[deb_ffmpeg.git] / ffmpeg / libavcodec / x86 / h264_i386.h

/*
 * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * H.264 / AVC / MPEG4 part10 codec.
 * non-MMX i386-specific optimizations for H.264
 * @author Michael Niedermayer <michaelni@gmx.at>
 */

#ifndef AVCODEC_X86_H264_I386_H
#define AVCODEC_X86_H264_I386_H

#include <stddef.h>

#include "libavcodec/cabac.h"
#include "cabac.h"

#if HAVE_INLINE_ASM

//FIXME use some macros to avoid duplicating get_cabac (cannot be done yet
//as that would make optimization work hard)
#if HAVE_7REGS && !BROKEN_COMPILER
#define decode_significance decode_significance_x86
static int decode_significance_x86(CABACContext *c, int max_coeff,
                                   uint8_t *significant_coeff_ctx_base,
                                   int *index, x86_reg last_off){
    void *end= significant_coeff_ctx_base + max_coeff - 1;
    int minusstart= -(intptr_t)significant_coeff_ctx_base;
    int minusindex= 4-(intptr_t)index;
    int bit;
    x86_reg coeff_count;

#ifdef BROKEN_RELOCATIONS
    void *tables;

    __asm__ volatile(
        "lea   "MANGLE(ff_h264_cabac_tables)", %0      \n\t"
        : "=&r"(tables)
        : NAMED_CONSTRAINTS_ARRAY(ff_h264_cabac_tables)
    );
#endif

    __asm__ volatile(
        "3:                                     \n\t"

        BRANCHLESS_GET_CABAC("%4", "%q4", "(%1)", "%3", "%w3",
                             "%5", "%q5", "%k0", "%b0",
                             "%c11(%6)", "%c12(%6)",
                             AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
                             AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
                             AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
                             "%13")

        "test $1, %4                            \n\t"
        " jz 4f                                 \n\t"
        "add  %10, %1                           \n\t"

        BRANCHLESS_GET_CABAC("%4", "%q4", "(%1)", "%3", "%w3",
                             "%5", "%q5", "%k0", "%b0",
                             "%c11(%6)", "%c12(%6)",
                             AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
                             AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
                             AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
                             "%13")

        "sub  %10, %1                           \n\t"
        "mov  %2, %0                            \n\t"
        "movl %7, %%ecx                         \n\t"
        "add  %1, %%"REG_c"                     \n\t"
        "movl %%ecx, (%0)                       \n\t"

        "test $1, %4                            \n\t"
        " jnz 5f                                \n\t"

        "add"OPSIZE"  $4, %2                    \n\t"

        "4:                                     \n\t"
        "add  $1, %1                            \n\t"
        "cmp  %8, %1                            \n\t"
        " jb 3b                                 \n\t"
        "mov  %2, %0                            \n\t"
        "movl %7, %%ecx                         \n\t"
        "add  %1, %%"REG_c"                     \n\t"
        "movl %%ecx, (%0)                       \n\t"
        "5:                                     \n\t"
        "add  %9, %k0                           \n\t"
        "shr $2, %k0                            \n\t"
        : "=&q"(coeff_count), "+r"(significant_coeff_ctx_base), "+m"(index),
          "+&r"(c->low), "=&r"(bit), "+&r"(c->range)
        : "r"(c), "m"(minusstart), "m"(end), "m"(minusindex), "m"(last_off),
          "i"(offsetof(CABACContext, bytestream)),
          "i"(offsetof(CABACContext, bytestream_end))
          TABLES_ARG
        : "%"REG_c, "memory"
    );
    return coeff_count;
}

#define decode_significance_8x8 decode_significance_8x8_x86
static int decode_significance_8x8_x86(CABACContext *c,
                                       uint8_t *significant_coeff_ctx_base,
                                       int *index, uint8_t *last_coeff_ctx_base, const uint8_t *sig_off){
    int minusindex= 4-(intptr_t)index;
    int bit;
    x86_reg coeff_count;
    x86_reg last=0;
    x86_reg state;

#ifdef BROKEN_RELOCATIONS
    void *tables;

    __asm__ volatile(
        "lea    "MANGLE(ff_h264_cabac_tables)", %0      \n\t"
        : "=&r"(tables)
        : NAMED_CONSTRAINTS_ARRAY(ff_h264_cabac_tables)
    );
#endif

    __asm__ volatile(
        "mov %1, %6                             \n\t"
        "3:                                     \n\t"

        "mov %10, %0                            \n\t"
        "movzbl (%0, %6), %k6                   \n\t"
        "add %9, %6                             \n\t"

        BRANCHLESS_GET_CABAC("%4", "%q4", "(%6)", "%3", "%w3",
                             "%5", "%q5", "%k0", "%b0",
                             "%c12(%7)", "%c13(%7)",
                             AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
                             AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
                             AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
                             "%15")

