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      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 #ifndef  ARMV8
     38 static __inline WORD32 CLIP_U8(WORD32 x)
     39 {
     40     asm("usat %0, #8, %1" : "=r"(x) : "r"(x));
     41     return x;
     42 }
     43 
     44 static __inline WORD32 CLIP_S8(WORD32 x)
     45 {
     46     asm("ssat %0, #8, %1" : "=r"(x) : "r"(x));
     47     return x;
     48 }
     49 
     50 static __inline WORD32 CLIP_U10(WORD32 x)
     51 {
     52     asm("usat %0, #10, %1" : "=r"(x) : "r"(x));
     53     return x;
     54 }
     55 
     56 static __inline WORD32 CLIP_S10(WORD32 x)
     57 {
     58     asm("ssat %0, #10, %1" : "=r"(x) : "r"(x));
     59     return x;
     60 }
     61 
     62 static __inline WORD32 CLIP_U12(WORD32 x)
     63 {
     64     asm("usat %0, #12, %1" : "=r"(x) : "r"(x));
     65     return x;
     66 }
     67 
     68 static __inline WORD32 CLIP_S12(WORD32 x)
     69 {
     70     asm("ssat %0, #12, %1" : "=r"(x) : "r"(x));
     71     return x;
     72 }
     73 
     74 static __inline WORD32 CLIP_U16(WORD32 x)
     75 {
     76     asm("usat %0, #16, %1" : "=r"(x) : "r"(x));
     77     return x;
     78 }
     79 static __inline WORD32 CLIP_S16(WORD32 x)
     80 {
     81     asm("ssat %0, #16, %1" : "=r"(x) : "r"(x));
     82     return x;
     83 }
     84 
     85 
     86 static __inline UWORD32 ITT_BIG_ENDIAN(UWORD32 x)
     87 {
     88     asm("rev %0, %1" : "=r"(x) : "r"(x));
     89     return x;
     90 }
     91 #else
     92 
     93 #define CLIP_U8(x) CLIP3((x), 0,     255)
     94 #define CLIP_S8(x) CLIP3((x), -128,  127)
     95 
     96 #define CLIP_U10(x) CLIP3((x), 0,     1023);
     97 #define CLIP_S10(x) CLIP3((x), -512,  511);
     98 
     99 #define CLIP_U12(x) CLIP3((x), 0,     4095);
    100 #define CLIP_S12(x) CLIP3((x), -2048,  2047);
    101 
    102 #define CLIP_U16(x) CLIP3((x), 0,        65535)
    103 #define CLIP_S16(x) CLIP3((x), -32768,   32767)
    104 
    105 #define ITT_BIG_ENDIAN(x)   ((x & 0x000000ff) << 24)                |   \
    106                             ((x & 0x0000ff00) << 8)    |   \
    107                             ((x & 0x00ff0000) >> 8)    |   \
    108                             ((UWORD32)x >> 24);
    109 #endif
    110 
    111 #define SHL(x,y) (((y) < 32) ? ((x) << (y)) : 0)
    112 #define SHR(x,y) (((y) < 32) ? ((x) >> (y)) : 0)
    113 
    114 #define SHR_NEG(val,shift)  ((shift>0)?(val>>shift):(val<<(-shift)))
    115 #define SHL_NEG(val,shift)  ((shift<0)?(val>>(-shift)):(val<<shift))
    116 
    117 #define INLINE inline
    118 
    119 static INLINE UWORD32 CLZ(UWORD32 u4_word)
    120 {
    121     if(u4_word)
    122         return (__builtin_clz(u4_word));
    123     else
    124         return 32;
    125 }
    126 static INLINE UWORD32 CTZ(UWORD32 u4_word)
    127 {
    128     if(0 == u4_word)
    129         return 31;
    130     else
    131     {
    132         unsigned int index;
    133         index = __builtin_ctz(u4_word);
    134         return (UWORD32)index;
    135     }
    136 }
    137 
    138 
    139 
    140 
    141 #define NOP(nop_cnt)    {UWORD32 nop_i; for (nop_i = 0; nop_i < nop_cnt; nop_i++);}
    142 
    143 
    144 
    145 #define MEM_ALIGN8 __attribute__ ((aligned (8)))
    146 #define MEM_ALIGN16 __attribute__ ((aligned (16)))
    147 #define MEM_ALIGN32 __attribute__ ((aligned (32)))
    148 
    149 #endif /* _IHEVC_PLATFORM_MACROS_H_ */
    150