ffmpeg/libavcodec/x86/videodsp.asm

   1 ;******************************************************************************
   2 ;* Core video DSP functions
   3 ;* Copyright (c) 2012 Ronald S. Bultje <rsbultje@gmail.com>
   4 ;*
   5 ;* This file is part of FFmpeg.
   6 ;*
   7 ;* FFmpeg is free software; you can redistribute it and/or
   8 ;* modify it under the terms of the GNU Lesser General Public
   9 ;* License as published by the Free Software Foundation; either
  10 ;* version 2.1 of the License, or (at your option) any later version.
  11 ;*
  12 ;* FFmpeg is distributed in the hope that it will be useful,
  13 ;* but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 ;* Lesser General Public License for more details.
  16 ;*
  17 ;* You should have received a copy of the GNU Lesser General Public
  18 ;* License along with FFmpeg; if not, write to the Free Software
  19 ;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20 ;******************************************************************************
  21
  22 %include "libavutil/x86/x86util.asm"
  23
  24 SECTION .text
  25
  26 ; slow vertical extension loop function. Works with variable-width, and
  27 ; does per-line reading/writing of source data
  28
  29 %macro V_COPY_ROW 2 ; type (top/body/bottom), h
  30 .%1_y_loop:                                     ; do {
  31     mov              wq, r7mp                   ;   initialize w (r7mp = wmp)
  32 .%1_x_loop:                                     ;   do {
  33     movu             m0, [srcq+wq]              ;     m0 = read($mmsize)
  34     movu      [dstq+wq], m0                     ;     write(m0, $mmsize)
  35     add              wq, mmsize                 ;     w -= $mmsize
  36     cmp              wq, -mmsize                ;   } while (w > $mmsize);
  37     jl .%1_x_loop
  38     movu             m0, [srcq-mmsize]          ;     m0 = read($mmsize)
  39     movu  [dstq-mmsize], m0                     ;     write(m0, $mmsize)
  40 %ifidn %1, body                                 ;   if ($type == body) {
  41     add            srcq, src_strideq            ;     src += src_stride
  42 %endif                                          ;   }
  43     add            dstq, dst_strideq            ;   dst += dst_stride
  44     dec              %2                         ; } while (--$h);
  45     jnz .%1_y_loop
  46 %endmacro
  47
  48 %macro vvar_fn 0
  49 ; .----. <- zero
  50 ; |    |    <- top is copied from first line in body of source
  51 ; |----| <- start_y
  52 ; |    |    <- body is copied verbatim (line-by-line) from source
  53 ; |----| <- end_y
  54 ; |    |    <- bottom is copied from last line in body of source
  55 ; '----' <- bh
  56 %if ARCH_X86_64
  57 cglobal emu_edge_vvar, 7, 8, 1, dst, dst_stride, src, src_stride, \
  58                                 start_y, end_y, bh, w
  59 %else ; x86-32
  60 cglobal emu_edge_vvar, 1, 6, 1, dst, src, start_y, end_y, bh, w
  61 %define src_strideq r3mp
  62 %define dst_strideq r1mp
  63     mov            srcq, r2mp
  64     mov        start_yq, r4mp
  65     mov          end_yq, r5mp
  66     mov             bhq, r6mp
  67 %endif
  68     sub             bhq, end_yq                 ; bh    -= end_q
  69     sub          end_yq, start_yq               ; end_q -= start_q
