• Temtaime (15/15) Aug 10 2013 Hello, guys!
• Temtaime (1/1) Aug 10 2013 Sorry, not class, but struct.
• Manfred Nowak (4/5) Aug 10 2013 Maybey nothing than thinking---that the adress is printed in the number ...
• novice2 (15/15) Aug 10 2013 i guess, because of allocated on stack:
• bearophile (6/6) Aug 10 2013 Related?
• Kapps (3/18) Aug 13 2013 Perhaps core.simd (http://dlang.org/phobos/core_simd.html) could

"Temtaime" <temtaime gmail.com> writes:

Hello, guys!

I have Matrix class(that contains an array of 16 floats) and SSE 
code to mult it.
It's neccessary to have an array alignment 16.

I'm figured out simple test-code:

align(16) struct S {
	align(16) int a;
}


void main() {
	align(16) S s;
	writeln(cast(void *)&s.a);
}

And it prints 18FCC8, but must ends with "0". What i'm doing 
wrong?

Thanks.

"Temtaime" <temtaime gmail.com> writes:

Sorry, not class, but struct.

Manfred Nowak <svv1999 hotmail.com> writes:

Temtaime wrote:
 What i'm doing wrong?

Maybey nothing than thinking---that the adress is printed in the number of 
bits, whereas it is printed in the number of bytes.

-manfred 

"novice2" <sorry noem.ail> writes:

i guess, because of allocated on stack:

import std.stdio;

align(16) struct S
{
   align(16) int a;
}

S sGlobal;

void main()
{
   S sLocal;
   writefln("0x%08X 0x%08X", cast(uint) &sGlobal, cast(uint) 
&sLocal);
}

0x00162110 0x0012FE14

but, IMHO, this is not good

"bearophile" <bearophileHUGS lycos.com> writes:

Related?
http://d.puremagic.com/issues/show_bug.cgi?id=2278

Perhaps related:
http://forum.dlang.org/thread/mailman.990.1370788529.13711.digitalmars-d-ldc puremagic.com?page=3#post-pecxybsbjdsnuljtyqjm:40forum.dlang.org

Bye,
bearophile

"Kapps" <opantm2+spam gmail.com> writes:

On Saturday, 10 August 2013 at 20:36:24 UTC, Temtaime wrote:
 Hello, guys!

 I have Matrix class(that contains an array of 16 floats) and 
 SSE code to mult it.
 It's neccessary to have an array alignment 16.

 I'm figured out simple test-code:

 align(16) struct S {
 	align(16) int a;
 }


 void main() {
 	align(16) S s;
 	writeln(cast(void *)&s.a);
 }

 And it prints 18FCC8, but must ends with "0". What i'm doing 
 wrong?

 Thanks.

Perhaps core.simd (http://dlang.org/phobos/core_simd.html) could 
be of help. I believe that those types should be aligned.