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ffmpeg / libavcodec / x86 / mlpdsp.c @ 2912e87a

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/*
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 * MLP DSP functions x86-optimized
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 * Copyright (c) 2009 Ramiro Polla
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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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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include "libavutil/x86_cpu.h"
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#include "libavcodec/dsputil.h"
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#include "libavcodec/mlp.h"
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#if HAVE_7REGS && HAVE_TEN_OPERANDS
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extern void ff_mlp_firorder_8;
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extern void ff_mlp_firorder_7;
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extern void ff_mlp_firorder_6;
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extern void ff_mlp_firorder_5;
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extern void ff_mlp_firorder_4;
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extern void ff_mlp_firorder_3;
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extern void ff_mlp_firorder_2;
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extern void ff_mlp_firorder_1;
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extern void ff_mlp_firorder_0;
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extern void ff_mlp_iirorder_4;
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extern void ff_mlp_iirorder_3;
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extern void ff_mlp_iirorder_2;
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extern void ff_mlp_iirorder_1;
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extern void ff_mlp_iirorder_0;
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static const void *firtable[9] = { &ff_mlp_firorder_0, &ff_mlp_firorder_1,
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                                   &ff_mlp_firorder_2, &ff_mlp_firorder_3,
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                                   &ff_mlp_firorder_4, &ff_mlp_firorder_5,
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                                   &ff_mlp_firorder_6, &ff_mlp_firorder_7,
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                                   &ff_mlp_firorder_8 };
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static const void *iirtable[5] = { &ff_mlp_iirorder_0, &ff_mlp_iirorder_1,
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                                   &ff_mlp_iirorder_2, &ff_mlp_iirorder_3,
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                                   &ff_mlp_iirorder_4 };
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#if ARCH_X86_64
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#define MLPMUL(label, offset, offs, offc)   \
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    LABEL_MANGLE(label)":             \n\t" \
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    "movslq "offset"+"offs"(%0), %%rax\n\t" \
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    "movslq "offset"+"offc"(%1), %%rdx\n\t" \
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    "imul                 %%rdx, %%rax\n\t" \
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    "add                  %%rax, %%rsi\n\t"
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#define FIRMULREG(label, offset, firc)\
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    LABEL_MANGLE(label)":       \n\t" \
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    "movslq "#offset"(%0), %%rax\n\t" \
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    "imul        %"#firc", %%rax\n\t" \
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    "add            %%rax, %%rsi\n\t"
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#define CLEAR_ACCUM                   \
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    "xor            %%rsi, %%rsi\n\t"
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#define SHIFT_ACCUM                   \
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    "shr     %%cl,         %%rsi\n\t"
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#define ACCUM    "%%rdx"
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#define RESULT   "%%rsi"
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#define RESULT32 "%%esi"
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#else /* if ARCH_X86_32 */
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#define MLPMUL(label, offset, offs, offc)  \
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    LABEL_MANGLE(label)":            \n\t" \
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    "mov   "offset"+"offs"(%0), %%eax\n\t" \
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    "imull "offset"+"offc"(%1)       \n\t" \
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    "add                %%eax , %%esi\n\t" \
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    "adc                %%edx , %%ecx\n\t"
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#define FIRMULREG(label, offset, firc)  \
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    MLPMUL(label, #offset, "0", "0")
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#define CLEAR_ACCUM                  \
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    "xor           %%esi, %%esi\n\t" \
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    "xor           %%ecx, %%ecx\n\t"
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#define SHIFT_ACCUM                  \
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    "mov           %%ecx, %%edx\n\t" \
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    "mov           %%esi, %%eax\n\t" \
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    "movzbl        %7   , %%ecx\n\t" \
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    "shrd    %%cl, %%edx, %%eax\n\t" \
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#define ACCUM    "%%edx"
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#define RESULT   "%%eax"
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#define RESULT32 "%%eax"
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#endif /* !ARCH_X86_64 */
