Re: XCode 2.4 and 32/64-bit universal binaries
Re: XCode 2.4 and 32/64-bit universal binaries
- Subject: Re: XCode 2.4 and 32/64-bit universal binaries
- From: Shawn Erickson <email@hidden>
- Date: Mon, 21 Aug 2006 08:51:36 -0700
On Aug 20, 2006, at 11:03 PM, David Duncan wrote:
On Aug 21, 2006, at 12:36 AM, Herbie Robinson wrote:
In the Intel case, the architecture is much better (16 registers,
not 8) and from what I have heard the architecture more than makes
up for the extra caching. The ABI passes arguments in registers
instead of on the stack, too.
I'll presume your comparing Intel 32-bit vs Intel 64-bit here. As
far as the ABI passing in registers, that's beyond my knowledge, I
know PPC did it, and Intel 32-bit doesn't, but dunno about Intel 64-
bit.
It is up to the vendor on how the want their platform ABI to function
on 64-bit... IIRC most unix based systems pass up to 6 parameters in
registers on x86-64. ...hey look is that an NDA I just ran into?
(to bad Intel/AMD didn't just rename all their registers r0-r16 when
they did this... hate %rdi, %rsi, $rcx, blah)
-Shawn
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