        "mov %1, %k6                            \n\t"
        "test $1, %4                            \n\t"
        " jz 4f                                 \n\t"

#ifdef BROKEN_RELOCATIONS
        "movzbl %c14(%15, %q6), %k6\n\t"
#else
        "movzbl "MANGLE(ff_h264_cabac_tables)"+%c14(%k6), %k6\n\t"
#endif
        "add %11, %6                            \n\t"

        BRANCHLESS_GET_CABAC("%4", "%q4", "(%6)", "%3", "%w3",
                             "%5", "%q5", "%k0", "%b0",
                             "%c12(%7)", "%c13(%7)",
                             AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
                             AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
                             AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
                             "%15")

        "mov %2, %0                             \n\t"
        "mov %1, %k6                            \n\t"
        "movl %k6, (%0)                         \n\t"

        "test $1, %4                            \n\t"
        " jnz 5f                                \n\t"

        "add"OPSIZE"  $4, %2                    \n\t"

        "4:                                     \n\t"
        "addl $1, %k6                           \n\t"
        "mov %k6, %1                            \n\t"
        "cmpl $63, %k6                          \n\t"
        " jb 3b                                 \n\t"
        "mov %2, %0                             \n\t"
        "movl %k6, (%0)                         \n\t"
        "5:                                     \n\t"
        "addl %8, %k0                           \n\t"
        "shr $2, %k0                            \n\t"
        : "=&q"(coeff_count), "+m"(last), "+m"(index), "+&r"(c->low),
          "=&r"(bit), "+&r"(c->range), "=&r"(state)
        : "r"(c), "m"(minusindex), "m"(significant_coeff_ctx_base),
          "m"(sig_off), "m"(last_coeff_ctx_base),
          "i"(offsetof(CABACContext, bytestream)),
          "i"(offsetof(CABACContext, bytestream_end)),
          "i"(H264_LAST_COEFF_FLAG_OFFSET_8x8_OFFSET) TABLES_ARG
        : "%"REG_c, "memory"
    );
    return coeff_count;
}
#endif /* HAVE_7REGS && BROKEN_COMPILER */

