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mlpdsp_init.c
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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/attributes.h"
23 #include "libavutil/cpu.h"
24 #include "libavutil/x86/asm.h"
25 #include "libavutil/x86/cpu.h"
26 #include "libavcodec/mlpdsp.h"
27 #include "libavcodec/mlp.h"
28 
29 #define REMATRIX_CHANNEL_FUNC(opt) \
30 void ff_mlp_rematrix_channel_##opt(int32_t *samples, \
31  const int32_t *coeffs, \
32  const uint8_t *bypassed_lsbs, \
33  const int8_t *noise_buffer, \
34  int index, \
35  unsigned int dest_ch, \
36  uint16_t blockpos, \
37  unsigned int maxchan, \
38  int matrix_noise_shift, \
39  int access_unit_size_pow2, \
40  int32_t mask);
41 
43 REMATRIX_CHANNEL_FUNC(avx2_bmi2)
44 
45 #if HAVE_7REGS && HAVE_INLINE_ASM && HAVE_INLINE_ASM_NONLOCAL_LABELS
46 
47 extern char ff_mlp_firorder_8;
48 extern char ff_mlp_firorder_7;
49 extern char ff_mlp_firorder_6;
50 extern char ff_mlp_firorder_5;
51 extern char ff_mlp_firorder_4;
52 extern char ff_mlp_firorder_3;
53 extern char ff_mlp_firorder_2;
54 extern char ff_mlp_firorder_1;
55 extern char ff_mlp_firorder_0;
56 
57 extern char ff_mlp_iirorder_4;
58 extern char ff_mlp_iirorder_3;
59 extern char ff_mlp_iirorder_2;
60 extern char ff_mlp_iirorder_1;
61 extern char ff_mlp_iirorder_0;
62 
63 static const void * const firtable[9] = { &ff_mlp_firorder_0, &ff_mlp_firorder_1,
64  &ff_mlp_firorder_2, &ff_mlp_firorder_3,
65  &ff_mlp_firorder_4, &ff_mlp_firorder_5,
66  &ff_mlp_firorder_6, &ff_mlp_firorder_7,
67  &ff_mlp_firorder_8 };
68 static const void * const iirtable[5] = { &ff_mlp_iirorder_0, &ff_mlp_iirorder_1,
69  &ff_mlp_iirorder_2, &ff_mlp_iirorder_3,
70  &ff_mlp_iirorder_4 };
71 
72 #if ARCH_X86_64
73 
74 #define MLPMUL(label, offset, offs, offc) \
75  LABEL_MANGLE(label)": \n\t" \
76  "movslq "offset"+"offs"(%0), %%rax\n\t" \
77  "movslq "offset"+"offc"(%1), %%rdx\n\t" \
78  "imul %%rdx, %%rax\n\t" \
79  "add %%rax, %%rsi\n\t"
80 
81 #define FIRMULREG(label, offset, firc)\
82  LABEL_MANGLE(label)": \n\t" \
83  "movslq "#offset"(%0), %%rax\n\t" \
84  "imul %"#firc", %%rax\n\t" \
85  "add %%rax, %%rsi\n\t"
86 
87 #define CLEAR_ACCUM \
88  "xor %%rsi, %%rsi\n\t"
89 
90 #define SHIFT_ACCUM \
91  "shr %%cl, %%rsi\n\t"
92 
93 #define ACCUM "%%rdx"
94 #define RESULT "%%rsi"
95 #define RESULT32 "%%esi"
96 
97 #else /* if ARCH_X86_32 */
98 
99 #define MLPMUL(label, offset, offs, offc) \
100  LABEL_MANGLE(label)": \n\t" \
101  "mov "offset"+"offs"(%0), %%eax\n\t" \
102  "imull "offset"+"offc"(%1) \n\t" \
103  "add %%eax , %%esi\n\t" \
104  "adc %%edx , %%ecx\n\t"
105 
106 #define FIRMULREG(label, offset, firc) \
107  MLPMUL(label, #offset, "0", "0")
108 
109 #define CLEAR_ACCUM \
110  "xor %%esi, %%esi\n\t" \
111  "xor %%ecx, %%ecx\n\t"
112 
113 #define SHIFT_ACCUM \
114  "mov %%ecx, %%edx\n\t" \
115  "mov %%esi, %%eax\n\t" \
116  "movzbl %7 , %%ecx\n\t" \
117  "shrd %%cl, %%edx, %%eax\n\t" \
118 
119 #define ACCUM "%%edx"
120 #define RESULT "%%eax"
121 #define RESULT32 "%%eax"
122 
123 #endif /* !ARCH_X86_64 */
124 
125 #define BINC AV_STRINGIFY(4* MAX_CHANNELS)
126 #define IOFFS AV_STRINGIFY(4*(MAX_FIR_ORDER + MAX_BLOCKSIZE))
127 #define IOFFC AV_STRINGIFY(4* MAX_FIR_ORDER)
128 
129 #define FIRMUL(label, offset) MLPMUL(label, #offset, "0", "0")
130 #define IIRMUL(label, offset) MLPMUL(label, #offset, IOFFS, IOFFC)
131 
132 static void mlp_filter_channel_x86(int32_t *state, const int32_t *coeff,
133  int firorder, int iirorder,
134  unsigned int filter_shift, int32_t mask,
135  int blocksize, int32_t *sample_buffer)
136 {
137  const void *firjump = firtable[firorder];
