> Norman Ramsey writes:
>
> > On x86, GHC can translate 8-bit and 16-bit operations directly
> > into the 8-bit and 16-bit machine instructions that the hardware
> > supports. But there are other platforms on which the smallest
> > unit of arithmetic may be 32 or even 64 bits. Is there a
yeah, like, currently the XOR for setting registers to zero trick / code
optimization (first implemented in ghc backend by reid barton) is done as
part of the pretty printer on X86/AMD_64 targets
this and a lot of other easy win peephole optimizations that are platform
/target dependent happen in
Norman Ramsey writes:
> On x86, GHC can translate 8-bit and 16-bit operations directly
> into the 8-bit and 16-bit machine instructions that the hardware
> supports. But there are other platforms on which the smallest
> unit of arithmetic may be 32 or even 64 bits. Is there a central
> module
I think carter has it still right that it happens in the backends.
If a new backend doesn't support these we could move this up into Cmm
though without much issue I think.
Am 28/10/2021 um 23:12 schrieb Carter Schonwald:
I think thats done on a per backend basis (though theres been a lot of
I think thats done on a per backend basis (though theres been a lot of
changes since i last looked at some of the relevent pieces). (i'm actually
based in Cambridge MA for the next 1-2 years if you wanna brain storm IRL
sometime)
On Thu, Oct 28, 2021 at 4:59 PM Norman Ramsey wrote:
> On x86,
On x86, GHC can translate 8-bit and 16-bit operations directly
into the 8-bit and 16-bit machine instructions that the hardware
supports. But there are other platforms on which the smallest
unit of arithmetic may be 32 or even 64 bits. Is there a central
module in GHC that can take care of
