From 3f9e255a90619e78ede22cc04ca91940ee6b2b2c Mon Sep 17 00:00:00 2001
From: Stefan Frederik <stefan.schippers@gmail.com>
Date: Sun, 24 Oct 2021 01:41:01 +0200
Subject: [PATCH] added symbols xnor2_1.sym, xor3_1.sym, xor4_1.sym in
 xschem_library/xschem_simulator

---
 src/token.c                                 |  4 ++-
 xschem_library/xschem_simulator/xnor2_1.sym | 30 ++++++++++++++++++
 xschem_library/xschem_simulator/xor3_1.sym  | 31 +++++++++++++++++++
 xschem_library/xschem_simulator/xor4_1.sym  | 34 +++++++++++++++++++++
 4 files changed, 98 insertions(+), 1 deletion(-)
 create mode 100644 xschem_library/xschem_simulator/xnor2_1.sym
 create mode 100644 xschem_library/xschem_simulator/xor3_1.sym
 create mode 100644 xschem_library/xschem_simulator/xor4_1.sym

diff --git a/src/token.c b/src/token.c
index 368c84fa..d868ef25 100644
--- a/src/token.c
+++ b/src/token.c
@@ -2717,7 +2717,9 @@ int isonlydigit(const char *s)
     return 1;
 }
 
