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From: Andreas Schwab <schwab@linux-m68k.org>
To: Tom Tromey <tromey@redhat.com>
Cc: 4470@emacsbugs.donarmstrong.com
Subject: bug#4470: Acknowledgement (23.1; threaded interpreter)
Date: Fri, 18 Sep 2009 20:25:46 +0200	[thread overview]
Message-ID: <m27hvwm7o5.fsf@igel.home> (raw)
In-Reply-To: <m3r5u4duj2.fsf@fleche.redhat.com> (Tom Tromey's message of "Fri,  18 Sep 2009 11:36:49 -0600")

Tom Tromey <tromey@redhat.com> writes:

> +      static int initialized;
> +
> +      if (!initialized)
> +	{
> +	  int i;
> +	  initialized = 1;
> +	  /* We must initialize every slot in the table.  An empty
> +	     slot before Bconstant should just abort.  All the opcodes
> +	     after Bconstant should use the same code as Bconstant.  */
> +	  for (i = 0; i < 256; ++i)
> +	    {
> +	      if (!targets[i])
> +		targets[i] = i < Bconstant ? &&insn_default : &&insn_Bconstant;
> +	    }
> +	}
> +#endif

You can use [0 ... 255] = &&insn_default, [Bconstant ... 255] =
&&insn_Bconstant to statically initialize the array, avoiding the
runtime initialisation.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."





  reply	other threads:[~2009-09-18 18:25 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-09-17 20:56 bug#4470: 23.1; threaded interpreter Tom Tromey
     [not found] ` <handler.4470.B.125322103530189.ack@emacsbugs.donarmstrong.com>
2009-09-18 17:36   ` bug#4470: Acknowledgement (23.1; threaded interpreter) Tom Tromey
2009-09-18 18:25     ` Andreas Schwab [this message]
2009-09-18 19:00       ` Tom Tromey
2012-08-09 20:07         ` bug#4470: 23.1; threaded interpreter Glenn Morris

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