yum-mirror/slang

Making it easier to work with shaders

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

Yong HeSupport high order diff pattern: `bwd_diff(fwd_diff(f))`. (#2695)a911ca6e0

master
branchesmasterall refs →
871 B35 linesraw
1//TEST(compute):COMPARE_COMPUTE_EX:-cpu -compute -output-using-type -shaderobj
2//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
3//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
4
5//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name=outputBuffer
6RWStructuredBuffer<float> outputBuffer;
7
8[BackwardDifferentiable]
9float f(float x)
10{
11    return x * x;
12}
13
14[BackwardDifferentiable]
15float outerF(float x)
16{
17    return f(x * x);
18}
19
20[BackwardDifferentiable]
21float df(float x)
22{
23    return __fwd_diff(outerF)(DifferentialPair<float>(x, 1.0)).d; // 4*x^3
24}
25
26[numthreads(1, 1, 1)]
27void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
28{
29    // Given f(x) = x^4,
30    // f''(x) = 12 * x^2
31    // Expect f''(4) = 192
32    var p = diffPair(4.0, 1.0);
33    __bwd_diff(df)(p, 1.0);
34    outputBuffer[0] = p.d;
35}