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#include "Halide.h"
#include <stdio.h>
using namespace Halide;
Expr u8(Expr a) {
return cast<uint8_t>(a);
}
Expr u16(Expr a) {
return cast<uint16_t>(a);
}
int main(int argc, char **argv) {
Buffer<uint8_t> input(128, 64);
for (int y = 0; y < input.height(); y++) {
for (int x = 0; x < input.width(); x++) {
input(x, y) = y * input.width() + x;
}
}
Var x, y, xi, yi;
{
Func f;
f(x, y) = select(((input(x, y) > 10) && (input(x, y) < 20)) ||
((input(x, y) > 40) && (!(input(x, y) > 50))),
u8(255), u8(0));
Target target = get_jit_target_from_environment();
if (target.has_gpu_feature()) {
f.gpu_tile(x, y, xi, yi, 16, 16);
f.vectorize(xi, 4);
} else if (target.has_feature(Target::HVX)) {
f.hexagon().vectorize(x, 128);
} else {
f.vectorize(x, 8);
}
Buffer<uint8_t> output = f.realize({input.width(), input.height()}, target);
for (int y = 0; y < input.height(); y++) {
for (int x = 0; x < input.width(); x++) {
bool cond = ((input(x, y) > 10) && (input(x, y) < 20)) ||
((input(x, y) > 40) && (!(input(x, y) > 50)));
uint8_t correct = cond ? 255 : 0;
if (correct != output(x, y)) {
fprintf(stderr, "output(%d, %d) = %d instead of %d\n", x, y, output(x, y), correct);
return 1;
}
}
}
}
// Test a condition that uses a let resulting from common
// subexpression elimination.
{
Func f;
Expr common_cond = input(x, y) > 10;
f(x, y) = select((common_cond && (input(x, y) < 20)) ||
((input(x, y) > 40) && (!common_cond)),
u8(255), u8(0));
Target target = get_jit_target_from_environment();
if (target.has_gpu_feature()) {
f.gpu_tile(x, y, xi, yi, 16, 16);
f.vectorize(xi, 4);
} else if (target.has_feature(Target::HVX)) {
f.hexagon().vectorize(x, 128);
} else {
f.vectorize(x, 8);
}
Buffer<uint8_t> output = f.realize({input.width(), input.height()}, target);
for (int y = 0; y < input.height(); y++) {
for (int x = 0; x < input.width(); x++) {
bool common_cond = input(x, y) > 10;
bool cond = (common_cond && (input(x, y) < 20)) ||
((input(x, y) > 40) && (!common_cond));
uint8_t correct = cond ? 255 : 0;
if (correct != output(x, y)) {
fprintf(stderr, "output(%d, %d) = %d instead of %d\n", x, y, output(x, y), correct);
return 1;
}
}
}
}
// Test a condition which has vector and scalar inputs.
{
Func f("f");
f(x, y) = select(x < 10 || x > 20 || y < 10 || y > 20, 0, input(x, y));
Target target = get_jit_target_from_environment();
if (target.has_gpu_feature()) {
f.gpu_tile(x, y, xi, yi, 16, 16);
f.vectorize(xi, 4);
} else if (target.has_feature(Target::HVX)) {
f.hexagon().vectorize(x, 128);
} else {
f.vectorize(x, 128);
}
Buffer<uint8_t> output = f.realize({input.width(), input.height()}, target);
for (int y = 0; y < input.height(); y++) {
for (int x = 0; x < input.width(); x++) {
bool cond = x < 10 || x > 20 || y < 10 || y > 20;
uint8_t correct = cond ? 0 : input(x, y);
if (correct != output(x, y)) {
fprintf(stderr, "output(%d, %d) = %d instead of %d\n", x, y, output(x, y), correct);
return 1;
}
}
}
}
// Test a condition that uses differently sized types.
{
Func f;
Expr ten = 10;
f(x, y) = select(input(x, y) > ten, u8(255), u8(0));
Target target = get_jit_target_from_environment();
if (target.has_gpu_feature()) {
f.gpu_tile(x, y, xi, yi, 16, 16);
f.vectorize(xi, 4);
} else if (target.has_feature(Target::HVX)) {
f.hexagon().vectorize(x, 128);
} else {
f.vectorize(x, 8);
}
Buffer<uint8_t> output = f.realize({input.width(), input.height()}, target);
for (int y = 0; y < input.height(); y++) {
for (int x = 0; x < input.width(); x++) {
bool cond = input(x, y) > 10;
uint8_t correct = cond ? 255 : 0;
if (correct != output(x, y)) {
fprintf(stderr, "output(%d, %d) = %d instead of %d\n", x, y, output(x, y), correct);
return 1;
}
}
}
}
// Test a select where the condition has a different width than
// the true/false values.
for (int w = 8; w <= 32; w *= 2) {
for (int n = 8; n < w; n *= 2) {
Type narrow = UInt(n), wide = UInt(w);
Func in_wide;
in_wide(x, y) = cast(wide, y + x * 3);
in_wide.compute_root();
Func in_narrow;
in_narrow(x, y) = cast(narrow, x * y + x - 17);
in_narrow.compute_root();
Func f;
f(x, y) = select(in_narrow(x, y) > 10, in_wide(x, y * 2), in_wide(x, y * 2 + 1));
Func cpu;
cpu(x, y) = f(x, y);
Func gpu;
gpu(x, y) = f(x, y);
Func out;
out(x, y) = {cast<uint32_t>(cpu(x, y)), cast<uint32_t>(gpu(x, y))};
cpu.compute_root();
gpu.compute_root();
Target target = get_jit_target_from_environment();
if (target.has_feature(Target::OpenCL) && n == 16 && w == 32) {
// Workaround for https://github.com/halide/Halide/issues/2477
printf("Skipping uint%d -> uint%d for OpenCL\n", n, w);
continue;
}
if (target.has_gpu_feature()) {
gpu.gpu_tile(x, y, xi, yi, 16, 16);
gpu.vectorize(xi, 4);
} else if (target.has_feature(Target::HVX)) {
gpu.hexagon().vectorize(x, 128);
} else {
// Just test vectorization
gpu.vectorize(x, 8);
}
Realization r = out.realize({input.width(), input.height()}, target);
Buffer<uint32_t> cpu_output = r[0];
Buffer<uint32_t> gpu_output = r[1];
for (int y = 0; y < input.height(); y++) {
for (int x = 0; x < input.width(); x++) {
if (cpu_output(x, y) != gpu_output(x, y)) {
fprintf(stderr, "gpu_output(%d, %d) = %d instead of %d for uint%d -> uint%d\n",
x, y, gpu_output(x, y), cpu_output(x, y), n, w);
return 1;
}
}
}
}
}
printf("Success!\n");
return 0;
}
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