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;******************************************************************************
;* MMX/SSE2-optimized functions for the VP6 decoder
;* Copyright (C) 2009 Sebastien Lucas <sebastien.lucas@gmail.com>
;* Copyright (C) 2009 Zuxy Meng <zuxy.meng@gmail.com>
;*
;* This file is part of FFmpeg.
;*
;* FFmpeg is free software; you can redistribute it and/or
;* modify it under the terms of the GNU Lesser General Public
;* License as published by the Free Software Foundation; either
;* version 2.1 of the License, or (at your option) any later version.
;*
;* FFmpeg is distributed in the hope that it will be useful,
;* but WITHOUT ANY WARRANTY; without even the implied warranty of
;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;* Lesser General Public License for more details.
;*
;* You should have received a copy of the GNU Lesser General Public
;* License along with FFmpeg; if not, write to the Free Software
;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
;******************************************************************************
%include "libavutil/x86/x86util.asm"
cextern pw_64
SECTION .text
%macro DIAG4 6
movq m0, [%1+%2]
movq m1, [%1+%3]
punpcklbw m0, m7
punpcklbw m1, m7
pmullw m0, m4 ; src[x-8 ] * biweight [0]
pmullw m1, m5 ; src[x ] * biweight [1]
paddw m0, m1
movq m1, [%1+%4]
movq m2, [%1+%5]
punpcklbw m1, m7
punpcklbw m2, m7
pmullw m1, m6 ; src[x+8 ] * biweight [2]
pmullw m2, m3 ; src[x+16] * biweight [3]
paddw m1, m2
paddsw m0, m1
paddsw m0, [pw_64] ; Add 64
psraw m0, 7
packuswb m0, m0
movq [%6], m0
%endmacro
%macro SPLAT4REGS 0
pshuflw m4, m3, 0x0
pshuflw m5, m3, 0x55
pshuflw m6, m3, 0xAA
pshuflw m3, m3, 0xFF
punpcklqdq m4, m4
punpcklqdq m5, m5
punpcklqdq m6, m6
punpcklqdq m3, m3
%endmacro
; void ff_vp6_filter_diag4_<opt>(uint8_t *dst, uint8_t *src, ptrdiff_t stride,
; const int16_t h_weight[4], const int16_t v_weights[4])
INIT_XMM sse2
cglobal vp6_filter_diag4, 5, 7, 8
mov r5, rsp ; backup stack pointer
and rsp, ~(mmsize-1) ; align stack
sub rsp, 8*11
sub r1, r2
pxor m7, m7
movq m3, [r3]
SPLAT4REGS
mov r3, rsp
mov r6, 11
.nextrow:
DIAG4 r1, -1, 0, 1, 2, r3
add r3, 8
add r1, r2
dec r6
jnz .nextrow
movq m3, [r4]
SPLAT4REGS
lea r3, [rsp+8]
mov r6, 8
.nextcol:
DIAG4 r3, -8, 0, 8, 16, r0
add r3, 8
add r0, r2
dec r6
jnz .nextcol
mov rsp, r5 ; restore stack pointer
RET
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