swar-4x8b-pragma.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-pragma.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
su4x8b data_a[LEN] = {{1,2,3,4},{5,6,7,8},{9,10,11,12}};
su4x8b data_b[LEN] = {{10,20,30,40},{50,60,70,80},{90,100,110,120}};
su4x8b data_z[2*LEN] = {{0},{0},{0},{0},{0},{0}};
void do_4x8b_add(void)
{
data_z[0] = data_a[0] + data_b[0];
data_z[1] = data_a[1] + data_b[1];
data_z[2] = data_a[2] + data_b[2];
#pragma swar saturate
data_z[3] = data_a[0] + data_b[0];
data_z[4] = data_a[1] + data_b[1];
data_z[5] = data_a[2] + data_b[2];
}
int main(void)
{
volatile unsigned int 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;
}