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

/*
 * 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
 */

#ifndef AVCODEC_X86_CABAC_H
#define AVCODEC_X86_CABAC_H

#include "libavcodec/cabac.h"
#include "libavutil/attributes.h"
#include "libavutil/macros.h"
#include "libavutil/x86/asm.h"
#include "config.h"

#if   (defined(__i386) && defined(__clang__) && (__clang_major__<2 || (__clang_major__==2 && __clang_minor__<10)))\
   || (                  !defined(__clang__) && defined(__llvm__) && __GNUC__==4 && __GNUC_MINOR__==2 && __GNUC_PATCHLEVEL__<=1)\
   || (defined(__INTEL_COMPILER) && defined(_MSC_VER))
#       define BROKEN_COMPILER 1
#else
#       define BROKEN_COMPILER 0
#endif

#if HAVE_INLINE_ASM

#ifndef UNCHECKED_BITSTREAM_READER
#define UNCHECKED_BITSTREAM_READER !CONFIG_SAFE_BITSTREAM_READER
#endif

#if UNCHECKED_BITSTREAM_READER
#define END_CHECK(end) ""
#else
#define END_CHECK(end) \
        "cmp    "end"       , %%"REG_c"                                 \n\t"\
        "jge    1f                                                      \n\t"
#endif

#ifdef BROKEN_RELOCATIONS
#define TABLES_ARG , "r"(tables)

#if HAVE_FAST_CMOV
#define BRANCHLESS_GET_CABAC_UPDATE(ret, retq, low, range, tmp) \
        "cmp    "low"       , "tmp"                        \n\t"\
        "cmova  %%ecx       , "range"                      \n\t"\
        "sbb    %%rcx       , %%rcx                        \n\t"\
        "and    %%ecx       , "tmp"                        \n\t"\
        "xor    %%rcx       , "retq"                       \n\t"\
        "sub    "tmp"       , "low"                        \n\t"
#else /* HAVE_FAST_CMOV */
#define BRANCHLESS_GET_CABAC_UPDATE(ret, retq, low, range, tmp) \
/* P4 Prescott has crappy cmov,sbb,64bit shift so avoid them */ \
        "sub    "low"       , "tmp"                        \n\t"\
        "sar    $31         , "tmp"                        \n\t"\
        "sub    %%ecx       , "range"                      \n\t"\
        "and    "tmp"       , "range"                      \n\t"\
        "add    %%ecx       , "range"                      \n\t"\
        "shl    $17         , %%ecx                        \n\t"\
        "and    "tmp"       , %%ecx                        \n\t"\
        "sub    %%ecx       , "low"                        \n\t"\
        "xor    "tmp"       , "ret"                        \n\t"\
        "movslq "ret"       , "retq"                       \n\t"
#endif /* HAVE_FAST_CMOV */

#define BRANCHLESS_GET_CABAC(ret, retq, statep, low, lowword, range, rangeq, tmp, tmpbyte, byte, end, norm_off, lps_off, mlps_off, tables) \
        "movzbl "statep"    , "ret"                                     \n\t"\
        "mov    "range"     , "tmp"                                     \n\t"\
        "and    $0xC0       , "range"                                   \n\t"\
        "lea    ("ret", "range", 2), %%ecx                              \n\t"\
        "movzbl "lps_off"("tables", %%rcx), "range"                     \n\t"\
        "sub    "range"     , "tmp"                                     \n\t"\
        "mov    "tmp"       , %%ecx                                     \n\t"\
        "shl    $17         , "tmp"                                     \n\t"\
        BRANCHLESS_GET_CABAC_UPDATE(ret, retq, low, range, tmp)              \
        "movzbl "norm_off"("tables", "rangeq"), %%ecx                   \n\t"\
        "shl    %%cl        , "range"                                   \n\t"\
        "movzbl "mlps_off"+128("tables", "retq"), "tmp"                 \n\t"\
        "shl    %%cl        , "low"                                     \n\t"\
        "mov    "tmpbyte"   , "statep"                                  \n\t"\
        "test   "lowword"   , "lowword"                                 \n\t"\
        "jnz    2f                                                      \n\t"\
        "mov    "byte"      , %%"REG_c"                                 \n\t"\
        END_CHECK(end)\
        "add"OPSIZE" $2     , "byte"                                    \n\t"\
        "1:                                                             \n\t"\
        "movzwl (%%"REG_c") , "tmp"                                     \n\t"\
        "lea    -1("low")   , %%ecx                                     \n\t"\
        "xor    "low"       , %%ecx                                     \n\t"\
        "shr    $15         , %%ecx                                     \n\t"\
        "bswap  "tmp"                                                   \n\t"\
        "shr    $15         , "tmp"                                     \n\t"\
        "movzbl "norm_off"("tables", %%rcx), %%ecx                      \n\t"\
        "sub    $0xFFFF     , "tmp"                                     \n\t"\
        "neg    %%ecx                                                   \n\t"\
        "add    $7          , %%ecx                                     \n\t"\
        "shl    %%cl        , "tmp"                                     \n\t"\
        "add    "tmp"       , "low"                                     \n\t"\
        "2:                                                             \n\t"

