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Date: Thu, 1 Jul 2021 22:40:16 +0000
From: Joseph Myers <joseph@codesourcery.com>
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To: "H.J. Lu" <hjl.tools@gmail.com>
CC: IA32 System V Application Binary Interface <ia32-abi@googlegroups.com>,
 <llvm-dev@lists.llvm.org>, GNU C Library <libc-alpha@sourceware.org>, GCC
 Patches <gcc-patches@gcc.gnu.org>
Subject: Re: [PATCH] Add optional _Float16 support
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On Thu, 1 Jul 2021, H.J. Lu wrote:

> BTW, _Float16 software emulation may require more than just SSE
> since we need to do _Float16 load and store with XMM registers.
> There is no 16bit load/store for XMM registers without AVX512FP16.

You should be able to make the move go via general-purpose registers (for 
example) if you can't do a direct 16-bit load/store for XMM registers.

-- 
Joseph S. Myers
joseph@codesourcery.com