jens
bdb8fec295
git-svn-id: http://moon:8086/svn/vhdl/trunk@1424 cc03376c-175c-47c8-b038-4cd826a8556b
258 lines
11 KiB
VHDL
258 lines
11 KiB
VHDL
--------------------------------------------------------------------------
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--
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-- Copyright (C) 1993, Peter J. Ashenden
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-- Mail: Dept. Computer Science
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-- University of Adelaide, SA 5005, Australia
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-- e-mail: petera@cs.adelaide.edu.au
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; either version 1, or (at your option)
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-- any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program; if not, write to the Free Software
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-- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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--
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--------------------------------------------------------------------------
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--
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-- $RCSfile: dlx_instr.vhdl,v $ $Revision: 2.1 $ $Date: 1993/10/31 22:34:41 $
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--
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--------------------------------------------------------------------------
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--
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-- Package specification for DLX instructions
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--
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use std.textio.line,
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work.dlx_types.all;
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package dlx_instr is
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-- A dlx instruction is 32 bits wide. There are three instruction formats:
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--
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-- I-type:
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-- 0 5 6 10 11 15 16 31
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-- +----------------------------------------------------------------+
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-- | opcode | rs1 | rd | immed16 |
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-- +----------------------------------------------------------------+
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--
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-- R-type:
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-- 0 5 6 10 11 15 16 20 21 25 26 31
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-- +----------------------------------------------------------------+
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-- | opcode | rs1 | rs2 | rd | | func |
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-- +----------------------------------------------------------------+
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--
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-- J-type:
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-- 0 5 6 31
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-- +----------------------------------------------------------------+
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-- | opcode | immed26 |
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-- +----------------------------------------------------------------+
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--
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subtype dlx_opcode is bit_vector(0 to 5);
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subtype dlx_sp_func is bit_vector(0 to 5);
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subtype dlx_fp_func is bit_vector(0 to 4);
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subtype dlx_reg_addr is bit_vector(0 to 4);
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subtype dlx_immed16 is bit_vector(0 to 15);
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subtype dlx_immed26 is bit_vector(0 to 25);
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constant op_special : dlx_opcode := B"000000";
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constant op_fparith : dlx_opcode := B"000001";
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constant op_j : dlx_opcode := B"000010";
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constant op_jal : dlx_opcode := B"000011";
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constant op_beqz : dlx_opcode := B"000100";
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constant op_bnez : dlx_opcode := B"000101";
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constant op_bfpt : dlx_opcode := B"000110";
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constant op_bfpf : dlx_opcode := B"000111";
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constant op_addi : dlx_opcode := B"001000";
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constant op_addui : dlx_opcode := B"001001";
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constant op_subi : dlx_opcode := B"001010";
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constant op_subui : dlx_opcode := B"001011";
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constant op_andi : dlx_opcode := B"001100";
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constant op_ori : dlx_opcode := B"001101";
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constant op_xori : dlx_opcode := B"001110";
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constant op_lhi : dlx_opcode := B"001111";
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constant op_rfe : dlx_opcode := B"010000";
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constant op_trap : dlx_opcode := B"010001";
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constant op_jr : dlx_opcode := B"010010";
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constant op_jalr : dlx_opcode := B"010011";
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constant op_slli : dlx_opcode := B"010100";
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constant op_undef_15 : dlx_opcode := B"010101";
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constant op_srli : dlx_opcode := B"010110";
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constant op_srai : dlx_opcode := B"010111";
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constant op_seqi : dlx_opcode := B"011000";
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constant op_snei : dlx_opcode := B"011001";
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constant op_slti : dlx_opcode := B"011010";
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constant op_sgti : dlx_opcode := B"011011";
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constant op_slei : dlx_opcode := B"011100";
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constant op_sgei : dlx_opcode := B"011101";
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constant op_undef_1E : dlx_opcode := B"011110";