#else /* BROKEN_RELOCATIONS */
#define TABLES_ARG NAMED_CONSTRAINTS_ARRAY_ADD(ff_h264_cabac_tables)
#define RIP_ARG

#if HAVE_FAST_CMOV
#define BRANCHLESS_GET_CABAC_UPDATE(ret, low, range, tmp)\
        "mov    "tmp"       , %%ecx     \n\t"\
        "shl    $17         , "tmp"     \n\t"\
        "cmp    "low"       , "tmp"     \n\t"\
        "cmova  %%ecx       , "range"   \n\t"\
        "sbb    %%ecx       , %%ecx     \n\t"\
        "and    %%ecx       , "tmp"     \n\t"\
        "xor    %%ecx       , "ret"     \n\t"\
        "sub    "tmp"       , "low"     \n\t"
#else /* HAVE_FAST_CMOV */
#define BRANCHLESS_GET_CABAC_UPDATE(ret, low, range, tmp)\
        "mov    "tmp"       , %%ecx     \n\t"\
        "shl    $17         , "tmp"     \n\t"\
        "sub    "low"       , "tmp"     \n\t"\
        "sar    $31         , "tmp"     \n\t" /*lps_mask*/\
        "sub    %%ecx       , "range"   \n\t" /*RangeLPS - range*/\
        "and    "tmp"       , "range"   \n\t" /*(RangeLPS - range)&lps_mask*/\
        "add    %%ecx       , "range"   \n\t" /*new range*/\
        "shl    $17         , %%ecx     \n\t"\
        "and    "tmp"       , %%ecx     \n\t"\
        "sub    %%ecx       , "low"     \n\t"\
        "xor    "tmp"       , "ret"     \n\t"
#endif /* HAVE_FAST_CMOV */

#define BRANCHLESS_GET_CABAC(ret, retq, statep, low, lowword, range, rangeq, tmp, tmpbyte, byte, end, norm_off, lps_off, mlps_off, tables) \
        "movzbl "statep"    , "ret"                                     \n\t"\
        "mov    "range"     , "tmp"                                     \n\t"\
        "and    $0xC0       , "range"                                   \n\t"\
        "movzbl "MANGLE(ff_h264_cabac_tables)"+"lps_off"("ret", "range", 2), "range" \n\t"\
        "sub    "range"     , "tmp"                                     \n\t"\
        BRANCHLESS_GET_CABAC_UPDATE(ret, low, range, tmp)                    \
        "movzbl "MANGLE(ff_h264_cabac_tables)"+"norm_off"("range"), %%ecx    \n\t"\
        "shl    %%cl        , "range"                                   \n\t"\
        "movzbl "MANGLE(ff_h264_cabac_tables)"+"mlps_off"+128("ret"), "tmp"  \n\t"\
        "shl    %%cl        , "low"                                     \n\t"\
        "mov    "tmpbyte"   , "statep"                                  \n\t"\
        "test   "lowword"   , "lowword"                                 \n\t"\
        " jnz   2f                                                      \n\t"\
        "mov    "byte"      , %%"REG_c"                                 \n\t"\
        END_CHECK(end)\
        "add"OPSIZE" $2     , "byte"                                    \n\t"\
        "1:                                                             \n\t"\
        "movzwl (%%"REG_c")     , "tmp"                                 \n\t"\
        "lea    -1("low")   , %%ecx                                     \n\t"\
        "xor    "low"       , %%ecx                                     \n\t"\
        "shr    $15         , %%ecx                                     \n\t"\
        "bswap  "tmp"                                                   \n\t"\
        "shr    $15         , "tmp"                                     \n\t"\
        "movzbl "MANGLE(ff_h264_cabac_tables)"+"norm_off"(%%ecx), %%ecx \n\t"\
        "sub    $0xFFFF     , "tmp"                                     \n\t"\
        "neg    %%ecx                                                   \n\t"\
        "add    $7          , %%ecx                                     \n\t"\
        "shl    %%cl        , "tmp"                                     \n\t"\
        "add    "tmp"       , "low"                                     \n\t"\
        "2:                                                             \n\t"

