From 62517a8004419591dd031faebb7a9a4827bc002a Mon Sep 17 00:00:00 2001
From: Julian Blake Kongslie
Date: Tue, 1 Nov 2022 10:08:59 -0700
Subject: Support writing a trace at the end of execution.

---
 io/model.cpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'io/model.cpp')

diff --git a/io/model.cpp b/io/model.cpp
index 79bc511..81cf318 100644
--- a/io/model.cpp
+++ b/io/model.cpp
@@ -1,6 +1,7 @@
 #include <array>
 #include <cassert>
 #include <cstdint>
+#include <fmt/format.h>
 #include <iostream>
 #include <utility>
 
@@ -85,3 +86,19 @@ void iomodel::load_evt(std::istream &fh) {
         }
     }
 }
+
+std::ostream & iomodel::write_evt(std::ostream &fh) {
+    std::uint64_t time = 0;
+    for (const auto &e : log) {
+        if (e.first != time) {
+            fh << fmt::format("+{}\n", e.first - time);
+            time = e.first;
+        }
+        if (e.second.mask == ~(std::uint_fast32_t)0) {
+            fh << fmt::format("{}=0x{:x}\n", ctlreg_names[e.second.reg], e.second.value);
+        } else {
+            fh << fmt::format("{}=0x{:x}/0x{:x}\n", ctlreg_names[e.second.reg], e.second.value, e.second.mask);
+        }
+    }
+    return fh;
+}
-- 
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