lavc: introduce VideoDSPContext

Move some functions from dsputil. The idea is that videodsp contains
functions that are useful for a large and varied set of video decoders.
Currently, it contains emulated_edge_mc() and prefetch().

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

1 files changed, 0 insertions, 571 deletions

diff --git a/libavcodec/x86/dsputil.asm b/libavcodec/x86/dsputil.asm
index dd0c795235..b9990bb1ba 100644
--- a/libavcodec/x86/dsputil.asm
+++ b/libavcodec/x86/dsputil.asm
@@ -489,577 +489,6 @@ cglobal scalarproduct_float, 3,3,2, v1, v2, offset
 %endif
     RET
 
-; extern void ff_emu_edge_core(uint8_t *buf, const uint8_t *src, x86_reg linesize,
-;                              x86_reg start_y, x86_reg end_y, x86_reg block_h,
-;                              x86_reg start_x, x86_reg end_x, x86_reg block_w);
-;
-; The actual function itself is below. It basically wraps a very simple
-; w = end_x - start_x
-; if (w) {
-;   if (w > 22) {
-;     jump to the slow loop functions
-;   } else {
-;     jump to the fast loop functions
-;   }
-; }
-;
-; ... and then the same for left/right extend also. See below for loop
-; function implementations. Fast are fixed-width, slow is variable-width
-
-%macro EMU_EDGE_FUNC 0
-%if ARCH_X86_64
-%define w_reg r7
-cglobal emu_edge_core, 6, 9, 1
-    mov         r8, r5          ; save block_h
-%else
-%define w_reg r6
-cglobal emu_edge_core, 2, 7, 0
-    mov         r4, r4m         ; end_y
-    mov         r5, r5m         ; block_h
-%endif
-
-    ; start with vertical extend (top/bottom) and body pixel copy
-    mov      w_reg, r7m
-    sub      w_reg, r6m         ; w = start_x - end_x
-    sub         r5, r4
-%if ARCH_X86_64
-    sub         r4, r3
-%else
-    sub         r4, dword r3m
-%endif
-    cmp      w_reg, 22
-    jg .slow_v_extend_loop
-%if ARCH_X86_32
-    mov         r2, r2m         ; linesize
-%endif
-    sal      w_reg, 7           ; w * 128
-%ifdef PIC
-    lea        rax, [.emuedge_v_extend_1 - (.emuedge_v_extend_2 - .emuedge_v_extend_1)]
-    add      w_reg, rax
-%else
-    lea      w_reg, [.emuedge_v_extend_1 - (.emuedge_v_extend_2 - .emuedge_v_extend_1)+w_reg]
-%endif
-    call     w_reg              ; fast top extend, body copy and bottom extend
-.v_extend_end:
-
-    ; horizontal extend (left/right)
-    mov      w_reg, r6m         ; start_x
-    sub         r0, w_reg
-%if ARCH_X86_64
-    mov         r3, r0          ; backup of buf+block_h*linesize
-    mov         r5, r8
-%else
-    mov        r0m, r0          ; backup of buf+block_h*linesize
-    mov         r5, r5m
-%endif
-    test     w_reg, w_reg
-    jz .right_extend
-    cmp      w_reg, 22
