[libav.git] / libavcodec / i386 / 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 h264_i386.h
 * H.264 / AVC / MPEG4 part10 codec.
 * non-MMX i386-specific optimizations for H.264
 * @author Michael Niedermayer <michaelni@gmx.at>
 */

#ifndef FFMPEG_H264_I386_H
#define FFMPEG_H264_I386_H


#include "cabac.h"

//FIXME use some macros to avoid duplicatin get_cabac (cannot be done yet as that would make optimization work hard)
#if defined(ARCH_X86) && defined(HAVE_7REGS) && defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS)
static int decode_significance_x86(CABACContext *c, int max_coeff, uint8_t *significant_coeff_ctx_base, int *index){
    void *end= significant_coeff_ctx_base + max_coeff - 1;
    int minusstart= -(int)significant_coeff_ctx_base;
    int minusindex= 4-(int)index;
    int coeff_count;
    asm volatile(
        "movl "RANGE    "(%3), %%esi            \n\t"
        "movl "LOW      "(%3), %%ebx            \n\t"

        "2:                                     \n\t"

        BRANCHLESS_GET_CABAC("%%edx", "%3", "(%1)", "%%ebx", "%%bx", "%%esi", "%%eax", "%%al")

        "test $1, %%edx                         \n\t"
        " jz 3f                                 \n\t"

        BRANCHLESS_GET_CABAC("%%edx", "%3", "61(%1)", "%%ebx", "%%bx", "%%esi", "%%eax", "%%al")

        "mov  %2, %%"REG_a"                     \n\t"
        "movl %4, %%ecx                         \n\t"
        "add  %1, %%"REG_c"                     \n\t"
        "movl %%ecx, (%%"REG_a")                \n\t"

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

        "add  $4, %%"REG_a"                     \n\t"
        "mov  %%"REG_a", %2                     \n\t"

        "3:                                     \n\t"
        "add  $1, %1                            \n\t"
        "cmp  %5, %1                            \n\t"
        " jb 2b                                 \n\t"
        "mov  %2, %%"REG_a"                     \n\t"
        "movl %4, %%ecx                         \n\t"
        "add  %1, %%"REG_c"                     \n\t"
        "movl %%ecx, (%%"REG_a")                \n\t"
        "4:                                     \n\t"
        "add  %6, %%eax                         \n\t"
        "shr $2, %%eax                          \n\t"

        "movl %%esi, "RANGE    "(%3)            \n\t"
        "movl %%ebx, "LOW      "(%3)            \n\t"
        :"=&a"(coeff_count), "+r"(significant_coeff_ctx_base), "+m"(index)
        :"r"(c), "m"(minusstart), "m"(end), "m"(minusindex)
        : "%"REG_c, "%ebx", "%edx", "%esi", "memory"
    );
    return coeff_count;
}

static int decode_significance_8x8_x86(CABACContext *c, uint8_t *significant_coeff_ctx_base, int *index, const uint8_t *sig_off){
    int minusindex= 4-(int)index;
    int coeff_count;
    long last=0;
    asm volatile(
        "movl "RANGE    "(%3), %%esi            \n\t"
        "movl "LOW      "(%3), %%ebx            \n\t"

        "mov %1, %%"REG_D"                      \n\t"
        "2:                                     \n\t"

        "mov %6, %%"REG_a"                      \n\t"
        "movzbl (%%"REG_a", %%"REG_D"), %%edi   \n\t"
        "add %5, %%"REG_D"                      \n\t"

        BRANCHLESS_GET_CABAC("%%edx", "%3", "(%%"REG_D")", "%%ebx", "%%bx", "%%esi", "%%eax", "%%al")

        "mov %1, %%edi                          \n\t"
        "test $1, %%edx                         \n\t"
        " jz 3f                                 \n\t"

        "movzbl "MANGLE(last_coeff_flag_offset_8x8)"(%%edi), %%edi\n\t"
        "add %5, %%"REG_D"                      \n\t"

        BRANCHLESS_GET_CABAC("%%edx", "%3", "15(%%"REG_D")", "%%ebx", "%%bx", "%%esi", "%%eax", "%%al")

        "mov %2, %%"REG_a"                      \n\t"
        "mov %1, %%edi                          \n\t"
        "movl %%edi, (%%"REG_a")                \n\t"

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

        "add $4, %%"REG_a"                      \n\t"
        "mov %%"REG_a", %2                      \n\t"

        "3:                                     \n\t"
        "addl $1, %%edi                         \n\t"
        "mov %%edi, %1                          \n\t"
        "cmpl $63, %%edi                        \n\t"
        " jb 2b                                 \n\t"
        "mov %2, %%"REG_a"                      \n\t"
        "movl %%edi, (%%"REG_a")                \n\t"
        "4:                                     \n\t"
        "addl %4, %%eax                         \n\t"
        "shr $2, %%eax                          \n\t"

        "movl %%esi, "RANGE    "(%3)            \n\t"
        "movl %%ebx, "LOW      "(%3)            \n\t"
        :"=&a"(coeff_count),"+m"(last), "+m"(index)
        :"r"(c), "m"(minusindex), "m"(significant_coeff_ctx_base), "m"(sig_off)
        : "%"REG_c, "%ebx", "%edx", "%esi", "%"REG_D, "memory"
    );
    return coeff_count;
}
#endif /* defined(ARCH_X86) && && defined(HAVE_7REGS) && defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS) */

