diff --git a/include/eval_cps.h b/include/eval_cps.h
index aa50aa22..2e2e9a12 100644
--- a/include/eval_cps.h
+++ b/include/eval_cps.h
@@ -122,6 +122,10 @@ extern void lbm_pause_eval_with_gc(uint32_t num_free);
  * EVAL_CPS_STATE_PUASED state.
  */
 extern void lbm_step_eval(void);
+/** Perform multiple steps of evaluation.
+ * \param n Number of eval steps to perform.
+ */
+extern void lbm_step_n_eval(uint32_t n);
 /** Resume from being in EVAL_CPS_STATE_PAUSED.
  *
  */
diff --git a/include/heap.h b/include/heap.h
index cfa56447..6e32f3b5 100644
--- a/include/heap.h
+++ b/include/heap.h
@@ -594,6 +594,8 @@ static inline bool lbm_is_match_binder(lbm_value exp) {
           ((lbm_dec_sym(lbm_car(exp)) == SYM_MATCH_ANY) ||
            (lbm_dec_sym(lbm_car(exp)) == SYM_MATCH_I28) ||
            (lbm_dec_sym(lbm_car(exp)) == SYM_MATCH_U28) ||
+           (lbm_dec_sym(lbm_car(exp)) == SYM_MATCH_I32) ||
+           (lbm_dec_sym(lbm_car(exp)) == SYM_MATCH_U32) ||
            (lbm_dec_sym(lbm_car(exp)) == SYM_MATCH_FLOAT) ||
            (lbm_dec_sym(lbm_car(exp)) == SYM_MATCH_CONS)));
 }
diff --git a/include/symrepr.h b/include/symrepr.h
index 47500793..bee0f70d 100644
--- a/include/symrepr.h
+++ b/include/symrepr.h
@@ -70,8 +70,10 @@
 #define SYM_MATCH_ANY      0x2B
 #define SYM_MATCH_I28      0x2C
 #define SYM_MATCH_U28      0x2D
-#define SYM_MATCH_FLOAT    0x2E
-#define SYM_MATCH_CONS     0x2F
+#define SYM_MATCH_U32      0x2E
+#define SYM_MATCH_I32      0x2F
+#define SYM_MATCH_FLOAT    0x30
+#define SYM_MATCH_CONS     0x31
 
 // Type identifying symbols
 #define SYM_TYPE_LIST      0x50
diff --git a/repl-cps/repl.c b/repl-cps/repl.c
index d6089d6a..136d800a 100644
--- a/repl-cps/repl.c
+++ b/repl-cps/repl.c
@@ -491,7 +491,10 @@ int main(int argc, char **argv) {
     } else if (strncmp(str, ":continue", 9) == 0) {
       lbm_continue_eval();
     } else if (strncmp(str, ":step", 5) == 0) {
-      lbm_step_eval();
+
+      int num = atoi(str + 5);
+      
+      lbm_step_n_eval((uint32_t)num);
     } else {
       /* Get exclusive access to the heap */
       lbm_pause_eval();
diff --git a/src/eval_cps.c b/src/eval_cps.c
index b6fb2d8d..af08f3ef 100644
--- a/src/eval_cps.c
+++ b/src/eval_cps.c
@@ -660,6 +660,25 @@ static bool match(lbm_value p, lbm_value e, lbm_value *env, bool *gc) {
         }
       }
       return false;
+    case SYM_MATCH_I32:
+      if (lbm_type_of(e) == LBM_PTR_TYPE_BOXED_I) {
+        if (lbm_dec_sym(var) == SYM_DONTCARE) {
+          return true;
+        } else {
+          break;
+        }
+      }
+      return false;
+    case SYM_MATCH_U32:
+      if (lbm_type_of(e) == LBM_PTR_TYPE_BOXED_U) {
+        if (lbm_dec_sym(var) == SYM_DONTCARE) {
+          return true;
+        } else {
+          break;
+        }
+      }
+      return false;
+
     case SYM_MATCH_FLOAT:
       if (lbm_type_of(e) == LBM_PTR_TYPE_BOXED_F) {
         if (lbm_dec_sym(var) == SYM_DONTCARE) {
@@ -705,6 +724,18 @@ static bool match(lbm_value p, lbm_value e, lbm_value *env, bool *gc) {
       return false;
     }
     return match (lbm_cdr(p), lbm_cdr(e), env, gc);
+  } else if (lbm_type_of(p) == LBM_PTR_TYPE_BOXED_F &&
+             lbm_type_of(e) == LBM_PTR_TYPE_BOXED_F &&
+             lbm_dec_F(p) == lbm_dec_F(e)) {
+    return true;
+  } else if (lbm_type_of(p) == LBM_PTR_TYPE_BOXED_U &&
+             lbm_type_of(e) == LBM_PTR_TYPE_BOXED_U &&
+             lbm_dec_U(p) == lbm_dec_U(e)) {
+    return true;
+  } else if (lbm_type_of(p) == LBM_PTR_TYPE_BOXED_I &&
+      lbm_type_of(e) == LBM_PTR_TYPE_BOXED_I &&
+      lbm_dec_I(p) == lbm_dec_I(e)) {
+    return true;
   } else if (p == e) {
     return true;
   }
@@ -931,9 +962,9 @@ static inline void eval_lambda(eval_context_t *ctx) {
 static inline void eval_if(eval_context_t *ctx) {
 
