174 lines
4.7 KiB
NASM
174 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 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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;* 51, Inc., Foundation 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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SECTION_RODATA
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cextern pw_255
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SECTION_TEXT
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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 mmxext
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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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