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Diffstat (limited to 'testsuite/vests/vhdl-ams/ashenden/compliant/guards-and-blocks/processor.vhd')
-rw-r--r-- | testsuite/vests/vhdl-ams/ashenden/compliant/guards-and-blocks/processor.vhd | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/testsuite/vests/vhdl-ams/ashenden/compliant/guards-and-blocks/processor.vhd b/testsuite/vests/vhdl-ams/ashenden/compliant/guards-and-blocks/processor.vhd new file mode 100644 index 0000000..412f9e3 --- /dev/null +++ b/testsuite/vests/vhdl-ams/ashenden/compliant/guards-and-blocks/processor.vhd @@ -0,0 +1,101 @@ + +-- Copyright (C) 2002 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 + +entity processor is +end entity processor; + + + +-- code from book + +architecture rtl of processor is + + subtype word is bit_vector(0 to 31); + type word_vector is array (natural range <>) of word; + + function resolve_unique ( drivers : word_vector ) return word is + begin + return drivers(drivers'left); + end function resolve_unique; + + signal source1, source2 : resolve_unique word register; + -- . . . + + -- not in book + + type alu_op_type is (pass1, pass2, add, subtract); + + procedure perform_alu_op ( signal alu_opcode : in alu_op_type; + signal source1, source2 : in word; + signal destination : out word; + constant ignored : in integer := 0 ) is + begin + null; + end procedure perform_alu_op; + + signal phase1, source1_reg_out_en,other_signal : bit; + signal alu_opcode : alu_op_type; + signal destination : word; + + -- end not in book + +begin + + source1_reg : process (phase1, source1_reg_out_en, -- . . .) is + -- not in book + other_signal) is + -- end not in book + variable stored_value : word; + begin + -- . . . + if source1_reg_out_en = '1' and phase1 = '1' then + source1 <= stored_value; + -- not in book + stored_value := not stored_value; + -- end not in book + else + source1 <= null; + end if; + end process source1_reg; + + alu : perform_alu_op ( alu_opcode, source1, source2, destination, -- . . . ); + -- not in book + open ); + -- end not in book + + -- . . . + + -- not in book + + process is + begin + wait for 10 ns; + source1_reg_out_en <= '1'; + phase1 <= '1', '0' after 10 ns; + wait for 20 ns; + source1_reg_out_en <= '1'; + phase1 <= '1', '0' after 10 ns; + wait; + end process; + + -- end not in book + +end architecture rtl; + +-- end code from book |