-
+/* find nth occurrence of substring in str separated by sep. 1st substring is position 1
+ * find_nth("aaa,bbb,ccc,ddd", ',', 2)  --> "bbb"
+ */
 const char *find_nth(const char *str, char sep, int n)
 {
   static char *result=NULL;
diff --git a/xschem_library/xschem_simulator/xnor2_1.sym b/xschem_library/xschem_simulator/xnor2_1.sym
new file mode 100644
index 00000000..37a51cad
--- /dev/null
+++ b/xschem_library/xschem_simulator/xnor2_1.sym
@@ -0,0 +1,30 @@
+v {xschem version=3.0.0 file_version=1.2 }
+G {}
+K {type=primitive
+format="@name @@A @@B @VGND @VNB @VPB @VPWR @@X @prefix\\\\xnor2_1"
+template="name=x1 VGND=VGND VNB=VNB VPB=VPB VPWR=VPWR prefix=sky130_fd_sc_hd__ "
+extra="VGND VNB VPB VPWR prefix"
+highlight=true
+function2="0 1 ^ ~"}
+V {}
+S {}
+E {}
+L 4 -60 -20 -35 -20 {}
+L 4 -60 20 -35 20 {}
+L 4 -30 -30 -15 -30 {}
+L 4 -30 30 -15 30 {}
+L 4 45 0 60 0 {}
+B 5 -62.5 -22.5 -57.5 -17.5 {name=A dir=in goto=2 
+function2="0 1 ^"}
+B 5 -62.5 17.5 -57.5 22.5 {name=B dir=in goto=2 }
+B 5 57.5 -2.5 62.5 2.5 {name=X dir=out }
+A 4 -77.5 0 56.18051263561058 327.7243556854224 64.55128862915524 {}
+A 4 -21.07142857142857 36.78571428571428 67.06112046149408 33.26691584358777 51.53865524867743 {}
+A 4 -21.07142857142857 -36.78571428571428 67.06112046149408 275.1944289077348 51.53865524867743 {}
+A 4 -87.5 0 56.18051263561058 327.7243556854224 64.55128862915524 {}
+A 4 40 0 5 0 360 {}
+T {A} -55 -34 0 0 0.2 0.2 {}
+T {B} -55 6 0 0 0.2 0.2 {}
+T {X} 55 -14 0 1 0.2 0.2 {}
+T {@name} -16.25 -5 0 0 0.2 0.2 {}
+T {@symname} -25 -45 0 0 0.2 0.2 {}
diff --git a/xschem_library/xschem_simulator/xor3_1.sym b/xschem_library/xschem_simulator/xor3_1.sym
new file mode 100644
index 00000000..7d8f716a
--- /dev/null
+++ b/xschem_library/xschem_simulator/xor3_1.sym
@@ -0,0 +1,31 @@
+v {xschem version=3.0.0 file_version=1.2 }
+G {}
+K {type=primitive
+format="@name @@A @@B @@C @VGND @VNB @VPB @VPWR @@X @prefix\\\\xor3_1"
+template="name=x1 VGND=VGND VNB=VNB VPB=VPB VPWR=VPWR prefix=sky130_fd_sc_hd__ "
+extra="VGND VNB VPB VPWR prefix"
+highlight=true
+function3="0 1 2 ^ ^"}
+V {}
+S {}
+E {}
+L 4 -60 -20 -35 -20 {}
+L 4 -60 0 -31.25 0 {}
+L 4 35 0 60 0 {}
+L 4 -30 -30 -15 -30 {}
+L 4 -30 30 -15 30 {}
+L 4 -60 20 -35 20 {}
+B 5 -62.5 -22.5 -57.5 -17.5 {name=A dir=in goto=3}
+B 5 -62.5 -2.5 -57.5 2.5 {name=B dir=in goto=3}
+B 5 -62.5 17.5 -57.5 22.5 {name=C dir=in goto=3}
+B 5 57.5 -2.5 62.5 2.5 {name=X dir=out }
+A 4 -77.5 0 56.18051263561058 327.7243556854224 64.55128862915524 {}
+A 4 -21.07142857142857 36.78571428571428 67.06112046149408 33.26691584358777 51.53865524867743 {}
+A 4 -21.07142857142857 -36.78571428571428 67.06112046149408 275.1944289077348 51.53865524867743 {}
+A 4 -87.5 0 56.18051263561058 327.7243556854224 64.55128862915524 {}
+T {A} -55 -34 0 0 0.2 0.2 {}
+T {B} -55 -14 0 0 0.2 0.2 {}
+T {X} 55 -14 0 1 0.2 0.2 {}
+T {@name} -16.25 -5 0 0 0.2 0.2 {}
+T {@symname} -25 -45 0 0 0.2 0.2 {}
+T {C} -55 6 0 0 0.2 0.2 {}
diff --git a/xschem_library/xschem_simulator/xor4_1.sym b/xschem_library/xschem_simulator/xor4_1.sym
new file mode 100644
index 00000000..6fb36677
--- /dev/null
+++ b/xschem_library/xschem_simulator/xor4_1.sym
@@ -0,0 +1,34 @@
+v {xschem version=3.0.0 file_version=1.2 }
+G {}
+K {type=primitive
+format="@name @@A @@B @@C @@D @VGND @VNB @VPB @VPWR @@X @prefix\\\\xor4_1"
+template="name=x1 VGND=VGND VNB=VNB VPB=VPB VPWR=VPWR prefix=sky130_fd_sc_hd__ "
+extra="VGND VNB VPB VPWR prefix"
+highlight=true
+function4="0 1 2 3 ^ ^ ^"}
+V {}
+S {}
+E {}
+L 4 -60 -30 -40 -30 {}
+L 4 -60 -10 -32.1875 -10 {}
+L 4 35 0 60 0 {}
+L 4 -30 -30 -15 -30 {}
+L 4 -30 30 -15 30 {}
+L 4 -60 10 -32.1875 10 {}
+L 4 -60 30 -40 30 {}
+B 5 -62.5 -32.5 -57.5 -27.5 {name=A dir=in goto=4}
+B 5 -62.5 -12.5 -57.5 -7.5 {name=B dir=in goto=4}
+B 5 -62.5 7.5 -57.5 12.5 {name=C dir=in goto=4}
+B 5 -62.5 27.5 -57.5 32.5 {name=D dir=in goto=4}
+B 5 57.5 -2.5 62.5 2.5 {name=X dir=out }
+A 4 -77.5 0 56.18051263561058 327.7243556854224 64.55128862915524 {}
+A 4 -21.07142857142857 36.78571428571428 67.06112046149408 33.26691584358777 51.53865524867743 {}
+A 4 -21.07142857142857 -36.78571428571428 67.06112046149408 275.1944289077348 51.53865524867743 {}
+A 4 -87.5 0 56.18051263561058 327.7243556854224 64.55128862915524 {}
+T {A} -55 -44 0 0 0.2 0.2 {}
+T {B} -55 -24 0 0 0.2 0.2 {}
+T {X} 55 -14 0 1 0.2 0.2 {}
+T {@name} -16.25 -5 0 0 0.2 0.2 {}
+T {@symname} -25 -45 0 0 0.2 0.2 {}
+T {C} -55 -4 0 0 0.2 0.2 {}
+T {D} -55 16 0 0 0.2 0.2 {}