Merge remote-tracking branch 'origin/stable-2.0'
[bpt/guile.git] / libguile / numbers.c
index 3458847..63a6501 100644 (file)
@@ -183,7 +183,7 @@ finalize_bignum (void *ptr, void *data)
 {
   SCM bignum;
 
-  bignum = PTR2SCM (ptr);
+  bignum = SCM_PACK_POINTER (ptr);
   mpz_clear (SCM_I_BIG_MPZ (bignum));
 }
 
@@ -558,7 +558,7 @@ SCM_PRIMITIVE_GENERIC (scm_exact_p, "exact?", 1, 0, 0,
   else if (SCM_NUMBERP (x))
     return SCM_BOOL_T;
   else
-    SCM_WTA_DISPATCH_1 (g_scm_exact_p, x, 1, s_scm_exact_p);
+    return scm_wta_dispatch_1 (g_scm_exact_p, x, 1, s_scm_exact_p);
 }
 #undef FUNC_NAME
 
@@ -579,7 +579,7 @@ SCM_PRIMITIVE_GENERIC (scm_inexact_p, "inexact?", 1, 0, 0,
   else if (SCM_NUMBERP (x))
     return SCM_BOOL_F;
   else
-    SCM_WTA_DISPATCH_1 (g_scm_inexact_p, x, 1, s_scm_inexact_p);
+    return scm_wta_dispatch_1 (g_scm_inexact_p, x, 1, s_scm_inexact_p);
 }
 #undef FUNC_NAME
 
@@ -618,7 +618,7 @@ SCM_PRIMITIVE_GENERIC (scm_odd_p, "odd?", 1, 0, 0,
            return SCM_BOOL_F;
        }
     }
-  SCM_WTA_DISPATCH_1 (g_scm_odd_p, n, 1, s_scm_odd_p);
+  return scm_wta_dispatch_1 (g_scm_odd_p, n, 1, s_scm_odd_p);
 }
 #undef FUNC_NAME
 
@@ -652,7 +652,7 @@ SCM_PRIMITIVE_GENERIC (scm_even_p, "even?", 1, 0, 0,
            return SCM_BOOL_T;
        }
     }
-  SCM_WTA_DISPATCH_1 (g_scm_even_p, n, 1, s_scm_even_p);
+  return scm_wta_dispatch_1 (g_scm_even_p, n, 1, s_scm_even_p);
 }
 #undef FUNC_NAME
 
@@ -667,7 +667,7 @@ SCM_PRIMITIVE_GENERIC (scm_finite_p, "finite?", 1, 0, 0,
   else if (scm_is_real (x))
     return SCM_BOOL_T;
   else
-    SCM_WTA_DISPATCH_1 (g_scm_finite_p, x, 1, s_scm_finite_p);
+    return scm_wta_dispatch_1 (g_scm_finite_p, x, 1, s_scm_finite_p);
 }
 #undef FUNC_NAME
 
@@ -682,7 +682,7 @@ SCM_PRIMITIVE_GENERIC (scm_inf_p, "inf?", 1, 0, 0,
   else if (scm_is_real (x))
     return SCM_BOOL_F;
   else
-    SCM_WTA_DISPATCH_1 (g_scm_inf_p, x, 1, s_scm_inf_p);
+    return scm_wta_dispatch_1 (g_scm_inf_p, x, 1, s_scm_inf_p);
 }
 #undef FUNC_NAME
 
@@ -697,7 +697,7 @@ SCM_PRIMITIVE_GENERIC (scm_nan_p, "nan?", 1, 0, 0,
   else if (scm_is_real (x))
     return SCM_BOOL_F;
   else
-    SCM_WTA_DISPATCH_1 (g_scm_nan_p, x, 1, s_scm_nan_p);
+    return scm_wta_dispatch_1 (g_scm_nan_p, x, 1, s_scm_nan_p);
 }
 #undef FUNC_NAME
 
@@ -824,7 +824,7 @@ SCM_PRIMITIVE_GENERIC (scm_abs, "abs", 1, 0, 0,
                             SCM_FRACTION_DENOMINATOR (x));
     }
   else
-    SCM_WTA_DISPATCH_1 (g_scm_abs, x, 1, s_scm_abs);
+    return scm_wta_dispatch_1 (g_scm_abs, x, 1, s_scm_abs);
 }
 #undef FUNC_NAME
 