#endif /* BROKEN_RELOCATIONS */

#if HAVE_7REGS && !BROKEN_COMPILER
#define get_cabac_inline get_cabac_inline_x86
static av_always_inline int get_cabac_inline_x86(CABACContext *c,
                                                 uint8_t *const state)
{
    int bit, tmp;
#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(
        BRANCHLESS_GET_CABAC("%0", "%q0", "(%4)", "%1", "%w1",
                             "%2", "%q2", "%3", "%b3",
                             "%c6(%5)", "%c7(%5)",
                             AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
                             AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
                             AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
                             "%8")
        : "=&r"(bit), "=&r"(c->low), "=&r"(c->range), "=&q"(tmp)
        : "r"(state), "r"(c),
          "i"(offsetof(CABACContext, bytestream)),
          "i"(offsetof(CABACContext, bytestream_end))
          TABLES_ARG
          ,"1"(c->low), "2"(c->range)
        : "%"REG_c, "memory"
    );
    return bit & 1;
}
#endif /* HAVE_7REGS && !BROKEN_COMPILER */

#if !BROKEN_COMPILER
#define get_cabac_bypass_sign get_cabac_bypass_sign_x86
static av_always_inline int get_cabac_bypass_sign_x86(CABACContext *c, int val)
{
    x86_reg tmp;
    __asm__ volatile(
        "movl        %c6(%2), %k1       \n\t"
        "movl        %c3(%2), %%eax     \n\t"
        "shl             $17, %k1       \n\t"
        "add           %%eax, %%eax     \n\t"
        "sub             %k1, %%eax     \n\t"
        "cdq                            \n\t"
        "and           %%edx, %k1       \n\t"
        "add             %k1, %%eax     \n\t"
        "xor           %%edx, %%ecx     \n\t"
        "sub           %%edx, %%ecx     \n\t"
        "test           %%ax, %%ax      \n\t"
        "jnz              1f            \n\t"
        "mov         %c4(%2), %1        \n\t"
        "subl        $0xFFFF, %%eax     \n\t"
        "movzwl         (%1), %%edx     \n\t"
        "bswap         %%edx            \n\t"
        "shrl            $15, %%edx     \n\t"
#if UNCHECKED_BITSTREAM_READER
        "add              $2, %1        \n\t"
        "addl          %%edx, %%eax     \n\t"
        "mov              %1, %c4(%2)   \n\t"
#else
        "addl          %%edx, %%eax     \n\t"
        "cmp         %c5(%2), %1        \n\t"
        "jge              1f            \n\t"
        "add"OPSIZE"      $2, %c4(%2)   \n\t"
#endif
        "1:                             \n\t"
        "movl          %%eax, %c3(%2)   \n\t"

        : "+c"(val), "=&r"(tmp)
        : "r"(c),
          "i"(offsetof(CABACContext, low)),
          "i"(offsetof(CABACContext, bytestream)),
          "i"(offsetof(CABACContext, bytestream_end)),
          "i"(offsetof(CABACContext, range))
        : "%eax", "%edx", "memory"
    );
    return val;
}

