jerro wrote:
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.
Yes the SIMD situation isn't entirely usable right now with DMD
and LDC. Only simple vector arithmetic is possible to my
knowledge. The internal DMD error is actually from processing '(a
+ b)' and returning it to writeln() without assigning to an
separate float4 first.. for example, this compiles with DMD and
outputs correctly:
import core.simd, std.stdio;
void main()
{
float4 a = 1, b = 2;
float4 r = a + b;
writeln(r.array);
float4 c = [1, 2, 3, 4];
float4 d = 1;
c.array[0] = 4;
c.ptr[1] = 4;
r = c + d;
writeln(r.array);
}
correctly outputs:
[3, 3, 3, 3]
[5, 5, 4, 5]
I've never tried to do SIMD with GDC, though I understand it's
done differently and core.simd XMM operations aren't supported
(though I can't get them to work in DMD either... *sigh*). Take a
look at Manu's std.simd library for reference on GDC SIMD
support:
https://github.com/TurkeyMan/phobos/blob/master/std/simd.d
