mlp: Use LABEL_MANGLE() to export label symbols from inside asm block.
[ffmpeg.git] / libavcodec / x86 / mlpdsp.c
1 /*
2  * MLP DSP functions x86-optimized
3  * Copyright (c) 2009 Ramiro Polla
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21
22 #include "libavutil/x86_cpu.h"
23 #include "libavcodec/dsputil.h"
24 #include "libavcodec/mlp.h"
25
26 #if HAVE_7REGS && HAVE_TEN_OPERANDS
27
28 extern void ff_mlp_firorder_8;
29 extern void ff_mlp_firorder_7;
30 extern void ff_mlp_firorder_6;
31 extern void ff_mlp_firorder_5;
32 extern void ff_mlp_firorder_4;
33 extern void ff_mlp_firorder_3;
34 extern void ff_mlp_firorder_2;
35 extern void ff_mlp_firorder_1;
36 extern void ff_mlp_firorder_0;
37
38 extern void ff_mlp_iirorder_4;
39 extern void ff_mlp_iirorder_3;
40 extern void ff_mlp_iirorder_2;
41 extern void ff_mlp_iirorder_1;
42 extern void ff_mlp_iirorder_0;
43
44 static const void *firtable[9] = { &ff_mlp_firorder_0, &ff_mlp_firorder_1,
45                                    &ff_mlp_firorder_2, &ff_mlp_firorder_3,
46                                    &ff_mlp_firorder_4, &ff_mlp_firorder_5,
47                                    &ff_mlp_firorder_6, &ff_mlp_firorder_7,
48                                    &ff_mlp_firorder_8 };
49 static const void *iirtable[5] = { &ff_mlp_iirorder_0, &ff_mlp_iirorder_1,
50                                    &ff_mlp_iirorder_2, &ff_mlp_iirorder_3,
51                                    &ff_mlp_iirorder_4 };
52
53 #if ARCH_X86_64
54
55 #define MLPMUL(label, offset, offs, offc)   \
56     LABEL_MANGLE(label)":             \n\t" \
57     "movslq "offset"+"offs"(%0), %%rax\n\t" \
58     "movslq "offset"+"offc"(%1), %%rdx\n\t" \
59     "imul                 %%rdx, %%rax\n\t" \
60     "add                  %%rax, %%rsi\n\t"
61
62 #define FIRMULREG(label, offset, firc)\
63     LABEL_MANGLE(label)":       \n\t" \
64     "movslq "#offset"(%0), %%rax\n\t" \
65     "imul        %"#firc", %%rax\n\t" \
66     "add            %%rax, %%rsi\n\t"
67
68 #define CLEAR_ACCUM                   \
69     "xor            %%rsi, %%rsi\n\t"
70
71 #define SHIFT_ACCUM                   \
72     "shr     %%cl,         %%rsi\n\t"
73
74 #define ACCUM    "%%rdx"
75 #define RESULT   "%%rsi"
76 #define RESULT32 "%%esi"
77
78 #define READVAL "r"
79 #define RDWRVAL "+r"
80 #define COUNTER "c"
81 #define ECXUSED
82
83 #else /* if ARCH_X86_32 */
84
85 #define MLPMUL(label, offset, offs, offc)  \
86     LABEL_MANGLE(label)":            \n\t" \
87     "mov   "offset"+"offs"(%0), %%eax\n\t" \
88     "imull "offset"+"offc"(%1)       \n\t" \
89     "add                %%eax , %%esi\n\t" \
90     "adc                %%edx , %%ecx\n\t"
91
92 #define FIRMULREG(label, offset, firc)  \
93     MLPMUL(label, #offset, "0", "0")
94
95 #define CLEAR_ACCUM                  \
96     "xor           %%esi, %%esi\n\t" \
97     "xor           %%ecx, %%ecx\n\t"
98
99 #define SHIFT_ACCUM                  \
100     "mov           %%ecx, %%edx\n\t" \
101     "mov           %%esi, %%eax\n\t" \
102     "movzbl        %7   , %%ecx\n\t" \
103     "shrd    %%cl, %%edx, %%eax\n\t" \
104
105 #define ACCUM    "%%edx"
106 #define RESULT   "%%eax"