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#define BINC  AV_STRINGIFY(4* MAX_CHANNELS)
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#define IOFFS AV_STRINGIFY(4*(MAX_FIR_ORDER + MAX_BLOCKSIZE))
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#define IOFFC AV_STRINGIFY(4* MAX_FIR_ORDER)
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#define FIRMUL(label, offset) MLPMUL(label, #offset,   "0",   "0")
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#define IIRMUL(label, offset) MLPMUL(label, #offset, IOFFS, IOFFC)
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static void mlp_filter_channel_x86(int32_t *state, const int32_t *coeff,
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                                   int firorder, int iirorder,
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                                   unsigned int filter_shift, int32_t mask,
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                                   int blocksize, int32_t *sample_buffer)
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{
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    const void *firjump = firtable[firorder];
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    const void *iirjump = iirtable[iirorder];
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    blocksize = -blocksize;
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    __asm__ volatile(
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        "1:                           \n\t"
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        CLEAR_ACCUM
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        "jmp  *%5                     \n\t"
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        FIRMUL   (ff_mlp_firorder_8, 0x1c   )
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        FIRMUL   (ff_mlp_firorder_7, 0x18   )
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        FIRMUL   (ff_mlp_firorder_6, 0x14   )
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        FIRMUL   (ff_mlp_firorder_5, 0x10   )
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        FIRMUL   (ff_mlp_firorder_4, 0x0c   )
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        FIRMULREG(ff_mlp_firorder_3, 0x08,10)
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        FIRMULREG(ff_mlp_firorder_2, 0x04, 9)
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        FIRMULREG(ff_mlp_firorder_1, 0x00, 8)
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        LABEL_MANGLE(ff_mlp_firorder_0)":\n\t"
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        "jmp  *%6                     \n\t"
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        IIRMUL   (ff_mlp_iirorder_4, 0x0c   )
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        IIRMUL   (ff_mlp_iirorder_3, 0x08   )
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        IIRMUL   (ff_mlp_iirorder_2, 0x04   )
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        IIRMUL   (ff_mlp_iirorder_1, 0x00   )
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        LABEL_MANGLE(ff_mlp_iirorder_0)":\n\t"
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        SHIFT_ACCUM
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        "mov  "RESULT"  ,"ACCUM"      \n\t"
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        "add  (%2)      ,"RESULT"     \n\t"
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        "and   %4       ,"RESULT"     \n\t"
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        "sub   $4       ,  %0         \n\t"
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        "mov  "RESULT32", (%0)        \n\t"
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        "mov  "RESULT32", (%2)        \n\t"
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        "add $"BINC"    ,  %2         \n\t"
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        "sub  "ACCUM"   ,"RESULT"     \n\t"
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        "mov  "RESULT32","IOFFS"(%0)  \n\t"
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        "incl              %3         \n\t"
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        "js 1b                        \n\t"
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        : /* 0*/"+r"(state),
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          /* 1*/"+r"(coeff),
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          /* 2*/"+r"(sample_buffer),
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#if ARCH_X86_64
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          /* 3*/"+r"(blocksize)
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        : /* 4*/"r"((x86_reg)mask), /* 5*/"r"(firjump),
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          /* 6*/"r"(iirjump)      , /* 7*/"c"(filter_shift)
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        , /* 8*/"r"((int64_t)coeff[0])
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        , /* 9*/"r"((int64_t)coeff[1])
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        , /*10*/"r"((int64_t)coeff[2])
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        : "rax", "rdx", "rsi"
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#else /* ARCH_X86_32 */
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          /* 3*/"+m"(blocksize)
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        : /* 4*/"m"(         mask), /* 5*/"m"(firjump),
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          /* 6*/"m"(iirjump)      , /* 7*/"m"(filter_shift)
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        : "eax", "edx", "esi", "ecx"
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#endif /* !ARCH_X86_64 */
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    );
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}
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#endif /* HAVE_7REGS && HAVE_TEN_OPERANDS */
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void ff_mlp_init_x86(DSPContext* c, AVCodecContext *avctx)
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{
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#if HAVE_7REGS && HAVE_TEN_OPERANDS
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    c->mlp_filter_channel = mlp_filter_channel_x86;
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#endif
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}