[Issue 6459] Inline assembler does not work well for 64 bit registers R8..R15

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=6459

--- Comment #7 from Walter Bright <bugzilla at digitalmars.com> ---
(In reply to Graham from comment #3)
> I also notice if you do:
> 
> and RAX,0x00000000FFFFFFFF
> 
> the compiler accepts it but generates:
> 
> and RAX,0xFFFFFFFFFFFFFFFF
> 
> because, of course, there is no imm64 mode for and/or etc. instructions.
> Same applies for all other immediate constants that can be encoded into 8
> bits.

The compiler generates an error for this now.

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