mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
148 lines
4.4 KiB
NASM
148 lines
4.4 KiB
NASM
;************************************************************************
|
|
;* SIMD-optimized HuffYUV encoding functions
|
|
;* Copyright (c) 2000, 2001 Fabrice Bellard
|
|
;* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
|
|
;*
|
|
;* MMX optimization by Nick Kurshev <nickols_k@mail.ru>
|
|
;* Conversion to NASM format by Tiancheng "Timothy" Gu <timothygu99@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
|
|
;* 51, Inc., Foundation Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
;******************************************************************************
|
|
|
|
%include "libavutil/x86/x86util.asm"
|
|
|
|
section .text
|
|
|
|
; void ff_diff_bytes(uint8_t *dst, const uint8_t *src1, const uint8_t *src2,
|
|
; intptr_t w);
|
|
%macro DIFF_BYTES_PROLOGUE 0
|
|
%if ARCH_X86_32
|
|
cglobal diff_bytes, 3,5,2, dst, src1, src2
|
|
%define wq r4q
|
|
DECLARE_REG_TMP 3
|
|
mov wq, r3mp
|
|
%else
|
|
cglobal diff_bytes, 4,5,2, dst, src1, src2, w
|
|
DECLARE_REG_TMP 4
|
|
%endif ; ARCH_X86_32
|
|
%define i t0q
|
|
%endmacro
|
|
|
|
; label to jump to if w < regsize
|
|
%macro DIFF_BYTES_LOOP_PREP 1
|
|
mov i, wq
|
|
and i, -2 * regsize
|
|
jz %1
|
|
add dstq, i
|
|
add src1q, i
|
|
add src2q, i
|
|
neg i
|
|
%endmacro
|
|
|
|
; mov type used for src1q, dstq, first reg, second reg
|
|
%macro DIFF_BYTES_LOOP_CORE 4
|
|
%if mmsize != 16
|
|
mov%1 %3, [src1q + i]
|
|
mov%1 %4, [src1q + i + regsize]
|
|
psubb %3, [src2q + i]
|
|
psubb %4, [src2q + i + regsize]
|
|
mov%2 [dstq + i], %3
|
|
mov%2 [regsize + dstq + i], %4
|
|
%else
|
|
; SSE enforces alignment of psubb operand
|
|
mov%1 %3, [src1q + i]
|
|
movu %4, [src2q + i]
|
|
psubb %3, %4
|
|
mov%2 [dstq + i], %3
|
|
mov%1 %3, [src1q + i + regsize]
|
|
movu %4, [src2q + i + regsize]
|
|
psubb %3, %4
|
|
mov%2 [regsize + dstq + i], %3
|
|
%endif
|
|
%endmacro
|
|
|
|
%macro DIFF_BYTES_BODY 2 ; mov type used for src1q, for dstq
|
|
%define regsize mmsize
|
|
.loop_%1%2:
|
|
DIFF_BYTES_LOOP_CORE %1, %2, m0, m1
|
|
add i, 2 * regsize
|
|
jl .loop_%1%2
|
|
.skip_main_%1%2:
|
|
and wq, 2 * regsize - 1
|
|
jz .end_%1%2
|
|
%if mmsize > 16
|
|
; fall back to narrower xmm
|
|
%define regsize mmsize / 2
|
|
DIFF_BYTES_LOOP_PREP .setup_loop_gpr_aa
|
|
.loop2_%1%2:
|
|
DIFF_BYTES_LOOP_CORE %1, %2, xm0, xm1
|
|
add i, 2 * regsize
|
|
jl .loop2_%1%2
|
|
.setup_loop_gpr_%1%2:
|
|
and wq, 2 * regsize - 1
|
|
jz .end_%1%2
|
|
%endif
|
|
add dstq, wq
|
|
add src1q, wq
|
|
add src2q, wq
|
|
neg wq
|
|
.loop_gpr_%1%2:
|
|
mov t0b, [src1q + wq]
|
|
sub t0b, [src2q + wq]
|
|
mov [dstq + wq], t0b
|
|
inc wq
|
|
jl .loop_gpr_%1%2
|
|
.end_%1%2:
|
|
REP_RET
|
|
%endmacro
|
|
|
|
%if ARCH_X86_32
|
|
INIT_MMX mmx
|
|
DIFF_BYTES_PROLOGUE
|
|
%define regsize mmsize
|
|
DIFF_BYTES_LOOP_PREP .skip_main_aa
|
|
DIFF_BYTES_BODY a, a
|
|
%endif
|
|
|
|
INIT_XMM sse2
|
|
DIFF_BYTES_PROLOGUE
|
|
%define regsize mmsize
|
|
DIFF_BYTES_LOOP_PREP .skip_main_aa
|
|
test dstq, regsize - 1
|
|
jnz .loop_uu
|
|
test src1q, regsize - 1
|
|
jnz .loop_ua
|
|
DIFF_BYTES_BODY a, a
|
|
DIFF_BYTES_BODY u, a
|
|
DIFF_BYTES_BODY u, u
|
|
|
|
%if HAVE_AVX2_EXTERNAL
|
|
INIT_YMM avx2
|
|
DIFF_BYTES_PROLOGUE
|
|
%define regsize mmsize
|
|
; Directly using unaligned SSE2 version is marginally faster than
|
|
; branching based on arguments.
|
|
DIFF_BYTES_LOOP_PREP .skip_main_uu
|
|
test dstq, regsize - 1
|
|
jnz .loop_uu
|
|
test src1q, regsize - 1
|
|
jnz .loop_ua
|
|
DIFF_BYTES_BODY a, a
|
|
DIFF_BYTES_BODY u, a
|
|
DIFF_BYTES_BODY u, u
|
|
%endif
|