From d03f1b67a2ed2f3eeeb7b07c897e56213080d38b Mon Sep 17 00:00:00 2001
From: Mark Pizzolato <mark@infocomm.com>
Date: Tue, 15 Mar 2022 08:19:25 -0700
Subject: [PATCH] PDP11: Only compute vector ibit when it will be used
 (Coverity)

---
 PDP11/pdp11_io_lib.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/PDP11/pdp11_io_lib.c b/PDP11/pdp11_io_lib.c
index 84f9adfb..adf86e03 100644
--- a/PDP11/pdp11_io_lib.c
+++ b/PDP11/pdp11_io_lib.c
@@ -325,8 +325,8 @@ if (dibp->vnum > VEC_DEVMAX)
     return SCPE_IERR;
 vec = dibp->vec;
 ilvl = dibp->vloc / 32;
-ibit = dibp->vloc % 32;
 #if (VEC_SET != 0)
+ibit = dibp->vloc % 32;
 if (vec)
     vec |= (int_vec_set[ilvl][ibit] & ~3);
 #endif
@@ -347,8 +347,8 @@ if (vec && !(sim_switches & SWMASK ('P'))) {
             }
         cdvec = cdibp->vec;
         ilvl = cdibp->vloc / 32;
-        ibit = cdibp->vloc % 32;
 #if (VEC_SET != 0)
+        ibit = cdibp->vloc % 32;
         if (cdvec)
             cdvec |= (int_vec_set[ilvl][ibit] & ~3);
 #endif