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#include "Halide.h"
#include "HalideBuffer.h"
using namespace Halide;
Halide::Runtime::Buffer<int32_t> make_gpu_buffer(bool hexagon_rpc) {
Var x, y;
Func f;
f(x, y) = x + y * 256;
if (hexagon_rpc) {
f.hexagon();
} else {
Var xi, yi;
f.gpu_tile(x, y, xi, yi, 8, 8);
}
Buffer<int32_t> result = f.realize({128, 128});
return *result.get();
}
int main(int argc, char **argv) {
Target target = get_jit_target_from_environment();
bool hexagon_rpc = (target.arch != Target::Hexagon) &&
target.has_feature(Target::HVX);
if (!hexagon_rpc && !target.has_gpu_feature()) {
printf("[SKIP] No GPU target enabled.\n");
return 0;
}
if (target.has_feature(Target::OpenGLCompute)) {
printf("Skipping test for OpenGLCompute, as it does not support device crops, slices, or copies\n");
return 0;
}
printf("Test in-place cropping.\n");
{
Halide::Runtime::Buffer<int32_t> gpu_buf = make_gpu_buffer(hexagon_rpc);
assert(gpu_buf.raw_buffer()->device_interface != nullptr);
gpu_buf.crop({{32, 64}, {32, 64}});
assert(gpu_buf.raw_buffer()->device_interface != nullptr);
gpu_buf.copy_to_host();
for (int i = 0; i < 64; i++) {
for (int j = 0; j < 64; j++) {
assert(gpu_buf(32 + i, 32 + j) == (i + 32) + 256 * (j + 32));
}
}
}
printf("Test nondestructive cropping.\n");
{
Halide::Runtime::Buffer<int32_t> gpu_buf = make_gpu_buffer(hexagon_rpc);
assert(gpu_buf.raw_buffer()->device_interface != nullptr);
Halide::Runtime::Buffer<int32_t> cropped = gpu_buf.cropped({{32, 64}, {32, 64}});
assert(cropped.raw_buffer()->device_interface != nullptr);
cropped.copy_to_host();
for (int i = 0; i < 64; i++) {
for (int j = 0; j < 64; j++) {
assert(cropped(32 + i, 32 + j) == (i + 32) + 256 * (j + 32));
}
}
}
printf("Test crop of a crop\n");
{
Halide::Runtime::Buffer<int32_t> gpu_buf = make_gpu_buffer(hexagon_rpc);
assert(gpu_buf.raw_buffer()->device_interface != nullptr);
Halide::Runtime::Buffer<int32_t> cropped = gpu_buf.cropped({{32, 64}, {32, 64}});
assert(cropped.raw_buffer()->device_interface != nullptr);
Halide::Runtime::Buffer<int32_t> cropped2 = cropped.cropped({{40, 16}, {40, 16}});
assert(cropped2.raw_buffer()->device_interface != nullptr);
cropped.copy_to_host();
for (int i = 0; i < 64; i++) {
for (int j = 0; j < 64; j++) {
assert(cropped(32 + i, 32 + j) == (i + 32) + 256 * (j + 32));
}
}
cropped2.copy_to_host();
for (int i = 0; i < 16; i++) {
for (int j = 0; j < 16; j++) {
assert(cropped2(40 + i, 40 + j) == (i + 40) + 256 * (j + 40));
}
}
}
printf("Test parent going out of scope before crop.\n");
{
Halide::Runtime::Buffer<int32_t> cropped;
{
Halide::Runtime::Buffer<int32_t> gpu_buf = make_gpu_buffer(hexagon_rpc);
assert(gpu_buf.raw_buffer()->device_interface != nullptr);
cropped = gpu_buf.cropped({{32, 64}, {32, 64}});
assert(cropped.raw_buffer()->device_interface != nullptr);
}
cropped.copy_to_host();
for (int i = 0; i < 64; i++) {
for (int j = 0; j < 64; j++) {
assert(cropped(32 + i, 32 + j) == (i + 32) + 256 * (j + 32));
}
}
}
printf("Test realizing to/from crop.\n");
{
ImageParam in(Int(32), 2);
Var x, y;
Func f;
f(x, y) = in(x, y) + 42;
Var xi, yi;
if (hexagon_rpc) {
f.hexagon();
} else {
f.gpu_tile(x, y, xi, yi, 8, 8);
}
Halide::Buffer<int32_t> gpu_input = make_gpu_buffer(hexagon_rpc);
Halide::Buffer<int32_t> gpu_output = make_gpu_buffer(hexagon_rpc);
gpu_input.crop({{64, 64}, {64, 64}});
gpu_output.crop({{64, 64}, {64, 64}});
in.set(gpu_input);
f.realize(gpu_output, target);
gpu_output.copy_to_host();
for (int i = 0; i < 64; i++) {
for (int j = 0; j < 64; j++) {
assert(gpu_output(64 + i, 64 + j) == (i + 64) + 256 * (j + 64) + 42);
}
}
}
printf("Success!\n");
return 0;
}
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