From da050eeddea5b3281d63e4f647a19c80880ebeae Mon Sep 17 00:00:00 2001
From: handsomeliu <handsomeliu@google.com>
Date: Fri, 3 Mar 2023 16:32:01 +0800
Subject: [PATCH] base: support calculating the intersection of two AddrRange

Change-Id: I2f089039c709fe4c3f7086263fb56470c7713bad
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/68617
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
---
 src/base/addr_range.hh | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/base/addr_range.hh b/src/base/addr_range.hh
index 07bd255d26..11fb1cd668 100644
--- a/src/base/addr_range.hh
+++ b/src/base/addr_range.hh
@@ -732,6 +732,22 @@ class AddrRange
     {
         return !(*this == r);
     }
+
+    /**
+     * @ingroup api_addr_range
+     */
+    AddrRange
+    operator&(const AddrRange& r) const
+    {
+        panic_if(this->interleaved() || r.interleaved(),
+                 "Cannot calculate intersection of interleaved ranges.");
+        Addr start = std::max(this->_start, r._start);
+        Addr end = std::min(this->_end, r._end);
+        if (end <= start) {
+            return AddrRange(0, 0);
+        }
+        return AddrRange(start, end);
+    }
 };
 
 static inline AddrRangeList