#define get_cabac_bypass get_cabac_bypass_x86
static av_always_inline int get_cabac_bypass_x86(CABACContext *c)
{
    x86_reg tmp;
    int res;
    __asm__ volatile(
        "movl        %c6(%2), %k1       \n\t"
        "movl        %c3(%2), %%eax     \n\t"
        "shl             $17, %k1       \n\t"
        "add           %%eax, %%eax     \n\t"
        "sub             %k1, %%eax     \n\t"
        "cdq                            \n\t"
        "and           %%edx, %k1       \n\t"
        "add             %k1, %%eax     \n\t"
        "inc           %%edx            \n\t"
        "test           %%ax, %%ax      \n\t"
        "jnz              1f            \n\t"
        "mov         %c4(%2), %1        \n\t"
        "subl        $0xFFFF, %%eax     \n\t"
        "movzwl         (%1), %%ecx     \n\t"
        "bswap         %%ecx            \n\t"
        "shrl            $15, %%ecx     \n\t"
        "addl          %%ecx, %%eax     \n\t"
        "cmp         %c5(%2), %1        \n\t"
        "jge              1f            \n\t"
        "add"OPSIZE"      $2, %c4(%2)   \n\t"
        "1:                             \n\t"
        "movl          %%eax, %c3(%2)   \n\t"

        : "=&d"(res), "=&r"(tmp)
        : "r"(c),
          "i"(offsetof(CABACContext, low)),
          "i"(offsetof(CABACContext, bytestream)),
          "i"(offsetof(CABACContext, bytestream_end)),
          "i"(offsetof(CABACContext, range))
        : "%eax", "%ecx", "memory"
    );
    return res;
}
#endif /* !BROKEN_COMPILER */

