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Message-ID: <20200416093637.GB23945@port70.net>
Date: Thu, 16 Apr 2020 11:36:38 +0200
From: Szabolcs Nagy <nsz@...t70.net>
To: sidneym@...eaurora.org
Cc: musl@...ts.openwall.com
Subject: Re: Hexagon DSP support
* sidneym@...eaurora.org <sidneym@...eaurora.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).
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