@@ -839,10 +839,10 @@ SCM_PRIMITIVE_GENERIC (scm_quotient, "quotient", 2, 0, 0,
       if (SCM_LIKELY (scm_is_integer (y)))
        return scm_truncate_quotient (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_quotient, x, y, SCM_ARG2, s_scm_quotient);
+       return scm_wta_dispatch_2 (g_scm_quotient, x, y, SCM_ARG2, s_scm_quotient);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_scm_quotient, x, y, SCM_ARG1, s_scm_quotient);
+    return scm_wta_dispatch_2 (g_scm_quotient, x, y, SCM_ARG1, s_scm_quotient);
 }
 #undef FUNC_NAME
 
@@ -860,10 +860,10 @@ SCM_PRIMITIVE_GENERIC (scm_remainder, "remainder", 2, 0, 0,
       if (SCM_LIKELY (scm_is_integer (y)))
        return scm_truncate_remainder (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_remainder, x, y, SCM_ARG2, s_scm_remainder);
+       return scm_wta_dispatch_2 (g_scm_remainder, x, y, SCM_ARG2, s_scm_remainder);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_scm_remainder, x, y, SCM_ARG1, s_scm_remainder);
+    return scm_wta_dispatch_2 (g_scm_remainder, x, y, SCM_ARG1, s_scm_remainder);
 }
 #undef FUNC_NAME
 
@@ -882,10 +882,10 @@ SCM_PRIMITIVE_GENERIC (scm_modulo, "modulo", 2, 0, 0,
       if (SCM_LIKELY (scm_is_integer (y)))
        return scm_floor_remainder (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_modulo, x, y, SCM_ARG2, s_scm_modulo);
+       return scm_wta_dispatch_2 (g_scm_modulo, x, y, SCM_ARG2, s_scm_modulo);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_scm_modulo, x, y, SCM_ARG1, s_scm_modulo);
+    return scm_wta_dispatch_2 (g_scm_modulo, x, y, SCM_ARG1, s_scm_modulo);
 }
 #undef FUNC_NAME
 
@@ -906,10 +906,9 @@ static void
 two_valued_wta_dispatch_2 (SCM gf, SCM a1, SCM a2, int pos,
                           const char *subr, SCM *rp1, SCM *rp2)
 {
-  if (SCM_UNPACK (gf))
-    scm_i_extract_values_2 (scm_call_generic_2 (gf, a1, a2), rp1, rp2);
-  else
-    scm_wrong_type_arg (subr, pos, (pos == SCM_ARG1) ? a1 : a2);
+  SCM vals = scm_wta_dispatch_2 (gf, a1, a2, pos, subr);
+  
+  scm_i_extract_values_2 (vals, rp1, rp2);
 }
 
 SCM_DEFINE (scm_euclidean_quotient, "euclidean-quotient", 2, 0, 0,
@@ -1041,8 +1040,8 @@ SCM_PRIMITIVE_GENERIC (scm_floor_quotient, "floor-quotient", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_floor_quotient (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_floor_quotient, x, y, SCM_ARG2,
-                           s_scm_floor_quotient);
+       return scm_wta_dispatch_2 (g_scm_floor_quotient, x, y, SCM_ARG2,
+                                   s_scm_floor_quotient);
     }
   else if (SCM_BIGP (x))
     {
@@ -1082,8 +1081,8 @@ SCM_PRIMITIVE_GENERIC (scm_floor_quotient, "floor-quotient", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_floor_quotient (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_floor_quotient, x, y, SCM_ARG2,
-                           s_scm_floor_quotient);
+       return scm_wta_dispatch_2 (g_scm_floor_quotient, x, y, SCM_ARG2,
+                                   s_scm_floor_quotient);
     }
   else if (SCM_REALP (x))
     {
@@ -1092,8 +1091,8 @@ SCM_PRIMITIVE_GENERIC (scm_floor_quotient, "floor-quotient", 2, 0, 0,
        return scm_i_inexact_floor_quotient
          (SCM_REAL_VALUE (x), scm_to_double (y));
       else
-       SCM_WTA_DISPATCH_2 (g_scm_floor_quotient, x, y, SCM_ARG2,
-                           s_scm_floor_quotient);
+       return scm_wta_dispatch_2 (g_scm_floor_quotient, x, y, SCM_ARG2,
+                                   s_scm_floor_quotient);
     }
   else if (SCM_FRACTIONP (x))
     {
@@ -1103,12 +1102,12 @@ SCM_PRIMITIVE_GENERIC (scm_floor_quotient, "floor-quotient", 2, 0, 0,
       else if (SCM_I_INUMP (y) || SCM_BIGP (y) || SCM_FRACTIONP (y))
        return scm_i_exact_rational_floor_quotient (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_floor_quotient, x, y, SCM_ARG2,
-                           s_scm_floor_quotient);
+       return scm_wta_dispatch_2 (g_scm_floor_quotient, x, y, SCM_ARG2,
+                                   s_scm_floor_quotient);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_scm_floor_quotient, x, y, SCM_ARG1,
-                       s_scm_floor_quotient);
+    return scm_wta_dispatch_2 (g_scm_floor_quotient, x, y, SCM_ARG1,
+                               s_scm_floor_quotient);
 }
 #undef FUNC_NAME
 
