Skip site navigation (1)Skip section navigation (2)
Date:      Mon, 09 Dec 2002 21:32:54 +0100
From:      phk@FreeBSD.ORG
To:        Nate Lawson <nate@root.org>
Cc:        "M. Warner Losh" <imp@bsdimp.com>, arch@FreeBSD.ORG
Subject:   Re: le??toh, etc in userland 
Message-ID:  <75959.1039465974@critter.freebsd.dk>
In-Reply-To: Your message of "Mon, 09 Dec 2002 12:23:38 PST." <Pine.BSF.4.21.0212091220220.25027-100000@root.org> 

next in thread | previous in thread | raw e-mail | index | archive | help
In message <Pine.BSF.4.21.0212091220220.25027-100000@root.org>, Nate Lawson wri
tes:

>> I would really like to also have the "byte-encoding" version in a
>> more general place than in GEOM, but I am not aware of any suitable
>> standards in this area.
>> 
>> The reason of these is that the data encoded/decoded may not live
>> on native alignment boundaries, so the normal "swap-as-needed" 
>> functions are not very efficient.
>
>Already present in CAM (sys/cam/ssi_all.h):
>static __inline void scsi_ulto2b(u_int32_t val, u_int8_t *bytes);
>static __inline void scsi_ulto3b(u_int32_t val, u_int8_t *bytes);
>static __inline void scsi_ulto4b(u_int32_t val, u_int8_t *bytes);
>static __inline u_int32_t scsi_2btoul(u_int8_t *bytes);
>static __inline u_int32_t scsi_3btoul(u_int8_t *bytes);
>static __inline int32_t scsi_3btol(u_int8_t *bytes);
>static __inline u_int32_t scsi_4btoul(u_int8_t *bytes);
>
>I would love to have a 64 bit version and map these to a generic host
>version.  It should use u_int8_t instead of u_char though.

Well, all the more reason to get standardized on this before we grow
a third and fourth private copy.

Does anyone know of any applicable standards anywhere which addresses
this ? 

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-arch" in the body of the message




Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?75959.1039465974>