ihevc_platform_macros.h revision 707042fda96ebede81408b854385173483798bcd 
1/******************************************************************************
2*
3* Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore
4*
5* Licensed under the Apache License, Version 2.0 (the "License");
6* you may not use this file except in compliance with the License.
7* You may obtain a copy of the License at:
8*
9* http://www.apache.org/licenses/LICENSE-2.0
10*
11* Unless required by applicable law or agreed to in writing, software
12* distributed under the License is distributed on an "AS IS" BASIS,
13* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14* See the License for the specific language governing permissions and
15* limitations under the License.
16*
17******************************************************************************/
18/**
19*******************************************************************************
20* @file
21*  ihevc_platform_macros.h
22*
23* @brief
24*  Platform specific Macro definitions used in the codec
25*
26* @author
27*  Ittiam
28*
29* @remarks
30*  None
31*
32*******************************************************************************
33*/
34#ifndef _IHEVC_PLATFORM_MACROS_H_
35#define _IHEVC_PLATFORM_MACROS_H_
36
37
38#define CLIP_U8(x) CLIP3((x), 0,     255)
39#define CLIP_S8(x) CLIP3((x), -128,  127)
40
41#define CLIP_U10(x) CLIP3((x), 0,     1023);
42#define CLIP_S10(x) CLIP3((x), -512,  511);
43
44#define CLIP_U12(x) CLIP3((x), 0,     4095);
45#define CLIP_S12(x) CLIP3((x), -2048,  2047);
46
47#define CLIP_U16(x) CLIP3((x), 0,        65535)
48#define CLIP_S16(x) CLIP3((x), -32768,   32767)
49
50#define ITT_BIG_ENDIAN(x)   ((x << 24))                |   \
51                            ((x & 0x0000ff00) << 8)    |   \
52                            ((x & 0x00ff0000) >> 8)    |   \
53                            ((UWORD32)x >> 24);
54
55#define SHL(x,y) (((y) < 32) ? ((x) << (y)) : 0)
56#define SHR(x,y) (((y) < 32) ? ((x) >> (y)) : 0)
57
58#define SHR_NEG(val,shift)  ((shift>0)?(val>>shift):(val<<(-shift)))
59#define SHL_NEG(val,shift)  ((shift<0)?(val>>(-shift)):(val<<shift))
60
61static inline UWORD32 CLZ(UWORD32 x)
62{
63    asm("clz %0, %1" : "=r"(x) : "r"(x));
64    return x;
65}
66
67static inline UWORD32 CTZ(UWORD32 u4_word)
68{
69    if(0 == u4_word)
70        return 31;
71    else
72    {
73        unsigned int index;
74        index = __builtin_ctz(u4_word);
75        return (UWORD32)index;
76    }
77}
78
79#define NOP(nop_cnt)    {UWORD32 nop_i; for (nop_i = 0; nop_i < nop_cnt; nop_i++);}
80
81#define INLINE
82
83#define MEM_ALIGN8 __attribute__ ((aligned (8)))
84#define MEM_ALIGN16 __attribute__ ((aligned (16)))
85#define MEM_ALIGN32 __attribute__ ((aligned (32)))
86
87#endif /* _IHEVC_PLATFORM_MACROS_H_ */
88