1/*
2 * Copyright (C) 2004-2010 NXP Software
3 * Copyright (C) 2010 The Android Open Source Project
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#ifndef _LVM_MACROS_H_
19#define _LVM_MACROS_H_
20
21#ifdef __cplusplus
22extern "C" {
23#endif /* __cplusplus */
24
25/**********************************************************************************
26   MUL32x32INTO32(A,B,C,ShiftR)
27        C = (A * B) >> ShiftR
28
29        A, B and C are all 32 bit SIGNED numbers and ShiftR can vary from 0 to 64
30
31        The user has to take care that C does not overflow.  The result in case
32        of overflow is undefined.
33
34***********************************************************************************/
35#ifndef MUL32x32INTO32
36#define MUL32x32INTO32(A,B,C,ShiftR)   \
37        {LVM_INT32 MUL32x32INTO32_temp,MUL32x32INTO32_temp2,MUL32x32INTO32_mask,MUL32x32INTO32_HH,MUL32x32INTO32_HL,MUL32x32INTO32_LH,MUL32x32INTO32_LL;\
38         LVM_INT32  shiftValue;\
39        shiftValue = (ShiftR);\
40        MUL32x32INTO32_mask=0x0000FFFF;\
41        MUL32x32INTO32_HH= ((LVM_INT32)((LVM_INT16)((A)>>16))*((LVM_INT16)((B)>>16)) );\
42        MUL32x32INTO32_HL= ((LVM_INT32)((B)&MUL32x32INTO32_mask)*((LVM_INT16)((A)>>16))) ;\
43        MUL32x32INTO32_LH= ((LVM_INT32)((A)&MUL32x32INTO32_mask)*((LVM_INT16)((B)>>16)));\
44        MUL32x32INTO32_LL= (LVM_INT32)((A)&MUL32x32INTO32_mask)*(LVM_INT32)((B)&MUL32x32INTO32_mask);\
45        MUL32x32INTO32_temp= (LVM_INT32)(MUL32x32INTO32_HL&MUL32x32INTO32_mask)+(LVM_INT32)(MUL32x32INTO32_LH&MUL32x32INTO32_mask)+(LVM_INT32)((MUL32x32INTO32_LL>>16)&MUL32x32INTO32_mask);\
46        MUL32x32INTO32_HH= MUL32x32INTO32_HH+(LVM_INT32)(MUL32x32INTO32_HL>>16)+(LVM_INT32)(MUL32x32INTO32_LH>>16)+(LVM_INT32)(MUL32x32INTO32_temp>>16);\
47        MUL32x32INTO32_LL=MUL32x32INTO32_LL+(LVM_INT32)(MUL32x32INTO32_HL<<16)+(LVM_INT32)(MUL32x32INTO32_LH<<16);\
48        if(shiftValue<32)\
49        {\
50        MUL32x32INTO32_HH=MUL32x32INTO32_HH<<(32-shiftValue);\
51        MUL32x32INTO32_mask=((LVM_INT32)1<<(32-shiftValue))-1;\
52        MUL32x32INTO32_LL=(MUL32x32INTO32_LL>>shiftValue)&MUL32x32INTO32_mask;\
53        MUL32x32INTO32_temp2=MUL32x32INTO32_HH|MUL32x32INTO32_LL;\
54        }\
55        else\
56       {\
57        MUL32x32INTO32_temp2=(LVM_INT32)MUL32x32INTO32_HH>>(shiftValue-32);\
58       }\
59       (C) = MUL32x32INTO32_temp2;\
60       }
61#endif
62
63/**********************************************************************************
64   MUL32x16INTO32(A,B,C,ShiftR)
65        C = (A * B) >> ShiftR
66
67        A and C are 32 bit SIGNED numbers.  B is a 16 bit SIGNED number.
68        ShiftR can vary from 0 to 48
69
70        The user has to take care that C does not overflow.  The result in case
71        of overflow is undefined.
72
73***********************************************************************************/
74#ifndef MUL32x16INTO32
75#define MUL32x16INTO32(A,B,C,ShiftR)   \
76        {LVM_INT32 MUL32x16INTO32_mask,MUL32x16INTO32_HH,MUL32x16INTO32_LL;\
77         LVM_INT32  shiftValue;\
78        shiftValue = (ShiftR);\
79        MUL32x16INTO32_mask=0x0000FFFF;\
80        MUL32x16INTO32_HH= ((LVM_INT32)(B)*((LVM_INT16)((A)>>16)));\
81        MUL32x16INTO32_LL= ((LVM_INT32)((A)&MUL32x16INTO32_mask)*(B));\
82        if(shiftValue<16)\
83        {\
84        MUL32x16INTO32_HH=(LVM_INT32)((LVM_UINT32)MUL32x16INTO32_HH<<(16-shiftValue));\
85        (C)=MUL32x16INTO32_HH+(LVM_INT32)(MUL32x16INTO32_LL>>shiftValue);\
86        }\
87        else if(shiftValue<32) {\
88        MUL32x16INTO32_HH=(LVM_INT32)(MUL32x16INTO32_HH>>(shiftValue-16));\
89        (C)=MUL32x16INTO32_HH+(LVM_INT32)(MUL32x16INTO32_LL>>shiftValue);\
90        }\
91        else {\
92        (C)=MUL32x16INTO32_HH>>(shiftValue-16);}\
93        }
94#endif
95
96/**********************************************************************************
97   ADD2_SAT_32x32(A,B,C)
98        C = SAT(A + B)
99
100        A,B and C are 32 bit SIGNED numbers.
101***********************************************************************************/
102#ifndef ADD2_SAT_32x32
103#define ADD2_SAT_32x32(A,B,C)   \
104        {(C)=(A)+(B);\
105         if ((((C) ^ (A)) & ((C) ^ (B))) >> 31)\
106            {\
107                if((A)<0)\
108                    (C)=0x80000000l;\
109                else\
110                    (C)=0x7FFFFFFFl;\
111            }\
112        }
113#endif
114
115
116#ifdef __cplusplus
117}
118#endif /* __cplusplus */
119
120#endif /* _LVM_MACROS_H_ */
121
122/*** End of file ******************************************************************/
123