#endif /* HAVE_INLINE_ASM */
#endif /* AVCODEC_X86_CABAC_H */
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
	3	*
	4	* This file is part of FFmpeg.
	5	*
	6	* FFmpeg is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2.1 of the License, or (at your option) any later version.
	10	*
	11	* FFmpeg is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* Lesser General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public
	17	* License along with FFmpeg; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
	21	#ifndef AVCODEC_X86_CABAC_H
	22	#define AVCODEC_X86_CABAC_H
	23
	24	#include "libavcodec/cabac.h"
	25	#include "libavutil/attributes.h"
	26	#include "libavutil/macros.h"
	27	#include "libavutil/x86/asm.h"
	28	#include "config.h"
	29
	30	#if (defined(__i386) && defined(__clang__) && (__clang_major__<2 \|\| (__clang_major__==2 && __clang_minor__<10)))\
	31	\|\| ( !defined(__clang__) && defined(__llvm__) && __GNUC__==4 && __GNUC_MINOR__==2 && __GNUC_PATCHLEVEL__<=1)\
	32	\|\| (defined(__INTEL_COMPILER) && defined(_MSC_VER))
	33	# define BROKEN_COMPILER 1
	34	#else
	35	# define BROKEN_COMPILER 0
	36	#endif
	37
	38	#if HAVE_INLINE_ASM
	39
	40	#ifndef UNCHECKED_BITSTREAM_READER
	41	#define UNCHECKED_BITSTREAM_READER !CONFIG_SAFE_BITSTREAM_READER
	42	#endif
	43
	44	#if UNCHECKED_BITSTREAM_READER
	45	#define END_CHECK(end) ""
	46	#else
	47	#define END_CHECK(end) \
	48	"cmp "end" , %%"REG_c" \n\t"\
	49	"jge 1f \n\t"
	50	#endif
	51
	52	#ifdef BROKEN_RELOCATIONS
	53	#define TABLES_ARG , "r"(tables)
	54
	55	#if HAVE_FAST_CMOV
	56	#define BRANCHLESS_GET_CABAC_UPDATE(ret, retq, low, range, tmp) \
	57	"cmp "low" , "tmp" \n\t"\
	58	"cmova %%ecx , "range" \n\t"\
	59	"sbb %%rcx , %%rcx \n\t"\
	60	"and %%ecx , "tmp" \n\t"\
	61	"xor %%rcx , "retq" \n\t"\
	62	"sub "tmp" , "low" \n\t"
	63	#else /* HAVE_FAST_CMOV */
	64	#define BRANCHLESS_GET_CABAC_UPDATE(ret, retq, low, range, tmp) \
65	/* P4 Prescott has crappy cmov,sbb,64bit shift so avoid them */ \
66	"sub "low" , "tmp" \n\t"\
67	"sar $31 , "tmp" \n\t"\
68	"sub %%ecx , "range" \n\t"\
69	"and "tmp" , "range" \n\t"\
70	"add %%ecx , "range" \n\t"\
71	"shl $17 , %%ecx \n\t"\
72	"and "tmp" , %%ecx \n\t"\
73	"sub %%ecx , "low" \n\t"\
74	"xor "tmp" , "ret" \n\t"\
75	"movslq "ret" , "retq" \n\t"
76	#endif /* HAVE_FAST_CMOV */
77
78	#define BRANCHLESS_GET_CABAC(ret, retq, statep, low, lowword, range, rangeq, tmp, tmpbyte, byte, end, norm_off, lps_off, mlps_off, tables) \
79	"movzbl "statep" , "ret" \n\t"\
80	"mov "range" , "tmp" \n\t"\
81	"and $0xC0 , "range" \n\t"\
82	"lea ("ret", "range", 2), %%ecx \n\t"\
83	"movzbl "lps_off"("tables", %%rcx), "range" \n\t"\
84	"sub "range" , "tmp" \n\t"\
85	"mov "tmp" , %%ecx \n\t"\
86	"shl $17 , "tmp" \n\t"\
87	BRANCHLESS_GET_CABAC_UPDATE(ret, retq, low, range, tmp) \
88	"movzbl "norm_off"("tables", "rangeq"), %%ecx \n\t"\
89	"shl %%cl , "range" \n\t"\
90	"movzbl "mlps_off"+128("tables", "retq"), "tmp" \n\t"\
91	"shl %%cl , "low" \n\t"\
92	"mov "tmpbyte" , "statep" \n\t"\
93	"test "lowword" , "lowword" \n\t"\
94	"jnz 2f \n\t"\
95	"mov "byte" , %%"REG_c" \n\t"\
