core.simd woes

[Manu]

On 5 October 2012 14:46, Iain Buclaw <ibuclaw at ubuntu.com> wrote:

> On 5 October 2012 11:28, Manu <turkeyman at gmail.com> wrote:
> > On 3 October 2012 16:40, Iain Buclaw <ibuclaw at ubuntu.com> wrote:
> >>
> >> On 3 October 2012 02:31, jerro <a at a.com> wrote:
> >> >> import core.simd, std.stdio;
> >> >>
> >> >> void main()
> >> >> {
> >> >>   float4 a = 1, b = 2;
> >> >>   writeln((a + b).array); // WORKS: [3, 3, 3, 3]
> >> >>
> >> >>   float4 c = [1, 2, 3, 4]; // ERROR: "Stored value type does
> >> >>                            // not match pointer operand type!"
> >> >>                            // [..a bunch of LLVM error code..]
> >> >>
> >> >>   float4 c = 0, d = 1;
> >> >>   c.array[0] = 4;
> >> >>   c.ptr[1] = 4;
> >> >>   writeln((c + d).array); // WRONG: [1, 1, 1, 1]
> >> >> }
> >> >
> >> >
> >> > Oh, that doesn't work for me either. I never tried to use those, so I
> >> > didn't
> >> > notice that before. This code gives me internal compiler errors with
> GDC
> >> > and
> >> > DMD too (with "float4 c = [1, 2, 3, 4]" commented out). I'm using DMD
> >> > 2.060
> >> > and a recent versions of GDC and LDC on 64 bit Linux.
> >>
> >> Then don't just talk about it, raise a bug - otherwise how do you
> >> expect it to get fixed!  ( http://www.gdcproject.org/bugzilla )
> >>
> >> I've made a note of the error you get with `__vector(float[4]) c =
> >> [1,2,3,4];' - That is because vector expressions implementation is
> >> very basic at the moment.  Look forward to hear from all your
> >> experiences so we can make vector support rock solid in GDC. ;-)
> >
> >
> > I didn't realise vector literals like that were supported properly in the
> > front end yet?
> > Do they work at all? What does the code generated look like?
>
> They get passed to the backend as of 2.060 - so looks like the
> semantic passes now allow them.
>
> I've just recently added backend support in GDC -
>
> https://github.com/D-Programming-GDC/GDC/commit/7ada3d95b8af1b271d82f1ec5208f0b689eb143c#L1R1194
>
> The codegen looks like so:
>
> float4 a = 2;
> float4 b = [1,2,3,4];
>
> ==>
> vector(4) float a = { 2.0e+0, 2.0e+0, 2.0e+0, 2.0e+0 };
> vector(4) float b = { 1.0e+0, 2.0e+0, 3.0e+0, 4.0e+0 };
>
> ==>
>         movaps  .LC0, %xmm0
>         movaps  %xmm0, -24(%ebp)
>         movaps  .LC1, %xmm0
>         movaps  %xmm0, -40(%ebp)
>
>         .align 16
> .LC0:
>         .long   1073741824
>         .long   1073741824
>         .long   1073741824
>         .long   1073741824
>         .align 16
> .LC1:
>         .long   1065353216
>         .long   1073741824
>         .long   1077936128
>         .long   1082130432
>

Perfect!
I can get on with my unittests :P
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