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miscco avatar miscco commented on June 2, 2024 2

That depends on your targeted toolchain. Maybe this is a good start:
https://forums.developer.nvidia.com/c/accelerated-computing/hpc-compilers/nvc-nvc-and-nvfortran/313

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Saitama10000 avatar Saitama10000 commented on June 2, 2024 1

@jrhemstad
https://forums.developer.nvidia.com/t/feature-request-fp32-multiplication-with-zero-optimization-specifier/245926/5?u=saitamatenthousand

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miscco avatar miscco commented on June 2, 2024

Hi @Saitama10000 this is not a library feature but a compiler feature.

As library, we have no say in how the compiler interprets our code. So please file this feature request with the compiler toolchains

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Saitama10000 avatar Saitama10000 commented on June 2, 2024

Hi @miscco I'm having a hard time finding where I should file this request. Can you help me out with a link?

Thank you,
Saitama10000

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jrhemstad avatar jrhemstad commented on June 2, 2024

@Saitama10000 what optimization are you hoping to achieve? If the coefficients are known at compile time and your function is inlined, it will exploit the fact that the values are known at compile time.

Example: https://godbolt.org/z/K6Khrb446

Even if the values aren't known at compile time, there is no difference in the type of FMA that is generated.

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