Import vests testsuite

1 files changed, 155 insertions, 0 deletions

diff --git a/testsuite/vests/vhdl-93/ashenden/compliant/ch_19_random-b.vhd b/testsuite/vests/vhdl-93/ashenden/compliant/ch_19_random-b.vhd
new file mode 100644
index 0000000..0c15b6c
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+++ b/testsuite/vests/vhdl-93/ashenden/compliant/ch_19_random-b.vhd
@@ -0,0 +1,155 @@
+
+-- Copyright (C) 1996 Morgan Kaufmann Publishers, Inc
+
+-- This file is part of VESTs (Vhdl tESTs).
+
+-- VESTs is free software; you can redistribute it and/or modify it
+-- under the terms of the GNU General Public License as published by the
+-- Free Software Foundation; either version 2 of the License, or (at
+-- your option) any later version. 
+
+-- VESTs is distributed in the hope that it will be useful, but WITHOUT
+-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+-- FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+-- for more details. 
+
+-- You should have received a copy of the GNU General Public License
+-- along with VESTs; if not, write to the Free Software Foundation,
+-- Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+
+-- ---------------------------------------------------------------------
+--
+-- $Id: ch_19_random-b.vhd,v 1.3 2001-10-26 16:29:36 paw Exp $
+-- $Revision: 1.3 $
+--
+-- ---------------------------------------------------------------------
+
+library math;
+
+package body random is
+
+  use math.math_real;
+
+  constant sample_seeds : seed_array(0 to 50)
+    := (  0 => (1, 1),
+          1 => (1919456777, 2006618587),
+          2 => (928906921, 476680813),
+          3 => (715788085, 762347824),
+          4 => (366002668, 1804336679),
+          5 => (1866585254, 247488051),
+          6 => (1342990589, 1539624735),
+          7 => (677313287, 1675609237),
+          8 => (644816519, 2026475269),
+          9 => (1654953611, 564421524),
+          10 => (1020104619, 712556314),
+          11 => (609798541, 1592526288),
+          12 => (1106087470, 1468242308),
+          13 => (1378844312, 646793513),
+          14 => (966261604, 481733031),
+          15 => (1407842093, 1316990206),
+          16 => (1705378215, 1930221363),
+          17 => (206887499, 1810320799),
+          18 => (1681633030, 2114795480),
+          19 => (71194926, 1642522201),
+          20 => (663275331, 1947299255),
+          21 => (224432387, 944962866),
+          22 => (1156075861, 1866435087),
+          23 => (1670357576, 1247152991),
+          24 => (846934138, 1673364736),
+          25 => (1972636955, 1404522710),
+          26 => (533484185, 592078395),
+          27 => (1989468008, 1409246301),
+          28 => (697086615, 1975145057),
+          29 => (111393259, 1673620688),
+          30 => (1352201163, 872947497),
+          31 => (1342844190, 877696585),
+          32 => (938770066, 1222894811),
+          33 => (1144599578, 661919919),
+          34 => (1750521407, 269946538),
+          35 => (457892500, 1256953520),
+          36 => (1678589945, 356027520),
+          37 => (1484458924, 2103068828),
+          38 => (1296978761, 2124096638),
+          39 => (1702642440, 1161000593),
+          40 => (1244690090, 2016422304),
+          41 => (1858682943, 1053836731),
+          42 => (1496964676, 701079294),
+          43 => (432696952, 602526767),
+          44 => (2097684438, 1264032473),
+          45 => (2115456834, 298917738),
+          46 => (432301768, 232430346),
+          47 => (1929812456, 758157910),
+          48 => (1655564027, 1062345086),
+          49 => (1116121051, 538424126),
+          50 => (844396720, 821616997) );
+
+
+  procedure init_fixed ( random_info : out random_info_record;
+                         mean : in real ) is
+  begin
+    random_info.distribution := fixed;
+    random_info.mean := mean;
+  end procedure init_fixed;
+
+
+  procedure init_uniform ( random_info : out random_info_record;
+                           lower_bound, upper_bound : in real;
+                           seed : in seed_type ) is
+  begin
+    assert lower_bound <= upper_bound
+                          report "init_uniform: lower_bound > upper_bound" severity failure;
+    random_info.distribution := uniform;
+    random_info.lower_bound := lower_bound;
+    random_info.upper_bound := upper_bound;
+    random_info.seed := seed;
+  end procedure init_uniform;
+
+
+  procedure init_exponential ( random_info : out random_info_record;
+                               mean : in real;
+                               seed : in seed_type ) is
+  begin
+    assert mean > 0.0
+      report "init_exponential: mean not positive" severity failure;
+    random_info.distribution := exponential;
+    random_info.mean := mean;
+    random_info.seed := seed;
+  end procedure init_exponential;
+
+
+  procedure generate_uniform ( random_info : inout random_info_record;
+                               random_number : out real ) is
+    variable tmp : real;
+  begin
+    math_real.uniform(random_info.seed.seed1, random_info.seed.seed2, tmp);
+    random_number := random_info.lower_bound
+                     + tmp * (random_info.upper_bound - random_info.lower_bound);
+  end procedure generate_uniform;
+
+
+  procedure generate_exponential ( random_info : inout random_info_record;
+                                   random_number : out real ) is
+    variable tmp : real;
+  begin
+    loop
+      math_real.uniform(random_info.seed.seed1, random_info.seed.seed2, tmp);
+      exit when tmp /= 0.0;
+    end loop;
+    random_number := - random_info.mean * math_real.log(tmp);
+  end procedure generate_exponential;
+
+
+  procedure generate_random ( random_info : inout random_info_record;
+                              random_number : out real ) is
+  begin
+    case random_info.distribution is
+      when fixed =>
+        random_number := random_info.mean;
+      when uniform =>
+        generate_uniform(random_info, random_number);
+      when exponential =>
+        generate_exponential(random_info, random_number);
+    end case;
+  end procedure generate_random;
+
+end package body random;