yum-mirror/slang

Making it easier to work with shaders

git clone https://git.yummers.dev/yum-mirror/slang

Sai Praveen BangaruFix CFG reversal logic for loops (#4162)5ceb8569b

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1//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
2//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
3//TEST(compute):COMPARE_COMPUTE_EX:-cpu -compute -output-using-type -shaderobj
4
5//TEST_INPUT:ubuffer(data=[0 0 0 0 0], stride=4):out,name=outputBuffer
6RWStructuredBuffer<float> outputBuffer;
7
8typedef DifferentialPair<float> dpfloat;
9typedef float.Differential dfloat;
10
11struct P
12{
13    bool terminated;
14    bool isTerminated() { return terminated; }
15    bool isHit() { return !terminated; }
16}
17
18[BackwardDifferentiable]
19float test_simple_while(float y)
20{
21    float t = y;
22    P p;
23    p.terminated = false;
24    int i = 2;
25
26    [MaxIters(3)]
27    while (!p.isTerminated())
28    {
29        i++;
30        if (p.isHit())
31        {
32            if (p.isTerminated()) break;
33            t = t * t;
34            p.terminated = (i < 5);
35        }
36        else
37        {
38            t = t + 1.0;
39        }
40    }
41
42    return t;
43}
44
45[numthreads(1, 1, 1)]
46void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
47{
48    {
49        dpfloat dpa = dpfloat(1.0, 0.0);
50
51        __bwd_diff(test_simple_while)(dpa, 1.0f);
52        outputBuffer[0] = dpa.d; // Expect: 8.0
53    }
54}