mirror of
https://github.com/FFmpeg/FFmpeg.git
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394d41ee30
This partially reverts commit 58dabf7bf2.
It is no longer necessary to use unaligned mov.
The swapped mov argument fix remains though.
175 lines
4.7 KiB
NASM
175 lines
4.7 KiB
NASM
;******************************************************************************
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;* x86 optimizations for PNG decoding
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;*
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;* Copyright (c) 2008 Loren Merritt <lorenm@u.washington.edu>
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;* Copyright (c) 2012 Ronald S. Bultje <rsbultje@gmail.com>
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;*
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;* This file is part of Libav.
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;*
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;* Libav 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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;* Libav 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 Libav; if not, write to the Free Software
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;* 51, Inc., Foundation Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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;******************************************************************************
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%include "x86inc.asm"
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%include "x86util.asm"
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SECTION_RODATA
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cextern pw_255
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SECTION_TEXT 16
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; %1 = nr. of xmm registers used
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%macro ADD_BYTES_FN 1
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cglobal add_bytes_l2, 4, 6, %1, dst, src1, src2, wa, w, i
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%if ARCH_X86_64
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movsxd waq, wad
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%endif
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xor iq, iq
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; vector loop
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mov wq, waq
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and waq, ~(mmsize*2-1)
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jmp .end_v
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.loop_v:
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mova m0, [src1q+iq]
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mova m1, [src1q+iq+mmsize]
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paddb m0, [src2q+iq]
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paddb m1, [src2q+iq+mmsize]
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mova [dstq+iq ], m0
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mova [dstq+iq+mmsize], m1
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add iq, mmsize*2
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.end_v:
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cmp iq, waq
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jl .loop_v
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%if mmsize == 16
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; vector loop
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mov waq, wq
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and waq, ~7
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jmp .end_l
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.loop_l:
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movq mm0, [src1q+iq]
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paddb mm0, [src2q+iq]
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movq [dstq+iq ], mm0
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add iq, 8
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.end_l:
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cmp iq, waq
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jl .loop_l
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%endif
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; scalar loop for leftover
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jmp .end_s
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.loop_s:
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mov wab, [src1q+iq]
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add wab, [src2q+iq]
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mov [dstq+iq], wab
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inc iq
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.end_s:
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cmp iq, wq
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jl .loop_s
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REP_RET
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%endmacro
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%if ARCH_X86_32
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INIT_MMX mmx
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ADD_BYTES_FN 0
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%endif
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INIT_XMM sse2
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ADD_BYTES_FN 2
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%macro ADD_PAETH_PRED_FN 1
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cglobal add_png_paeth_prediction, 5, 7, %1, dst, src, top, w, bpp, end, cntr
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%if ARCH_X86_64
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movsxd bppq, bppd
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movsxd wq, wd
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%endif
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lea endq, [dstq+wq-(mmsize/2-1)]
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sub topq, dstq
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sub srcq, dstq
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sub dstq, bppq
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pxor m7, m7
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PUSH dstq
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lea cntrq, [bppq-1]
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shr cntrq, 2 + mmsize/16
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.bpp_loop:
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lea dstq, [dstq+cntrq*(mmsize/2)]
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movh m0, [dstq]
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movh m1, [topq+dstq]
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punpcklbw m0, m7
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punpcklbw m1, m7
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add dstq, bppq
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.loop:
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mova m2, m1
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movh m1, [topq+dstq]
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mova m3, m2
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punpcklbw m1, m7
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mova m4, m2
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psubw m3, m1
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psubw m4, m0
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mova m5, m3
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paddw m5, m4
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%if cpuflag(ssse3)
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pabsw m3, m3
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pabsw m4, m4
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pabsw m5, m5
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%else ; !cpuflag(ssse3)
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psubw m7, m5
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pmaxsw m5, m7
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pxor m6, m6
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pxor m7, m7
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psubw m6, m3
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psubw m7, m4
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pmaxsw m3, m6
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pmaxsw m4, m7
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pxor m7, m7
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%endif ; cpuflag(ssse3)
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mova m6, m4
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pminsw m6, m5
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pcmpgtw m3, m6
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pcmpgtw m4, m5
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mova m6, m4
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pand m4, m3
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pandn m6, m3
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pandn m3, m0
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movh m0, [srcq+dstq]
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pand m6, m1
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pand m2, m4
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punpcklbw m0, m7
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paddw m0, m6
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paddw m3, m2
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paddw m0, m3
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pand m0, [pw_255]
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mova m3, m0
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packuswb m3, m3
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movh [dstq], m3
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add dstq, bppq
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cmp dstq, endq
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jle .loop
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mov dstq, [rsp]
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dec cntrq
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jge .bpp_loop
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POP dstq
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RET
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%endmacro
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INIT_MMX mmx2
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ADD_PAETH_PRED_FN 0
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INIT_MMX ssse3
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ADD_PAETH_PRED_FN 0
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