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Re: Inline assembly queries [2]

From: Andreas Schwab <schwab at linux-m68k dot org>
To: kernel mailz <kernelmailz at googlemail dot com>
Cc: Brad Boyer <flar at allandria dot com>, linuxppc-dev at ozlabs dot org, gcc-help at gcc dot gnu dot org, linux-kernel at vger dot kernel dot org
Date: Fri, 03 Jul 2009 23:19:57 +0200
Subject: Re: Inline assembly queries [2]
References: <abe8a1fd0907022344k2eb9874ejdbda3209a7cadf40@mail.gmail.com> <20090703174031.GA12410@cynthia.pants.nu> <abe8a1fd0907031305r5cb9e2e8pec170bffb1c497ff@mail.gmail.com>

kernel mailz <kernelmailz@googlemail.com> writes:

> My query was more on %U1%X1, I guess it is specifying U and/or X for %1 right ?
> what does U/X stand for (is it similar to u - unsigned and x for a hex address)
> are there any more literals like U/X/...

The 'U' and 'X' modifiers expand to 'u' and 'x' resp, depending on the
form of the referenced memory operand.  That allows one to select the
right mnemonic among for example lwz, lwzu, lwzx and lwzux.  Those
modifiers must always be used together with the "m" constraint.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

References:
- Inline assembly queries [2]
  - From: kernel mailz
- Re: Inline assembly queries [2]
  - From: Brad Boyer
- Re: Inline assembly queries [2]
  - From: kernel mailz

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