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