On Sunday, 5 January 2014 at 08:23:45 UTC, TheFlyingFiddle wrote:
On Sunday, 5 January 2014 at 06:31:38 UTC, Jake Thomas wrote:
And got 86,421 lines of assembly!! I expected a load
instruction to load whatever was at loadMe's location into r0
(the return register) and not much else. Maybe 10
Ok, I figured out how to use obj2asm. The trick is to cd to the
directory holding the file you wish to dissassemble and _not_
specify the whole path, or else it throws a confusing Fatal
error: unrecognized flag error.
I ran:
obj2asm intLoadTest.o intLoadTest.d intLoadTest.s
and got this:
Oh, and that was made from:
int main()
{
int loadMe = 10;
return loadMe;
}
On Monday, 6 January 2014 at 20:08:27 UTC, Jake Thomas wrote:
Things like Object.factory also pulls in it's fair share due
to not being able to remove classes. So we get alot of fluff
in small programs.
What do you mean by not being able to remove classes?
Isn't the whole point of
Well since you could potentially create classes through
Object.factory at runtime the code for unused classes will be
compiled into the binary anyways this is even if you never use
Object.factory directly in the code. I am not 100% sure but i
think the main problem is ModuleInfo that keeps
On Sunday, 5 January 2014 at 06:31:38 UTC, Jake Thomas wrote:
And got 86,421 lines of assembly!! I expected a load
instruction to load whatever was at loadMe's location into r0
(the return register) and not much else. Maybe 10 lines - tops
- due to compiler fluffiness. I got about 8,641 times
On Saturday, 4 January 2014 at 03:14:35 UTC, Jake Thomas wrote:
So, short-term, it seems like one would want to use my
native/unative technique. But long-term, hopefully not only
does this get fixed, but the default behavior for the compiler
be to pad things out to the native word size without
According to this
(http://msdn.microsoft.com/en-us/library/windows/hardware/ff561499(v=vs.85).aspx)
32-bit registers are automatically zero extended on x64
architecture while 16-bit and 8-bit registers are not.
Operations that output to a 32-bit subregister are automatically
zero-extended
We have size_t defined as uint on 32bit and ulong on 64bit.
ptrdiff_t for int/long.
I don't know how dmd handles it, although you do have the
ability to align variables.
You may want to consider gdc or ldc more than dmd as they have
better optimization.
Sorry for the delayed response -
Keep in mind that RAM access is slow compared to how fast CPUs
run. It can be beneficial to have slower data types if they
allow more data to fit into the CPU cache.
Abosolutely fantastic point, Marco!
Except if everything still fits in cache as fast types, it'd be
worth having faster types.
On Friday, 3 January 2014 at 05:25:49 UTC, Casper Færgemand wrote:
On Wednesday, 1 January 2014 at 04:17:30 UTC, Jake Thomas wrote:
snip
Are you looking for something like int_fast32_t and the likes
from Boost? If you don't care terribly much for when your
numbers overflow, then as others
On Wednesday, 1 January 2014 at 04:17:30 UTC, Jake Thomas wrote:
snip
Are you looking for something like int_fast32_t and the likes
from Boost? If you don't care terribly much for when your numbers
overflow, then as others suggested, size_t and pttwhatever work
fine.
C compilers like D compilers will pack a struct of two 16-bit
words into a 32-bit type if you don't force an alignment:
http://dlang.org/attribute.html#align
What you should avoid is having a data type start at an
address that is not a multiple of its size, especially when it
comes to SIMD.
I'm a little OCD - who cares about memory to that degree
anymore when we have gigabytes of RAM? This might not even come
into play on the Raspberry Pi.
Memory is very important when it comes to performance, the moving
of memory is the single most energy demanding task the CPU (and
the GPU
First, let me say that I am iextremely/i enthused about D. I
did research on it last year for a project and absolutely fell in
love with it. But praise should go in another thread...
My question comes down to:
Does dmd pack non-array primative variables in memory such that
they are touching,
On Wednesday, 1 January 2014 at 04:17:30 UTC, Jake Thomas wrote:
First, let me say that I am iextremely/i enthused about D.
I did research on it last year for a project and absolutely
fell in love with it. But praise should go in another thread...
My question comes down to:
Does dmd pack
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