63 lines · c
1// This test checks that #pragma omp target update from(data1[0:3:4],2// data2[0:2:5]) correctly updates disjoint strided sections of multiple arrays3// from the device to the host.4 5// RUN: %libomptarget-compile-run-and-check-generic6#include <omp.h>7#include <stdio.h>8 9int main() {10 int len = 12;11 double data1[len], data2[len];12 13// Initial values14#pragma omp target map(tofrom : data1[0 : len], data2[0 : len])15 {16 for (int i = 0; i < len; i++) {17 data1[i] = i;18 data2[i] = i * 10;19 }20 }21 22 printf("original host array values:\n");23 printf("data1: ");24 for (int i = 0; i < len; i++)25 printf("%.1f ", data1[i]);26 printf("\ndata2: ");27 for (int i = 0; i < len; i++)28 printf("%.1f ", data2[i]);29 printf("\n\n");30 31#pragma omp target data map(to : data1[0 : len], data2[0 : len])32 {33// Modify arrays on device34#pragma omp target35 {36 for (int i = 0; i < len; i++)37 data1[i] += i;38 for (int i = 0; i < len; i++)39 data2[i] += 100;40 }41 42// data1[0:3:4] // indices 0,4,843// data2[0:2:5] // indices 0,544#pragma omp target update from(data1[0 : 3 : 4], data2[0 : 2 : 5])45 }46 47 printf("device array values after update from:\n");48 printf("data1: ");49 for (int i = 0; i < len; i++)50 printf("%.1f ", data1[i]);51 printf("\ndata2: ");52 for (int i = 0; i < len; i++)53 printf("%.1f ", data2[i]);54 printf("\n\n");55 56 // CHECK: data1: 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.057 // CHECK: data2: 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 110.058 59 // CHECK: data1: 0.0 1.0 2.0 3.0 8.0 5.0 6.0 7.0 16.0 9.0 10.0 11.060 // CHECK: data2: 100.0 10.0 20.0 30.0 40.0 150.0 60.0 70.0 80.0 90.0 100.061 // 110.062}63