[deb_ffmpeg.git] / ffmpeg / libavcodec / arm / vp56_arith.h

/*
 * Copyright (C) 2010 Mans Rullgard <mans@mansr.com>
 *
 * 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_ARM_VP56_ARITH_H
#define AVCODEC_ARM_VP56_ARITH_H

#if CONFIG_THUMB
#   define A(x)
#   define T(x) x
#else
#   define A(x) x
#   define T(x)
#endif

#if CONFIG_THUMB || defined __clang__
#   define L(x)
#   define U(x) x
#else
#   define L(x) x
#   define U(x)
#endif

#if HAVE_ARMV6_INLINE

#define vp56_rac_get_prob vp56_rac_get_prob_armv6
static inline int vp56_rac_get_prob_armv6(VP56RangeCoder *c, int pr)
{
    unsigned shift     = ff_vp56_norm_shift[c->high];
    unsigned code_word = c->code_word << shift;
    unsigned high      = c->high << shift;
    unsigned bit;

    __asm__ ("adds    %3,  %3,  %0           \n"
             "itt     cs                     \n"
             "cmpcs   %7,  %4                \n"
           L("ldrcsh  %2,  [%4], #2          \n")
           U("ldrhcs  %2,  [%4], #2          \n")
             "rsb     %0,  %6,  #256         \n"
             "smlabb  %0,  %5,  %6,  %0      \n"
           T("itttt   cs                     \n")
             "rev16cs %2,  %2                \n"
           T("lslcs   %2,  %2,  %3           \n")
           T("orrcs   %1,  %1,  %2           \n")
           A("orrcs   %1,  %1,  %2,  lsl %3  \n")
             "subcs   %3,  %3,  #16          \n"
             "lsr     %0,  %0,  #8           \n"
             "cmp     %1,  %0,  lsl #16      \n"
             "ittte   ge                     \n"
             "subge   %1,  %1,  %0,  lsl #16 \n"
             "subge   %0,  %5,  %0           \n"
             "movge   %2,  #1                \n"
             "movlt   %2,  #0                \n"
             : "=&r"(c->high), "=&r"(c->code_word), "=&r"(bit),
               "+&r"(c->bits), "+&r"(c->buffer)
             : "r"(high), "r"(pr), "r"(c->end - 1),
               "0"(shift), "1"(code_word)
             : "cc");

    return bit;
}

#define vp56_rac_get_prob_branchy vp56_rac_get_prob_branchy_armv6
static inline int vp56_rac_get_prob_branchy_armv6(VP56RangeCoder *c, int pr)
{
    unsigned shift     = ff_vp56_norm_shift[c->high];
    unsigned code_word = c->code_word << shift;
    unsigned high      = c->high << shift;
    unsigned low;
    unsigned tmp;

    __asm__ ("adds    %3,  %3,  %0           \n"
             "itt     cs                     \n"
             "cmpcs   %7,  %4                \n"
           L("ldrcsh  %2,  [%4], #2          \n")
           U("ldrhcs  %2,  [%4], #2          \n")
             "rsb     %0,  %6,  #256         \n"
             "smlabb  %0,  %5,  %6,  %0      \n"
           T("itttt   cs                     \n")
             "rev16cs %2,  %2                \n"
           T("lslcs   %2,  %2,  %3           \n")
           T("orrcs   %1,  %1,  %2           \n")
           A("orrcs   %1,  %1,  %2,  lsl %3  \n")
             "subcs   %3,  %3,  #16          \n"
             "lsr     %0,  %0,  #8           \n"
             "lsl     %2,  %0,  #16          \n"
             : "=&r"(low), "+&r"(code_word), "=&r"(tmp),
               "+&r"(c->bits), "+&r"(c->buffer)
             : "r"(high), "r"(pr), "r"(c->end - 1), "0"(shift)
             : "cc");

    if (code_word >= tmp) {
        c->high      = high - low;
        c->code_word = code_word - tmp;
        return 1;
    }

