On Wed, Mar 25, 2015 at 05:05:50PM -0700, Linus Torvalds wrote:
> so 'as' is clearly just stupid. It already takes the size of the
> constant into account and generates different instructions. Why not
> for the common 32-bit case too?
I think the destination register mandates which insn to use:
mov $0x12345678, %rdi
mov $0x12345678, %edi
...
15: 48 c7 c7 78 56 34 12 mov $0x12345678,%rdi
1c: bf 78 56 34 12 mov $0x12345678,%edi
and 'as' is perhaps not insolent enough to go and change it when seeing
the 32-bit constant.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
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