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Date: Tue, 21 Mar 2023 16:59:52 +0000
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To: GCC Development <gcc@gcc.gnu.org>
From: Andrew Stubbs <ams@codesourcery.com>
Subject: Libgcc divide vectorization question
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Hi all,

I want to be able to vectorize divide operators (softfp and integer), 
but amdgcn only has hardware instructions suitable for -ffast-math.

We have recently implemented vector versions of all the libm functions, 
but the libgcc functions aren't builtins and therefore don't use those 
hooks.

What's the best way to achieve this? Add a new __builtin_div (and 
__builtin_mod) that tree-vectorize can find, perhaps? Or something else?

Thanks

Andrew