//

// NEONCommand.cpp

// HelloNEON

//

// Created by Silvio Fragnani da Silva on 01/05/12.

// Copyright (c) 2012 __MyCompanyName__. All rights reserved.

//

#include "NEONCommand.h"

#ifdef _ARM_ARCH_7

#include <arm_neon.h>

#endif

#ifdef _ARM_ARCH_7

void add3 (uint8x16_t *data) {

// Set each sixteen values of the vector to 3.

//

// Remark: a 'q' suffix to intrinsics indicates

// the instruction run for 128 bits registers.

//

uint8x16_t three = vmovq_n_u8 (3);

// Add 3 to the value given in argument.

*data = vaddq_u8 (*data, three);

}

void print_uint8 (uint8x16_t data, const char* name) {

int i;

static uint8_t p[16];

vst1q_u8 (p, data);

printf ("%s = ", name);

for (i = 0; i < 16; i++) {

printf ("%02d ", p[i]);

}

printf ("\n");

}

void NEONCommand::executeNEON()

{

// Create custom arbitrary data.

const uint8_t uint8_data[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };

// Create the vector with our data.

uint8x16_t data;

// Load our custom data into the vector register.

data = vld1q_u8 (uint8_data);

print_uint8(data, "data");

// Call of the add3 function.

add3(&data);

print_uint8 (data, "data (new)");

}

#endif