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