On 08/17/14 16:16, Johannes Pfau via D.gnu wrote:
> Am Sun, 17 Aug 2014 15:15:12 +0200
> schrieb "Artur Skawina via D.gnu" <d.gnu@puremagic.com>:
>
>> Do you see any problems with it? (Other than gcc not removing
>> that dead constant load)
>
> It's perfect for structs, but when simply declaring a Volatile!uint the
> pointer dereference must be done manually, right?
>
> ----
> enum TimerB = cast(Volatile!(uint)*)0xDEADBEEF;
>
> *TimerB |= 0b1;
> ----
>
> I don't think that a huge problem though, just a little bit
> inconvenient.
Another D-problem - the language doesn't have /real/ refs. But...
import volat;
@inline ref @property timerA() { return *cast(Volatile!uint*)0xDEADBEAF; }
int main() {
timerA |= 0b1;
timerA += 1;
timerA = 42;
int a = timerA - timerA;
int b = ++timerA;
--timerA;
timerA /= 2;
return b;
}
=>
0000000000403620 <_Dmain>:
403620: ba af be ad de mov $0xdeadbeaf,%edx
403625: 83 0a 01 orl $0x1,(%rdx)
403628: 83 02 01 addl $0x1,(%rdx)
40362b: c7 02 2a 00 00 00 movl $0x2a,(%rdx)
403631: 8b 02 mov (%rdx),%eax
403633: 8b 0a mov (%rdx),%ecx
403635: 8b 02 mov (%rdx),%eax
403637: 83 c0 01 add $0x1,%eax
40363a: 89 02 mov %eax,(%rdx)
40363c: 83 2a 01 subl $0x1,(%rdx)
40363f: d1 2a shrl (%rdx)
403641: c3 retq
artur
