1 files changed, 30 insertions, 0 deletions
diff --git a/unix/boot/spp/rpp/rpprat/doarth.r b/unix/boot/spp/rpp/rpprat/doarth.r
new file mode 100644
index 00000000..2fe633d5
--- /dev/null
+++ b/unix/boot/spp/rpp/rpprat/doarth.r
@@ -0,0 +1,30 @@
+#-h-  doarth			  636  local   12/01/80  15:53:48
+# doarth - do arithmetic operation
+   include  defs
+
+   subroutine doarth (argstk, i, j)
+   integer argstk (ARGSIZE), i, j
+
+   include COMMON_BLOCKS
+
+   integer k, l
+   integer ctoi
+
+   character op
+
+   k = argstk (i + 2)
+   l = argstk (i + 4)
+   op = evalst (argstk (i + 3))
+   if (op == PLUS)
+      call pbnum (ctoi (evalst, k) + ctoi (evalst, l))
+   else if (op == MINUS)
+      call pbnum (ctoi (evalst, k) - ctoi (evalst, l))
+   else if (op ==  STAR )
+      call pbnum (ctoi (evalst, k) * ctoi (evalst, l))
+   else if (op ==  SLASH )
+      call pbnum (ctoi (evalst, k) / ctoi (evalst, l))
+   else
+      call remark ('arith error')
+
+   return
+   end