-    jg .slow_left_extend_loop
-    mov         r1, w_reg
-    dec      w_reg
-    ; FIXME we can do a if size == 1 here if that makes any speed difference, test me
-    sar      w_reg, 1
-    sal      w_reg, 6
-    ; r0=buf+block_h*linesize,r7(64)/r6(32)=start_x offset for funcs
-    ; r6(rax)/r3(ebx)=val,r2=linesize,r1=start_x,r5=block_h
-%ifdef PIC
-    lea        rax, [.emuedge_extend_left_2]
-    add      w_reg, rax
-%else
-    lea      w_reg, [.emuedge_extend_left_2+w_reg]
-%endif
-    call     w_reg
-
-    ; now r3(64)/r0(32)=buf,r2=linesize,r8/r5=block_h,r6/r3=val, r7/r6=end_x, r1=block_w
-.right_extend:
-%if ARCH_X86_32
-    mov         r0, r0m
-    mov         r5, r5m
-%endif
-    mov      w_reg, r7m         ; end_x
-    mov         r1, r8m         ; block_w
-    mov         r4, r1
-    sub         r1, w_reg
-    jz .h_extend_end            ; if (end_x == block_w) goto h_extend_end
-    cmp         r1, 22
-    jg .slow_right_extend_loop
-    dec         r1
-    ; FIXME we can do a if size == 1 here if that makes any speed difference, test me
-    sar         r1, 1
-    sal         r1, 6
-%ifdef PIC
-    lea        rax, [.emuedge_extend_right_2]
-    add         r1, rax
-%else
-    lea         r1, [.emuedge_extend_right_2+r1]
-%endif
-    call        r1
-.h_extend_end:
-    RET
-
-%if ARCH_X86_64
-%define vall  al
-%define valh  ah
-%define valw  ax
-%define valw2 r7w
-%define valw3 r3w
-%if WIN64
-%define valw4 r7w
-%else ; unix64
-%define valw4 r3w
-%endif
-%define vald eax
-%else
-%define vall  bl
-%define valh  bh
-%define valw  bx
-%define valw2 r6w
-%define valw3 valw2
-%define valw4 valw3
-%define vald ebx
-%define stack_offset 0x14
-%endif
-
-%endmacro
-
-; macro to read/write a horizontal number of pixels (%2) to/from registers
-; on x86-64, - fills xmm0-15 for consecutive sets of 16 pixels
-;            - if (%2 & 15 == 8) fills the last 8 bytes into rax
-;            - else if (%2 & 8)  fills 8 bytes into mm0
-;            - if (%2 & 7 == 4)  fills the last 4 bytes into rax
-;            - else if (%2 & 4)  fills 4 bytes into mm0-1
-;            - if (%2 & 3 == 3)  fills 2 bytes into r7/r3, and 1 into eax
-;              (note that we're using r3 for body/bottom because it's a shorter
-;               opcode, and then the loop fits in 128 bytes)
-;            - else              fills remaining bytes into rax
-; on x86-32, - fills mm0-7 for consecutive sets of 8 pixels
-;            - if (%2 & 7 == 4)  fills 4 bytes into ebx
-;            - else if (%2 & 4)  fills 4 bytes into mm0-7
-;            - if (%2 & 3 == 3)  fills 2 bytes into r6, and 1 into ebx
-;            - else              fills remaining bytes into ebx
