test_DLBoost.c

/*
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#include <immintrin.h>
#include <iostream>

using namespace std;
// This code sample performs dot-product operations on 8-bit operands.
// The dot-product operation is performed first using single fused instruction,
// followed by the operation using a sequence of 3 instructions.
 
int main() {

   int8_t  op1_int8[64];
   int8_t  op2_int8[64];
   int     op3_int[16];
   int16_t op4_int16[32];

   __m512i v1_int8;
   __m512i v2_int8;
   __m512i v3_int;
   __m512i v4_int16;
   __m512i result;
   int* presult;

   // Choose some sample values
   for (int i = 0; i < 64; i++)
   {
       op1_int8[i]  = 3;
       op2_int8[i]  = 4;
   }
   for (int i = 0; i < 16; i++)
   {
       op3_int[i]   = 1;
   }
   for (int i = 0; i < 32; i++)
   {
       op4_int16[i] = 1;
   }

   //Load 512-bits of integer data
   v1_int8 =_mm512_load_si512(&op1_int8);
   v2_int8 =_mm512_load_si512(&op2_int8);
   v3_int =_mm512_load_si512(&op3_int);
   v4_int16 =_mm512_load_si512(&op4_int16);

   // PERFORM THE DOT PRODUCT OPERATION USING FUSED INSTRUCTION
   result = _mm512_dpbusds_epi32(v3_int,v1_int8,v2_int8);
   presult = (int*) &result;
   printf("RESULTS USING FUSED INSTRUCTION: \n ");
   for (int j = 15; j >= 0; j--)
       cout << presult[j]<<" ";
   cout << endl;
   cout << endl;

   // PERFORM THE DOT PRODUCT OPERATION USING A SEQUENCE OF 3 INSTRUCTIONS

   // Vertically multiply two 8-bit integers,
   // then horizontally add adjacent pairs of 16-bit integers

   __m512i vresult1 = _mm512_maddubs_epi16(v1_int8,v2_int8);

   // Upconvert to 32-bit and horizontally add neighbors. Multiply by 1.
   __m512i vresult2 = _mm512_madd_epi16(vresult1,v4_int16);

   // Add packed 32-bit integers
   result = _mm512_add_epi32(vresult2,v3_int);

   printf("RESULTS USING SEQUENCE OF 3 INSTRUCTIONS: \n ");
   presult = (int*) &result;
   for (int j = 15; j >= 0; j--)
       cout << presult[j]<<" ";
   cout << endl;

}