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libavcodec/x86/mlpdsp.c

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00001 /*
00002  * MLP DSP functions x86-optimized
00003  * Copyright (c) 2009 Ramiro Polla
00004  *
00005  * This file is part of FFmpeg.
00006  *
00007  * FFmpeg is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * FFmpeg is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with FFmpeg; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00022 #include "libavutil/x86_cpu.h"
00023 #include "libavcodec/dsputil.h"
00024 #include "libavcodec/mlp.h"
00025 
00026 #if HAVE_7REGS && HAVE_TEN_OPERANDS
00027 
00028 extern void ff_mlp_firorder_8;
00029 extern void ff_mlp_firorder_7;
00030 extern void ff_mlp_firorder_6;
00031 extern void ff_mlp_firorder_5;
00032 extern void ff_mlp_firorder_4;
00033 extern void ff_mlp_firorder_3;
00034 extern void ff_mlp_firorder_2;
00035 extern void ff_mlp_firorder_1;
00036 extern void ff_mlp_firorder_0;
00037 
00038 extern void ff_mlp_iirorder_4;
00039 extern void ff_mlp_iirorder_3;
00040 extern void ff_mlp_iirorder_2;
00041 extern void ff_mlp_iirorder_1;
00042 extern void ff_mlp_iirorder_0;
00043 
00044 static const void *firtable[9] = { &ff_mlp_firorder_0, &ff_mlp_firorder_1,
00045                                    &ff_mlp_firorder_2, &ff_mlp_firorder_3,
00046                                    &ff_mlp_firorder_4, &ff_mlp_firorder_5,
00047                                    &ff_mlp_firorder_6, &ff_mlp_firorder_7,
00048                                    &ff_mlp_firorder_8 };
00049 static const void *iirtable[5] = { &ff_mlp_iirorder_0, &ff_mlp_iirorder_1,
00050                                    &ff_mlp_iirorder_2, &ff_mlp_iirorder_3,
00051                                    &ff_mlp_iirorder_4 };
00052 
00053 #if ARCH_X86_64
00054 
00055 #define MLPMUL(label, offset, offs, offc)   \
00056     LABEL_MANGLE(label)":             \n\t" \
00057     "movslq "offset"+"offs"(%0), %%rax\n\t" \
00058     "movslq "offset"+"offc"(%1), %%rdx\n\t" \
00059     "imul                 %%rdx, %%rax\n\t" \
00060     "add                  %%rax, %%rsi\n\t"
00061 
00062 #define FIRMULREG(label, offset, firc)\
00063     LABEL_MANGLE(label)":       \n\t" \
00064     "movslq "#offset"(%0), %%rax\n\t" \
00065     "imul        %"#firc", %%rax\n\t" \
00066     "add            %%rax, %%rsi\n\t"
00067 
00068 #define CLEAR_ACCUM                   \
00069     "xor            %%rsi, %%rsi\n\t"
00070 
00071 #define SHIFT_ACCUM                   \
00072     "shr     %%cl,         %%rsi\n\t"
00073 
00074 #define ACCUM    "%%rdx"
00075 #define RESULT   "%%rsi"
00076 #define RESULT32 "%%esi"
00077 
00078 #else /* if ARCH_X86_32 */
00079 
00080 #define MLPMUL(label, offset, offs, offc)  \
00081     LABEL_MANGLE(label)":            \n\t" \
00082     "mov   "offset"+"offs"(%0), %%eax\n\t" \
00083     "imull "offset"+"offc"(%1)       \n\t" \
00084     "add                %%eax , %%esi\n\t" \
00085     "adc                %%edx , %%ecx\n\t"
00086 
00087 #define FIRMULREG(label, offset, firc)  \
00088     MLPMUL(label, #offset, "0", "0")
00089 
00090 #define CLEAR_ACCUM                  \
00091     "xor           %%esi, %%esi\n\t" \
00092     "xor           %%ecx, %%ecx\n\t"
00093 
00094 #define SHIFT_ACCUM                  \
00095     "mov           %%ecx, %%edx\n\t" \
00096     "mov           %%esi, %%eax\n\t" \
00097     "movzbl        %7   , %%ecx\n\t" \
00098     "shrd    %%cl, %%edx, %%eax\n\t" \
00099 
00100 #define ACCUM    "%%edx"