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constant op_undef_1F : dlx_opcode := B"011111";
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constant op_lb : dlx_opcode := B"100000";
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constant op_lh : dlx_opcode := B"100001";
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constant op_undef_22 : dlx_opcode := B"100010";
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constant op_lw : dlx_opcode := B"100011";
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constant op_lbu : dlx_opcode := B"100100";
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constant op_lhu : dlx_opcode := B"100101";
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constant op_lf : dlx_opcode := B"100110";
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constant op_ld : dlx_opcode := B"100111";
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constant op_sb : dlx_opcode := B"101000";
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constant op_sh : dlx_opcode := B"101001";
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constant op_undef_2A : dlx_opcode := B"101010";
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constant op_sw : dlx_opcode := B"101011";
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constant op_undef_2C : dlx_opcode := B"101100";
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constant op_undef_2D : dlx_opcode := B"101101";
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constant op_sf : dlx_opcode := B"101110";
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constant op_sd : dlx_opcode := B"101111";
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constant op_sequi : dlx_opcode := B"110000";
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constant op_sneui : dlx_opcode := B"110001";
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constant op_sltui : dlx_opcode := B"110010";
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constant op_sgtui : dlx_opcode := B"110011";
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constant op_sleui : dlx_opcode := B"110100";
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constant op_sgeui : dlx_opcode := B"110101";
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constant op_undef_36 : dlx_opcode := B"110110";
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constant op_undef_37 : dlx_opcode := B"110111";
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constant op_undef_38 : dlx_opcode := B"111000";
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constant op_undef_39 : dlx_opcode := B"111001";
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constant op_undef_3A : dlx_opcode := B"111010";
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constant op_undef_3B : dlx_opcode := B"111011";
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constant op_undef_3C : dlx_opcode := B"111100";
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constant op_undef_3D : dlx_opcode := B"111101";
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constant op_undef_3E : dlx_opcode := B"111110";
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constant op_undef_3F : dlx_opcode := B"111111";
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constant sp_func_nop : dlx_sp_func := B"000000";
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constant sp_func_undef_01 : dlx_sp_func := B"000001";
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constant sp_func_undef_02 : dlx_sp_func := B"000010";
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constant sp_func_undef_03 : dlx_sp_func := B"000011";
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constant sp_func_sll : dlx_sp_func := B"000100";
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constant sp_func_undef_05 : dlx_sp_func := B"000101";
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constant sp_func_srl : dlx_sp_func := B"000110";
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constant sp_func_sra : dlx_sp_func := B"000111";
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constant sp_func_undef_08 : dlx_sp_func := B"001000";
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constant sp_func_undef_09 : dlx_sp_func := B"001001";
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constant sp_func_undef_0A : dlx_sp_func := B"001010";
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constant sp_func_undef_0B : dlx_sp_func := B"001011";
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constant sp_func_undef_0C : dlx_sp_func := B"001100";
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constant sp_func_undef_0D : dlx_sp_func := B"001101";
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constant sp_func_undef_0E : dlx_sp_func := B"001110";
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constant sp_func_undef_0F : dlx_sp_func := B"001111";
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constant sp_func_sequ : dlx_sp_func := B"010000";
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constant sp_func_sneu : dlx_sp_func := B"010001";
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constant sp_func_sltu : dlx_sp_func := B"010010";
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constant sp_func_sgtu : dlx_sp_func := B"010011";
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constant sp_func_sleu : dlx_sp_func := B"010100";
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constant sp_func_sgeu : dlx_sp_func := B"010101";
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constant sp_func_undef_16 : dlx_sp_func := B"010110";
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constant sp_func_undef_17 : dlx_sp_func := B"010111";
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constant sp_func_undef_18 : dlx_sp_func := B"011000";
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constant sp_func_undef_19 : dlx_sp_func := B"011001";
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constant sp_func_undef_1A : dlx_sp_func := B"011010";
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constant sp_func_undef_1B : dlx_sp_func := B"011011";
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constant sp_func_undef_1C : dlx_sp_func := B"011100";
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constant sp_func_undef_1D : dlx_sp_func := B"011101";
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constant sp_func_undef_1E : dlx_sp_func := B"011110";
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constant sp_func_undef_1F : dlx_sp_func := B"011111";
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constant sp_func_add : dlx_sp_func := B"100000";
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constant sp_func_addu : dlx_sp_func := B"100001";
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constant sp_func_sub : dlx_sp_func := B"100010";
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constant sp_func_subu : dlx_sp_func := B"100011";
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constant sp_func_and : dlx_sp_func := B"100100";
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constant sp_func_or : dlx_sp_func := B"100101";
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constant sp_func_xor : dlx_sp_func := B"100110";
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constant sp_func_undef_27 : dlx_sp_func := B"100111";
