[Mesa-dev] GLSLstd450NMin/NMax/NClamp

[Ian Romanick]

On 11/17/20 9:25 AM, Brian Paul wrote:
> 
> It appears these SPIR-V extension functions don't behave as they should
> on Intel (don't know about other Vulkan drivers).
> 
> They're supposed to be NaN-aware such that if one argument is NaN, the
> other argument is returned.  From our testing, it looks like NMax works
> as expected, but not NMin or NClamp.

Do you have some specific test cases that fail?

> Looking at the SPIR-V/nir/intel code it's hard to tell what's going on
> and whether these semantics are actually being followed.
> 
> Any comments?
> 
> -Brian
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