From a59407a215d6112c2e20b1a746b33742209e5f87 Mon Sep 17 00:00:00 2001
From: Julian Blake Kongslie
Date: Sun, 16 Oct 2022 16:24:49 -0700
Subject: Support for log-based event model

---
 isa/checker.cpp | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

(limited to 'isa/checker.cpp')

diff --git a/isa/checker.cpp b/isa/checker.cpp
index 1919bd1..7bca5c9 100644
--- a/isa/checker.cpp
+++ b/isa/checker.cpp
@@ -4,16 +4,17 @@
 #include "isa/isa.h"
 
 void checker::execute() {
-    assert(!halted);
-    auto int_enable_delay = ctlregs[INT_ENABLE] >> 1;
-    if (ctlregs[INT_ENABLE] & 1) {
-        // check for interrupt
-    }
-    ctlregs[INT_ENABLE] = (int_enable_delay << 1) | int_enable_delay;
+    bool interrupt = system.interact(ctlregs);
+
+    if (ctlregs[HALTED])
+        return;
+
     inst = decode(ctlregs[DATA_INSTRUCTION_FIELD_BUFFER],
                   pc,
-                  mem.fetch(pc));
+                  mem.fetch(pc),
+                  interrupt);
     auto next_pc = inst.next_pc;
+
     if (inst.need_indirect_load) {
         auto addr = mem.fetch(inst.init_address.value());
         if (inst.need_autoinc_store)
@@ -22,8 +23,10 @@ void checker::execute() {
     } else {
         assert(!inst.need_autoinc_store);
     }
+
     if (inst.need_exec_load)
         inst.data = mem.fetch(inst.final_address.value());
+
     if (inst.need_read_acc)
         inst.acc = acc;
     if (inst.need_read_link)
@@ -32,7 +35,9 @@ void checker::execute() {
         inst.mq = mq;
     if (inst.read_ctlreg.has_value())
         inst.ctlval = ctlregs[*inst.read_ctlreg];
+
     inst.execute();
+
     if (inst.need_write_acc)
         acc = inst.acc.value();
     if (inst.need_write_link)
@@ -41,9 +46,10 @@ void checker::execute() {
         mq = inst.mq.value();
     if (inst.write_ctlreg.has_value())
         ctlregs[*inst.write_ctlreg] = inst.ctlval.value();
+
     if (inst.need_exec_store)
         mem.store(inst.final_address.value(), inst.data.value());
+
     assert(inst.next_pc == next_pc || inst.possibly_redirects);
     pc = inst.next_pc;
-    halted = inst.halt;
 }
-- 
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