diff --git a/lib/cljnim_runtime.nim b/lib/cljnim_runtime.nim
index e5803ab..9b91a26 100644
--- a/lib/cljnim_runtime.nim
+++ b/lib/cljnim_runtime.nim
@@ -1,6 +1,6 @@
 import cljnim_pvec
 import cljnim_pmap
-import strutils, sequtils, hashes, algorithm, os, osproc, locks, math
+import strutils, sequtils, hashes, algorithm, os, osproc, locks, math, random
 
 type
   CljKind* = enum
@@ -890,6 +890,95 @@ proc cljAset*(args: seq[CljVal]): CljVal =
 proc cljVectorFn*(args: seq[CljVal]): CljVal =
   cljVector(args)
 
+proc cljCompare*(args: seq[CljVal]): CljVal =
+  if args.len < 2: return cljInt(0)
+  let a = args[0]; let b = args[1]
+  if a.isNil and b.isNil: return cljInt(0)
+  if a.isNil: return cljInt(-1)
+  if b.isNil: return cljInt(1)
+  case a.kind
+  of ckInt:
+    if b.kind == ckInt:
+      if a.intVal < b.intVal: return cljInt(-1)
+      elif a.intVal > b.intVal: return cljInt(1)
+      else: return cljInt(0)
+    elif b.kind == ckFloat:
+      if a.intVal.float < b.floatVal: return cljInt(-1)
+      elif a.intVal.float > b.floatVal: return cljInt(1)
+      else: return cljInt(0)
+  of ckFloat:
+    if b.kind == ckFloat:
+      if a.floatVal < b.floatVal: return cljInt(-1)
+      elif a.floatVal > b.floatVal: return cljInt(1)
+      else: return cljInt(0)
+    elif b.kind == ckInt:
+      if a.floatVal < b.intVal.float: return cljInt(-1)
+      elif a.floatVal > b.intVal.float: return cljInt(1)
+      else: return cljInt(0)
+  of ckString:
+    if b.kind == ckString:
+      if a.strVal < b.strVal: return cljInt(-1)
+      elif a.strVal > b.strVal: return cljInt(1)
+      else: return cljInt(0)
+  of ckKeyword:
+    if b.kind == ckKeyword:
+      if a.kwName < b.kwName: return cljInt(-1)
+      elif a.kwName > b.kwName: return cljInt(1)
+      else: return cljInt(0)
+  else: discard
+  cljInt(0)
+
+proc cljSubvec*(args: seq[CljVal]): CljVal =
+  if args.len < 2: return cljVector(@[])
+  let v = args[0]
+  let start = args[1].intVal.int
+  let stop = if args.len >= 3: args[2].intVal.int else: (if v.kind == ckVector: v.vecData.count else: 0)
+  if v.kind != ckVector: return cljVector(@[])
+  var items: seq[CljVal] = @[]
+  for i in start..<min(stop, v.vecData.count):
+    items.add(v.vecData[i])
+  cljVector(items)
+
+proc cljRand*(args: seq[CljVal]): CljVal =
+  if args.len == 0: return cljFloat(rand(1.0))
+  let n = args[0]
+  case n.kind
+  of ckInt: return cljInt(rand(n.intVal.int).int64)
+  of ckFloat: return cljFloat(rand(n.floatVal))
+  else: return cljFloat(rand(1.0))
+
+proc cljRandInt*(args: seq[CljVal]): CljVal =
+  if args.len == 0: return cljInt(0)
+  let n = args[0].intVal.int
+  if n <= 0: return cljInt(0)
+  cljInt(rand(n).int64)
+
+proc cljRandNth*(args: seq[CljVal]): CljVal =
+  if args.len == 0: return cljNil()
+  let coll = args[0]
+  case coll.kind
+  of ckVector:
+    if coll.vecData.count == 0: return cljNil()
+    return coll.vecData[rand(coll.vecData.count)]
+  of ckList:
+    let items = coll.listItems
+    if items.len == 0: return cljNil()
+    return items[rand(items.len)]
+  else: return cljNil()
+
+proc cljRandomSample*(args: seq[CljVal]): CljVal =
+  if args.len < 2: return cljList(@[])
+  let coll = args[1]
+  var items: seq[CljVal] = @[]
+  let collItems = case coll.kind
+  of ckList: coll.listItems
+  of ckVector: toSeq(coll.vecData)
+  else: @[]
+  for item in collItems:
+    if rand(1.0) < 0.5:
+      items.add(item)
+  cljList(items)
+
 proc cljTake*(n: int, coll: CljVal): CljVal =
   if coll.isNil: return cljList(@[])
   case coll.kind
diff --git a/src/emitter.nim b/src/emitter.nim
index ccb788f..bed77cd 100644
--- a/src/emitter.nim
+++ b/src/emitter.nim
@@ -272,6 +272,12 @@ proc runtimeName(op: string): string =
   of "binding": "cljBinding"
   of "aset": "cljAset"
   of "vector": "cljVectorFn"
+  of "compare": "cljCompare"
+  of "subvec": "cljSubvec"
+  of "rand": "cljRand"
+  of "rand-int": "cljRandInt"
+  of "rand-nth": "cljRandNth"
+  of "random-sample": "cljRandomSample"
   # ---- Type conversion ----
   of "float": "cljToFloat"
   of "int": "cljToInt"
@@ -1219,7 +1225,12 @@ proc emitSpecialForm(items: seq[CljVal], indent: int): string =
                             "zipmap", "hash-map", "hash-set", "sorted-map", "sorted-set",
                             "array-map", "inf", "nan",
                             "float", "int", "double", "long", "short", "byte",
-                            "boolean", "num", "number"]
+                            "boolean", "num", "number",
+                            "drop-last", "shuffle", "repeatedly", "fnil", "intern",
+                            "println-str", "prn-str", "binding", "aset",
+                            "volatile!", "deliver", "doall", "dorun",
+                            "to-array", "vector", "rand", "rand-int",
+                            "rand-nth", "random-sample"]
       var call: string
       if variadic:
         call = rn & "(@[" & argParts.join(", ") & "])"