From 1b81f19557c2ec12e13ff2a4f11458a2cfac3197 Mon Sep 17 00:00:00 2001
From: Holger Vogt <holger.vogt@uni-due.de>
Date: Sun, 11 May 2025 09:14:02 +0200
Subject: [PATCH] Prepare BSIM4.7 for instance flag dtemp FIXME: The dtemp
 value is not yet linked to the model!

---
 src/spicelib/devices/bsim4v7/b4v7.c       | 1 +
 src/spicelib/devices/bsim4v7/b4v7ask.c    | 3 +++
 src/spicelib/devices/bsim4v7/b4v7par.c    | 4 ++++
 src/spicelib/devices/bsim4v7/b4v7set.c    | 3 ++-
 src/spicelib/devices/bsim4v7/bsim4v7def.h | 3 +++
 5 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/spicelib/devices/bsim4v7/b4v7.c b/src/spicelib/devices/bsim4v7/b4v7.c
index f1d70b209..cb46a904c 100644
--- a/src/spicelib/devices/bsim4v7/b4v7.c
+++ b/src/spicelib/devices/bsim4v7/b4v7.c
@@ -57,6 +57,7 @@ IOP( "mulu0", BSIM4v7_MULU0, IF_REAL, "Low field mobility multiplier"),
 IOP( "xgw",  BSIM4v7_XGW, IF_REAL, "Distance from gate contact center to device edge"),
 IOP( "ngcon", BSIM4v7_NGCON, IF_REAL, "Number of gate contacts"),
 IOP( "wnflag", BSIM4v7_WNFLAG, IF_INTEGER, "W/NF device flag for bin selection"),
+IOPU( "dtemp", BSIM4v7_DTEMP, IF_REAL,    "Instance temperature difference"),
 
 IOP( "trnqsmod", BSIM4v7_TRNQSMOD, IF_INTEGER, "Transient NQS model selector"),
 IOP( "acnqsmod", BSIM4v7_ACNQSMOD, IF_INTEGER, "AC NQS model selector"),
diff --git a/src/spicelib/devices/bsim4v7/b4v7ask.c b/src/spicelib/devices/bsim4v7/b4v7ask.c
index 19690eda9..f20dc692b 100644
--- a/src/spicelib/devices/bsim4v7/b4v7ask.c
+++ b/src/spicelib/devices/bsim4v7/b4v7ask.c
@@ -114,6 +114,9 @@ BSIM4v7instance *here = (BSIM4v7instance*)inst;
         case BSIM4v7_MULU0:
             value->rValue = here->BSIM4v7mulu0;
             return(OK);
+        case BSIM4v7_DTEMP:
+            value->rValue = here->BSIM4v7dtemp;
+            return(OK);
         case BSIM4v7_WNFLAG:
             value->iValue = here->BSIM4v7wnflag;
             return(OK);
diff --git a/src/spicelib/devices/bsim4v7/b4v7par.c b/src/spicelib/devices/bsim4v7/b4v7par.c
index d8bdd6d3d..e4c5a099a 100644
--- a/src/spicelib/devices/bsim4v7/b4v7par.c
+++ b/src/spicelib/devices/bsim4v7/b4v7par.c
@@ -141,6 +141,10 @@ IFvalue *select)
             here->BSIM4v7mulu0 = value->rValue;
             here->BSIM4v7mulu0Given = TRUE;
             break;
+        case BSIM4v7_DTEMP:
+            here->BSIM4v7dtemp = value->rValue;
+            here->BSIM4v7dtempGiven = TRUE;
+            return(OK);
         case BSIM4v7_WNFLAG:
             here->BSIM4v7wnflag = value->iValue;
             here->BSIM4v7wnflagGiven = TRUE;
diff --git a/src/spicelib/devices/bsim4v7/b4v7set.c b/src/spicelib/devices/bsim4v7/b4v7set.c
index ed2fd017f..1d3246b47 100644
--- a/src/spicelib/devices/bsim4v7/b4v7set.c
+++ b/src/spicelib/devices/bsim4v7/b4v7set.c
@@ -2256,8 +2256,9 @@ BSIM4v7instance **InstArray;
                 here->BSIM4v7xgw = model->BSIM4v7xgw;
             if (!here->BSIM4v7ngconGiven)
                 here->BSIM4v7ngcon = model->BSIM4v7ngcon;
+            if (!here->BSIM4v7dtempGiven)
+                here->BSIM4v7dtemp = 0;
 
-                    
             /* Process instance model selectors, some
              * may override their global counterparts
              */
diff --git a/src/spicelib/devices/bsim4v7/bsim4v7def.h b/src/spicelib/devices/bsim4v7/bsim4v7def.h
index e4c1f1adc..073bec7ff 100644
--- a/src/spicelib/devices/bsim4v7/bsim4v7def.h
+++ b/src/spicelib/devices/bsim4v7/bsim4v7def.h
@@ -116,6 +116,7 @@ typedef struct sBSIM4v7instance
     int BSIM4v7wnflag;
     double BSIM4v7xgw;
     double BSIM4v7ngcon;
+    double BSIM4v7dtemp;
 
      /* added here to account stress effect instance dependence */
     double BSIM4v7u0temp;
@@ -302,6 +303,7 @@ typedef struct sBSIM4v7instance
     unsigned BSIM4v7wnflagGiven   :1;
     unsigned BSIM4v7xgwGiven   :1;
     unsigned BSIM4v7ngconGiven   :1;
+    unsigned BSIM4v7dtempGiven : 1;
     unsigned BSIM4v7icVDSGiven :1;
     unsigned BSIM4v7icVGSGiven :1;
     unsigned BSIM4v7icVBSGiven :1;
@@ -2843,6 +2845,7 @@ typedef struct sBSIM4v7model
 #define BSIM4v7_M                   38
 #define BSIM4v7_MULU0               39
 #define BSIM4v7_WNFLAG              40
+#define BSIM4v7_DTEMP               41
 
 /* Global parameters */
 #define BSIM4v7_MOD_TEMPEOT         65