96	END_CHECK(end)\
97	"add"OPSIZE" $2 , "byte" \n\t"\
98	"1: \n\t"\
99	"movzwl (%%"REG_c") , "tmp" \n\t"\
100	"lea -1("low") , %%ecx \n\t"\
101	"xor "low" , %%ecx \n\t"\
102	"shr $15 , %%ecx \n\t"\
103	"bswap "tmp" \n\t"\
104	"shr $15 , "tmp" \n\t"\
105	"movzbl "norm_off"("tables", %%rcx), %%ecx \n\t"\
106	"sub $0xFFFF , "tmp" \n\t"\
107	"neg %%ecx \n\t"\
108	"add $7 , %%ecx \n\t"\
109	"shl %%cl , "tmp" \n\t"\
110	"add "tmp" , "low" \n\t"\
111	"2: \n\t"
112
113	#else /* BROKEN_RELOCATIONS */
114	#define TABLES_ARG NAMED_CONSTRAINTS_ARRAY_ADD(ff_h264_cabac_tables)
115	#define RIP_ARG
116
117	#if HAVE_FAST_CMOV
118	#define BRANCHLESS_GET_CABAC_UPDATE(ret, low, range, tmp)\
119	"mov "tmp" , %%ecx \n\t"\
120	"shl $17 , "tmp" \n\t"\
121	"cmp "low" , "tmp" \n\t"\
122	"cmova %%ecx , "range" \n\t"\
123	"sbb %%ecx , %%ecx \n\t"\
124	"and %%ecx , "tmp" \n\t"\
125	"xor %%ecx , "ret" \n\t"\
126	"sub "tmp" , "low" \n\t"
127	#else /* HAVE_FAST_CMOV */
128	#define BRANCHLESS_GET_CABAC_UPDATE(ret, low, range, tmp)\
129	"mov "tmp" , %%ecx \n\t"\
130	"shl $17 , "tmp" \n\t"\
131	"sub "low" , "tmp" \n\t"\
132	"sar $31 , "tmp" \n\t" /lps_mask/\
133	"sub %%ecx , "range" \n\t" /RangeLPS - range/\
134	"and "tmp" , "range" \n\t" /(RangeLPS - range)&lps_mask/\
135	"add %%ecx , "range" \n\t" /new range/\
136	"shl $17 , %%ecx \n\t"\
137	"and "tmp" , %%ecx \n\t"\
138	"sub %%ecx , "low" \n\t"\
139	"xor "tmp" , "ret" \n\t"
140	#endif /* HAVE_FAST_CMOV */
141
142	#define BRANCHLESS_GET_CABAC(ret, retq, statep, low, lowword, range, rangeq, tmp, tmpbyte, byte, end, norm_off, lps_off, mlps_off, tables) \
143	"movzbl "statep" , "ret" \n\t"\
144	"mov "range" , "tmp" \n\t"\
145	"and $0xC0 , "range" \n\t"\
146	"movzbl "MANGLE(ff_h264_cabac_tables)"+"lps_off"("ret", "range", 2), "range" \n\t"\
147	"sub "range" , "tmp" \n\t"\
148	BRANCHLESS_GET_CABAC_UPDATE(ret, low, range, tmp) \
149	"movzbl "MANGLE(ff_h264_cabac_tables)"+"norm_off"("range"), %%ecx \n\t"\
150	"shl %%cl , "range" \n\t"\
151	"movzbl "MANGLE(ff_h264_cabac_tables)"+"mlps_off"+128("ret"), "tmp" \n\t"\
152	"shl %%cl , "low" \n\t"\
153	"mov "tmpbyte" , "statep" \n\t"\
154	"test "lowword" , "lowword" \n\t"\
155	" jnz 2f \n\t"\
156	"mov "byte" , %%"REG_c" \n\t"\
157	END_CHECK(end)\
158	"add"OPSIZE" $2 , "byte" \n\t"\
159	"1: \n\t"\
160	"movzwl (%%"REG_c") , "tmp" \n\t"\
161	"lea -1("low") , %%ecx \n\t"\
162	"xor "low" , %%ecx \n\t"\
163	"shr $15 , %%ecx \n\t"\
164	"bswap "tmp" \n\t"\
165	"shr $15 , "tmp" \n\t"\
166	"movzbl "MANGLE(ff_h264_cabac_tables)"+"norm_off"(%%ecx), %%ecx \n\t"\
167	"sub $0xFFFF , "tmp" \n\t"\
168	"neg %%ecx \n\t"\
169	"add $7 , %%ecx \n\t"\
170	"shl %%cl , "tmp" \n\t"\
171	"add "tmp" , "low" \n\t"\
172	"2: \n\t"
173
174	#endif /* BROKEN_RELOCATIONS */
175
176	#if HAVE_7REGS && !BROKEN_COMPILER
177	#define get_cabac_inline get_cabac_inline_x86
178	static av_always_inline int get_cabac_inline_x86(CABACContext *c,
179	uint8_t *const state)
180	{
181	int bit, tmp;
182	#ifdef BROKEN_RELOCATIONS
183	void *tables;
184
185	__asm__ volatile(
186	"lea "MANGLE(ff_h264_cabac_tables)", %0 \n\t"
187	: "=&r"(tables)