@@ -1201,8 +1200,8 @@ SCM_PRIMITIVE_GENERIC (scm_floor_remainder, "floor-remainder", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_floor_remainder (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_floor_remainder, x, y, SCM_ARG2,
-                           s_scm_floor_remainder);
+       return scm_wta_dispatch_2 (g_scm_floor_remainder, x, y, SCM_ARG2,
+                                   s_scm_floor_remainder);
     }
   else if (SCM_BIGP (x))
     {
@@ -1237,8 +1236,8 @@ SCM_PRIMITIVE_GENERIC (scm_floor_remainder, "floor-remainder", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_floor_remainder (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_floor_remainder, x, y, SCM_ARG2,
-                           s_scm_floor_remainder);
+       return scm_wta_dispatch_2 (g_scm_floor_remainder, x, y, SCM_ARG2,
+                                   s_scm_floor_remainder);
     }
   else if (SCM_REALP (x))
     {
@@ -1247,8 +1246,8 @@ SCM_PRIMITIVE_GENERIC (scm_floor_remainder, "floor-remainder", 2, 0, 0,
        return scm_i_inexact_floor_remainder
          (SCM_REAL_VALUE (x), scm_to_double (y));
       else
-       SCM_WTA_DISPATCH_2 (g_scm_floor_remainder, x, y, SCM_ARG2,
-                           s_scm_floor_remainder);
+       return scm_wta_dispatch_2 (g_scm_floor_remainder, x, y, SCM_ARG2,
+                                   s_scm_floor_remainder);
     }
   else if (SCM_FRACTIONP (x))
     {
@@ -1258,12 +1257,12 @@ SCM_PRIMITIVE_GENERIC (scm_floor_remainder, "floor-remainder", 2, 0, 0,
       else if (SCM_I_INUMP (y) || SCM_BIGP (y) || SCM_FRACTIONP (y))
        return scm_i_exact_rational_floor_remainder (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_floor_remainder, x, y, SCM_ARG2,
-                           s_scm_floor_remainder);
+       return scm_wta_dispatch_2 (g_scm_floor_remainder, x, y, SCM_ARG2,
+                                   s_scm_floor_remainder);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_scm_floor_remainder, x, y, SCM_ARG1,
-                       s_scm_floor_remainder);
+    return scm_wta_dispatch_2 (g_scm_floor_remainder, x, y, SCM_ARG1,
+                               s_scm_floor_remainder);
 }
 #undef FUNC_NAME
 
@@ -1574,8 +1573,8 @@ SCM_PRIMITIVE_GENERIC (scm_ceiling_quotient, "ceiling-quotient", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_ceiling_quotient (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_ceiling_quotient, x, y, SCM_ARG2,
-                           s_scm_ceiling_quotient);
+       return scm_wta_dispatch_2 (g_scm_ceiling_quotient, x, y, SCM_ARG2,
+                                   s_scm_ceiling_quotient);
     }
   else if (SCM_BIGP (x))
     {
@@ -1615,8 +1614,8 @@ SCM_PRIMITIVE_GENERIC (scm_ceiling_quotient, "ceiling-quotient", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_ceiling_quotient (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_ceiling_quotient, x, y, SCM_ARG2,
-                           s_scm_ceiling_quotient);
+       return scm_wta_dispatch_2 (g_scm_ceiling_quotient, x, y, SCM_ARG2,
+                                   s_scm_ceiling_quotient);
     }
   else if (SCM_REALP (x))
     {
@@ -1625,8 +1624,8 @@ SCM_PRIMITIVE_GENERIC (scm_ceiling_quotient, "ceiling-quotient", 2, 0, 0,
        return scm_i_inexact_ceiling_quotient
          (SCM_REAL_VALUE (x), scm_to_double (y));
       else
-       SCM_WTA_DISPATCH_2 (g_scm_ceiling_quotient, x, y, SCM_ARG2,
-                           s_scm_ceiling_quotient);
+       return scm_wta_dispatch_2 (g_scm_ceiling_quotient, x, y, SCM_ARG2,
+                                   s_scm_ceiling_quotient);
     }
   else if (SCM_FRACTIONP (x))
     {
@@ -1636,12 +1635,12 @@ SCM_PRIMITIVE_GENERIC (scm_ceiling_quotient, "ceiling-quotient", 2, 0, 0,
       else if (SCM_I_INUMP (y) || SCM_BIGP (y) || SCM_FRACTIONP (y))
        return scm_i_exact_rational_ceiling_quotient (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_ceiling_quotient, x, y, SCM_ARG2,
-                           s_scm_ceiling_quotient);
+       return scm_wta_dispatch_2 (g_scm_ceiling_quotient, x, y, SCM_ARG2,
+                                   s_scm_ceiling_quotient);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_scm_ceiling_quotient, x, y, SCM_ARG1,
-                       s_scm_ceiling_quotient);
+    return scm_wta_dispatch_2 (g_scm_ceiling_quotient, x, y, SCM_ARG1,
+                               s_scm_ceiling_quotient);
 }
 #undef FUNC_NAME
 
