[SPIR-V] Invalid SPIR-V operand with isnan() about directxshadercompiler HOT 4 CLOSED

If you're interested in a quick fix, you can use inline SPIR-V to use OpIsNan directly

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Thanks for the issue! Sent a PR 😊 Most of the team being OOO, there might be some delays, but it's on its way.

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Indeed, by defining a new function as follows, we can pass the validation.

[[vk::ext_instruction(156)]]
bool alt_isnan(float v1);

from directxshadercompiler.

RWStructuredBuffer Out;
[numthreads(1, 1, 1)]
void main(uint id : SV_DispatchThreadID)
{
float value = Out[id];
bool bar = isnan(value); // Check if 'value' is NaN
Out[id] = bar ? 1.0f : 0.0f; // Store 1.0f if 'value' is NaN, otherwise 0.0f
}

from directxshadercompiler.