188	: NAMED_CONSTRAINTS_ARRAY(ff_h264_cabac_tables)
189	);
190	#endif
191
192	__asm__ volatile(
193	BRANCHLESS_GET_CABAC("%0", "%q0", "(%4)", "%1", "%w1",
194	"%2", "%q2", "%3", "%b3",
195	"%c6(%5)", "%c7(%5)",
196	AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
197	AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
198	AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
199	"%8")
200	: "=&r"(bit), "=&r"(c->low), "=&r"(c->range), "=&q"(tmp)
201	: "r"(state), "r"(c),
202	"i"(offsetof(CABACContext, bytestream)),
203	"i"(offsetof(CABACContext, bytestream_end))
204	TABLES_ARG
205	,"1"(c->low), "2"(c->range)
206	: "%"REG_c, "memory"
207	);
208	return bit & 1;
209	}
210	#endif /* HAVE_7REGS && !BROKEN_COMPILER */
211
212	#if !BROKEN_COMPILER
213	#define get_cabac_bypass_sign get_cabac_bypass_sign_x86
214	static av_always_inline int get_cabac_bypass_sign_x86(CABACContext *c, int val)
215	{
216	x86_reg tmp;
217	__asm__ volatile(
218	"movl %c6(%2), %k1 \n\t"
219	"movl %c3(%2), %%eax \n\t"
220	"shl $17, %k1 \n\t"
221	"add %%eax, %%eax \n\t"
222	"sub %k1, %%eax \n\t"
223	"cdq \n\t"
224	"and %%edx, %k1 \n\t"
225	"add %k1, %%eax \n\t"
226	"xor %%edx, %%ecx \n\t"
227	"sub %%edx, %%ecx \n\t"
228	"test %%ax, %%ax \n\t"
229	"jnz 1f \n\t"
230	"mov %c4(%2), %1 \n\t"
231	"subl $0xFFFF, %%eax \n\t"
232	"movzwl (%1), %%edx \n\t"
233	"bswap %%edx \n\t"
234	"shrl $15, %%edx \n\t"
235	#if UNCHECKED_BITSTREAM_READER
236	"add $2, %1 \n\t"
237	"addl %%edx, %%eax \n\t"
238	"mov %1, %c4(%2) \n\t"
239	#else
240	"addl %%edx, %%eax \n\t"
241	"cmp %c5(%2), %1 \n\t"
242	"jge 1f \n\t"
243	"add"OPSIZE" $2, %c4(%2) \n\t"
244	#endif
245	"1: \n\t"
246	"movl %%eax, %c3(%2) \n\t"
247
248	: "+c"(val), "=&r"(tmp)
249	: "r"(c),
250	"i"(offsetof(CABACContext, low)),
251	"i"(offsetof(CABACContext, bytestream)),
252	"i"(offsetof(CABACContext, bytestream_end)),
253	"i"(offsetof(CABACContext, range))
254	: "%eax", "%edx", "memory"
255	);
256	return val;
257	}
258
259	#define get_cabac_bypass get_cabac_bypass_x86
260	static av_always_inline int get_cabac_bypass_x86(CABACContext *c)
261	{
262	x86_reg tmp;
263	int res;
264	__asm__ volatile(
265	"movl %c6(%2), %k1 \n\t"
266	"movl %c3(%2), %%eax \n\t"
267	"shl $17, %k1 \n\t"
268	"add %%eax, %%eax \n\t"
269	"sub %k1, %%eax \n\t"
270	"cdq \n\t"
271	"and %%edx, %k1 \n\t"
272	"add %k1, %%eax \n\t"
273	"inc %%edx \n\t"
274	"test %%ax, %%ax \n\t"
275	"jnz 1f \n\t"
276	"mov %c4(%2), %1 \n\t"
277	"subl $0xFFFF, %%eax \n\t"
278	"movzwl (%1), %%ecx \n\t"
279	"bswap %%ecx \n\t"
280	"shrl $15, %%ecx \n\t"
281	"addl %%ecx, %%eax \n\t"
282	"cmp %c5(%2), %1 \n\t"
283	"jge 1f \n\t"
284	"add"OPSIZE" $2, %c4(%2) \n\t"
285	"1: \n\t"
286	"movl %%eax, %c3(%2) \n\t"
287
288	: "=&d"(res), "=&r"(tmp)
289	: "r"(c),
290	"i"(offsetof(CABACContext, low)),
291	"i"(offsetof(CABACContext, bytestream)),
292	"i"(offsetof(CABACContext, bytestream_end)),
293	"i"(offsetof(CABACContext, range))
294	: "%eax", "%ecx", "memory"
295	);
296	return res;
297	}
298	#endif /* !BROKEN_COMPILER */
299
300	#endif /* HAVE_INLINE_ASM */
301	#endif /* AVCODEC_X86_CABAC_H */