linux-kernel - Re: [PATCH v3 1/3] powerpc: rewrite LOAD_REG

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20190819141645.GI31406@gate.crashing.org>
Date:   Mon, 19 Aug 2019 09:16:45 -0500
From:   Segher Boessenkool <segher@...nel.crashing.org>
To:     Christophe Leroy <christophe.leroy@....fr>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v3 1/3] powerpc: rewrite LOAD_REG_IMMEDIATE() as an intelligent macro

Hi Christophe,

On Mon, Aug 19, 2019 at 01:58:10PM +0000, Christophe Leroy wrote:
> +.macro __LOAD_REG_IMMEDIATE r, x
> +	.if (\x) >= 0x80000000 || (\x) < -0x80000000
> +		__LOAD_REG_IMMEDIATE_32 \r, (\x) >> 32
> +		sldi	\r, \r, 32
> +		.if (\x) & 0xffff0000 != 0
> +			oris \r, \r, (\x)@__AS_ATHIGH
> +		.endif
> +		.if (\x) & 0xffff != 0
> +			oris \r, \r, (\x)@l
> +		.endif
> +	.else
> +		__LOAD_REG_IMMEDIATE_32 \r, \x
> +	.endif
> +.endm

How did you test this?  That last "oris" should be "ori"?

Rest looks good :-)


Segher