#endif /* HAVE_INLINE_ASM */
#endif /* AVCODEC_X86_H264_I386_H */
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
	3	* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
	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	/**
	23	* @file
	24	* H.264 / AVC / MPEG4 part10 codec.
	25	* non-MMX i386-specific optimizations for H.264
	26	* @author Michael Niedermayer <michaelni@gmx.at>
	27	*/
	28
	29	#ifndef AVCODEC_X86_H264_I386_H
	30	#define AVCODEC_X86_H264_I386_H
	31
	32	#include <stddef.h>
	33
	34	#include "libavcodec/cabac.h"
	35	#include "cabac.h"
	36
	37	#if HAVE_INLINE_ASM
	38
	39	//FIXME use some macros to avoid duplicating get_cabac (cannot be done yet
	40	//as that would make optimization work hard)
	41	#if HAVE_7REGS && !BROKEN_COMPILER
	42	#define decode_significance decode_significance_x86
	43	static int decode_significance_x86(CABACContext *c, int max_coeff,
	44	uint8_t *significant_coeff_ctx_base,
	45	int *index, x86_reg last_off){
	46	void *end= significant_coeff_ctx_base + max_coeff - 1;
	47	int minusstart= -(intptr_t)significant_coeff_ctx_base;
	48	int minusindex= 4-(intptr_t)index;
	49	int bit;
	50	x86_reg coeff_count;
	51
	52	#ifdef BROKEN_RELOCATIONS
	53	void *tables;
	54
	55	__asm__ volatile(
	56	"lea "MANGLE(ff_h264_cabac_tables)", %0 \n\t"
	57	: "=&r"(tables)
	58	: NAMED_CONSTRAINTS_ARRAY(ff_h264_cabac_tables)
	59	);
	60	#endif
	61
	62	__asm__ volatile(
	63	"3: \n\t"
	64
65	BRANCHLESS_GET_CABAC("%4", "%q4", "(%1)", "%3", "%w3",
66	"%5", "%q5", "%k0", "%b0",
67	"%c11(%6)", "%c12(%6)",
68	AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
69	AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
70	AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
71	"%13")
72
73	"test $1, %4 \n\t"
74	" jz 4f \n\t"
75	"add %10, %1 \n\t"
76
77	BRANCHLESS_GET_CABAC("%4", "%q4", "(%1)", "%3", "%w3",
78	"%5", "%q5", "%k0", "%b0",
79	"%c11(%6)", "%c12(%6)",
80	AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
81	AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
82	AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
83	"%13")
84
85	"sub %10, %1 \n\t"
86	"mov %2, %0 \n\t"
87	"movl %7, %%ecx \n\t"
88	"add %1, %%"REG_c" \n\t"
89	"movl %%ecx, (%0) \n\t"
90
91	"test $1, %4 \n\t"
92	" jnz 5f \n\t"
93
94	"add"OPSIZE" $4, %2 \n\t"
95
96	"4: \n\t"
97	"add $1, %1 \n\t"
98	"cmp %8, %1 \n\t"
99	" jb 3b \n\t"
100	"mov %2, %0 \n\t"
101	"movl %7, %%ecx \n\t"
102	"add %1, %%"REG_c" \n\t"
103	"movl %%ecx, (%0) \n\t"
104	"5: \n\t"
105	"add %9, %k0 \n\t"
106	"shr $2, %k0 \n\t"
107	: "=&q"(coeff_count), "+r"(significant_coeff_ctx_base), "+m"(index),
108	"+&r"(c->low), "=&r"(bit), "+&r"(c->range)
109	: "r"(c), "m"(minusstart), "m"(end), "m"(minusindex), "m"(last_off),
110	"i"(offsetof(CABACContext, bytestream)),
111	"i"(offsetof(CABACContext, bytestream_end))
112	TABLES_ARG
113	: "%"REG_c, "memory"
114	);
115	return coeff_count;
116	}
117
118	#define decode_significance_8x8 decode_significance_8x8_x86
119	static int decode_significance_8x8_x86(CABACContext *c,
120	uint8_t *significant_coeff_ctx_base,
121	int index, uint8_t last_coeff_ctx_base, const uint8_t *sig_off){
122	int minusindex= 4-(intptr_t)index;
123	int bit;
124	x86_reg coeff_count;
125	x86_reg last=0;
126	x86_reg state;
127
128	#ifdef BROKEN_RELOCATIONS
129	void *tables;
130
131	__asm__ volatile(
132	"lea "MANGLE(ff_h264_cabac_tables)", %0 \n\t"
133	: "=&r"(tables)
134	: NAMED_CONSTRAINTS_ARRAY(ff_h264_cabac_tables)
135	);
136	#endif
137
138	__asm__ volatile(
139	"mov %1, %6 \n\t"
140	"3: \n\t"
141
142	"mov %10, %0 \n\t"
143	"movzbl (%0, %6), %k6 \n\t"
144	"add %9, %6 \n\t"
145
146	BRANCHLESS_GET_CABAC("%4", "%q4", "(%6)", "%3", "%w3",
147	"%5", "%q5", "%k0", "%b0",
148	"%c12(%7)", "%c13(%7)",
149	AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
150	AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
151	AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
152	"%15")
153
154	"mov %1, %k6 \n\t"
155	"test $1, %4 \n\t"
156	" jz 4f \n\t"
157
158	#ifdef BROKEN_RELOCATIONS
159	"movzbl %c14(%15, %q6), %k6\n\t"
160	#else
161	"movzbl "MANGLE(ff_h264_cabac_tables)"+%c14(%k6), %k6\n\t"
162	#endif
163	"add %11, %6 \n\t"
164
165	BRANCHLESS_GET_CABAC("%4", "%q4", "(%6)", "%3", "%w3",
166	"%5", "%q5", "%k0", "%b0",
167	"%c12(%7)", "%c13(%7)",
168	AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
169	AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
170	AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
171	"%15")
172
173	"mov %2, %0 \n\t"
174	"mov %1, %k6 \n\t"
175	"movl %k6, (%0) \n\t"
176
177	"test $1, %4 \n\t"
178	" jnz 5f \n\t"
179
180	"add"OPSIZE" $4, %2 \n\t"
181
182	"4: \n\t"
183	"addl $1, %k6 \n\t"
184	"mov %k6, %1 \n\t"
185	"cmpl $63, %k6 \n\t"
186	" jb 3b \n\t"
187	"mov %2, %0 \n\t"
188	"movl %k6, (%0) \n\t"
189	"5: \n\t"
190	"addl %8, %k0 \n\t"
191	"shr $2, %k0 \n\t"
192	: "=&q"(coeff_count), "+m"(last), "+m"(index), "+&r"(c->low),
193	"=&r"(bit), "+&r"(c->range), "=&r"(state)
194	: "r"(c), "m"(minusindex), "m"(significant_coeff_ctx_base),
195	"m"(sig_off), "m"(last_coeff_ctx_base),
196	"i"(offsetof(CABACContext, bytestream)),
197	"i"(offsetof(CABACContext, bytestream_end)),
198	"i"(H264_LAST_COEFF_FLAG_OFFSET_8x8_OFFSET) TABLES_ARG
199	: "%"REG_c, "memory"
200	);
201	return coeff_count;
202	}
203	#endif /* HAVE_7REGS && BROKEN_COMPILER */
204
205	#endif /* HAVE_INLINE_ASM */
206	#endif /* AVCODEC_X86_H264_I386_H */