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[/] [lxp32/] [trunk/] [verify/] [common_pkg/] [common_pkg_body.vhd] - Diff between revs 2 and 6
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-- Part of the LXP32 verification environment
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-- Part of the LXP32 verification environment
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--
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--
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-- Copyright (c) 2016 by Alex I. Kuznetsov
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-- Copyright (c) 2016 by Alex I. Kuznetsov
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---------------------------------------------------------------------
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---------------------------------------------------------------------
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use std.textio.all;
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library ieee;
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library ieee;
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use ieee.std_logic_1164.all;
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use ieee.std_logic_1164.all;
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use ieee.numeric_std.all;
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use ieee.numeric_std.all;
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use ieee.math_real.all;
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package body common_pkg is
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package body common_pkg is
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impure function rand return integer is
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procedure rand(variable st: inout rng_state_type; a,b: integer; variable x: out integer) is
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variable r: unsigned(63 downto 0);
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variable r: real;
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begin
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r:=rand_state*to_unsigned(1103515245,32)+12345;
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rand_state:=r(rand_state'range);
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return to_integer(rand_state(30 downto 16));
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end function;
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impure function rand(a: integer; b: integer) return integer is
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begin
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begin
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assert a<=b report "Invalid range" severity failure;
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assert a<=b report "Invalid range" severity failure;
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return (rand mod (b-a+1))+a;
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uniform(st.seed1,st.seed2,r);
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end function;
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r:=r*real(b-a+1);
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x:=a+integer(floor(r));
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end procedure;
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function hex_string(x: std_logic_vector) return string is
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function hex_string(x: std_logic_vector) return string is
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variable xx: std_logic_vector(x'length-1 downto 0);
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variable xx: std_logic_vector(x'length-1 downto 0);
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variable i: integer:=0;
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variable i: integer:=0;
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variable ii: integer;
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variable ii: integer;
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