Re: GCC 4.1 now the default GCC version for etch
Lennart Sorensen <email@example.com> writes:
> On Tue, Jun 20, 2006 at 12:32:18PM +0200, Goswin von Brederlow wrote:
>> Exactly. Isn't the x86_64 instruction set basicaly the same as ia32
>> just with a few extra opcodes and more registers? Any general fault in
>> the instruction set should still remain.
> x86 processors have multiple modes with different instructions and
> registers in each mode. AMD decided to make long mode remove some old
> features and in some cases replace them with new features.
But the changes in the instruction set are minimal. With a bit of care
you can use the same inline asm code for ia32 and x86_64 for example.
They didn't fix any fundamental flaws in the 386 instruction set. Just
droped some later addons like mmx.
That is what I ment.