-; writing data out is in the same way
-%macro READ_NUM_BYTES 2
-%assign %%src_off 0 ; offset in source buffer
-%assign %%smidx   0 ; mmx register idx
-%assign %%sxidx   0 ; xmm register idx
-
-%if cpuflag(sse)
-%rep %2/16
-    movups xmm %+ %%sxidx, [r1+%%src_off]
-%assign %%src_off %%src_off+16
-%assign %%sxidx   %%sxidx+1
-%endrep ; %2/16
-%endif
-
-%if ARCH_X86_64
-%if (%2-%%src_off) == 8
-    mov           rax, [r1+%%src_off]
-%assign %%src_off %%src_off+8
-%endif ; (%2-%%src_off) == 8
-%endif ; x86-64
-
-%rep (%2-%%src_off)/8
-    movq    mm %+ %%smidx, [r1+%%src_off]
-%assign %%src_off %%src_off+8
-%assign %%smidx   %%smidx+1
-%endrep ; (%2-%%dst_off)/8
-
-%if (%2-%%src_off) == 4
-    mov          vald, [r1+%%src_off]
-%elif (%2-%%src_off) & 4
-    movd    mm %+ %%smidx, [r1+%%src_off]
-%assign %%src_off %%src_off+4
-%endif ; (%2-%%src_off) ==/& 4
-
-%if (%2-%%src_off) == 1
-    mov          vall, [r1+%%src_off]
-%elif (%2-%%src_off) == 2
-    mov          valw, [r1+%%src_off]
-%elif (%2-%%src_off) == 3
-%ifidn %1, top
-    mov         valw2, [r1+%%src_off]
-%elifidn %1, body
-    mov         valw3, [r1+%%src_off]
-%elifidn %1, bottom
-    mov         valw4, [r1+%%src_off]
-%endif ; %1 ==/!= top
-    mov          vall, [r1+%%src_off+2]
-%endif ; (%2-%%src_off) == 1/2/3
-%endmacro ; READ_NUM_BYTES
-
-%macro WRITE_NUM_BYTES 2
-%assign %%dst_off 0 ; offset in destination buffer
-%assign %%dmidx   0 ; mmx register idx
-%assign %%dxidx   0 ; xmm register idx
-
-%if cpuflag(sse)
-%rep %2/16
-    movups [r0+%%dst_off], xmm %+ %%dxidx
-%assign %%dst_off %%dst_off+16
-%assign %%dxidx   %%dxidx+1
-%endrep ; %2/16
-%endif
-
-%if ARCH_X86_64
-%if (%2-%%dst_off) == 8
-    mov    [r0+%%dst_off], rax
-%assign %%dst_off %%dst_off+8
-%endif ; (%2-%%dst_off) == 8
-%endif ; x86-64
-
-%rep (%2-%%dst_off)/8
-    movq   [r0+%%dst_off], mm %+ %%dmidx
-%assign %%dst_off %%dst_off+8
-%assign %%dmidx   %%dmidx+1
-%endrep ; (%2-%%dst_off)/8
-
-%if (%2-%%dst_off) == 4
-    mov    [r0+%%dst_off], vald
-%elif (%2-%%dst_off) & 4
-    movd   [r0+%%dst_off], mm %+ %%dmidx
-%assign %%dst_off %%dst_off+4
-%endif ; (%2-%%dst_off) ==/& 4
-
-%if (%2-%%dst_off) == 1
-    mov    [r0+%%dst_off], vall
-%elif (%2-%%dst_off) == 2
-    mov    [r0+%%dst_off], valw
-%elif (%2-%%dst_off) == 3
-%ifidn %1, top
-    mov    [r0+%%dst_off], valw2
-%elifidn %1, body
-    mov    [r0+%%dst_off], valw3
-%elifidn %1, bottom
-    mov    [r0+%%dst_off], valw4
-%endif ; %1 ==/!= top
-    mov  [r0+%%dst_off+2], vall
-%endif ; (%2-%%dst_off) == 1/2/3
-%endmacro ; WRITE_NUM_BYTES
-
-; vertical top/bottom extend and body copy fast loops
-; these are function pointers to set-width line copy functions, i.e.
