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Re: Question about strange register calling truncates to SImode on x86_64
- From: Kai Tietz <Kai dot Tietz at onevision dot com>
- To: Michael Matz <matz at suse dot de>
- Cc: Andrew Haley <aph at redhat dot com>, gcc at gcc dot gnu dot org
- Date: Thu, 12 Oct 2006 09:20:48 +0200
- Subject: Re: Question about strange register calling truncates to SImode on x86_64
Hello Michael,
thanks for description. I wasn't aware, that the upper 32 bits are zeroed.
Does this means that even the stack has to be in the first 4 Gb, too. Or
does this mov instruction does a sign-extention.
Best regards,
i.A. Kai Tietz