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FFmpeg/libavcodec/x86/cavsidct.asm
Ronald S. Bultje 2f0591cfa3 cavs: add a sse2 idct implementation. 
This makes using the function pointer ff_add_pixels_clamped() unnecessary,
since we always know what the best implementation is at compile-time.
2017-04-06 10:03:28 -04:00

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6.8 KiB
NASM
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; Chinese AVS video (AVS1-P2, JiZhun profile) decoder
; Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de>
;
; MMX-optimized DSP functions, based on H.264 optimizations by
; Michael Niedermayer and Loren Merritt
; Conversion from gcc syntax to x264asm syntax with modifications
; by Ronald S. Bultje <rsbultje@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_4
cextern pw_64
SECTION .text
%macro CAVS_IDCT8_1D 2-3 1 ; source, round, init_load
%if %3 == 1
mova m4, [%1+7*16] ; m4 = src7
mova m5, [%1+1*16] ; m5 = src1
mova m2, [%1+5*16] ; m2 = src5
mova m7, [%1+3*16] ; m7 = src3
%else
SWAP 1, 7
SWAP 4, 6
%endif
mova m0, m4
mova m3, m5
mova m6, m2
mova m1, m7
paddw m4, m4 ; m4 = 2*src7
paddw m3, m3 ; m3 = 2*src1
paddw m6, m6 ; m6 = 2*src5
paddw m1, m1 ; m1 = 2*src3
paddw m0, m4 ; m0 = 3*src7
paddw m5, m3 ; m5 = 3*src1
paddw m2, m6 ; m2 = 3*src5
paddw m7, m1 ; m7 = 3*src3
psubw m5, m4 ; m5 = 3*src1 - 2*src7 = a0
paddw m7, m6 ; m7 = 3*src3 - 2*src5 = a1
psubw m1, m2 ; m1 = 2*src3 - 3*src5 = a2
paddw m3, m0 ; m3 = 2*src1 - 3*src7 = a3
mova m4, m5
mova m6, m7
mova m0, m3
mova m2, m1
SUMSUB_BA w, 7, 5 ; m7 = a0 + a1, m5 = a0 - a1
paddw m7, m3 ; m7 = a0 + a1 + a3
paddw m5, m1 ; m5 = a0 - a1 + a2
paddw m7, m7
paddw m5, m5
paddw m7, m6 ; m7 = b4
paddw m5, m4 ; m5 = b5
SUMSUB_BA w, 1, 3 ; m1 = a3 + a2, m3 = a3 - a2
psubw m4, m1 ; m4 = a0 - a2 - a3
mova m1, m4 ; m1 = a0 - a2 - a3
psubw m3, m6 ; m3 = a3 - a2 - a1
paddw m1, m1
paddw m3, m3
psubw m1, m2 ; m1 = b7
paddw m3, m0 ; m3 = b6
mova m2, [%1+2*16] ; m2 = src2
mova m6, [%1+6*16] ; m6 = src6
mova m4, m2
mova m0, m6
psllw m4, 2 ; m4 = 4*src2
psllw m6, 2 ; m6 = 4*src6
paddw m2, m4 ; m2 = 5*src2
paddw m0, m6 ; m0 = 5*src6
paddw m2, m2
paddw m0, m0
psubw m4, m0 ; m4 = 4*src2 - 10*src6 = a7
paddw m6, m2 ; m6 = 4*src6 + 10*src2 = a6
mova m2, [%1+0*16] ; m2 = src0
mova m0, [%1+4*16] ; m0 = src4
SUMSUB_BA w, 0, 2 ; m0 = src0 + src4, m2 = src0 - src4
psllw m0, 3
psllw m2, 3
paddw m0, %2 ; add rounding bias
paddw m2, %2 ; add rounding bias
SUMSUB_BA w, 6, 0 ; m6 = a4 + a6, m0 = a4 - a6
SUMSUB_BA w, 4, 2 ; m4 = a5 + a7, m2 = a5 - a7
SUMSUB_BA w, 7, 6 ; m7 = dst0, m6 = dst7
SUMSUB_BA w, 5, 4 ; m5 = dst1, m4 = dst6
SUMSUB_BA w, 3, 2 ; m3 = dst2, m2 = dst5
SUMSUB_BA w, 1, 0 ; m1 = dst3, m0 = dst4
%endmacro
INIT_MMX mmx
cglobal cavs_idct8, 2, 4, 8, 8 * 16, out, in, cnt, tmp
mov cntd, 2
mov tmpq, rsp
.loop_1:
CAVS_IDCT8_1D inq, [pw_4]
psraw m7, 3
psraw m6, 3
psraw m5, 3
psraw m4, 3
psraw m3, 3
psraw m2, 3
psraw m1, 3
psraw m0, 3
mova [tmpq], m7
TRANSPOSE4x4W 0, 2, 4, 6, 7
mova [tmpq+1*8], m0
mova [tmpq+3*8], m2
mova [tmpq+5*8], m4
mova [tmpq+7*8], m6
mova m7, [tmpq]
TRANSPOSE4x4W 7, 5, 3, 1, 0
mova [tmpq+0*8], m7
mova [tmpq+2*8], m5
mova [tmpq+4*8], m3
mova [tmpq+6*8], m1
add inq, mmsize
add tmpq, 64
dec cntd
jg .loop_1
mov cntd, 2
mov tmpq, rsp
.loop_2:
CAVS_IDCT8_1D tmpq, [pw_64]
psraw m7, 7
psraw m6, 7
psraw m5, 7
psraw m4, 7
psraw m3, 7
psraw m2, 7
psraw m1, 7
psraw m0, 7
mova [outq+0*16], m7
mova [outq+1*16], m5
mova [outq+2*16], m3
mova [outq+3*16], m1
mova [outq+4*16], m0
mova [outq+5*16], m2
mova [outq+6*16], m4
mova [outq+7*16], m6
add outq, mmsize
add tmpq, mmsize
dec cntd
jg .loop_2
RET
INIT_XMM sse2
cglobal cavs_idct8, 2, 2, 8 + ARCH_X86_64, 0 - 8 * 16, out, in
CAVS_IDCT8_1D inq, [pw_4]
psraw m7, 3
psraw m6, 3
psraw m5, 3
psraw m4, 3
psraw m3, 3
psraw m2, 3
psraw m1, 3
psraw m0, 3
%if ARCH_X86_64
TRANSPOSE8x8W 7, 5, 3, 1, 0, 2, 4, 6, 8
mova [rsp+4*16], m0
%else
mova [rsp+0*16], m4
TRANSPOSE8x8W 7, 5, 3, 1, 0, 2, 4, 6, [rsp+0*16], [rsp+4*16], 1
%endif
mova [rsp+0*16], m7
mova [rsp+2*16], m3
mova [rsp+6*16], m4
CAVS_IDCT8_1D rsp, [pw_64], 0
psraw m7, 7
psraw m6, 7
psraw m5, 7
psraw m4, 7
psraw m3, 7
psraw m2, 7
psraw m1, 7
psraw m0, 7
mova [outq+0*16], m7
mova [outq+1*16], m5
mova [outq+2*16], m3
mova [outq+3*16], m1
mova [outq+4*16], m0
mova [outq+5*16], m2
mova [outq+6*16], m4
mova [outq+7*16], m6
RET
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