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n9.1-dev
libswscale/x86/scale.asm
379 строк
13 KB
Andreas Rheinhardt
swscale/x86/scale: Remove always-false mmsize checks
13 апр 2026, 09:46
13 апр 2026, 09:46
f5c5bca
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;****************************************************************************** ;* x86-optimized horizontal line scaling functions ;* Copyright (c) 2011 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" SECTION_RODATA max_19bit_int: times 4 dd 0x7ffff minshort: times 8 dw 0x8000 unicoeff: times 4 dd 0x20000000 SECTION .text ;----------------------------------------------------------------------------- ; horizontal line scaling ; ; void hscale<source_width>to<intermediate_nbits>_<filterSize>_<opt> ; (SwsInternal *c, int{16,32}_t *dst, ; int dstW, const uint{8,16}_t *src, ; const int16_t *filter, ; const int32_t *filterPos, int filterSize); ; ; Scale one horizontal line. Input is either 8-bit width or 16-bit width ; ($source_width can be either 8, 9, 10 or 16, difference is whether we have to ; downscale before multiplying). Filter is 14 bits. Output is either 15 bits ; (in int16_t) or 19 bits (in int32_t), as given in $intermediate_nbits. Each ; output pixel is generated from $filterSize input pixels, the position of ; the first pixel is given in filterPos[nOutputPixel]. ;----------------------------------------------------------------------------- ; SCALE_FUNC source_width, intermediate_nbits, filtersize, filtersuffix, n_args, n_xmm %macro SCALE_FUNC 6 %ifnidn %3, X cglobal hscale%1to%2_%4, %5, 7, %6, pos0, dst, w, src, filter, fltpos, pos1 %else cglobal hscale%1to%2_%4, %5, 10, %6, pos0, dst, w, srcmem, filter, fltpos, fltsize %endif %if ARCH_X86_64 movsxd wq, wd %define mov32 movsxd %else ; x86-32 %define mov32 mov %endif ; x86-64 %if %2 == 19 mova m2, [max_19bit_int] %endif ; %2 == 19 %if %1 == 16 mova m6, [minshort] mova m7, [unicoeff] %elif %1 == 8 pxor m3, m3 %endif ; %1 == 8/16 %if %1 == 8 %define movlh movd %define movbh movh %define srcmul 1 %else ; %1 == 9-16 %define movlh movq %define movbh movu %define srcmul 2 %endif ; %1 == 8/9-16 %ifnidn %3, X ; setup loop %if %3 == 8 shl wq, 1 ; this allows *16 (i.e. now *8) in lea instructions for the 8-tap filter %define wshr 1 %else ; %3 == 4 %define wshr 0 %endif ; %3 == 8 lea filterq, [filterq+wq*8] %if %2 == 15 lea dstq, [dstq+wq*(2>>wshr)] %else ; %2 == 19 lea dstq, [dstq+wq*(4>>wshr)] %endif ; %2 == 15/19 lea fltposq, [fltposq+wq*(4>>wshr)] neg wq .loop: %if %3 == 4 ; filterSize == 4 scaling ; load 2x4 or 4x4 source pixels into m0/m1 mov32 pos0q, dword [fltposq+wq*4+ 0] ; filterPos[0] mov32 pos1q, dword [fltposq+wq*4+ 4] ; filterPos[1] movlh m0, [srcq+pos0q*srcmul] ; src[filterPos[0] + {0,1,2,3}] %if %1 > 8 movhps m0, [srcq+pos1q*srcmul] ; src[filterPos[1] + {0,1,2,3}] %else ; %1 == 8 movd m4, [srcq+pos1q*srcmul] ; src[filterPos[1] + {0,1,2,3}] %endif mov32 pos0q, dword [fltposq+wq*4+ 8] ; filterPos[2] mov32 pos1q, dword [fltposq+wq*4+12] ; filterPos[3] movlh m1, [srcq+pos0q*srcmul] ; src[filterPos[2] + {0,1,2,3}] %if %1 > 8 movhps m1, [srcq+pos1q*srcmul] ; src[filterPos[3] + {0,1,2,3}] %else ; %1 == 8 movd m5, [srcq+pos1q*srcmul] ; src[filterPos[3] + {0,1,2,3}] punpckldq m0, m4 punpckldq m1, m5 %endif ; %1 == 8 %if %1 == 8 punpcklbw m0, m3 ; byte -> word punpcklbw m1, m3 ; byte -> word %endif ; %1 == 8 ; multiply with filter coefficients %if %1 == 16 ; pmaddwd needs signed adds, so this moves unsigned -> signed, we'll ; add back 0x8000 * sum(coeffs) after the horizontal add psubw m0, m6 psubw m1, m6 %endif ; %1 == 16 pmaddwd m0, [filterq+wq*8+mmsize*0] ; *= filter[{0,1,..,6,7}] pmaddwd m1, [filterq+wq*8+mmsize*1] ; *= filter[{8,9,..,14,15}] ; add up horizontally (4 srcpix * 4 coefficients -> 1 dstpix) %if notcpuflag(ssse3) ; sse2 mova m4, m0 shufps m0, m1, 10001000b shufps m4, m1, 11011101b paddd m0, m4 %else ; ssse3/sse4 phaddd m0, m1 ; filter[{ 0, 1, 2, 3}]*src[filterPos[0]+{0,1,2,3}], ; filter[{ 4, 5, 6, 7}]*src[filterPos[1]+{0,1,2,3}], ; filter[{ 8, 9,10,11}]*src[filterPos[2]+{0,1,2,3}], ; filter[{12,13,14,15}]*src[filterPos[3]+{0,1,2,3}] %endif ; sse2/ssse3/sse4 %else ; %3 == 8, i.e. filterSize == 8 scaling ; load 2x8 or 4x8 source pixels into m0, m1, m4 and m5 mov32 pos0q, dword [fltposq+wq*2+0] ; filterPos[0] mov32 pos1q, dword [fltposq+wq*2+4] ; filterPos[1] movbh m0, [srcq+ pos0q *srcmul] ; src[filterPos[0] + {0,1,2,3,4,5,6,7}] movbh m1, [srcq+ pos1q *srcmul] ; src[filterPos[1] + {0,1,2,3,4,5,6,7}] mov32 pos0q, dword [fltposq+wq*2+8] ; filterPos[2] mov32 pos1q, dword [fltposq+wq*2+12] ; filterPos[3] movbh m4, [srcq+ pos0q *srcmul] ; src[filterPos[2] + {0,1,2,3,4,5,6,7}] movbh m5, [srcq+ pos1q *srcmul] ; src[filterPos[3] + {0,1,2,3,4,5,6,7}] %if %1 == 8 punpcklbw m0, m3 ; byte -> word punpcklbw m1, m3 ; byte -> word punpcklbw m4, m3 ; byte -> word punpcklbw m5, m3 ; byte -> word %endif ; %1 == 8 ; multiply %if %1 == 16 ; pmaddwd needs signed adds, so this moves unsigned -> signed, we'll ; add back 0x8000 * sum(coeffs) after the horizontal add psubw m0, m6 psubw m1, m6 psubw m4, m6 psubw m5, m6 %endif ; %1 == 16 pmaddwd m0, [filterq+wq*8+mmsize*0] ; *= filter[{0,1,..,6,7}] pmaddwd m1, [filterq+wq*8+mmsize*1] ; *= filter[{8,9,..,14,15}] pmaddwd m4, [filterq+wq*8+mmsize*2] ; *= filter[{16,17,..,22,23}] pmaddwd m5, [filterq+wq*8+mmsize*3] ; *= filter[{24,25,..,30,31}] ; add up horizontally (8 srcpix * 8 coefficients -> 1 dstpix) %if notcpuflag(ssse3) ; sse2 %if %1 == 8 %define mex m6 %else %define mex m3 %endif ; emulate horizontal add as transpose + vertical add mova mex, m0 punpckldq m0, m1 punpckhdq mex, m1 paddd m0, mex mova m1, m4 punpckldq m4, m5 punpckhdq m1, m5 paddd m4, m1 mova m1, m0 punpcklqdq m0, m4 punpckhqdq m1, m4 paddd m0, m1 %else ; ssse3/sse4 ; FIXME if we rearrange the filter in pairs of 4, we can ; load pixels likewise and use 2 x paddd + phaddd instead ; of 3 x phaddd here, faster on older cpus phaddd m0, m1 phaddd m4, m5 phaddd m0, m4 ; filter[{ 0, 1,..., 6, 7}]*src[filterPos[0]+{0,1,...,6,7}], ; filter[{ 8, 9,...,14,15}]*src[filterPos[1]+{0,1,...,6,7}], ; filter[{16,17,...,22,23}]*src[filterPos[2]+{0,1,...,6,7}], ; filter[{24,25,...,30,31}]*src[filterPos[3]+{0,1,...,6,7}] %endif ; sse2/ssse3/sse4 %endif ; %3 == 4/8 %else ; %3 == X, i.e. any filterSize scaling %ifidn %4, X4 %define dlt 4 %else ; %4 == X || %4 == X8 %define dlt 0 %endif ; %4 ==/!= X4 %if ARCH_X86_64 %define srcq r8 %define pos1q r7 %define srcendq r9 movsxd fltsizeq, fltsized ; filterSize lea srcendq, [srcmemq+(fltsizeq-dlt)*srcmul] ; &src[filterSize&~4] %else ; x86-32 %define srcq srcmemq %define pos1q dstq %define srcendq r6m lea pos0q, [srcmemq+(fltsizeq-dlt)*srcmul] ; &src[filterSize&~4] mov srcendq, pos0q %endif ; x86-32/64 lea fltposq, [fltposq+wq*4] %if %2 == 15 lea dstq, [dstq+wq*2] %else ; %2 == 19 lea dstq, [dstq+wq*4] %endif ; %2 == 15/19 movifnidn dstmp, dstq neg wq .loop: mov32 pos0q, dword [fltposq+wq*4+0] ; filterPos[0] mov32 pos1q, dword [fltposq+wq*4+4] ; filterPos[1] ; FIXME maybe do 4px/iteration on x86-64 (x86-32 wouldn't have enough regs)? pxor m4, m4 pxor m5, m5 mov srcq, srcmemmp .innerloop: ; load 2x8 (sse) source pixels into m0/m1 -> m4/m5 movbh m0, [srcq+ pos0q *srcmul] ; src[filterPos[0] + {0,1,2,3(,4,5,6,7)}] movbh m1, [srcq+(pos1q+dlt)*srcmul] ; src[filterPos[1] + {0,1,2,3(,4,5,6,7)}] %if %1 == 8 punpcklbw m0, m3 punpcklbw m1, m3 %endif ; %1 == 8 ; multiply %if %1 == 16 ; pmaddwd needs signed adds, so this moves unsigned -> signed, we'll ; add back 0x8000 * sum(coeffs) after the horizontal add psubw m0, m6 psubw m1, m6 %endif ; %1 == 16 pmaddwd m0, [filterq] ; filter[{0,1,2,3(,4,5,6,7)}] pmaddwd