The sse4 capabilities include a range mode of string matching,
that lets you match characters in a 16 byte string based on a 16
byte set of start and stop character ranges. See the
_SIDD_CMP_RANGES mode in the table.
For example, the pattern in some of our examples for finding the
start of a wo
On 26.03.2012 22:14, Jay Norwood wrote:
The sse4 capabilities include a range mode of string matching,
that lets you match characters in a 16 byte string based on a 16
byte set of start and stop character ranges. See the
_SIDD_CMP_RANGES mode in the table.
For example, the pattern in some of ou
On 03/26/2012 09:10 PM, Dmitry Olshansky wrote:
Speaking more of run-time version of regex, it is essentially running a
VM that executes instructions that do various kinds of match-this,
match-that. The VM dispatch code is quite slow, the optimal _threaded_
code requires either doing it in _asse
Dmitry Olshansky:
> Speaking more of run-time version of regex, it is essentially running a
> VM that executes instructions that do various kinds of match-this,
> match-that. The VM dispatch code is quite slow, the optimal _threaded_
> code requires either doing it in _assembly_ or _computed_ g
Both GCC and LLVM back-ends support computed gotos (despite the asm
produced by LLVM on them is not as good as GCC one). If people feel the
desire to add compiler-specific computed gotos to D, they will risk
adding them with a different syntax on each present and future compiler.
What did y
GotoStatement:
http://dlang.org/statement.html#GotoStatement
Martin Nowak:
> What did you had in mind?
>
> The following would only require a minor syntax change.
>
> auto codeaddr = &Label;
> goto codeaddr + 0x10;
Something like this:
Label1:
//...
Label2:
//...
Label3:
//...
enum void*[3] targs = [&Label1, &Label2, &Label3];
int i = 2; // run-time
On 27.03.2012 1:07, Timon Gehr wrote:
On 03/26/2012 09:10 PM, Dmitry Olshansky wrote:
Speaking more of run-time version of regex, it is essentially running a
VM that executes instructions that do various kinds of match-this,
match-that. The VM dispatch code is quite slow, the optimal _threaded_
On 3/27/12 13:37 , bearophile wrote:
Something like this:
Label1:
//...
Label2:
//...
Label3:
//...
enum void*[3] targs = [&Label1,&Label2,&Label3];
int i = 2; // run-time value
goto targs[i];
+1, this would be sweet
enum void*[3] targs = [&Label1, &Label2, &Label3];
int i = 2; // run-time value
goto targs[i];
Yeah, that would work with the extension.
Martin Nowak:
The following would only require a minor syntax change.
auto codeaddr = &Label;
goto codeaddr + 0x10;
GotoStatement:
goto Identifier ;
goto Expression ; // NEW
goto default ;
goto case ;
goto case Expression ;
You also need to support &Label, that currently
On 03/27/2012 01:37 PM, bearophile wrote:
See:
http://gcc.gnu.org/onlinedocs/gcc-3.2/gcc/Labels-as-Values.html
(I'd like to know why GCC uses&&Label instead of&Label).
Because labels reside in their own namespace.
Timon Gehr:
On 03/27/2012 01:37 PM, bearophile wrote:
See:
http://gcc.gnu.org/onlinedocs/gcc-3.2/gcc/Labels-as-Values.html
(I'd like to know why GCC uses&&Label instead of&Label).
Because labels reside in their own namespace.
I see. That's probably true in D too.
But if possible I think th
On Tue, 27 Mar 2012 17:01:51 +0200, bearophile <
You also need to support &Label, that currently is "Error:
undefined identifier Label".
Bye,
bearophile
That doesn't require a syntax addition.
One would only need to lookup the label and
detect naming collisions with other declarations.
On Tuesday, 27 March 2012 at 09:51:07 UTC, bearophile wrote:
Dmitry Olshansky:
Speaking more of run-time version of regex, it is essentially
running a VM that executes instructions that do various kinds
of match-this, match-that. The VM dispatch code is quite slow,
the optimal _threaded_ code
Tove:
I'm very surprised by your findings by computed gotos... the
compiler I am most used to(rvct for arm)... seems proficient in
emitting jump table instructions(TBB, TBH) for thumb2... but
based on your findings I will definitely re-check the generated
asm.
You have also to take in accou
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