From 9d146eae16499ea656de969ec26315521e5cd0e2 Mon Sep 17 00:00:00 2001
From: Ibrahim Burak Yorulmaz <iburaky@gmail.com>
Date: Sun, 20 Jul 2025 02:22:02 +0200
Subject: [PATCH] Fix VPI signal range order (#6189) (#6200)

---
 docs/CONTRIBUTORS            |  1 +
 src/V3EmitCSyms.cpp          |  4 ++--
 test_regress/t/t_vpi_var.cpp | 18 ++++++++++++++++++
 3 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/docs/CONTRIBUTORS b/docs/CONTRIBUTORS
index f82a13199..dceab099e 100644
--- a/docs/CONTRIBUTORS
+++ b/docs/CONTRIBUTORS
@@ -84,6 +84,7 @@ Huang Rui
 Huanghuang Zhou
 HungMingWu
 HyungKi Jeong
+Ibrahim Burak Yorulmaz
 Igor Zaworski
 Ilya Barkov
 Iru Cai
diff --git a/src/V3EmitCSyms.cpp b/src/V3EmitCSyms.cpp
index a07b431c6..c81020b64 100644
--- a/src/V3EmitCSyms.cpp
+++ b/src/V3EmitCSyms.cpp
@@ -964,9 +964,9 @@ void EmitCSyms::emitSymImp() {
                     } else {
                         if (basicp->isRanged()) {
                             bounds += " ,";
-                            bounds += cvtToStr(basicp->hi());
+                            bounds += cvtToStr(basicp->left());
                             bounds += ",";
-                            bounds += cvtToStr(basicp->lo());
+                            bounds += cvtToStr(basicp->right());
                             pdim++;
                         }
                         break;  // AstBasicDType - nothing below, 1
diff --git a/test_regress/t/t_vpi_var.cpp b/test_regress/t/t_vpi_var.cpp
index 2cb16563f..3a04f6831 100644
--- a/test_regress/t/t_vpi_var.cpp
+++ b/test_regress/t/t_vpi_var.cpp
@@ -360,6 +360,24 @@ int _mon_check_var() {
         p = vpi_get_str(vpiType, vh10);
         CHECK_RESULT_CSTR(p, "vpiConstant");
     }
+    TestVpiHandle vh6 = vpi_handle_by_index(vh5, 2);
+    CHECK_RESULT_NZ(vh6);
+    {
+        TestVpiHandle vh10 = vpi_handle(vpiLeftRange, vh6);
+        CHECK_RESULT_NZ(vh10);
+        vpi_get_value(vh10, &tmpValue);
+        CHECK_RESULT(tmpValue.value.integer, 0);
+        p = vpi_get_str(vpiType, vh10);
+        CHECK_RESULT_CSTR(p, "vpiConstant");
+    }
+    {
+        TestVpiHandle vh10 = vpi_handle(vpiRightRange, vh6);
+        CHECK_RESULT_NZ(vh10);
+        vpi_get_value(vh10, &tmpValue);
+        CHECK_RESULT(tmpValue.value.integer, 61);
+        p = vpi_get_str(vpiType, vh10);
+        CHECK_RESULT_CSTR(p, "vpiConstant");
+    }
 
     // C++ keyword collision
     {