From 6e6b176e78f402de35a704930a4281ea9b5e23ae Mon Sep 17 00:00:00 2001
From: Mikael Pettersson <mikpelinux@gmail.com>
Date: Fri, 24 Jul 2020 19:45:22 +0200
Subject: [PATCH] sim: sim_boolean: handle IORB, add unit test

---
 erlang/apps/sim/src/sim_boolean.erl        | 15 +++++++++++++++
 erlang/apps/sim/src/sim_core.erl           |  1 +
 erlang/apps/sim/test/sim_boolean_tests.erl | 13 +++++++++++++
 3 files changed, 29 insertions(+)

diff --git a/erlang/apps/sim/src/sim_boolean.erl b/erlang/apps/sim/src/sim_boolean.erl
index 8b6ad74..8c583ff 100644
--- a/erlang/apps/sim/src/sim_boolean.erl
+++ b/erlang/apps/sim/src/sim_boolean.erl
@@ -37,6 +37,7 @@
         , handle_ANDI/4
         , handle_ANDM/4
         , handle_IOR/4
+        , handle_IORB/4
         , handle_IORI/4
         , handle_IORM/4
         , handle_SETMB/4
@@ -386,6 +387,20 @@ handle_IORM(Core, Mem, IR, EA) ->
                           fun(Core1, Mem1) -> handle_IORM(Core1, Mem1, IR, EA) end)
   end.
 
+-spec handle_IORB(#core{}, sim_mem:mem(), IR :: word(), #ea{})
+      -> {#core{}, sim_mem:mem(), {ok, integer()} | {error, {module(), term()}}}.
+handle_IORB(Core, Mem, IR, EA) ->
+  case sim_core:c(Core, Mem, EA) of
+    {ok, CE} ->
+      AC = IR band 8#17,
+      CA = sim_core:get_ac(Core, AC),
+      Word = CE bor CA,
+      handle_ANDB(Core, Mem, AC, EA, Word);
+    {error, Reason} ->
+      sim_core:page_fault(Core, Mem, ea_address(EA), read, Reason,
+                          fun(Core1, Mem1) -> handle_IORB(Core1, Mem1, IR, EA) end)
+  end.
+
 %% Miscellaneous ===============================================================
 
 ea_address(#ea{section = Section, offset = Offset}) ->
diff --git a/erlang/apps/sim/src/sim_core.erl b/erlang/apps/sim/src/sim_core.erl
index d5df89b..1e89d13 100644
--- a/erlang/apps/sim/src/sim_core.erl
+++ b/erlang/apps/sim/src/sim_core.erl
@@ -284,6 +284,7 @@ dispatch(Core, Mem, IR, EA) ->
     8#434 -> sim_boolean:handle_IOR(Core, Mem, IR, EA);
     8#435 -> sim_boolean:handle_IORI(Core, Mem, IR, EA);
     8#436 -> sim_boolean:handle_IORM(Core, Mem, IR, EA);
+    8#437 -> sim_boolean:handle_IORB(Core, Mem, IR, EA);
     _ ->
       PC = (Core#core.pc_section bsl 18) bor Core#core.pc_offset,
       {Core, Mem, {error, {?MODULE, {dispatch, PC, IR, EA}}}}
diff --git a/erlang/apps/sim/test/sim_boolean_tests.erl b/erlang/apps/sim/test/sim_boolean_tests.erl
index 08545c2..2898d1c 100644
--- a/erlang/apps/sim/test/sim_boolean_tests.erl
+++ b/erlang/apps/sim/test/sim_boolean_tests.erl
@@ -75,6 +75,7 @@
 -define(OP_IOR, 8#434).
 -define(OP_IORI, 8#435).
 -define(OP_IORM, 8#436).
+-define(OP_IORB, 8#437).
 
 %% 2.4 Boolean Functions =======================================================
 
@@ -461,6 +462,18 @@ iorm_test() ->
          [ {#ea{section = 1, offset = 8#200, islocal = false}, 8#777777} % C(1,,200) = 0,,-1
          ]).
 
+iorb_test() ->
+  Prog =
+    [ {1, 8#100, ?INSN(?OP_MOVEI, 1, 0, 0, 8#707070)} % 1,,100/ MOVEI 1,707070
+    , {1, 8#101, ?INSN(?OP_IORB, 1, 0, 0, 8#200)}     % 1,,101/ IORB 1,200
+    , {1, 8#102, ?INSN_INVALID}                       % 1,,102/ <invalid>
+    , {1, 8#200, ?COMMA2(0, 8#070707)}                % 1,,200/ 0,,070707
+    ],
+  expect(Prog, [], {1, 8#102}, ?DEFAULT_FLAGS,
+         [ {#ea{section = 1, offset = 8#200, islocal = false}, 8#777777} % C(1,,200) = 0,,-1
+         , {#ea{section = 1, offset = 1, islocal = false}, 8#777777} % AC1 = 0,,-1
+         ]).
+
 %% Common code to run short sequences ==========================================
 
 expect(Prog, ACs, ExpectedPC, ExpectedFlags, ExpectedEs) ->