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https://github.com/mikpe/pdp10-tools.git
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sim: sim_arithmetic: new, handle AOBJ[PN], add unit tests
This commit is contained in:
Mikael Pettersson
78
erlang/apps/sim/src/sim_arithmetic.erl
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78
erlang/apps/sim/src/sim_arithmetic.erl
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@@ -0,0 +1,78 @@
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%%% -*- erlang-indent-level: 2 -*-
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%%%
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%%% simulator for pdp10-elf
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%%% Copyright (C) 2020 Mikael Pettersson
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%%%
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%%% This file is part of pdp10-tools.
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%%%
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%%% pdp10-tools 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 3 of the License, or
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%%% (at your option) any later version.
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%%%
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%%% pdp10-tools 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 pdp10-tools. If not, see <http://www.gnu.org/licenses/>.
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%%%
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%%%=============================================================================
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%%%
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%%% 2.6 Arithmetic Testing
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-module(sim_arithmetic).
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-export([ handle_AOBJN/4
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, handle_AOBJP/4
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]).
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-include("sim_core.hrl").
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%% 2.6.1 Add One to Both Halves of AC and Jump =================================
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%% AOBJP - Add One to Both Halves of AC and Jump if Positive
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-spec handle_AOBJP(#core{}, sim_mem:mem(), IR :: word(), #ea{})
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-> {#core{}, sim_mem:mem(), {ok, integer()} | {error, {module(), term()}}}.
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handle_AOBJP(Core, Mem, IR, EA) ->
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%% Note: KA10 incorrectly does a 36-bit add with 8#000001000001 here instead
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%% of adjusting the two halves separately.
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AC = IR band 8#17,
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CA = sim_core:get_ac(Core, AC),
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Left = CA bsr 18,
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Right = CA band ((1 bsl 18) - 1),
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Left1 = (Left + 1) band ((1 bsl 18) - 1),
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Right1 = (Right + 1) band ((1 bsl 18) - 1),
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CA1 = (Left1 bsl 18) bor Right1,
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Core1 = sim_core:set_ac(Core, AC, CA1),
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case Left1 band (1 bsl 17) of
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0 -> jump(Core1, Mem, EA);
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_ -> sim_core:next_pc(Core1, Mem)
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end.
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%% AOBJN - Add One to Both Halves of AC and Jump if Negative
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-spec handle_AOBJN(#core{}, sim_mem:mem(), IR :: word(), #ea{})
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-> {#core{}, sim_mem:mem(), {ok, integer()} | {error, {module(), term()}}}.
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handle_AOBJN(Core, Mem, IR, EA) ->
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%% Note: KA10 incorrectly does a 36-bit add with 8#000001000001 here instead
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%% of adjusting the two halves separately.
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AC = IR band 8#17,
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CA = sim_core:get_ac(Core, AC),
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Left = CA bsr 18,
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Right = CA band ((1 bsl 18) - 1),
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Left1 = (Left + 1) band ((1 bsl 18) - 1),
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Right1 = (Right + 1) band ((1 bsl 18) - 1),
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CA1 = (Left1 bsl 18) bor Right1,
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Core1 = sim_core:set_ac(Core, AC, CA1),
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case Left1 band (1 bsl 17) of
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0 -> sim_core:next_pc(Core1, Mem);
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_ -> jump(Core1, Mem, EA)
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end.
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%% Miscellaneous ===============================================================
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jump(Core, Mem, EA) ->
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sim_core:run(Core#core{pc_offset = EA#ea.offset}, Mem).
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@@ -282,6 +282,8 @@ dispatch(Core, Mem, IR, EA) ->
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8#217 -> sim_moves:handle_MOVMS(Core, Mem, IR, EA);
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8#250 -> sim_moves:handle_EXCH(Core, Mem, IR, EA);
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8#251 -> sim_moves:handle_BLT(Core, Mem, IR, EA);
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8#252 -> sim_arithmetic:handle_AOBJP(Core, Mem, IR, EA);
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8#253 -> sim_arithmetic:handle_AOBJN(Core, Mem, IR, EA);
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8#260 -> sim_stack:handle_PUSHJ(Core, Mem, IR, EA);
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8#261 -> sim_stack:handle_PUSH(Core, Mem, IR, EA);
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8#262 -> sim_stack:handle_POP(Core, Mem, IR, EA);
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144
erlang/apps/sim/test/sim_arithmetic_tests.erl
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144
erlang/apps/sim/test/sim_arithmetic_tests.erl
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@@ -0,0 +1,144 @@
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%%% -*- erlang-indent-level: 2 -*-
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%%%
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%%% simulator for pdp10-elf
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%%% Copyright (C) 2020 Mikael Pettersson
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%%%
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%%% This file is part of pdp10-tools.
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%%%
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%%% pdp10-tools 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 3 of the License, or
|
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%%% (at your option) any later version.
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%%%
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%%% pdp10-tools 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 pdp10-tools. If not, see <http://www.gnu.org/licenses/>.
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%%%
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%%%=============================================================================
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%%%
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%%% Test cases for 2.6 Arithmetic Testing
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-module(sim_arithmetic_tests).
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-include("../src/sim_core.hrl").
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-include_lib("eunit/include/eunit.hrl").
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-define(DEFAULT_FLAGS, (1 bsl ?PDP10_PF_USER)).
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-define(LOW18(X), ((X) band ((1 bsl 18) - 1))).
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-define(INSN(OP, AC, I, X, Y),
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(((OP) bsl (35 - 8)) bor
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((AC) bsl (35 - 12)) bor
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((I) bsl (35 - 13)) bor
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((X) bsl (35 - 17)) bor
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?LOW18(Y))).
