[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

#if ARCH_X86_64
#define REG64 "r"
#else
#define REG64 "m"
#endif

//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"
        "movzb (%0, %6), %6                     \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, %6                             \n\t"
        "test $1, %4                            \n\t"
        " jz 4f                                 \n\t"

#ifdef BROKEN_RELOCATIONS
        "movzb %c14(%15, %q6), %6\n\t"
#else
        "movzb "MANGLE(ff_h264_cabac_tables)"+%c14(%6), %6\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, %6                             \n\t"
        "mov %k6, (%0)                          \n\t"

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

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

        "4:                                     \n\t"
        "add $1, %6                             \n\t"
        "mov %6, %1                             \n\t"
        "cmp $63, %6                            \n\t"
        " jb 3b                                 \n\t"
        "mov %2, %0                             \n\t"
        "mov %k6, (%0)                          \n\t"
        "5:                                     \n\t"
        "addl %8, %k0                           \n\t"
        "shr $2, %k0                            \n\t"
        : "=&q"(coeff_count), "+"REG64(last), "+"REG64(index), "+&r"(c->low),
          "=&r"(bit), "+&r"(c->range), "=&r"(state)
        : "r"(c), "m"(minusindex), "m"(significant_coeff_ctx_base),
          REG64(sig_off), REG64(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
f6fa7814 DM	39	#if ARCH_X86_64
	40	#define REG64 "r"
	41	#else
	42	#define REG64 "m"
	43	#endif
	44
2ba45a60 DM	45	//FIXME use some macros to avoid duplicating get_cabac (cannot be done yet
	46	//as that would make optimization work hard)
	47	#if HAVE_7REGS && !BROKEN_COMPILER
	48	#define decode_significance decode_significance_x86
	49	static int decode_significance_x86(CABACContext *c, int max_coeff,
	50	uint8_t *significant_coeff_ctx_base,
	51	int *index, x86_reg last_off){
	52	void *end= significant_coeff_ctx_base + max_coeff - 1;
	53	int minusstart= -(intptr_t)significant_coeff_ctx_base;
	54	int minusindex= 4-(intptr_t)index;
	55	int bit;
	56	x86_reg coeff_count;
	57
	58	#ifdef BROKEN_RELOCATIONS
	59	void *tables;
	60
	61	__asm__ volatile(
	62	"lea "MANGLE(ff_h264_cabac_tables)", %0 \n\t"
	63	: "=&r"(tables)
	64	: NAMED_CONSTRAINTS_ARRAY(ff_h264_cabac_tables)
	65	);
	66	#endif
	67
	68	__asm__ volatile(
	69	"3: \n\t"
	70
	71	BRANCHLESS_GET_CABAC("%4", "%q4", "(%1)", "%3", "%w3",
	72	"%5", "%q5", "%k0", "%b0",
	73	"%c11(%6)", "%c12(%6)",
	74	AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
	75	AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
	76	AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
	77	"%13")
	78
	79	"test $1, %4 \n\t"
	80	" jz 4f \n\t"
	81	"add %10, %1 \n\t"
	82
	83	BRANCHLESS_GET_CABAC("%4", "%q4", "(%1)", "%3", "%w3",
	84	"%5", "%q5", "%k0", "%b0",
	85	"%c11(%6)", "%c12(%6)",
	86	AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
	87	AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
	88	AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
	89	"%13")
	90
	91	"sub %10, %1 \n\t"
	92	"mov %2, %0 \n\t"
	93	"movl %7, %%ecx \n\t"
	94	"add %1, %%"REG_c" \n\t"
	95	"movl %%ecx, (%0) \n\t"
	96
	97	"test $1, %4 \n\t"
	98	" jnz 5f \n\t"
