swar-4x8b-pragma2.c
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/* -----------------------------------------------------------------------------
* Copyright (C) 2018-2020 daiteq s.r.o. http://www.daiteq.com
*
* This program is distributed WITHOUT ANY WARRANTY; without even
* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE.
*
* -----------------------------------------------------------------------------
* Filename : swar-4x8b-pragma2.c
* Authors : Roman Bartosinski
* Description : simple test of clang/LLVM compiler with SWAR extension
* Release :
* Version :
* Date :
* -----------------------------------------------------------------------------
*/
////A: --has-swar
//C: -daiteq-swar-enable
//#include <stdio.h>
typedef unsigned int su4x8b __attribute__((subword(8)));
#define LEN 3
//const su4x8b a[LEN] = { 0x04030201, 0x08070605, 0x0C0B0A09 };
const su4x8b a[LEN] = {{1,2,3,4}, {5,6,7,8}, {9,10,11,12}};
su4x8b b[LEN]; // = {{10,20,30,40},{50,60,70,80},{90,100,110,120}};
su4x8b z[LEN]; // = {{0},{1},{10}};
void do_4x8b_add(void)
{
for(int i=0;i<LEN;++i) {
z[i] = a[i] + b[i];
}
#pragma swar saturate
for(int i=2;i>=0;--i) {
z[i] = a[i] + b[i];
}
for(int i=2;i>=0;--i) {
z[i] = a[i] + b[i];
}
}
int main(void)
{
volatile unsigned long a;
//__builtin_swarctrl(0);
a = __builtin_swaraccum(0);
a = __builtin_swaraccum(1);
a = __builtin_swaraccum(2);
a = __builtin_swaraccum(3);
do_4x8b_add();
a = __builtin_swaraccum(0);
a = __builtin_swaraccum(1);
a = __builtin_swaraccum(2);
a = __builtin_swaraccum(3);
return 0;
}