    c->high      = low;
    c->code_word = code_word;
    return 0;
}

#endif

#endif /* AVCODEC_ARM_VP56_ARITH_H */
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* Copyright (C) 2010 Mans Rullgard <mans@mansr.com>
	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_ARM_VP56_ARITH_H
	22	#define AVCODEC_ARM_VP56_ARITH_H
	23
	24	#if CONFIG_THUMB
	25	# define A(x)
	26	# define T(x) x
	27	#else
	28	# define A(x) x
	29	# define T(x)
	30	#endif
	31
	32	#if CONFIG_THUMB \|\| defined __clang__
	33	# define L(x)
	34	# define U(x) x
	35	#else
	36	# define L(x) x
	37	# define U(x)
	38	#endif
	39
	40	#if HAVE_ARMV6_INLINE
	41
	42	#define vp56_rac_get_prob vp56_rac_get_prob_armv6
	43	static inline int vp56_rac_get_prob_armv6(VP56RangeCoder *c, int pr)
	44	{
	45	unsigned shift = ff_vp56_norm_shift[c->high];
	46	unsigned code_word = c->code_word << shift;
	47	unsigned high = c->high << shift;
	48	unsigned bit;
	49
	50	__asm__ ("adds %3, %3, %0 \n"
	51	"itt cs \n"
	52	"cmpcs %7, %4 \n"
	53	L("ldrcsh %2, [%4], #2 \n")
	54	U("ldrhcs %2, [%4], #2 \n")
	55	"rsb %0, %6, #256 \n"
	56	"smlabb %0, %5, %6, %0 \n"
	57	T("itttt cs \n")
	58	"rev16cs %2, %2 \n"
	59	T("lslcs %2, %2, %3 \n")
	60	T("orrcs %1, %1, %2 \n")
	61	A("orrcs %1, %1, %2, lsl %3 \n")
	62	"subcs %3, %3, #16 \n"
	63	"lsr %0, %0, #8 \n"
	64	"cmp %1, %0, lsl #16 \n"
65	"ittte ge \n"
66	"subge %1, %1, %0, lsl #16 \n"
67	"subge %0, %5, %0 \n"
68	"movge %2, #1 \n"
69	"movlt %2, #0 \n"
70	: "=&r"(c->high), "=&r"(c->code_word), "=&r"(bit),
71	"+&r"(c->bits), "+&r"(c->buffer)
72	: "r"(high), "r"(pr), "r"(c->end - 1),
73	"0"(shift), "1"(code_word)
74	: "cc");
75
76	return bit;
77	}
78
79	#define vp56_rac_get_prob_branchy vp56_rac_get_prob_branchy_armv6
80	static inline int vp56_rac_get_prob_branchy_armv6(VP56RangeCoder *c, int pr)
81	{
82	unsigned shift = ff_vp56_norm_shift[c->high];
83	unsigned code_word = c->code_word << shift;
84	unsigned high = c->high << shift;
85	unsigned low;
86	unsigned tmp;
87
88	__asm__ ("adds %3, %3, %0 \n"
89	"itt cs \n"
90	"cmpcs %7, %4 \n"
91	L("ldrcsh %2, [%4], #2 \n")
92	U("ldrhcs %2, [%4], #2 \n")
93	"rsb %0, %6, #256 \n"
94	"smlabb %0, %5, %6, %0 \n"
95	T("itttt cs \n")
96	"rev16cs %2, %2 \n"
97	T("lslcs %2, %2, %3 \n")
98	T("orrcs %1, %1, %2 \n")
99	A("orrcs %1, %1, %2, lsl %3 \n")
100	"subcs %3, %3, #16 \n"
101	"lsr %0, %0, #8 \n"
102	"lsl %2, %0, #16 \n"
103	: "=&r"(low), "+&r"(code_word), "=&r"(tmp),
104	"+&r"(c->bits), "+&r"(c->buffer)
105	: "r"(high), "r"(pr), "r"(c->end - 1), "0"(shift)
106	: "cc");
107
108	if (code_word >= tmp) {
109	c->high = high - low;
110	c->code_word = code_word - tmp;
111	return 1;
112	}
113
114	c->high = low;
115	c->code_word = code_word;
116	return 0;
117	}
118
119	#endif
120
121	#endif /* AVCODEC_ARM_VP56_ARITH_H */