	99
	100	"add"OPSIZE" $4, %2 \n\t"
	101
	102	"4: \n\t"
	103	"add $1, %1 \n\t"
	104	"cmp %8, %1 \n\t"
	105	" jb 3b \n\t"
	106	"mov %2, %0 \n\t"
	107	"movl %7, %%ecx \n\t"
	108	"add %1, %%"REG_c" \n\t"
109	"movl %%ecx, (%0) \n\t"
110	"5: \n\t"
111	"add %9, %k0 \n\t"
112	"shr $2, %k0 \n\t"
113	: "=&q"(coeff_count), "+r"(significant_coeff_ctx_base), "+m"(index),
114	"+&r"(c->low), "=&r"(bit), "+&r"(c->range)
115	: "r"(c), "m"(minusstart), "m"(end), "m"(minusindex), "m"(last_off),
116	"i"(offsetof(CABACContext, bytestream)),
117	"i"(offsetof(CABACContext, bytestream_end))
118	TABLES_ARG
119	: "%"REG_c, "memory"
120	);
121	return coeff_count;
122	}
123
124	#define decode_significance_8x8 decode_significance_8x8_x86
125	static int decode_significance_8x8_x86(CABACContext *c,
126	uint8_t *significant_coeff_ctx_base,
127	int index, uint8_t last_coeff_ctx_base, const uint8_t *sig_off){
128	int minusindex= 4-(intptr_t)index;
129	int bit;
130	x86_reg coeff_count;
131	x86_reg last=0;
132	x86_reg state;
133
134	#ifdef BROKEN_RELOCATIONS
135	void *tables;
136
137	__asm__ volatile(
138	"lea "MANGLE(ff_h264_cabac_tables)", %0 \n\t"
139	: "=&r"(tables)
140	: NAMED_CONSTRAINTS_ARRAY(ff_h264_cabac_tables)
141	);
142	#endif
143
144	__asm__ volatile(
145	"mov %1, %6 \n\t"
146	"3: \n\t"
147
148	"mov %10, %0 \n\t"
f6fa7814	149	"movzb (%0, %6), %6 \n\t"
2ba45a60 DM	150	"add %9, %6 \n\t"
	151
	152	BRANCHLESS_GET_CABAC("%4", "%q4", "(%6)", "%3", "%w3",
	153	"%5", "%q5", "%k0", "%b0",
	154	"%c12(%7)", "%c13(%7)",
	155	AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
	156	AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
	157	AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
	158	"%15")
	159
f6fa7814	160	"mov %1, %6 \n\t"
2ba45a60 DM	161	"test $1, %4 \n\t"
	162	" jz 4f \n\t"
	163
	164	#ifdef BROKEN_RELOCATIONS
f6fa7814	165	"movzb %c14(%15, %q6), %6\n\t"
2ba45a60	166	#else
f6fa7814	167	"movzb "MANGLE(ff_h264_cabac_tables)"+%c14(%6), %6\n\t"
2ba45a60 DM	168	#endif
	169	"add %11, %6 \n\t"
	170
	171	BRANCHLESS_GET_CABAC("%4", "%q4", "(%6)", "%3", "%w3",
	172	"%5", "%q5", "%k0", "%b0",
	173	"%c12(%7)", "%c13(%7)",
	174	AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
	175	AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
	176	AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
	177	"%15")
	178
	179	"mov %2, %0 \n\t"
f6fa7814 DM	180	"mov %1, %6 \n\t"
f6fa7814 DM	181	"mov %k6, (%0) \n\t"
2ba45a60 DM	182
	183	"test $1, %4 \n\t"
	184	" jnz 5f \n\t"
	185
	186	"add"OPSIZE" $4, %2 \n\t"
	187
	188	"4: \n\t"
f6fa7814 DM	189	"add $1, %6 \n\t"
	190	"mov %6, %1 \n\t"
	191	"cmp $63, %6 \n\t"
2ba45a60 DM	192	" jb 3b \n\t"
2ba45a60 DM	193	"mov %2, %0 \n\t"
f6fa7814	194	"mov %k6, (%0) \n\t"
2ba45a60 DM	195	"5: \n\t"
	196	"addl %8, %k0 \n\t"
	197	"shr $2, %k0 \n\t"
f6fa7814	198	: "=&q"(coeff_count), "+"REG64(last), "+"REG64(index), "+&r"(c->low),
2ba45a60 DM	199	"=&r"(bit), "+&r"(c->range), "=&r"(state)
2ba45a60 DM	200	: "r"(c), "m"(minusindex), "m"(significant_coeff_ctx_base),
f6fa7814	201	REG64(sig_off), REG64(last_coeff_ctx_base),
2ba45a60 DM	202	"i"(offsetof(CABACContext, bytestream)),
	203	"i"(offsetof(CABACContext, bytestream_end)),
	204	"i"(H264_LAST_COEFF_FLAG_OFFSET_8x8_OFFSET) TABLES_ARG
	205	: "%"REG_c, "memory"
	206	);
	207	return coeff_count;
	208	}
	209	#endif /* HAVE_7REGS && BROKEN_COMPILER */
	210
	211	#endif /* HAVE_INLINE_ASM */
	212	#endif /* AVCODEC_X86_H264_I386_H */