-; they read a fixed number of pixels into set registers, and write
-; those out into the destination buffer
-; r0=buf,r1=src,r2=linesize,r3(64)/r3m(32)=start_x,r4=end_y,r5=block_h
-; r6(eax/64)/r3(ebx/32)=val_reg
-%macro VERTICAL_EXTEND 0
-%assign %%n 1
-%rep 22
-ALIGN 128
-.emuedge_v_extend_ %+ %%n:
-    ; extend pixels above body
-%if ARCH_X86_64
-    test           r3 , r3                   ; if (!start_y)
-    jz .emuedge_copy_body_ %+ %%n %+ _loop   ;   goto body
-%else ; ARCH_X86_32
-    cmp      dword r3m, 0
-    je .emuedge_copy_body_ %+ %%n %+ _loop
-%endif ; ARCH_X86_64/32
-    READ_NUM_BYTES  top,    %%n              ; read bytes
-.emuedge_extend_top_ %+ %%n %+ _loop:        ; do {
-    WRITE_NUM_BYTES top,    %%n              ;   write bytes
-    add            r0 , r2                   ;   dst += linesize
-%if ARCH_X86_64
-    dec            r3d
-%else ; ARCH_X86_32
-    dec      dword r3m
-%endif ; ARCH_X86_64/32
-    jnz .emuedge_extend_top_ %+ %%n %+ _loop ; } while (--start_y)
-
-    ; copy body pixels
-.emuedge_copy_body_ %+ %%n %+ _loop:         ; do {
-    READ_NUM_BYTES  body,   %%n              ;   read bytes
-    WRITE_NUM_BYTES body,   %%n              ;   write bytes
-    add            r0 , r2                   ;   dst += linesize
-    add            r1 , r2                   ;   src += linesize
-    dec            r4d
-    jnz .emuedge_copy_body_ %+ %%n %+ _loop  ; } while (--end_y)
-
-    ; copy bottom pixels
-    test           r5 , r5                   ; if (!block_h)
-    jz .emuedge_v_extend_end_ %+ %%n         ;   goto end
-    sub            r1 , r2                   ; src -= linesize
-    READ_NUM_BYTES  bottom, %%n              ; read bytes
-.emuedge_extend_bottom_ %+ %%n %+ _loop:     ; do {
-    WRITE_NUM_BYTES bottom, %%n              ;   write bytes
-    add            r0 , r2                   ;   dst += linesize
-    dec            r5d
-    jnz .emuedge_extend_bottom_ %+ %%n %+ _loop ; } while (--block_h)
-
-.emuedge_v_extend_end_ %+ %%n:
-%if ARCH_X86_64
-    ret
-%else ; ARCH_X86_32
-    rep ret
-%endif ; ARCH_X86_64/32
-%assign %%n %%n+1
-%endrep
-%endmacro VERTICAL_EXTEND
-
-; left/right (horizontal) fast extend functions
-; these are essentially identical to the vertical extend ones above,
-; just left/right separated because number of pixels to extend is
-; obviously not the same on both sides.
-; for reading, pixels are placed in eax (x86-64) or ebx (x86-64) in the
-; lowest two bytes of the register (so val*0x0101), and are splatted
-; into each byte of mm0 as well if n_pixels >= 8
-
-%macro READ_V_PIXEL 2
-    mov        vall, %2
-    mov        valh, vall
-%if %1 >= 8
-    movd        mm0, vald
-%if cpuflag(mmxext)
-    pshufw      mm0, mm0, 0
-%else ; mmx
-    punpcklwd   mm0, mm0
-    punpckldq   mm0, mm0
-%endif ; sse
-%endif ; %1 >= 8
-%endmacro
-
-%macro WRITE_V_PIXEL 2
-%assign %%dst_off 0
-%rep %1/8
-    movq [%2+%%dst_off], mm0
-%assign %%dst_off %%dst_off+8
-%endrep
-%if %1 & 4
-%if %1 >= 8
-    movd [%2+%%dst_off], mm0
-%else ; %1 < 8
-    mov  [%2+%%dst_off]  , valw