  70     add            srcq, r7mp                   ; (r7mp = wmp)
  71     add            dstq, r7mp                   ; (r7mp = wmp)
  72     neg            r7mp                         ; (r7mp = wmp)
  73     test       start_yq, start_yq               ; if (start_q) {
  74     jz .body
  75     V_COPY_ROW      top, start_yq               ;   v_copy_row(top, start_yq)
  76 .body:                                          ; }
  77     V_COPY_ROW     body, end_yq                 ; v_copy_row(body, end_yq)
  78     test            bhq, bhq                    ; if (bh) {
  79     jz .end
  80     sub            srcq, src_strideq            ;   src -= src_stride
  81     V_COPY_ROW   bottom, bhq                    ;   v_copy_row(bottom, bh)
  82 .end:                                           ; }
  83     RET
  84 %endmacro
  85
  86 %if ARCH_X86_32
  87 INIT_MMX mmx
  88 vvar_fn
  89 %endif
  90
  91 INIT_XMM sse
  92 vvar_fn
  93
  94 %macro hvar_fn 0
  95 cglobal emu_edge_hvar, 5, 6, 1, dst, dst_stride, start_x, n_words, h, w
  96     lea            dstq, [dstq+n_wordsq*2]
  97     neg        n_wordsq
  98     lea        start_xq, [start_xq+n_wordsq*2]
  99 .y_loop:                                        ; do {
 100 %if cpuflag(avx2)
 101     vpbroadcastb     m0, [dstq+start_xq]
 102     mov              wq, n_wordsq               ;   initialize w
 103 %else
 104     movzx            wd, byte [dstq+start_xq]   ;   w = read(1)
 105     imul             wd, 0x01010101             ;   w *= 0x01010101
 106     movd             m0, wd
 107     mov              wq, n_wordsq               ;   initialize w
 108 %if cpuflag(sse2)
 109     pshufd           m0, m0, q0000              ;   splat
 110 %else ; mmx
 111     punpckldq        m0, m0                     ;   splat
 112 %endif ; mmx/sse
 113 %endif ; avx2
 114 .x_loop:                                        ;   do {
 115     movu    [dstq+wq*2], m0                     ;     write($reg, $mmsize)
 116     add              wq, mmsize/2               ;     w -= $mmsize/2
 117     cmp              wq, -mmsize/2              ;   } while (w > $mmsize/2)
 118     jl .x_loop
 119     movu  [dstq-mmsize], m0                     ;   write($reg, $mmsize)
 120     add            dstq, dst_strideq            ;   dst += dst_stride
 121     dec              hq                         ; } while (h--)
 122     jnz .y_loop
 123     RET
 124 %endmacro
 125
 126 %if ARCH_X86_32
 127 INIT_MMX mmx
 128 hvar_fn
 129 %endif
 130
 131 INIT_XMM sse2
 132 hvar_fn
 133
 134 %if HAVE_AVX2_EXTERNAL
 135 INIT_XMM avx2
 136 hvar_fn
 137 %endif
 138
 139 ; macro to read/write a horizontal number of pixels (%2) to/from registers
 140 ; on sse, - fills xmm0-15 for consecutive sets of 16 pixels
 141 ;         - if (%2 & 8)  fills 8 bytes into xmm$next
 142 ;         - if (%2 & 4)  fills 4 bytes into xmm$next
 143 ;         - if (%2 & 3)  fills 1, 2 or 4 bytes in eax
 144 ; on mmx, - fills mm0-7 for consecutive sets of 8 pixels
 145 ;         - if (%2 & 4)  fills 4 bytes into mm$next
 146 ;         - if (%2 & 3)  fills 1, 2 or 4 bytes in eax
 147 ; writing data out is in the same way
 148 %macro READ_NUM_BYTES 2
 149 %assign %%off 0     ; offset in source buffer
 150 %assign %%mmx_idx 0 ; mmx register index