#endif /* FFMPEG_H264_I386_H */
Commit	Line	Data
52cb7981 JD	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 h264_i386.h
	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 FFMPEG_H264_I386_H
	30	#define FFMPEG_H264_I386_H
	31
	32
	33	#include "cabac.h"
	34
	35	//FIXME use some macros to avoid duplicatin get_cabac (cannot be done yet as that would make optimization work hard)
	36	#if defined(ARCH_X86) && defined(HAVE_7REGS) && defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS)
	37	static int decode_significance_x86(CABACContext c, int max_coeff, uint8_t significant_coeff_ctx_base, int *index){
	38	void *end= significant_coeff_ctx_base + max_coeff - 1;
	39	int minusstart= -(int)significant_coeff_ctx_base;
	40	int minusindex= 4-(int)index;
	41	int coeff_count;
	42	asm volatile(
	43	"movl "RANGE "(%3), %%esi \n\t"
	44	"movl "LOW "(%3), %%ebx \n\t"
	45
	46	"2: \n\t"
	47
	48	BRANCHLESS_GET_CABAC("%%edx", "%3", "(%1)", "%%ebx", "%%bx", "%%esi", "%%eax", "%%al")
	49
	50	"test $1, %%edx \n\t"
	51	" jz 3f \n\t"
	52
	53	BRANCHLESS_GET_CABAC("%%edx", "%3", "61(%1)", "%%ebx", "%%bx", "%%esi", "%%eax", "%%al")
	54
	55	"mov %2, %%"REG_a" \n\t"
	56	"movl %4, %%ecx \n\t"
	57	"add %1, %%"REG_c" \n\t"
	58	"movl %%ecx, (%%"REG_a") \n\t"
	59
	60	"test $1, %%edx \n\t"
	61	" jnz 4f \n\t"
	62
	63	"add $4, %%"REG_a" \n\t"
	64	"mov %%"REG_a", %2 \n\t"
65
66	"3: \n\t"
67	"add $1, %1 \n\t"
68	"cmp %5, %1 \n\t"
69	" jb 2b \n\t"
70	"mov %2, %%"REG_a" \n\t"
71	"movl %4, %%ecx \n\t"
72	"add %1, %%"REG_c" \n\t"
73	"movl %%ecx, (%%"REG_a") \n\t"
74	"4: \n\t"
75	"add %6, %%eax \n\t"
76	"shr $2, %%eax \n\t"
77
78	"movl %%esi, "RANGE "(%3) \n\t"
79	"movl %%ebx, "LOW "(%3) \n\t"
80	:"=&a"(coeff_count), "+r"(significant_coeff_ctx_base), "+m"(index)
81	:"r"(c), "m"(minusstart), "m"(end), "m"(minusindex)
82	: "%"REG_c, "%ebx", "%edx", "%esi", "memory"
83	);
84	return coeff_count;
85	}
86
87	static int decode_significance_8x8_x86(CABACContext c, uint8_t significant_coeff_ctx_base, int index, const uint8_t sig_off){
88	int minusindex= 4-(int)index;
89	int coeff_count;
90	long last=0;
91	asm volatile(
92	"movl "RANGE "(%3), %%esi \n\t"
93	"movl "LOW "(%3), %%ebx \n\t"
94
95	"mov %1, %%"REG_D" \n\t"
96	"2: \n\t"
97
98	"mov %6, %%"REG_a" \n\t"
99	"movzbl (%%"REG_a", %%"REG_D"), %%edi \n\t"
100	"add %5, %%"REG_D" \n\t"
101
102	BRANCHLESS_GET_CABAC("%%edx", "%3", "(%%"REG_D")", "%%ebx", "%%bx", "%%esi", "%%eax", "%%al")
103
104	"mov %1, %%edi \n\t"
105	"test $1, %%edx \n\t"
106	" jz 3f \n\t"
107
108	"movzbl "MANGLE(last_coeff_flag_offset_8x8)"(%%edi), %%edi\n\t"
109	"add %5, %%"REG_D" \n\t"
110
111	BRANCHLESS_GET_CABAC("%%edx", "%3", "15(%%"REG_D")", "%%ebx", "%%bx", "%%esi", "%%eax", "%%al")
112
113	"mov %2, %%"REG_a" \n\t"
114	"mov %1, %%edi \n\t"
115	"movl %%edi, (%%"REG_a") \n\t"
116
117	"test $1, %%edx \n\t"
118	" jnz 4f \n\t"
119
120	"add $4, %%"REG_a" \n\t"
121	"mov %%"REG_a", %2 \n\t"
122
123	"3: \n\t"
124	"addl $1, %%edi \n\t"
125	"mov %%edi, %1 \n\t"
126	"cmpl $63, %%edi \n\t"
127	" jb 2b \n\t"
128	"mov %2, %%"REG_a" \n\t"
129	"movl %%edi, (%%"REG_a") \n\t"
130	"4: \n\t"
131	"addl %4, %%eax \n\t"
132	"shr $2, %%eax \n\t"
133
134	"movl %%esi, "RANGE "(%3) \n\t"
135	"movl %%ebx, "LOW "(%3) \n\t"
136	:"=&a"(coeff_count),"+m"(last), "+m"(index)
137	:"r"(c), "m"(minusindex), "m"(significant_coeff_ctx_base), "m"(sig_off)
138	: "%"REG_c, "%ebx", "%edx", "%esi", "%"REG_D, "memory"
139	);
140	return coeff_count;
141	}
142	#endif /* defined(ARCH_X86) && && defined(HAVE_7REGS) && defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS) */
143
144	#endif /* FFMPEG_H264_I386_H */