00101 #define RESULT   "%%eax"
00102 #define RESULT32 "%%eax"
00103 
00104 #endif /* !ARCH_X86_64 */
00105 
00106 #define BINC  AV_STRINGIFY(4* MAX_CHANNELS)
00107 #define IOFFS AV_STRINGIFY(4*(MAX_FIR_ORDER + MAX_BLOCKSIZE))
00108 #define IOFFC AV_STRINGIFY(4* MAX_FIR_ORDER)
00109 
00110 #define FIRMUL(label, offset) MLPMUL(label, #offset,   "0",   "0")
00111 #define IIRMUL(label, offset) MLPMUL(label, #offset, IOFFS, IOFFC)
00112 
00113 static void mlp_filter_channel_x86(int32_t *state, const int32_t *coeff,
00114                                    int firorder, int iirorder,
00115                                    unsigned int filter_shift, int32_t mask,
00116                                    int blocksize, int32_t *sample_buffer)
00117 {
00118     const void *firjump = firtable[firorder];
00119     const void *iirjump = iirtable[iirorder];
00120 
00121     blocksize = -blocksize;
00122 
00123     __asm__ volatile(
00124         "1:                           \n\t"
00125         CLEAR_ACCUM
00126         "jmp  *%5                     \n\t"
00127         FIRMUL   (ff_mlp_firorder_8, 0x1c   )
00128         FIRMUL   (ff_mlp_firorder_7, 0x18   )
00129         FIRMUL   (ff_mlp_firorder_6, 0x14   )
00130         FIRMUL   (ff_mlp_firorder_5, 0x10   )
00131         FIRMUL   (ff_mlp_firorder_4, 0x0c   )
00132         FIRMULREG(ff_mlp_firorder_3, 0x08,10)
00133         FIRMULREG(ff_mlp_firorder_2, 0x04, 9)
00134         FIRMULREG(ff_mlp_firorder_1, 0x00, 8)
00135         LABEL_MANGLE(ff_mlp_firorder_0)":\n\t"
00136         "jmp  *%6                     \n\t"
00137         IIRMUL   (ff_mlp_iirorder_4, 0x0c   )
00138         IIRMUL   (ff_mlp_iirorder_3, 0x08   )
00139         IIRMUL   (ff_mlp_iirorder_2, 0x04   )
00140         IIRMUL   (ff_mlp_iirorder_1, 0x00   )
00141         LABEL_MANGLE(ff_mlp_iirorder_0)":\n\t"
00142         SHIFT_ACCUM
00143         "mov  "RESULT"  ,"ACCUM"      \n\t"
00144         "add  (%2)      ,"RESULT"     \n\t"
00145         "and   %4       ,"RESULT"     \n\t"
00146         "sub   $4       ,  %0         \n\t"
00147         "mov  "RESULT32", (%0)        \n\t"
00148         "mov  "RESULT32", (%2)        \n\t"
00149         "add $"BINC"    ,  %2         \n\t"
00150         "sub  "ACCUM"   ,"RESULT"     \n\t"
00151         "mov  "RESULT32","IOFFS"(%0)  \n\t"
00152         "incl              %3         \n\t"
00153         "js 1b                        \n\t"
00154         : /* 0*/"+r"(state),
00155           /* 1*/"+r"(coeff),
00156           /* 2*/"+r"(sample_buffer),
00157 #if ARCH_X86_64
00158           /* 3*/"+r"(blocksize)
00159         : /* 4*/"r"((x86_reg)mask), /* 5*/"r"(firjump),
00160           /* 6*/"r"(iirjump)      , /* 7*/"c"(filter_shift)
00161         , /* 8*/"r"((int64_t)coeff[0])
00162         , /* 9*/"r"((int64_t)coeff[1])
00163         , /*10*/"r"((int64_t)coeff[2])
00164         : "rax", "rdx", "rsi"
00165 #else /* ARCH_X86_32 */
00166           /* 3*/"+m"(blocksize)
00167         : /* 4*/"m"(         mask), /* 5*/"m"(firjump),
00168           /* 6*/"m"(iirjump)      , /* 7*/"m"(filter_shift)
00169         : "eax", "edx", "esi", "ecx"
00170 #endif /* !ARCH_X86_64 */
00171     );
00172 }
00173 
00174 #endif /* HAVE_7REGS && HAVE_TEN_OPERANDS */
00175 
00176 void ff_mlp_init_x86(DSPContext* c, AVCodecContext *avctx)
00177 {
00178 #if HAVE_7REGS && HAVE_TEN_OPERANDS
00179     c->mlp_filter_channel = mlp_filter_channel_x86;
00180 #endif
00181 }

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