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Date: Tue, 12 Jul 2016 09:35:09 +0100
From: Andrew Turner <andrew@fubar.geek.nz>
To: "Andrey A. Chernov" <ache@FreeBSD.org>
Cc: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: Re: svn commit: r302601 - in head/sys: arm/include arm64/include
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On Tue, 12 Jul 2016 00:37:48 +0000 (UTC)
"Andrey A. Chernov" <ache@FreeBSD.org> wrote:

> Author: ache
> Date: Tue Jul 12 00:37:48 2016
> New Revision: 302601
> URL: https://svnweb.freebsd.org/changeset/base/302601
> 
> Log:
>   I don't know why unsigned int is choosed for wchar_t here, but
> WCHAR_MAX should be <= WINT_MAX. It is bigger, __UINT_MAX > INT32_MAX

Because the ABI either requires us to use an unsigned int [1], or the
preferred type is unsigned int [2]. In the latter case the other choice
is unsigned short, it would seem this is for Windows.

Andrew

[1]
http://infocenter.arm.com/help/topic/com.arm.doc.ihi0055c/IHI0055C_beta_aapcs64.pdf
[2]
http://infocenter.arm.com/help/topic/com.arm.doc.ihi0042f/IHI0042F_aapcs.pdf