diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 8f2afe866c7cea3e9c5bd71dd491d283506ca12d..05a63c4e9a551116457ff1c12498f29bbfc27711 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -1978,15 +1978,15 @@ proc check_effective_target_riscv_v { } {
 
 proc check_effective_target_rvv_zvl256b_ok { } {
     # Check if the target has a VLENB of 32.
-    set gcc_march [regsub {[[:alnum:]]*} [riscv_get_arch] &v]
+    set gcc_march [riscv_get_arch]
     return [check_runtime ${gcc_march}_exec {
 	int main()
 	{
 	  int vlenb = 0;
 	  asm ("csrr %0,vlenb" : "=r" (vlenb) : : );
 	  if (vlenb == 32)
-	    return 1;
-	  return 0;
+	    return 0;
+	  return 1;
 	}
       } "-march=${gcc_march}"]
 }
@@ -1996,15 +1996,15 @@ proc check_effective_target_rvv_zvl256b_ok { } {
 
 proc check_effective_target_rvv_zvl512b_ok { } {
     # Check if the target has a VLENB of 64.
-    set gcc_march [regsub {[[:alnum:]]*} [riscv_get_arch] &v]
+    set gcc_march [riscv_get_arch]
     return [check_runtime ${gcc_march}_exec {
 	int main()
 	{
 	  int vlenb = 0;
 	  asm ("csrr %0,vlenb" : "=r" (vlenb) : : );
 	  if (vlenb == 64)
-	    return 1;
-	  return 0;
+	    return 0;
+	  return 1;
 	}
       } "-march=${gcc_march}"]
 }