107 #define RESULT32 "%%eax"
108
109 #define READVAL "m"
110 #define RDWRVAL "+m"
111 #define COUNTER "m"
112 #define ECXUSED , "ecx"
113
114 #endif /* !ARCH_X86_64 */
115
116 #define BINC  AV_STRINGIFY(4* MAX_CHANNELS)
117 #define IOFFS AV_STRINGIFY(4*(MAX_FIR_ORDER + MAX_BLOCKSIZE))
118 #define IOFFC AV_STRINGIFY(4* MAX_FIR_ORDER)
119
120 #define FIRMUL(label, offset) MLPMUL(label, #offset,   "0",   "0")
121 #define IIRMUL(label, offset) MLPMUL(label, #offset, IOFFS, IOFFC)
122
123 static void mlp_filter_channel_x86(int32_t *state, const int32_t *coeff,
124                                    int firorder, int iirorder,
125                                    unsigned int filter_shift, int32_t mask,
126                                    int blocksize, int32_t *sample_buffer)
127 {
128     const void *firjump = firtable[firorder];
129     const void *iirjump = iirtable[iirorder];
130
131     blocksize = -blocksize;
132
133     __asm__ volatile(
134         "1:                           \n\t"
135         CLEAR_ACCUM
136         "jmp  *%5                     \n\t"
137         FIRMUL   (ff_mlp_firorder_8, 0x1c   )
138         FIRMUL   (ff_mlp_firorder_7, 0x18   )
139         FIRMUL   (ff_mlp_firorder_6, 0x14   )
140         FIRMUL   (ff_mlp_firorder_5, 0x10   )
141         FIRMUL   (ff_mlp_firorder_4, 0x0c   )
142         FIRMULREG(ff_mlp_firorder_3, 0x08,10)
143         FIRMULREG(ff_mlp_firorder_2, 0x04, 9)
144         FIRMULREG(ff_mlp_firorder_1, 0x00, 8)
145         LABEL_MANGLE(ff_mlp_firorder_0)":\n\t"
146         "jmp  *%6                     \n\t"
147         IIRMUL   (ff_mlp_iirorder_4, 0x0c   )
148         IIRMUL   (ff_mlp_iirorder_3, 0x08   )
149         IIRMUL   (ff_mlp_iirorder_2, 0x04   )
150         IIRMUL   (ff_mlp_iirorder_1, 0x00   )
151         LABEL_MANGLE(ff_mlp_iirorder_0)":\n\t"
152         SHIFT_ACCUM
153         "mov  "RESULT"  ,"ACCUM"      \n\t"
154         "add  (%2)      ,"RESULT"     \n\t"
155         "and   %4       ,"RESULT"     \n\t"
156         "sub   $4       ,  %0         \n\t"
157         "mov  "RESULT32", (%0)        \n\t"
158         "mov  "RESULT32", (%2)        \n\t"
159         "add $"BINC"    ,  %2         \n\t"
160         "sub  "ACCUM"   ,"RESULT"     \n\t"
161         "mov  "RESULT32","IOFFS"(%0)  \n\t"
162         "incl              %3         \n\t"
163         "js 1b                        \n\t"
164         : /* 0*/"+r"(state),
165           /* 1*/"+r"(coeff),
166           /* 2*/"+r"(sample_buffer),
167           /* 3*/RDWRVAL(blocksize)
168         :
169           /* 4*/READVAL((x86_reg)mask),
170           /* 5*/READVAL(firjump),
171           /* 6*/READVAL(iirjump),
172           /* 7*/COUNTER(filter_shift)
173 #if ARCH_X86_64
174         , /* 8*/"r"((int64_t)coeff[0])
175         , /* 9*/"r"((int64_t)coeff[1])
176         , /*10*/"r"((int64_t)coeff[2])
177 #endif /* ARCH_X86_64 */
178         : REG_a, REG_d, REG_S
179           ECXUSED
180     );
181 }
182
183 #endif /* HAVE_7REGS && HAVE_TEN_OPERANDS */
184
185 void ff_mlp_init_x86(DSPContext* c, AVCodecContext *avctx)
186 {
187 #if HAVE_7REGS && HAVE_TEN_OPERANDS
188     c->mlp_filter_channel = mlp_filter_channel_x86;
189 #endif
190 }