Shachar Shemesh wrote:
Now, if 64bit is anything like it, you actually can't mix them in the
same process. Too much work to switch between them. Different memory
addressing modes, etc.
I think that's the reason - different and incompatible modes.
I distinctly remember this in the context of why AMD's 64-bit
implementation is considered superior to Intel's - the 32-bit
support is transparent - sort of a "subset" of the 64-bit opcode
set.
Maybe you'll have some luck learning about this from looking
at compiler support for Intel's 64-bit.
--Amos
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