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Date: Thu, 16 Apr 2020 11:36:38 +0200
From: Szabolcs Nagy <nsz@port70.net>
To: sidneym@codeaurora.org
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Subject: Re: [musl] Hexagon DSP support

* sidneym@codeaurora.org <sidneym@codeaurora.org> [2020-04-15 13:22:29 -0500]:
> > sqrt/sqrtf should work too (you may want to implement them if there is a
> > single instruction) other math failures are not target specific.
> 
> In fact that does go away if I used the hardware accelerated routine that is
> part of compiler-rt.builtins (__hexagon_sqrt)   Creating an explicit
> reference to compiler-rt-builtins vs just copying the assembly, which is
> preferred?

the preferred is like on other targets an inline asm block.
i think using __builtin_sqrt may be fine too if you know that
all hexagon compilers support that and doesnt generate an
actual sqrt call (e.g. on gcc that needs -fno-math-errno).