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even faster way

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This commit is contained in:
Norayr Chilingarian 2014-09-17 19:59:22 +04:00
parent 05b8d63835
commit 9892f9205c
1 changed files with 17 additions and 1 deletions
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18
src/voc/OPM.cmdln.Mod
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@ -587,6 +587,7 @@ MODULE OPM; (* RC 6.3.89 / 28.6.89, J.Templ 10.7.89 / 22.7.96 *)
PROCEDURE GetProperties();
VAR T: Texts.Text; S: Texts.Scanner;
base : LONGINT;
BEGIN
(* default characteristics *)
@ -679,14 +680,29 @@ MODULE OPM; (* RC 6.3.89 / 28.6.89, J.Templ 10.7.89 / 22.7.96 *)
ELSE Console.String ("not using voc.par file"); Console.Ln;
END; (* if useParFile , noch *)
(* commenting this by replacing with faster way; -- noch *
MinSInt := power0(-2, (SIntSize*8-1)); (* -2^(SIntSize*8-1)*)
(*MaxSInt := -(MinSint + 1);; may be optimized?*)
MaxSInt := minus(MinSInt + 1);
MinInt := power0(-2, (IntSize*8-1));
MaxInt := minus(MinInt + 1);
MinLInt := power0(-2, (LIntSize*8-1));
MaxLInt := minus(MinLInt +1);
*)
(* and I'd like to calculate it, not hardcode constants *)
base := -2;
(* we can do
MinLInt := ASH(-2, LIntSize*8-2);
but some compilers may treat -2 as SHORTINT, not LONGINT; -- noch *)
MinSInt := ASH(Base, SIntSize*8-2);
MaxSInt := minus(MinSInt + 1);
MinInt := ASH(Base, IntSize*8-2);
MaxInt := minus(MinInt + 1);
MinLInt := ASH(Base, LIntSize*8-2);
MaxLInt := minus(MinLInt +1);
(*
Console.Int(MinSInt, 0); Console.Ln;