From 9bdf6331a4867210cd0f7db3a350b8441cdd55c1 Mon Sep 17 00:00:00 2001
From: Mikael Pettersson <mikpelinux@gmail.com>
Date: Sat, 25 Jul 2020 16:07:44 +0200
Subject: [PATCH] sim: sim_boolean: handle ORCAB, 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 574b9ce..cd681e9 100644
--- a/erlang/apps/sim/src/sim_boolean.erl
+++ b/erlang/apps/sim/src/sim_boolean.erl
@@ -49,6 +49,7 @@
         , handle_IORI/4
         , handle_IORM/4
         , handle_ORCA/4
+        , handle_ORCAB/4
         , handle_ORCAI/4
         , handle_ORCAM/4
         , handle_SETCA/4
@@ -583,6 +584,20 @@ handle_ORCAM(Core, Mem, IR, EA) ->
                           fun(Core1, Mem1) -> handle_ORCAM(Core1, Mem1, IR, EA) end)
   end.
 
+-spec handle_ORCAB(#core{}, sim_mem:mem(), IR :: word(), #ea{})
+      -> {#core{}, sim_mem:mem(), {ok, integer()} | {error, {module(), term()}}}.
+handle_ORCAB(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 bnot CA) band ((1 bsl 36) - 1),
+      handle_ANDB(Core, Mem, AC, EA, Word);
+    {error, Reason} ->
+      sim_core:page_fault(Core, Mem, ea_address(EA), read, Reason,
+                          fun(Core1, Mem1) -> handle_ORCAB(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 4036602..965464f 100644
--- a/erlang/apps/sim/src/sim_core.erl
+++ b/erlang/apps/sim/src/sim_core.erl
@@ -300,6 +300,7 @@ dispatch(Core, Mem, IR, EA) ->
     8#454 -> sim_boolean:handle_ORCA(Core, Mem, IR, EA);
     8#455 -> sim_boolean:handle_ORCAI(Core, Mem, IR, EA);
     8#456 -> sim_boolean:handle_ORCAM(Core, Mem, IR, EA);
+    8#457 -> sim_boolean:handle_ORCAB(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 4a981bd..8bfe954 100644
--- a/erlang/apps/sim/test/sim_boolean_tests.erl
+++ b/erlang/apps/sim/test/sim_boolean_tests.erl
@@ -91,6 +91,7 @@
 -define(OP_ORCA, 8#454).
 -define(OP_ORCAI, 8#455).
 -define(OP_ORCAM, 8#456).
+-define(OP_ORCAB, 8#457).
 
 %% 2.4 Boolean Functions =======================================================
 
@@ -660,6 +661,18 @@ orcam_test() ->
          [ {#ea{section = 1, offset = 8#200, islocal = false}, ?COMMA2(-1, 8#373737)} % C(1,,200) = -1,,373737
          ]).
 
+orcab_test() ->
+  Prog =
+    [ {1, 8#100, ?INSN(?OP_MOVEI, 1, 0, 0, 8#707070)} % 1,,100/ MOVEI 1,707070
+    , {1, 8#101, ?INSN(?OP_ORCAB, 1, 0, 0, 8#200)}    % 1,,101/ ORCAB 1,200
+    , {1, 8#102, ?INSN_INVALID}                       % 1,,102/ <invalid>
+    , {1, 8#200, ?COMMA2(0, 8#303030)}                % 1,,200/ 0,,303030
+    ],
+  expect(Prog, [], {1, 8#102}, ?DEFAULT_FLAGS,
+         [ {#ea{section = 1, offset = 8#200, islocal = false}, ?COMMA2(-1, 8#373737)} % C(1,,200) = -1,,373737
+         , {#ea{section = 1, offset = 1, islocal = false}, ?COMMA2(-1, 8#373737)} % AC1 = -1,,373737
+         ]).
+
 %% Common code to run short sequences ==========================================
 
 expect(Prog, ACs, ExpectedPC, ExpectedFlags, ExpectedEs) ->