* 128-bit data model macros
@ 2020-01-25 3:41 Jeffrey Walton
2020-01-25 12:48 ` Segher Boessenkool
0 siblings, 1 reply; 3+ messages in thread
From: Jeffrey Walton @ 2020-01-25 3:41 UTC (permalink / raw)
To: gcc-help
Hi Everyone,
On 64-bit platforms _LP64 and __LP64__ are defined.
Do 128-bit machines use the macros _LP128 and __LP128__?
Jeff
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: 128-bit data model macros
2020-01-25 3:41 128-bit data model macros Jeffrey Walton
@ 2020-01-25 12:48 ` Segher Boessenkool
2020-01-26 3:07 ` Jeffrey Walton
0 siblings, 1 reply; 3+ messages in thread
From: Segher Boessenkool @ 2020-01-25 12:48 UTC (permalink / raw)
To: Jeffrey Walton; +Cc: gcc-help
Hi!
On Fri, Jan 24, 2020 at 10:40:47PM -0500, Jeffrey Walton wrote:
> On 64-bit platforms _LP64 and __LP64__ are defined.
That's not quite true. Those macros mean that "long int" as well as
pointers are 64 bits, for the selected ABI.
> Do 128-bit machines use the macros _LP128 and __LP128__?
There is __SIZEOF_INT128__, that may be what you are looking for.
Segher
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: 128-bit data model macros
2020-01-25 12:48 ` Segher Boessenkool
@ 2020-01-26 3:07 ` Jeffrey Walton
0 siblings, 0 replies; 3+ messages in thread
From: Jeffrey Walton @ 2020-01-26 3:07 UTC (permalink / raw)
To: gcc-help
On Sat, Jan 25, 2020 at 7:48 AM Segher Boessenkool
<segher@kernel.crashing.org> wrote:
>
> Hi!
>
> On Fri, Jan 24, 2020 at 10:40:47PM -0500, Jeffrey Walton wrote:
> > On 64-bit platforms _LP64 and __LP64__ are defined.
>
> That's not quite true. Those macros mean that "long int" as well as
> pointers are 64 bits, for the selected ABI.
>
> > Do 128-bit machines use the macros _LP128 and __LP128__?
>
> There is __SIZEOF_INT128__, that may be what you are looking for.
Thanks Segher.
Yes, I'm aware of __SIZEOF_INT128__. It is very helpful when available.
I was more interested in ILP128 data model, and its possible use in
the higher end computers. (Does that model even exist?)
Jeff
^ permalink raw reply [flat|nested] 3+ messages in thread
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2020-01-25 3:41 128-bit data model macros Jeffrey Walton
2020-01-25 12:48 ` Segher Boessenkool
2020-01-26 3:07 ` Jeffrey Walton
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