yum-mirror/slang

Making it easier to work with shaders

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

Harsh Aggarwal (NVIDIA)Fix 7723 - Add autodiff tests (#7919)d10732742

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1//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
2//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
3//TEST(compute):COMPARE_COMPUTE_EX:-cuda -compute -shaderobj -output-using-type
4
5//TEST_INPUT:ubuffer(data=[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0], stride=4):out,name=outputBuffer
6RWStructuredBuffer<float> outputBuffer;
7
8typedef DifferentialPair<float> dpfloat;
9typedef DifferentialPair<float2> dpfloat2;
10
11[BackwardDifferentiable]
12float diffMax(float x, float y)
13{
14    return max(x, y);
15}
16
17[BackwardDifferentiable]
18float2 diffMax(float2 x, float2 y)
19{
20    return max(x, y);
21}
22
23[BackwardDifferentiable]
24float diffMin(float x, float y)
25{
26    return min(x, y);
27}
28
29[BackwardDifferentiable]
30float2 diffMin(float2 x, float2 y)
31{
32    return min(x, y);
33}
34
35[numthreads(1, 1, 1)]
36void computeMain(uint3 dispatchThreadID: SV_DispatchThreadID)
37{
38    // Test max() with x < y
39    {
40        dpfloat dpx = dpfloat(2.0, 1.0);
41        dpfloat dpy = dpfloat(5.0, -2.0);
42        dpfloat res = __fwd_diff(diffMax)(dpx, dpy);
43        outputBuffer[0] = res.p;        // Expect: 5.000000
44        outputBuffer[1] = res.d;        // Expect: -2.000000
45    }
46
47    // Test max() with x == y
48    {
49        dpfloat dpx = dpfloat(3.0, 1.0);
50        dpfloat dpy = dpfloat(3.0, -2.0);
51        dpfloat res = __fwd_diff(diffMax)(dpx, dpy);
52        outputBuffer[2] = res.p;        // Expect: 3.000000
53        outputBuffer[3] = res.d;        // Expect: -0.500000 (average of 1.0 and -2.0)
54    }
55
56    // Test min() with x > y
57    {
58        dpfloat dpx = dpfloat(5.0, 1.0);
59        dpfloat dpy = dpfloat(2.0, -2.0);
60        dpfloat res = __fwd_diff(diffMin)(dpx, dpy);
61        outputBuffer[4] = res.p;        // Expect: 2.000000
62        outputBuffer[5] = res.d;        // Expect: -2.000000
63    }
64
65    // Test min() with x == y
66    {
67        dpfloat dpx = dpfloat(3.0, 1.0);
68        dpfloat dpy = dpfloat(3.0, -2.0);
69        dpfloat res = __fwd_diff(diffMin)(dpx, dpy);
70        outputBuffer[6] = res.p;        // Expect: 3.000000
71        outputBuffer[7] = res.d;        // Expect: -0.500000 (average of 1.0 and -2.0)
72    }
73
74    // Test backward-mode max() with x == y
75    {
76        dpfloat dpx = dpfloat(3.0, 0.0);
77        dpfloat dpy = dpfloat(3.0, 0.0);
78        __bwd_diff(diffMax)(dpx, dpy, 1.0);
79        outputBuffer[8] = dpx.d;        // Expect: 0.500000 (half of gradient)
80        outputBuffer[9] = dpy.d;        // Expect: 0.500000 (half of gradient)
81    }
82
83    // Test backward-mode min() with x == y
84    {
85        dpfloat dpx = dpfloat(3.0, 0.0);
86        dpfloat dpy = dpfloat(3.0, 0.0);
87        __bwd_diff(diffMin)(dpx, dpy, 1.0);
88        outputBuffer[10] = dpx.d;       // Expect: 0.500000 (half of gradient)
89        outputBuffer[11] = dpy.d;       // Expect: 0.500000 (half of gradient)
90    }
91
92    // Test vector max() with x == y
93    {
94        dpfloat2 dpx = dpfloat2(float2(3.0, 4.0), float2(1.0, 2.0));
95        dpfloat2 dpy = dpfloat2(float2(3.0, 2.0), float2(-2.0, -3.0));
96        dpfloat2 res = __fwd_diff(diffMax)(dpx, dpy);
97        outputBuffer[12] = res.p[0];    // Expect: 3.000000
98        outputBuffer[13] = res.d[0];    // Expect: -0.500000 (average of 1.0 and -2.0)
99        outputBuffer[14] = res.p[1];    // Expect: 4.000000
100        outputBuffer[15] = res.d[1];    // Expect: 2.000000
101    }
102
103    // Test vector min() with x == y
104    {
105        dpfloat2 dpx = dpfloat2(float2(3.0, 4.0), float2(1.0, 2.0));
106        dpfloat2 dpy = dpfloat2(float2(3.0, 2.0), float2(-2.0, -3.0));
107        dpfloat2 res = __fwd_diff(diffMin)(dpx, dpy);
108        outputBuffer[16] = res.p[0];    // Expect: 3.000000
109        outputBuffer[17] = res.d[0];    // Expect: -0.500000 (average of 1.0 and -2.0)
110        outputBuffer[18] = res.p[1];    // Expect: 2.000000
111        outputBuffer[19] = res.d[1];    // Expect: -3.000000
112    }
113}