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
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
#include "Halide.h"
using namespace Halide;
void verify(const Buffer<int32_t> &img, float compiletime_factor, float runtime_factor, int runtime_offset) {
img.for_each_element([=](int x, int y, int c) {
int expected = (int32_t)(compiletime_factor * runtime_factor * c * (x > y ? x : y)) + runtime_offset;
int actual = img(x, y, c);
assert(expected == actual);
});
}
class Example : public Generator<Example> {
public:
using Generator<Example>::Generator;
enum class SomeEnum { Foo,
Bar };
GeneratorParam<float> compiletime_factor{"compiletime_factor", 1, 0, 100};
GeneratorParam<bool> vectorize{"vectorize", true};
Input<float> runtime_factor{"runtime_factor", 1.0};
Input<int> runtime_offset{"runtime_offset", 0};
Output<Func> output{"output", Int(32), 3};
void generate() {
Func f;
f(x, y) = max(x, y);
output(x, y, c) = cast(output.type(), f(x, y) * c * compiletime_factor * runtime_factor + runtime_offset);
}
void schedule() {
output.bound(c, 0, 3).reorder(c, x, y).unroll(c);
output.specialize(vectorize).vectorize(x, natural_vector_size(output.type()));
}
private:
Var x{"x"}, y{"y"}, c{"c"};
};
int main(int argc, char **argv) {
GeneratorContext context(get_jit_target_from_environment());
const int kSize = 32;
const float kRuntimeFactor = 2.f;
const int kRuntimeOffset = 32;
{
// If you have a Generator in a visible translation unit (i.e.
// in the same source file, or visible via #include), you can
// use it directly, even if it's not registered: just call
// GeneratorContext.apply<GenType>() with values for all Inputs.
// (Note that this uses the default values for all GeneratorParams.)
auto gen = context.apply<Example>(kRuntimeFactor, kRuntimeOffset); // gen's type is std::unique_ptr<Example>
Buffer<int32_t> img = gen->realize({kSize, kSize, 3});
verify(img, gen->compiletime_factor, kRuntimeFactor, kRuntimeOffset);
}
{
// If you need to set GeneratorParams, it's a bit trickier:
// you must first create the Generator, then set the GeneratorParam(s),
// than call apply().
auto gen = context.create<Example>(); // gen's type is std::unique_ptr<Example>
// GeneratorParams must be set before calling apply()
// (you'll assert-fail if you set them later).
gen->compiletime_factor.set(2.5f);
gen->apply(kRuntimeFactor, kRuntimeOffset);
Buffer<int32_t> img = gen->realize({kSize, kSize, 3});
verify(img, gen->compiletime_factor, kRuntimeFactor, kRuntimeOffset);
}
printf("Success!\n");
return 0;
}
|