-    mov  [%2+%%dst_off+2], valw
-%endif ; %1 >=/< 8
-%assign %%dst_off %%dst_off+4
-%endif ; %1 & 4
-%if %1&2
-    mov  [%2+%%dst_off], valw
-%endif ; %1 & 2
-%endmacro
-
-; r0=buf+block_h*linesize, r1=start_x, r2=linesize, r5=block_h, r6/r3=val
-%macro LEFT_EXTEND 0
-%assign %%n 2
-%rep 11
-ALIGN 64
-.emuedge_extend_left_ %+ %%n:          ; do {
-    sub         r0, r2                 ;   dst -= linesize
-    READ_V_PIXEL  %%n, [r0+r1]         ;   read pixels
-    WRITE_V_PIXEL %%n, r0              ;   write pixels
-    dec         r5
-    jnz .emuedge_extend_left_ %+ %%n   ; } while (--block_h)
-%if ARCH_X86_64
-    ret
-%else ; ARCH_X86_32
-    rep ret
-%endif ; ARCH_X86_64/32
-%assign %%n %%n+2
-%endrep
-%endmacro ; LEFT_EXTEND
-
-; r3/r0=buf+block_h*linesize, r2=linesize, r8/r5=block_h, r0/r6=end_x, r6/r3=val
-%macro RIGHT_EXTEND 0
-%assign %%n 2
-%rep 11
-ALIGN 64
-.emuedge_extend_right_ %+ %%n:          ; do {
-%if ARCH_X86_64
-    sub        r3, r2                   ;   dst -= linesize
-    READ_V_PIXEL  %%n, [r3+w_reg-1]     ;   read pixels
-    WRITE_V_PIXEL %%n, r3+r4-%%n        ;   write pixels
-    dec       r8
-%else ; ARCH_X86_32
-    sub        r0, r2                   ;   dst -= linesize
-    READ_V_PIXEL  %%n, [r0+w_reg-1]     ;   read pixels
-    WRITE_V_PIXEL %%n, r0+r4-%%n        ;   write pixels
-    dec     r5
-%endif ; ARCH_X86_64/32
-    jnz .emuedge_extend_right_ %+ %%n   ; } while (--block_h)
-%if ARCH_X86_64
-    ret
-%else ; ARCH_X86_32
-    rep ret
-%endif ; ARCH_X86_64/32
-%assign %%n %%n+2
-%endrep
-
-%if ARCH_X86_32
-%define stack_offset 0x10
-%endif
-%endmacro ; RIGHT_EXTEND
-
-; below follow the "slow" copy/extend functions, these act on a non-fixed
-; width specified in a register, and run a loop to copy the full amount
-; of bytes. They are optimized for copying of large amounts of pixels per
-; line, so they unconditionally splat data into mm registers to copy 8
-; bytes per loop iteration. It could be considered to use xmm for x86-64
-; also, but I haven't optimized this as much (i.e. FIXME)
-%macro V_COPY_NPX 4-5
-%if %0 == 4
-    test     w_reg, %4
-    jz .%1_skip_%4_px
-%else ; %0 == 5
-.%1_%4_px_loop:
-%endif
-    %3          %2, [r1+cnt_reg]
-    %3 [r0+cnt_reg], %2
-    add    cnt_reg, %4
-%if %0 == 5
-    sub      w_reg, %4
-    test     w_reg, %5
-    jnz .%1_%4_px_loop
-%endif
-.%1_skip_%4_px:
-%endmacro
-
-%macro V_COPY_ROW 2
-%ifidn %1, bottom
-    sub         r1, linesize
-%endif
-.%1_copy_loop:
-    xor    cnt_reg, cnt_reg
-%if notcpuflag(sse)
-%define linesize r2m
-    V_COPY_NPX %1,  mm0, movq,    8, 0xFFFFFFF8
-%else ; sse
-    V_COPY_NPX %1, xmm0, movups, 16, 0xFFFFFFF0
-%if ARCH_X86_64
-%define linesize r2
-    V_COPY_NPX %1, rax , mov,     8
-%else ; ARCH_X86_32
-%define linesize r2m
-    V_COPY_NPX %1,  mm0, movq,    8
-%endif ; ARCH_X86_64/32
-%endif ; sse
-    V_COPY_NPX %1, vald, mov,     4
-    V_COPY_NPX %1, valw, mov,     2
-    V_COPY_NPX %1, vall, mov,     1
-    mov      w_reg, cnt_reg
-%ifidn %1, body
-    add         r1, linesize
-%endif
