  393. 	psubw	xmm0,xmm4		; xmm0=tmp10
    394. 

  394. 	paddw	xmm6,xmm4		; xmm6=tmp12
    395. 

  395. 

  396. 	; -- Final output stage
    397. 

  397. 

  398. 	psubw	xmm6,xmm5		; xmm6=tmp6
    399. 

  399. 	movdqa	xmm7,xmm1
    400. 

  400. 	movdqa	xmm4,xmm3
    401. 

  401. 	paddw	xmm1,xmm5		; xmm1=data0=(00 10 20 30 40 50 60 70)
    402. 

  402. 	paddw	xmm3,xmm6		; xmm3=data1=(01 11 21 31 41 51 61 71)
    403. 

  403. 	psraw	xmm1,(PASS1_BITS+3)	; descale
    404. 

  404. 	psraw	xmm3,(PASS1_BITS+3)	; descale
    405. 

  405. 	psubw	xmm7,xmm5		; xmm7=data7=(07 17 27 37 47 57 67 77)
    406. 

  406. 	psubw	xmm4,xmm6		; xmm4=data6=(06 16 26 36 46 56 66 76)
    407. 

  407. 	psraw	xmm7,(PASS1_BITS+3)	; descale
    408. 

  408. 	psraw	xmm4,(PASS1_BITS+3)	; descale
    409. 

  409. 	psubw	xmm2,xmm6		; xmm2=tmp5
    410. 

  410. 

  411. 	packsswb  xmm1,xmm4	; xmm1=(00 10 20 30 40 50 60 70 06 16 26 36 46 56 66 76)
    412. 

  412. 	packsswb  xmm3,xmm7	; xmm3=(01 11 21 31 41 51 61 71 07 17 27 37 47 57 67 77)
    413. 

  413. 

  414. 	movdqa	xmm5, XMMWORD [wk(1)]	; xmm5=tmp2
    415. 

  415. 	movdqa	xmm6, XMMWORD [wk(0)]	; xmm6=tmp3
    416. 

  416. 

  417. 	paddw	xmm0,xmm2		; xmm0=tmp4
    418. 

  418. 	movdqa	xmm4,xmm5
    419. 

  419. 	movdqa	xmm7,xmm6
    420. 

  420. 	paddw	xmm5,xmm2		; xmm5=data2=(02 12 22 32 42 52 62 72)
    421. 

  421. 	paddw	xmm6,xmm0		; xmm6=data4=(04 14 24 34 44 54 64 74)
    422. 

  422. 	psraw	xmm5,(PASS1_BITS+3)	; descale
    423. 

  423. 	psraw	xmm6,(PASS1_BITS+3)	; descale
    424. 

  424. 	psubw	xmm4,xmm2		; xmm4=data5=(05 15 25 35 45 55 65 75)
    425. 

  425. 	psubw	xmm7,xmm0		; xmm7=data3=(03 13 23 33 43 53 63 73)
    426. 

  426. 	psraw	xmm4,(PASS1_BITS+3)	; descale
    427. 

  427. 	psraw	xmm7,(PASS1_BITS+3)	; descale
    428. 

  428. 

  429. 	movdqa    xmm2,[rel PB_CENTERJSAMP]	; xmm2=[rel PB_CENTERJSAMP]
    430. 

  430. 

  431. 	packsswb  xmm5,xmm6	; xmm5=(02 12 22 32 42 52 62 72 04 14 24 34 44 54 64 74)
    432. 

  432. 	packsswb  xmm7,xmm4	; xmm7=(03 13 23 33 43 53 63 73 05 15 25 35 45 55 65 75)
    433. 

  433. 

  434. 	paddb     xmm1,xmm2
    435. 

  435. 	paddb     xmm3,xmm2
    436. 

  436. 	paddb     xmm5,xmm2
    437. 

  437. 	paddb     xmm7,xmm2
    438. 

  438. 

  439. 	movdqa    xmm0,xmm1	; transpose coefficients(phase 1)
    440. 

  440. 	punpcklbw xmm1,xmm3	; xmm1=(00 01 10 11 20 21 30 31 40 41 50 51 60 61 70 71)
    441. 

  441. 	punpckhbw xmm0,xmm3	; xmm0=(06 07 16 17 26 27 36 37 46 47 56 57 66 67 76 77)
    442. 

  442. 	movdqa    xmm6,xmm5	; transpose coefficients(phase 1)
    443. 

  443. 	punpcklbw xmm5,xmm7	; xmm5=(02 03 12 13 22 23 32 33 42 43 52 53 62 63 72 73)
    444. 

  444. 	punpckhbw xmm6,xmm7	; xmm6=(04 05 14 15 24 25 34 35 44 45 54 55 64 65 74 75)
    445. 

  445. 

