From: xingxing pan <forandom@gmail.com>
To: gdb@sourceware.org
Subject: Re: In the NONSTOP implementation why dose gdb use register r0 and r1 as temp registers for rn and rd ?
Date: Mon, 03 May 2010 14:16:00 -0000 [thread overview]
Message-ID: <m2s77f815bd1005030716k17d1d79dt678eef0f58e02b3d@mail.gmail.com> (raw)
In-Reply-To: <n2s77f815bd1005022227tc4c6422cj35ca8fd96df840f1@mail.gmail.com>
Can anyone help?
2010/5/3 xingxing pan <forandom@gmail.com>:
> hey guys, I'm porting NONSTOP to an ARM similar architechure. I found
> the following comments in the source.
>
> Instruction is of form:
> <op><cond> rd, [rn,] #imm
> Rewrite as:
> Preparation:
> tmp1, tmp2 <- r0,r1
> r0,r1 <- rd,rn
> Insn: <op><cond> r0,r1 #imm
> Cleanup: rd <- r0; r0<-tmp1;r1<-tmp2
>
> why dose gdb use register r0 and r1? why not use rd and rn directly?
> Thank you!
>
next prev parent reply other threads:[~2010-05-03 14:16 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-03 5:28 xingxing pan
2010-05-03 14:16 ` xingxing pan [this message]
2010-05-03 15:58 ` Daniel Jacobowitz
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