 151 %assign %%xmm_idx 0 ; xmm register index
 152
 153 %rep %2/mmsize
 154 %if mmsize == 16
 155     movu   xmm %+ %%xmm_idx, [srcq+%%off]
 156 %assign %%xmm_idx %%xmm_idx+1
 157 %else ; mmx
 158     movu    mm %+ %%mmx_idx, [srcq+%%off]
 159 %assign %%mmx_idx %%mmx_idx+1
 160 %endif
 161 %assign %%off %%off+mmsize
 162 %endrep ; %2/mmsize
 163
 164 %if mmsize == 16
 165 %if (%2-%%off) >= 8
 166 %if %2 > 16 && (%2-%%off) > 8
 167     movu   xmm %+ %%xmm_idx, [srcq+%2-16]
 168 %assign %%xmm_idx %%xmm_idx+1
 169 %assign %%off %2
 170 %else
 171     movq    mm %+ %%mmx_idx, [srcq+%%off]
 172 %assign %%mmx_idx %%mmx_idx+1
 173 %assign %%off %%off+8
 174 %endif
 175 %endif ; (%2-%%off) >= 8
 176 %endif
 177
 178 %if (%2-%%off) >= 4
 179 %if %2 > 8 && (%2-%%off) > 4
 180     movq    mm %+ %%mmx_idx, [srcq+%2-8]
 181 %assign %%off %2
 182 %else
 183     movd    mm %+ %%mmx_idx, [srcq+%%off]
 184 %assign %%off %%off+4
 185 %endif
 186 %assign %%mmx_idx %%mmx_idx+1
 187 %endif ; (%2-%%off) >= 4
 188
 189 %if (%2-%%off) >= 1
 190 %if %2 >= 4
 191     movd mm %+ %%mmx_idx, [srcq+%2-4]
 192 %elif (%2-%%off) == 1
 193     mov            valb, [srcq+%2-1]
 194 %elif (%2-%%off) == 2
 195     mov            valw, [srcq+%2-2]
 196 %elifidn %1, body
 197     mov            vald, [srcq+%2-3]
 198 %else
 199     movd mm %+ %%mmx_idx, [srcq+%2-3]
 200 %endif
 201 %endif ; (%2-%%off) >= 1
 202 %endmacro ; READ_NUM_BYTES
 203
 204 %macro WRITE_NUM_BYTES 2
 205 %assign %%off 0     ; offset in destination buffer
 206 %assign %%mmx_idx 0 ; mmx register index
 207 %assign %%xmm_idx 0 ; xmm register index
 208
 209 %rep %2/mmsize
 210 %if mmsize == 16
 211     movu   [dstq+%%off], xmm %+ %%xmm_idx
 212 %assign %%xmm_idx %%xmm_idx+1
 213 %else ; mmx
 214     movu   [dstq+%%off], mm %+ %%mmx_idx
 215 %assign %%mmx_idx %%mmx_idx+1
 216 %endif
 217 %assign %%off %%off+mmsize
 218 %endrep ; %2/mmsize
 219
 220 %if mmsize == 16
 221 %if (%2-%%off) >= 8
 222 %if %2 > 16 && (%2-%%off) > 8
 223     movu   [dstq+%2-16], xmm %+ %%xmm_idx
 224 %assign %%xmm_idx %%xmm_idx+1
 225 %assign %%off %2
 226 %else
 227     movq   [dstq+%%off], mm %+ %%mmx_idx
 228 %assign %%mmx_idx %%mmx_idx+1
 229 %assign %%off %%off+8
 230 %endif
 231 %endif ; (%2-%%off) >= 8
 232 %endif
 233
 234 %if (%2-%%off) >= 4
 235 %if %2 > 8 && (%2-%%off) > 4
 236     movq    [dstq+%2-8], mm %+ %%mmx_idx
 237 %assign %%off %2
 238 %else
 239     movd   [dstq+%%off], mm %+ %%mmx_idx
 240 %assign %%off %%off+4
 241 %endif
 242 %assign %%mmx_idx %%mmx_idx+1
 243 %endif ; (%2-%%off) >= 4
 244
 245 %if (%2-%%off) >= 1
 246 %if %2 >= 4
 247     movd    [dstq+%2-4], mm %+ %%mmx_idx
 248 %elif (%2-%%off) == 1
 249     mov     [dstq+%2-1], valb
 250 %elif (%2-%%off) == 2
 251     mov     [dstq+%2-2], valw
 252 %elifidn %1, body
 253     mov     [dstq+%2-3], valw
 254     shr            vald, 16
 255     mov     [dstq+%2-1], valb
 256 %else
 257     movd           vald, mm %+ %%mmx_idx
 258     mov     [dstq+%2-3], valw
 259     shr            vald, 16
 260     mov     [dstq+%2-1], valb
 261 %endif
 262 %endif ; (%2-%%off) >= 1
 263 %endmacro ; WRITE_NUM_BYTES
 264
 265 ; vertical top/bottom extend and body copy fast loops
 266 ; these are function pointers to set-width line copy functions, i.e.
