diff --git a/src/isa/riscv64/Kconfig b/src/isa/riscv64/Kconfig
index 339064061..1d69cd858 100644
--- a/src/isa/riscv64/Kconfig
+++ b/src/isa/riscv64/Kconfig
@@ -586,6 +586,11 @@ config RVV_AGNOSTIC
   bool "Enable RVV agnostic policy"
   default y
 
+config RVV_UNORDER
+  depends on RVV
+  bool "Enable RVV unorder compute"
+  default y
+
 config EBREAK_AS_TRAP
   depends on !RV_DEBUG
   bool "Treat ebreak same as nemu_trap"
diff --git a/src/isa/riscv64/instr/rvv/vcompute.h b/src/isa/riscv64/instr/rvv/vcompute.h
index 65fedb75d..e680dbc3d 100644
--- a/src/isa/riscv64/instr/rvv/vcompute.h
+++ b/src/isa/riscv64/instr/rvv/vcompute.h
@@ -971,10 +971,10 @@ def_EHelper(vfadd) {
 }
 
 def_EHelper(vfredusum) {
-#ifdef CONFIG_DIFFTEST
-  FREDUCTION(FREDUSUM)    // use ordered reduction
-#else
+#ifdef CONFIG_RVV_UNORDER
   float_reduction_computing(s);   // when NEMU is ref, use unordered reduction which is same as XiangShan
+#else
+  FREDUCTION(FREDUSUM)    // use ordered reduction
 #endif
 }