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173 lines
4.7 KiB
173 lines
4.7 KiB
;****************************************************************************** |
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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 "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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