138  const void *iirjump = iirtable[iirorder];
139 
140  blocksize = -blocksize;
141 
142  __asm__ volatile(
143  "1: \n\t"
144  CLEAR_ACCUM
145  "jmp *%5 \n\t"
146  FIRMUL (ff_mlp_firorder_8, 0x1c )
147  FIRMUL (ff_mlp_firorder_7, 0x18 )
148  FIRMUL (ff_mlp_firorder_6, 0x14 )
149  FIRMUL (ff_mlp_firorder_5, 0x10 )
150  FIRMUL (ff_mlp_firorder_4, 0x0c )
151  FIRMUL (ff_mlp_firorder_3, 0x08 )
152  FIRMUL (ff_mlp_firorder_2, 0x04 )
153  FIRMULREG(ff_mlp_firorder_1, 0x00, 8)
154  LABEL_MANGLE(ff_mlp_firorder_0)":\n\t"
155  "jmp *%6 \n\t"
156  IIRMUL (ff_mlp_iirorder_4, 0x0c )
157  IIRMUL (ff_mlp_iirorder_3, 0x08 )
158  IIRMUL (ff_mlp_iirorder_2, 0x04 )
159  IIRMUL (ff_mlp_iirorder_1, 0x00 )
160  LABEL_MANGLE(ff_mlp_iirorder_0)":\n\t"
161  SHIFT_ACCUM
162  "mov "RESULT" ,"ACCUM" \n\t"
163  "add (%2) ,"RESULT" \n\t"
164  "and %4 ,"RESULT" \n\t"
165  "sub $4 , %0 \n\t"
166  "mov "RESULT32", (%0) \n\t"
167  "mov "RESULT32", (%2) \n\t"
168  "add $"BINC" , %2 \n\t"
169  "sub "ACCUM" ,"RESULT" \n\t"
170  "mov "RESULT32","IOFFS"(%0) \n\t"
171  "incl %3 \n\t"
172  "js 1b \n\t"
173  : /* 0*/"+r"(state),
174  /* 1*/"+r"(coeff),
175  /* 2*/"+r"(sample_buffer),
176 #if ARCH_X86_64
177  /* 3*/"+r"(blocksize)
178  : /* 4*/"r"((x86_reg)mask), /* 5*/"r"(firjump),
179  /* 6*/"r"(iirjump) , /* 7*/"c"(filter_shift)
180  , /* 8*/"r"((int64_t)coeff[0])
181  : "rax", "rdx", "rsi"
182 #else /* ARCH_X86_32 */
183  /* 3*/"+m"(blocksize)
184  : /* 4*/"m"( mask), /* 5*/"m"(firjump),
185  /* 6*/"m"(iirjump) , /* 7*/"m"(filter_shift)
186  : "eax", "edx", "esi", "ecx"
187 #endif /* !ARCH_X86_64 */
188  );
189 }
190 
191 #endif /* HAVE_7REGS && HAVE_INLINE_ASM */
192 
194 {
195  int cpu_flags = av_get_cpu_flags();
196 #if HAVE_7REGS && HAVE_INLINE_ASM && HAVE_INLINE_ASM_NONLOCAL_LABELS
197  if (INLINE_MMX(cpu_flags))
198  c->mlp_filter_channel = mlp_filter_channel_x86;
199 #endif
200  if (ARCH_X86_64 && EXTERNAL_SSE4(cpu_flags))
201  c->mlp_rematrix_channel = ff_mlp_rematrix_channel_sse4;
202  if (ARCH_X86_64 && EXTERNAL_AVX2_FAST(cpu_flags) && cpu_flags & AV_CPU_FLAG_BMI2)
203  c->mlp_rematrix_channel = ff_mlp_rematrix_channel_avx2_bmi2;
204 }
void(* mlp_rematrix_channel)(int32_t *samples, const int32_t *coeffs, const uint8_t *bypassed_lsbs, const int8_t *noise_buffer, int index, unsigned int dest_ch, uint16_t blockpos, unsigned int maxchan, int matrix_noise_shift, int access_unit_size_pow2, int32_t mask)
Definition: mlpdsp.h:54
const char * b
Definition: vf_curves.c:113
static atomic_int cpu_flags
Definition: cpu.c:50
Macro definitions for various function/variable attributes.
#define EXTERNAL_SSE4(flags)
Definition: cpu.h:68
#define av_cold
Definition: attributes.h:82
#define ACCUM(k, x, d)
static struct @281 state
av_cold void ff_mlpdsp_init_x86(MLPDSPContext *c)
Definition: mlpdsp_init.c:193
#define EXTERNAL_AVX2_FAST(flags)
Definition: cpu.h:79
#define INLINE_MMX(flags)
Definition: cpu.h:85
static const uint16_t mask[17]
Definition: lzw.c:38
const char * r
Definition: vf_curves.c:111
int32_t
#define AV_CPU_FLAG_BMI2
Bit Manipulation Instruction Set 2.
Definition: cpu.h:57
int n
Definition: avisynth_c.h:684
#define REMATRIX_CHANNEL_FUNC(opt)
Definition: mlpdsp_init.c:29
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:92
static double c[64]
int x86_reg
Definition: asm.h:72
static const double coeff[2][5]
Definition: vf_owdenoise.c:72
void(* mlp_filter_channel)(int32_t *state, const int32_t *coeff, int firorder, int iirorder, unsigned int filter_shift, int32_t mask, int blocksize, int32_t *sample_buffer)
Definition: mlpdsp.h:50
#define LABEL_MANGLE(a)
Definition: asm.h:103