   CHECK_STACK(lbm_push_u32_3(&ctx->K,
-                         lbm_car(lbm_cdr(lbm_cdr(lbm_cdr(ctx->curr_exp)))), // Else branch
-                         lbm_car(lbm_cdr(lbm_cdr(ctx->curr_exp))),      // Then branch
-                         lbm_enc_u(IF)));
+                             lbm_car(lbm_cdr(lbm_cdr(lbm_cdr(ctx->curr_exp)))), // Else branch
+                             lbm_car(lbm_cdr(lbm_cdr(ctx->curr_exp))),      // Then branch
+                             lbm_enc_u(IF)));
   ctx->curr_exp = lbm_car(lbm_cdr(ctx->curr_exp));
 }
 
@@ -1896,6 +1927,12 @@ void lbm_pause_eval_with_gc(uint32_t num_free) {
 
 
 void lbm_step_eval(void) {
+  eval_cps_next_state_arg = 1;
+  eval_cps_next_state = EVAL_CPS_STATE_STEP;
+}
+
+void lbm_step_n_eval(uint32_t n) {
+  eval_cps_next_state_arg = n;
   eval_cps_next_state = EVAL_CPS_STATE_STEP;
 }
 
@@ -1927,7 +1964,12 @@ void lbm_run_eval(void){
       eval_cps_run_state = EVAL_CPS_STATE_RUNNING;
       break;
     case EVAL_CPS_STATE_STEP:
-      eval_cps_next_state = EVAL_CPS_STATE_PAUSED;
+      if (eval_cps_next_state_arg > 1) {
+        eval_cps_next_state = EVAL_CPS_STATE_STEP;
+        eval_cps_next_state_arg --;
+      } else {
+        eval_cps_next_state = EVAL_CPS_STATE_PAUSED;
+      }
       break;
     case EVAL_CPS_STATE_PAUSED:
       if (eval_cps_run_state != EVAL_CPS_STATE_PAUSED) {
diff --git a/src/symrepr.c b/src/symrepr.c
index 015c139c..77d7d8fe 100644
--- a/src/symrepr.c
+++ b/src/symrepr.c
@@ -24,7 +24,7 @@
 
 #include "symrepr.h"
 
-#define NUM_SPECIAL_SYMBOLS 92
+#define NUM_SPECIAL_SYMBOLS 94
 
 #define NAME   0
 #define ID     1
@@ -56,6 +56,8 @@ special_sym const special_symbols[NUM_SPECIAL_SYMBOLS] =  {
   {"?"          , SYM_MATCH_ANY},
   {"?i28"       , SYM_MATCH_I28},
   {"?u28"       , SYM_MATCH_U28},
+  {"?u32"       , SYM_MATCH_U32},
+  {"?i32"       , SYM_MATCH_I32},
   {"?float"     , SYM_MATCH_FLOAT},
   {"?cons"      , SYM_MATCH_CONS},
 
diff --git a/src/tokpar.c b/src/tokpar.c
index 42647445..9ac63694 100644
--- a/src/tokpar.c
+++ b/src/tokpar.c
@@ -52,8 +52,10 @@
 #define TOKMATCHANY     17u
 #define TOKMATCHI28     18u
 #define TOKMATCHU28     19u
-#define TOKMATCHFLOAT   20u
-#define TOKMATCHCONS    21u
+#define TOKMATCHU32     20u
+#define TOKMATCHI32     21u
+#define TOKMATCHFLOAT   22u
+#define TOKMATCHCONS    23u
 
 #define TOKENIZER_ERROR 1024u
 #define TOKENIZER_END   2048u
@@ -86,7 +88,7 @@ typedef struct {
   uint32_t len;
 } matcher;
 
-#define NUM_FIXED_SIZE_TOKENS 13
+#define NUM_FIXED_SIZE_TOKENS 15
 const matcher match_table[NUM_FIXED_SIZE_TOKENS] = {
   {"(", TOKOPENPAR, 1},
   {")", TOKCLOSEPAR, 1},
@@ -98,6 +100,8 @@ const matcher match_table[NUM_FIXED_SIZE_TOKENS] = {
   {",", TOKCOMMA, 1},
   {"?i28", TOKMATCHI28, 4},
   {"?u28", TOKMATCHU28, 4},
+  {"?u32", TOKMATCHU32, 4},
+  {"?i32", TOKMATCHI32, 4},
   {"?float", TOKMATCHFLOAT, 6},
   {"?cons", TOKMATCHCONS, 5},
   {"?", TOKMATCHANY, 1}
@@ -511,6 +515,12 @@ lbm_value lbm_get_next_token(lbm_tokenizer_char_stream_t *str) {
     case TOKMATCHU28:
       res = lbm_enc_sym(SYM_MATCH_U28);
       break;
+    case TOKMATCHI32:
+      res = lbm_enc_sym(SYM_MATCH_I32);
+      break;
+    case TOKMATCHU32:
+      res = lbm_enc_sym(SYM_MATCH_U32);
+      break;
     case TOKMATCHFLOAT:
       res = lbm_enc_sym(SYM_MATCH_FLOAT);
       break;