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70 lines
2.5 KiB
70 lines
2.5 KiB
library ieee;
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use ieee.std_logic_1164.all;
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use ieee.numeric_std.all;
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use work.pkg.all;
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entity psl_next_event_a is
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port (
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clk : in std_logic
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);
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end entity psl_next_event_a;
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architecture psl of psl_next_event_a is
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signal a, c : std_logic;
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signal b : std_logic_vector(3 downto 0);
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begin
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-- 012345678901234567890
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SEQ_A : sequencer generic map ("_-______________-____") port map (clk, a);
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SEQ_B : hex_sequencer generic map ("443334477444433355555") port map (clk, b);
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SEQ_C : sequencer generic map ("_____-___---_____----") port map (clk, c);
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-- All is sensitive to rising edge of clk
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default clock is rising_edge(clk);
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-- Check for one possible value of b
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-- This assertion holds
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NEXT_EVENT_a : assert always ((a and b = x"4") -> next_event_a(c)[1 to 4](b = x"4"));
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-- Check for all possible values of b
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-- Workaround for missing PSL forall in {i to j} statement
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-- This assertion holds
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check_b : for i in 0 to 0 generate
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signal i_slv : std_logic_vector(b'range);
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begin
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i_slv <= std_logic_vector(to_unsigned(i, 4));
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--Without name it works
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assert always ((a and b = i_slv) -> next_event_a(c)[1 to 4](b = i_slv));
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-- This errors because of similar names for all asserts
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-- ERROR: Assert `count_id(cell->name) == 0' failed in kernel/rtlil.cc:1613.
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-- NEXT_EVENT_a : assert always ((a and b = i_slv) -> next_event_a(c)[1](b = i_slv));
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end generate check_b;
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-- psl.sem_property: cannot handle N_NEXT_EVENT_A
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--
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-- ******************** GHDL Bug occurred ***************************
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-- Please report this bug on https://github.com/ghdl/ghdl/issues
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-- GHDL release: 1.0-dev (tarball) [Dunoon edition]
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-- Compiled with GNAT Version: 8.3.0
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-- Target: x86_64-linux-gnu
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-- /build/src/
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-- Command line:
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-- ghdl --synth --std=08 pkg.vhd sequencer.vhd hex_sequencer.vhd psl_next_event_a.vhd -e psl_next_event_a
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-- Exception TYPES.INTERNAL_ERROR raised
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-- Exception information:
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-- raised TYPES.INTERNAL_ERROR : psl-errors.adb:39
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-- Call stack traceback locations:
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-- 0x556095397b3a 0x5560954bbbb7 0x5560954bb8f1 0x5560954bb69f 0x5560954bb765 0x5560954bc557 0x5560954c2fd7 0x5560954c30de 0x5560954c3235 0x5560954fb17d 0x556095501e72 0x5560954b99c2 0x5560954ba814 0x5560954ba9bc 0x5560955621c6 0x5560955a0ab9 0x5560955a1361 0x5560954b136f 0x5560955aacaf 0x556095363fa3 0x7f72faa58099 0x556095362df8 0xfffffffffffffffe
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-- ******************************************************************
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end architecture psl;
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