m1, [filterq+(fltsizeq+dlt)*2]; filter[filtersize+{0,1,2,3(,4,5,6,7)}] paddd m4, m0 paddd m5, m1 add filterq, mmsize add srcq, srcmul*mmsize/2 cmp srcq, srcendq ; while (src += 4) < &src[filterSize] jl .innerloop %ifidn %4, X4 mov32 pos1q, dword [fltposq+wq*4+4] ; filterPos[1] movlh m0, [srcq+ pos0q *srcmul] ; split last 4 srcpx of dstpx[0] sub pos1q, fltsizeq ; and first 4 srcpx of dstpx[1] %if %1 > 8 movhps m0, [srcq+(pos1q+dlt)*srcmul] %else ; %1 == 8 movd m1, [srcq+(pos1q+dlt)*srcmul] punpckldq m0, m1 %endif ; %1 == 8 %if %1 == 8 punpcklbw m0, m3 %endif ; %1 == 8 %if %1 == 16 ; pmaddwd needs signed adds, so this moves unsigned -> signed, we'll ; add back 0x8000 * sum(coeffs) after the horizontal add psubw m0, m6 %endif ; %1 == 16 pmaddwd m0, [filterq] %endif ; %4 == X4 lea filterq, [filterq+(fltsizeq+dlt)*2] %if notcpuflag(ssse3) ; sse2 mova m1, m4 punpcklqdq m4, m5 punpckhqdq m1, m5 paddd m4, m1 %else ; ssse3/sse4 phaddd m4, m5 %endif ; sse2/ssse3/sse4 %ifidn %4, X4 paddd m4, m0 %endif ; %3 == X4 %if notcpuflag(ssse3) ; sse2 pshufd m4, m4, 11011000b movhlps m0, m4 paddd m0, m4 %else ; ssse3/sse4 phaddd m4, m4 SWAP 0, 4 %endif ; sse2/ssse3/sse4 %endif ; %3 ==/!= X %if %1 == 16 ; add 0x8000 * sum(coeffs), i.e. back from signed -> unsigned paddd m0, m7 %endif ; %1 == 16 ; clip, store psrad m0, 14 + %1 - %2 %ifidn %3, X movifnidn dstq, dstmp %endif ; %3 == X %if %2 == 15 packssdw m0, m0 %ifnidn %3, X movh [dstq+wq*(2>>wshr)], m0 %else ; %3 == X movd [dstq+wq*2], m0 %endif ; %3 ==/!= X %else ; %2 == 19 PMINSD m0, m2, m4 %ifnidn %3, X mova [dstq+wq*(4>>wshr)], m0 %else ; %3 == X movq [dstq+wq*4], m0 %endif ; %3 ==/!= X %endif ; %2 == 15/19 %ifnidn %3, X add wq, (mmsize<<wshr)/4 ; both 8tap and 4tap really only do 4 pixels ; per iteration. see "shl wq,1" above as for why we do this %else ; %3 == X add wq, 2 %endif ; %3 ==/!= X jl .loop RET %endmacro ; SCALE_FUNCS source_width, intermediate_nbits, n_xmm %macro SCALE_FUNCS 3 SCALE_FUNC %1, %2, 4, 4, 6, %3 SCALE_FUNC %1, %2, 8, 8, 6, %3 SCALE_FUNC %1, %2, X, X4, 7, %3 SCALE_FUNC %1, %2, X, X8, 7, %3 %endmacro ; SCALE_FUNCS2 8_xmm_args, 9to10_xmm_args, 16_xmm_args %macro SCALE_FUNCS2 3 %if notcpuflag(sse4) SCALE_FUNCS 8, 15, %1 SCALE_FUNCS 9, 15, %2 SCALE_FUNCS 10, 15, %2 SCALE_FUNCS 12, 15, %2 SCALE_FUNCS 14, 15, %2 SCALE_FUNCS 16, 15, %3 %endif ; !sse4 SCALE_FUNCS 8, 19, %1 SCALE_FUNCS 9, 19, %2 SCALE_FUNCS 10, 19, %2 SCALE_FUNCS 12, 19, %2 SCALE_FUNCS 14, 19, %2 SCALE_FUNCS 16, 19, %3 %endmacro INIT_XMM sse2 SCALE_FUNCS2 7, 6, 8 INIT_XMM ssse3 SCALE_FUNCS2 6, 6, 8 INIT_XMM sse4 SCALE_FUNCS2 6, 6, 8