File: host-and-device.cu

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (27 lines) | stat: -rw-r--r-- 774 bytes parent folder | download | duplicates (12) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
 
// Checks that a function is available in both __host__ and __device__
// RUN: cat %s | clang-repl --cuda | FileCheck %s

extern "C" int printf(const char*, ...);

__host__ __device__ inline int sum(int a, int b){ return a + b; }
__global__ void kernel(int * output){ *output = sum(40,2); }

printf("Host sum: %d\n", sum(41,1));
// CHECK: Host sum: 42

int var = 0;
int * deviceVar;
printf("cudaMalloc: %d\n", cudaMalloc((void **) &deviceVar, sizeof(int)));
// CHECK-NEXT: cudaMalloc: 0

kernel<<<1,1>>>(deviceVar);
printf("CUDA Error: %d\n", cudaGetLastError());
// CHECK-NEXT: CUDA Error: 0

printf("cudaMemcpy: %d\n", cudaMemcpy(&var, deviceVar, sizeof(int), cudaMemcpyDeviceToHost));
// CHECK-NEXT: cudaMemcpy: 0

printf("var: %d\n", var);
// CHECK-NEXT: var: 42

%quit