  446. 	movdqa    xmm4,xmm1	; transpose coefficients(phase 2)
    447. 

  447. 	punpcklwd xmm1,xmm5	; xmm1=(00 01 02 03 10 11 12 13 20 21 22 23 30 31 32 33)
    448. 

  448. 	punpckhwd xmm4,xmm5	; xmm4=(40 41 42 43 50 51 52 53 60 61 62 63 70 71 72 73)
    449. 

  449. 	movdqa    xmm2,xmm6	; transpose coefficients(phase 2)
    450. 

  450. 	punpcklwd xmm6,xmm0	; xmm6=(04 05 06 07 14 15 16 17 24 25 26 27 34 35 36 37)
    451. 

  451. 	punpckhwd xmm2,xmm0	; xmm2=(44 45 46 47 54 55 56 57 64 65 66 67 74 75 76 77)
    452. 

  452. 

  453. 	movdqa    xmm3,xmm1	; transpose coefficients(phase 3)
    454. 

  454. 	punpckldq xmm1,xmm6	; xmm1=(00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17)
    455. 

  455. 	punpckhdq xmm3,xmm6	; xmm3=(20 21 22 23 24 25 26 27 30 31 32 33 34 35 36 37)
    456. 

  456. 	movdqa    xmm7,xmm4	; transpose coefficients(phase 3)
    457. 

  457. 	punpckldq xmm4,xmm2	; xmm4=(40 41 42 43 44 45 46 47 50 51 52 53 54 55 56 57)
    458. 

  458. 	punpckhdq xmm7,xmm2	; xmm7=(60 61 62 63 64 65 66 67 70 71 72 73 74 75 76 77)
    459. 

  459. 

  460. 	pshufd	xmm5,xmm1,0x4E	; xmm5=(10 11 12 13 14 15 16 17 00 01 02 03 04 05 06 07)
    461. 

  461. 	pshufd	xmm0,xmm3,0x4E	; xmm0=(30 31 32 33 34 35 36 37 20 21 22 23 24 25 26 27)
    462. 

  462. 	pshufd	xmm6,xmm4,0x4E	; xmm6=(50 51 52 53 54 55 56 57 40 41 42 43 44 45 46 47)
    463. 

  463. 	pshufd	xmm2,xmm7,0x4E	; xmm2=(70 71 72 73 74 75 76 77 60 61 62 63 64 65 66 67)
    464. 

  464. 

  465. 	mov	rdx, JSAMPROW [rdi+0*SIZEOF_JSAMPROW]
    466. 

  466. 	mov	rsi, JSAMPROW [rdi+2*SIZEOF_JSAMPROW]
    467. 

  467. 	movq	XMM_MMWORD [rdx+rax*SIZEOF_JSAMPLE], xmm1
    468. 

  468. 	movq	XMM_MMWORD [rsi+rax*SIZEOF_JSAMPLE], xmm3
    469. 

  469. 	mov	rdx, JSAMPROW [rdi+4*SIZEOF_JSAMPROW]
    470. 

  470. 	mov	rsi, JSAMPROW [rdi+6*SIZEOF_JSAMPROW]
    471. 

  471. 	movq	XMM_MMWORD [rdx+rax*SIZEOF_JSAMPLE], xmm4
    472. 

  472. 	movq	XMM_MMWORD [rsi+rax*SIZEOF_JSAMPLE], xmm7
    473. 

  473. 

  474. 	mov	rdx, JSAMPROW [rdi+1*SIZEOF_JSAMPROW]
    475. 

  475. 	mov	rsi, JSAMPROW [rdi+3*SIZEOF_JSAMPROW]
    476. 

  476. 	movq	XMM_MMWORD [rdx+rax*SIZEOF_JSAMPLE], xmm5
    477. 

  477. 	movq	XMM_MMWORD [rsi+rax*SIZEOF_JSAMPLE], xmm0
    478. 

  478. 	mov	rdx, JSAMPROW [rdi+5*SIZEOF_JSAMPROW]
    479. 

  479. 	mov	rsi, JSAMPROW [rdi+7*SIZEOF_JSAMPROW]
    480. 

  480. 	movq	XMM_MMWORD [rdx+rax*SIZEOF_JSAMPLE], xmm6
    481. 

  481. 	movq	XMM_MMWORD [rsi+rax*SIZEOF_JSAMPLE], xmm2
    482. 

  482. 

  483. 	uncollect_args
    484. 

  484. 	mov	rsp,rbp		; rsp <- aligned rbp
    485. 

  485. 	pop	rsp		; rsp <- original rbp
    486. 

  486. 	pop	rbp
    487. 

  487. 	ret
    488. 

  488. 	ret
    489. 

  489. 

  490. ; For some reason, the OS X linker does not honor the request to align the
    491. 

  491. ; segment unless we do this.
    492. 

  492. 	align	16
    493.