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constant sp_func_seq : dlx_sp_func := B"101000";
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constant sp_func_sne : dlx_sp_func := B"101001";
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constant sp_func_slt : dlx_sp_func := B"101010";
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constant sp_func_sgt : dlx_sp_func := B"101011";
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constant sp_func_sle : dlx_sp_func := B"101100";
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constant sp_func_sge : dlx_sp_func := B"101101";
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constant sp_func_undef_2E : dlx_sp_func := B"101110";
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constant sp_func_undef_2F : dlx_sp_func := B"101111";
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constant sp_func_movi2s : dlx_sp_func := B"110000";
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constant sp_func_movs2i : dlx_sp_func := B"110001";
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constant sp_func_movf : dlx_sp_func := B"110010";
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constant sp_func_movd : dlx_sp_func := B"110011";
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constant sp_func_movfp2i : dlx_sp_func := B"110100";
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constant sp_func_movi2fp : dlx_sp_func := B"110101";
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constant sp_func_undef_36 : dlx_sp_func := B"110110";
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constant sp_func_undef_37 : dlx_sp_func := B"110111";
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constant sp_func_undef_38 : dlx_sp_func := B"111000";
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constant sp_func_undef_39 : dlx_sp_func := B"111001";
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constant sp_func_undef_3A : dlx_sp_func := B"111010";
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constant sp_func_undef_3B : dlx_sp_func := B"111011";
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constant sp_func_undef_3C : dlx_sp_func := B"111100";
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constant sp_func_undef_3D : dlx_sp_func := B"111101";
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constant sp_func_undef_3E : dlx_sp_func := B"111110";
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constant sp_func_undef_3F : dlx_sp_func := B"111111";
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constant fp_func_addf : dlx_fp_func := B"00000";
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constant fp_func_subf : dlx_fp_func := B"00001";
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constant fp_func_multf : dlx_fp_func := B"00010";
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constant fp_func_divf : dlx_fp_func := B"00011";
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constant fp_func_addd : dlx_fp_func := B"00100";
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constant fp_func_subd : dlx_fp_func := B"00101";
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constant fp_func_multd : dlx_fp_func := B"00110";
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constant fp_func_divd : dlx_fp_func := B"00111";
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constant fp_func_cvtf2d : dlx_fp_func := B"01000";
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constant fp_func_cvtf2i : dlx_fp_func := B"01001";
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constant fp_func_cvtd2f : dlx_fp_func := B"01010";
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constant fp_func_cvtd2i : dlx_fp_func := B"01011";
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constant fp_func_cvti2f : dlx_fp_func := B"01100";
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constant fp_func_cvti2d : dlx_fp_func := B"01101";
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constant fp_func_mult : dlx_fp_func := B"01110";
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constant fp_func_div : dlx_fp_func := B"01111";
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constant fp_func_eqf : dlx_fp_func := B"10000";
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constant fp_func_nef : dlx_fp_func := B"10001";
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constant fp_func_ltf : dlx_fp_func := B"10010";
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constant fp_func_gtf : dlx_fp_func := B"10011";
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constant fp_func_lef : dlx_fp_func := B"10100";
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constant fp_func_gef : dlx_fp_func := B"10101";
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constant fp_func_multu : dlx_fp_func := B"10110";
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constant fp_func_divu : dlx_fp_func := B"10111";
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constant fp_func_eqd : dlx_fp_func := B"11000";
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constant fp_func_ned : dlx_fp_func := B"11001";
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constant fp_func_ltd : dlx_fp_func := B"11010";
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constant fp_func_gtd : dlx_fp_func := B"11011";
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constant fp_func_led : dlx_fp_func := B"11100";
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constant fp_func_ged : dlx_fp_func := B"11101";
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constant fp_func_undef_1E : dlx_fp_func := B"11110";
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constant fp_func_undef_1F : dlx_fp_func := B"11111";
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subtype dlx_opcode_num is natural range 0 to 63;
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subtype dlx_sp_func_num is natural range 0 to 63;
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subtype dlx_fp_func_num is natural range 0 to 31;
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subtype instr_name is string(1 to 8);
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type opcode_name_array is array (dlx_opcode_num) of instr_name;
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type sp_func_name_array is array (dlx_sp_func_num) of instr_name;
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type fp_func_name_array is array (dlx_fp_func_num) of instr_name;
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constant opcode_names : opcode_name_array;
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constant sp_func_names : sp_func_name_array;
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constant fp_func_names : fp_func_name_array;
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type immed_size is (immed_size_16, immed_size_26);
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subtype reg_index is natural range 0 to 31;
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constant link_reg : reg_index := 31;
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procedure write_instr (L : inout line; instr : in dlx_word);
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end dlx_instr;
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