-    add         r0, linesize
-    dec         %2
-    jnz .%1_copy_loop
-%endmacro
-
-%macro SLOW_V_EXTEND 0
-.slow_v_extend_loop:
-; r0=buf,r1=src,r2(64)/r2m(32)=linesize,r3(64)/r3m(32)=start_x,r4=end_y,r5=block_h
-; r8(64)/r3(later-64)/r2(32)=cnt_reg,r6(64)/r3(32)=val_reg,r7(64)/r6(32)=w=end_x-start_x
-%if ARCH_X86_64
-    push        r8              ; save old value of block_h
-    test        r3, r3
-%define cnt_reg r8
-    jz .do_body_copy            ; if (!start_y) goto do_body_copy
-    V_COPY_ROW top, r3
-%else
-    cmp  dword r3m, 0
-%define cnt_reg r2
-    je .do_body_copy            ; if (!start_y) goto do_body_copy
-    V_COPY_ROW top, dword r3m
-%endif
-
-.do_body_copy:
-    V_COPY_ROW body, r4
-
-%if ARCH_X86_64
-    pop         r8              ; restore old value of block_h
-%define cnt_reg r3
-%endif
-    test        r5, r5
-%if ARCH_X86_64
-    jz .v_extend_end
-%else
-    jz .skip_bottom_extend
-%endif
-    V_COPY_ROW bottom, r5
-%if ARCH_X86_32
-.skip_bottom_extend:
-    mov         r2, r2m
-%endif
-    jmp .v_extend_end
-%endmacro
-
-%macro SLOW_LEFT_EXTEND 0
-.slow_left_extend_loop:
-; r0=buf+block_h*linesize,r2=linesize,r6(64)/r3(32)=val,r5=block_h,r4=cntr,r7/r6=start_x
-    mov         r4, 8
-    sub         r0, linesize
-    READ_V_PIXEL 8, [r0+w_reg]
-.left_extend_8px_loop:
-    movq [r0+r4-8], mm0
-    add         r4, 8
-    cmp         r4, w_reg
-    jle .left_extend_8px_loop
-    sub         r4, 8
-    cmp         r4, w_reg
-    jge .left_extend_loop_end
-.left_extend_2px_loop:
-    mov    [r0+r4], valw
-    add         r4, 2
-    cmp         r4, w_reg
-    jl .left_extend_2px_loop
-.left_extend_loop_end:
-    dec         r5
-    jnz .slow_left_extend_loop
-%if ARCH_X86_32
-    mov         r2, r2m
-%endif
-    jmp .right_extend
-%endmacro
-
-%macro SLOW_RIGHT_EXTEND 0
-.slow_right_extend_loop:
-; r3(64)/r0(32)=buf+block_h*linesize,r2=linesize,r4=block_w,r8(64)/r5(32)=block_h,
-; r7(64)/r6(32)=end_x,r6/r3=val,r1=cntr
-%if ARCH_X86_64
-%define buf_reg r3
-%define bh_reg r8
-%else
-%define buf_reg r0
-%define bh_reg r5
-%endif
-    lea         r1, [r4-8]
-    sub    buf_reg, linesize
-    READ_V_PIXEL 8, [buf_reg+w_reg-1]
-.right_extend_8px_loop:
-    movq [buf_reg+r1], mm0
-    sub         r1, 8
-    cmp         r1, w_reg
-    jge .right_extend_8px_loop
-    add         r1, 8
-    cmp         r1, w_reg
-    je .right_extend_loop_end
-.right_extend_2px_loop:
-    sub         r1, 2
-    mov [buf_reg+r1], valw
-    cmp         r1, w_reg
-    jg .right_extend_2px_loop
-.right_extend_loop_end:
-    dec         bh_reg
-    jnz .slow_right_extend_loop
-    jmp .h_extend_end
-%endmacro
-
-%macro emu_edge 1
-INIT_XMM %1
-EMU_EDGE_FUNC
-VERTICAL_EXTEND
-LEFT_EXTEND
-RIGHT_EXTEND
-SLOW_V_EXTEND
-SLOW_LEFT_EXTEND
-SLOW_RIGHT_EXTEND
-%endmacro
-
-emu_edge sse
-%if ARCH_X86_32
-emu_edge mmx
-%endif
-
 ;-----------------------------------------------------------------------------
 ; void ff_vector_clip_int32(int32_t *dst, const int32_t *src, int32_t min,
 ;                           int32_t max, unsigned int len)