 267 ; they read a fixed number of pixels into set registers, and write
 268 ; those out into the destination buffer
 269 %macro VERTICAL_EXTEND 2
 270 %assign %%n %1
 271 %rep 1+%2-%1
 272 %if %%n <= 3
 273 %if ARCH_X86_64
 274 cglobal emu_edge_vfix %+ %%n, 6, 8, 0, dst, dst_stride, src, src_stride, \
 275                                        start_y, end_y, val, bh
 276     mov             bhq, r6mp                   ; r6mp = bhmp
 277 %else ; x86-32
 278 cglobal emu_edge_vfix %+ %%n, 0, 6, 0, val, dst, src, start_y, end_y, bh
 279     mov            dstq, r0mp
 280     mov            srcq, r2mp
 281     mov        start_yq, r4mp
 282     mov          end_yq, r5mp
 283     mov             bhq, r6mp
 284 %define dst_strideq r1mp
 285 %define src_strideq r3mp
 286 %endif ; x86-64/32
 287 %else
 288 %if ARCH_X86_64
 289 cglobal emu_edge_vfix %+ %%n, 7, 7, 1, dst, dst_stride, src, src_stride, \
 290                                        start_y, end_y, bh
 291 %else ; x86-32
 292 cglobal emu_edge_vfix %+ %%n, 1, 5, 1, dst, src, start_y, end_y, bh
 293     mov            srcq, r2mp
 294     mov        start_yq, r4mp
 295     mov          end_yq, r5mp
 296     mov             bhq, r6mp
 297 %define dst_strideq r1mp
 298 %define src_strideq r3mp
 299 %endif ; x86-64/32
 300 %endif
 301     ; FIXME move this to c wrapper?
 302     sub             bhq, end_yq                 ; bh    -= end_y
 303     sub          end_yq, start_yq               ; end_y -= start_y
 304
 305     ; extend pixels above body
 306     test       start_yq, start_yq               ; if (start_y) {
 307     jz .body_loop
 308     READ_NUM_BYTES  top, %%n                    ;   $variable_regs = read($n)
 309 .top_loop:                                      ;   do {
 310     WRITE_NUM_BYTES top, %%n                    ;     write($variable_regs, $n)
 311     add            dstq, dst_strideq            ;     dst += linesize
 312     dec        start_yq                         ;   } while (--start_y)
 313     jnz .top_loop                               ; }
 314
 315     ; copy body pixels
 316 .body_loop:                                     ; do {
 317     READ_NUM_BYTES  body, %%n                   ;   $variable_regs = read($n)
 318     WRITE_NUM_BYTES body, %%n                   ;   write($variable_regs, $n)
 319     add            dstq, dst_strideq            ;   dst += dst_stride
 320     add            srcq, src_strideq            ;   src += src_stride
 321     dec          end_yq                         ; } while (--end_y)
 322     jnz .body_loop
 323
 324     ; copy bottom pixels
 325     test            bhq, bhq                    ; if (block_h) {
 326     jz .end
 327     sub            srcq, src_strideq            ;   src -= linesize
 328     READ_NUM_BYTES  bottom, %%n                 ;   $variable_regs = read($n)
 329 .bottom_loop:                                   ;   do {
 330     WRITE_NUM_BYTES bottom, %%n                 ;     write($variable_regs, $n)
 331     add            dstq, dst_strideq            ;     dst += linesize
 332     dec             bhq                         ;   } while (--bh)
 333     jnz .bottom_loop                            ; }
 334
 335 .end:
 336     RET
 337 %assign %%n %%n+1
 338 %endrep ; 1+%2-%1
 339 %endmacro ; VERTICAL_EXTEND
 340
 341 INIT_MMX mmx
 342 VERTICAL_EXTEND 1, 15
 343 %if ARCH_X86_32
 344 VERTICAL_EXTEND 16, 22
 345 %endif
 346
 347 INIT_XMM sse
 348 VERTICAL_EXTEND 16, 22
 349
 350 ; left/right (horizontal) fast extend functions
 351 ; these are essentially identical to the vertical extend ones above,
 352 ; just left/right separated because number of pixels to extend is
 353 ; obviously not the same on both sides.
