Through Reddit I've found an article about
vector-calling-convention added to VS2013:
http://blogs.msdn.com/b/vcblog/archive/2013/07/12/introducing-vector-calling-convention.aspx
So I have written what I think is a similar D program:
import core.stdc.stdio, core.simd;
struct Particle { float
On Saturday, 13 July 2013 at 10:36:01 UTC, bearophile wrote:
Through Reddit I've found an article about
vector-calling-convention added to VS2013:
http://blogs.msdn.com/b/vcblog/archive/2013/07/12/introducing-vector-calling-convention.aspx
-- snip --
Are those vector calling conventions us
Am 13.07.2013 12:35, schrieb bearophile:
The resulting X86 asm:
__D4test12addParticlesFNaNbxS4test8ParticlexS4test8ParticleZS4test8Particle:
pushl%ebp
movl%esp, %ebp
andl$-16, %esp
subl$16, %esp
movaps40(%ebp), %xmm0
movaps56(%ebp), %xmm1
Benjamin Thaut:
http://d.puremagic.com/issues/show_bug.cgi?id=10226
I see there are codegen inefficiencies.
Until dmd uses the XMM registers correctly it doesn't make much
sense to add a special calling convetion for this purpose.
I don't agree, because:
- Even if DMD codegen is far from
Calling convention optimizations can probably be done during
whole program optimization, which 1) usable for
computation-intensive applications anyway, 2) guarantees
invisibility of those fastcall functions to external code so
there's no incompatibility.
Kagamin:
Calling convention optimizations can probably be done during
whole program optimization, which 1) usable for
computation-intensive applications anyway, 2) guarantees
invisibility of those fastcall functions to external code so
there's no incompatibility.
In D you can tag a free fun
Am 14.07.2013 14:11, schrieb bearophile:
Benjamin Thaut:
http://d.puremagic.com/issues/show_bug.cgi?id=10226
I see there are codegen inefficiencies.
Until dmd uses the XMM registers correctly it doesn't make much sense
to add a special calling convetion for this purpose.
I don't agree, b
Benjamin Thaut:
I just wanted to say that there are currently bigger fish to
fry then micro optimization through calling convetions. (GC,
allocators, all the bugs...)
I understand and I agree. On the other hand I think there are
things that (if desired) it's better to introduce sooner, despi
Benjamin Thaut:
If it is optimized I'M going to be disappointed by LDCs
codegen.<
Why?
Bye,
bearophile
