On 2010 Sep 04, at 18:48, Chris Parker wrote:

> On x86_64:
> 
> $rdi == arg0 (ObjC: self)
> $rsi == arg1 (ObjC: op, or _cmd)
> $rdx == arg2 (ObjC: first arg of method)
> $rcx == arg3 (ObjC: second arg of method)
> $r8  == arg4
> etc.
> 
> On armv6/7:
> 
> $r0 == arg0 (ObjC: self)
> $r1 == arg1 (ObjC: op, or _cmd)
> $r2 == arg2 (ObjC: first arg of method)
> $r3 == arg3 (ObjC: second arg of method)

Thank you, Chris.  I just filed Bug 8396340, stating that TN2124 should be 
updated to include this information.

So, finally I can trade in my 2006 Mac Mini (Core Duo) for a 64-bit model :)

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