 354
 355 %macro READ_V_PIXEL 2
 356 %if cpuflag(avx2)
 357     vpbroadcastb     m0, %2
 358 %else
 359     movzx          vald, byte %2
 360     imul           vald, 0x01010101
 361 %if %1 >= 8
 362     movd             m0, vald
 363 %if mmsize == 16
 364     pshufd           m0, m0, q0000
 365 %else
 366     punpckldq        m0, m0
 367 %endif ; mmsize == 16
 368 %endif ; %1 > 16
 369 %endif ; avx2
 370 %endmacro ; READ_V_PIXEL
 371
 372 %macro WRITE_V_PIXEL 2
 373 %assign %%off 0
 374
 375 %if %1 >= 8
 376
 377 %rep %1/mmsize
 378     movu     [%2+%%off], m0
 379 %assign %%off %%off+mmsize
 380 %endrep ; %1/mmsize
 381
 382 %if mmsize == 16
 383 %if %1-%%off >= 8
 384 %if %1 > 16 && %1-%%off > 8
 385     movu     [%2+%1-16], m0
 386 %assign %%off %1
 387 %else
 388     movq     [%2+%%off], m0
 389 %assign %%off %%off+8
 390 %endif
 391 %endif ; %1-%%off >= 8
 392 %endif ; mmsize == 16
 393
 394 %if %1-%%off >= 4
 395 %if %1 > 8 && %1-%%off > 4
 396     movq      [%2+%1-8], m0
 397 %assign %%off %1
 398 %else
 399     movd     [%2+%%off], m0
 400 %assign %%off %%off+4
 401 %endif
 402 %endif ; %1-%%off >= 4
 403
 404 %else ; %1 < 8
 405
 406 %rep %1/4
 407     mov      [%2+%%off], vald
 408 %assign %%off %%off+4
 409 %endrep ; %1/4
 410
 411 %endif ; %1 >=/< 8
 412
 413 %if %1-%%off == 2
 414 %if cpuflag(avx2)
 415     movd     [%2+%%off-2], m0
 416 %else
 417     mov      [%2+%%off], valw
 418 %endif ; avx2
 419 %endif ; (%1-%%off)/2
 420 %endmacro ; WRITE_V_PIXEL
 421
 422 %macro H_EXTEND 2
 423 %assign %%n %1
 424 %rep 1+(%2-%1)/2
 425 %if cpuflag(avx2)
 426 cglobal emu_edge_hfix %+ %%n, 4, 4, 1, dst, dst_stride, start_x, bh
 427 %else
 428 cglobal emu_edge_hfix %+ %%n, 4, 5, 1, dst, dst_stride, start_x, bh, val
 429 %endif
 430 .loop_y:                                        ; do {
 431     READ_V_PIXEL    %%n, [dstq+start_xq]        ;   $variable_regs = read($n)
 432     WRITE_V_PIXEL   %%n, dstq                   ;   write($variable_regs, $n)
 433     add            dstq, dst_strideq            ;   dst += dst_stride
 434     dec             bhq                         ; } while (--bh)
 435     jnz .loop_y
 436     RET
 437 %assign %%n %%n+2
 438 %endrep ; 1+(%2-%1)/2
 439 %endmacro ; H_EXTEND
 440
 441 INIT_MMX mmx
 442 H_EXTEND 2, 14
 443 %if ARCH_X86_32
 444 H_EXTEND 16, 22
 445 %endif
 446
 447 INIT_XMM sse2
 448 H_EXTEND 16, 22
 449
 450 %if HAVE_AVX2_EXTERNAL
 451 INIT_XMM avx2
 452 H_EXTEND 8, 22
 453 %endif
 454
 455 %macro PREFETCH_FN 1
 456 cglobal prefetch, 3, 3, 0, buf, stride, h
 457 .loop:
 458     %1      [bufq]
 459     add      bufq, strideq
 460     dec        hd
 461     jg .loop
 462     REP_RET
 463 %endmacro
 464
 465 INIT_MMX mmxext
 466 PREFETCH_FN prefetcht0
 467 %if ARCH_X86_32
 468 INIT_MMX 3dnow
 469 PREFETCH_FN prefetch
 470 %endif