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-define(COMMA2(LEFT, RIGHT), ((?LOW18(LEFT) bsl 18) bor ?LOW18(RIGHT))). % LEFT,,RIGHT in MACRO-10
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-define(EA(S, O), #ea{section = S, offset = O, islocal = false}).
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-define(AC(A), ?EA(1, A)).
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-define(INSN_INVALID, ?INSN(0, 0, 0, 0, 0)).
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-define(OP_MOVSI, 8#205).
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-define(OP_AOBJP, 8#252).
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-define(OP_AOBJN, 8#253).
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%% 2.6.1 Add One to Both Halves of AC and Jump =================================
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%% AOBJP - Add One to Both Halves of AC and Jump if Positive
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aobjp_test() ->
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Prog1 =
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[ {1, 8#100, ?INSN(?OP_MOVSI, 1, 0, 0, -2)} % 1,,100/ MOVSI 1,-2
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, {1, 8#101, ?INSN(?OP_AOBJP, 1, 0, 0, 8#103)} % 1,,101/ AOBJP 1,103
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, {1, 8#102, ?INSN_INVALID} % 1,,102/ <invalid>
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, {1, 8#103, ?INSN_INVALID} % 1,,103/ <invalid>
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],
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expect(Prog1, [], {1, 8#102}, ?DEFAULT_FLAGS, % no jump
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[{?AC(1), ?COMMA2(-1, 1)} % AC1 = -1,,1
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]),
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Prog2 =
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[ {1, 8#100, ?INSN(?OP_MOVSI, 1, 0, 0, -1)} % 1,,100/ MOVSI 1,-1
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, {1, 8#101, ?INSN(?OP_AOBJP, 1, 0, 0, 8#103)} % 1,,101/ AOBJP 1,103
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, {1, 8#102, ?INSN_INVALID} % 1,,102/ <invalid>
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, {1, 8#103, ?INSN_INVALID} % 1,,103/ <invalid>
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],
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expect(Prog2, [], {1, 8#103}, ?DEFAULT_FLAGS, % jump
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[{?AC(1), ?COMMA2(0, 1)} % AC1 = 0,,1
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]).
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%% AOBJN - Add One to Both Halves of AC and Jump if Negative
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aobjn_test() ->
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Prog1 =
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[ {1, 8#100, ?INSN(?OP_MOVSI, 1, 0, 0, -2)} % 1,,100/ MOVSI 1,-2
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, {1, 8#101, ?INSN(?OP_AOBJN, 1, 0, 0, 8#103)} % 1,,101/ AOBJN 1,103
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, {1, 8#102, ?INSN_INVALID} % 1,,102/ <invalid>
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, {1, 8#103, ?INSN_INVALID} % 1,,103/ <invalid>
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],
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expect(Prog1, [], {1, 8#103}, ?DEFAULT_FLAGS, % jump
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[{?AC(1), ?COMMA2(-1, 1)} % AC1 = -1,,1
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]),
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Prog2 =
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[ {1, 8#100, ?INSN(?OP_MOVSI, 1, 0, 0, -1)} % 1,,100/ MOVSI 1,-1
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, {1, 8#101, ?INSN(?OP_AOBJN, 1, 0, 0, 8#103)} % 1,,101/ AOBJN 1,103
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, {1, 8#102, ?INSN_INVALID} % 1,,102/ <invalid>
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, {1, 8#103, ?INSN_INVALID} % 1,,103/ <invalid>
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],
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expect(Prog2, [], {1, 8#102}, ?DEFAULT_FLAGS, % no jump
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[{?AC(1), ?COMMA2(0, 1)} % AC1 = 0,,1
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]).
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%% Common code to run short sequences ==========================================
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expect(Prog, ACs, ExpectedPC, ExpectedFlags, ExpectedEs) ->
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{Core, Mem} = init(Prog, ACs),
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{Core1, Mem1, {error, {sim_core, {dispatch, PC, _IR, _EA}}}} = sim_core:run(Core, Mem),
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ActualPC = {PC bsr 18, PC band ((1 bsl 18) - 1)},
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?assertEqual(ExpectedPC, ActualPC),
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?assertEqual(ExpectedFlags, Core1#core.flags),
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lists:foreach(fun({EA, ExpectedE}) ->
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{ok, ActualE} = sim_core:c(Core1, Mem1, EA),
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?assertEqual(ExpectedE, ActualE)
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end, ExpectedEs),
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sim_mem:delete(Mem).
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init(Prog, ACs) ->
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{PCSection, PCOffset} = prog_pc(Prog),
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Mem = init_mem(Prog),
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Core = init_core(PCSection, PCOffset, ACs),
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{Core, Mem}.
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prog_pc([{Section, Offset, _Word} | _Rest]) -> {Section, Offset}.
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init_mem(Prog) -> init_mem(Prog, sim_mem:new()).
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init_mem([], Mem) -> Mem;
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init_mem([{Section, Offset, Word} | Rest], Mem) ->
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init_word(Section, Offset, Word, Mem),
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init_mem(Rest, Mem).
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init_word(Section, Offset, Word, Mem) ->
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Address = (Section bsl 18) bor Offset,
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PFN = Address bsr 9,
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case sim_mem:mquery(Mem, PFN) of
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false -> sim_mem:mmap(Mem, PFN, 4+2, core);
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{_Prot, _What} -> ok
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end,
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ok = sim_mem:write_word(Mem, Address, Word).
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init_core(PCSection, PCOffset, ACs) ->
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#core{ pc_section = PCSection
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, pc_offset = PCOffset
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, acs = init_acs(ACs, list_to_tuple(lists:duplicate(16, 0)))
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, flags = ?DEFAULT_FLAGS
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}.
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init_acs([], ACS) -> ACS;
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init_acs([{AC, Val} | Rest], ACS) -> init_acs(Rest, setelement(AC + 1, Val, ACS)).
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