From 3ebd48a11c540ad8c63d3cf73835e6c99a5edddc Mon Sep 17 00:00:00 2001
From: burgholzer <burgholzer@me.com>
Date: Tue, 21 Jan 2025 17:18:46 +0100
Subject: [PATCH] =?UTF-8?q?=F0=9F=90=9B=20use=20fuzzy=20comparison=20for?=
 =?UTF-8?q?=20floating=20point=20in=20const=20evaluation=20equality=20chec?=
 =?UTF-8?q?k?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: burgholzer <burgholzer@me.com>
---
 .../mqt-core/ir/parsers/qasm3_parser/passes/ConstEvalPass.hpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/mqt-core/ir/parsers/qasm3_parser/passes/ConstEvalPass.hpp b/include/mqt-core/ir/parsers/qasm3_parser/passes/ConstEvalPass.hpp
index 30c67df18..293018630 100644
--- a/include/mqt-core/ir/parsers/qasm3_parser/passes/ConstEvalPass.hpp
+++ b/include/mqt-core/ir/parsers/qasm3_parser/passes/ConstEvalPass.hpp
@@ -18,6 +18,7 @@
 
 #include <cstddef>
 #include <cstdint>
+#include <limits>
 #include <memory>
 #include <optional>
 #include <string>
@@ -65,7 +66,8 @@ struct ConstEvalValue {
     case ConstUint:
       return std::get<0>(value) == std::get<0>(rhs.value);
     case ConstFloat:
-      return std::get<1>(value) == std::get<1>(rhs.value);
+      return std::abs(std::get<1>(value) - std::get<1>(rhs.value)) <
+             std::numeric_limits<double>::epsilon() * 1024;
     case ConstBool:
       return std::get<2>(value) == std::get<2>(rhs.value);
     }