MATLAB: How to use variable-size or unknown-size arrays in GPU Coder in MATLAB R2018a

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How do I use variable-size or unknown-size arrays in GPU Coder in MATLAB R2018a?

Best Answer

Specify an upper bound for the variable or unknown dimensions, as shown on <https://www.mathworks.com/help/gpucoder/ug/_mw_8583a014-aff1-4dae-8ffb-e72ffbd10869.html MATLAB Language Features Support> for GPU Coder.

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MATLAB: Embeded MATLAB function variable-size signal

You can add calls to ASSERT which effectively bounds the values arguments:

 function y = fcn(u)
 %#codegen
 N = 10000;
 coder.varsize('y', [1 N]);
 assert(u < N);
 y = zeros(1, u);

should do the trick.

The error is effectively complaining about computing the size for the expression:

 zeros(1, u);

Which, provided the information given it must assume is unbounded.

You can reference:

http://www.mathworks.com/help/simulink/ug/variable-size-data-when-dynamic-memory-allocation-is-disabled.html#br9t1u3

for more documentation on this approach.

MATLAB: Custom CUDA kernels and gpuArrays

Have a look at the documentation for CUDAKernel objects

https://www.mathworks.com/help/parallel-computing/run-cuda-or-ptx-code-on-gpu.html#bsic4z0-1

Best Answer

Related Solutions

MATLAB: Embeded MATLAB function variable-size signal

MATLAB: Custom CUDA kernels and gpuArrays

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