@@ -1744,8 +1743,8 @@ SCM_PRIMITIVE_GENERIC (scm_ceiling_remainder, "ceiling-remainder", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_ceiling_remainder (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_ceiling_remainder, x, y, SCM_ARG2,
-                           s_scm_ceiling_remainder);
+       return scm_wta_dispatch_2 (g_scm_ceiling_remainder, x, y, SCM_ARG2,
+                                   s_scm_ceiling_remainder);
     }
   else if (SCM_BIGP (x))
     {
@@ -1780,8 +1779,8 @@ SCM_PRIMITIVE_GENERIC (scm_ceiling_remainder, "ceiling-remainder", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_ceiling_remainder (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_ceiling_remainder, x, y, SCM_ARG2,
-                           s_scm_ceiling_remainder);
+       return scm_wta_dispatch_2 (g_scm_ceiling_remainder, x, y, SCM_ARG2,
+                                   s_scm_ceiling_remainder);
     }
   else if (SCM_REALP (x))
     {
@@ -1790,8 +1789,8 @@ SCM_PRIMITIVE_GENERIC (scm_ceiling_remainder, "ceiling-remainder", 2, 0, 0,
        return scm_i_inexact_ceiling_remainder
          (SCM_REAL_VALUE (x), scm_to_double (y));
       else
-       SCM_WTA_DISPATCH_2 (g_scm_ceiling_remainder, x, y, SCM_ARG2,
-                           s_scm_ceiling_remainder);
+       return scm_wta_dispatch_2 (g_scm_ceiling_remainder, x, y, SCM_ARG2,
+                                   s_scm_ceiling_remainder);
     }
   else if (SCM_FRACTIONP (x))
     {
@@ -1801,12 +1800,12 @@ SCM_PRIMITIVE_GENERIC (scm_ceiling_remainder, "ceiling-remainder", 2, 0, 0,
       else if (SCM_I_INUMP (y) || SCM_BIGP (y) || SCM_FRACTIONP (y))
        return scm_i_exact_rational_ceiling_remainder (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_ceiling_remainder, x, y, SCM_ARG2,
-                           s_scm_ceiling_remainder);
+       return scm_wta_dispatch_2 (g_scm_ceiling_remainder, x, y, SCM_ARG2,
+                                   s_scm_ceiling_remainder);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_scm_ceiling_remainder, x, y, SCM_ARG1,
-                       s_scm_ceiling_remainder);
+    return scm_wta_dispatch_2 (g_scm_ceiling_remainder, x, y, SCM_ARG1,
+                               s_scm_ceiling_remainder);
 }
 #undef FUNC_NAME
 
@@ -2106,8 +2105,8 @@ SCM_PRIMITIVE_GENERIC (scm_truncate_quotient, "truncate-quotient", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_truncate_quotient (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_truncate_quotient, x, y, SCM_ARG2,
-                           s_scm_truncate_quotient);
+       return scm_wta_dispatch_2 (g_scm_truncate_quotient, x, y, SCM_ARG2,
+                                   s_scm_truncate_quotient);
     }
   else if (SCM_BIGP (x))
     {
@@ -2147,8 +2146,8 @@ SCM_PRIMITIVE_GENERIC (scm_truncate_quotient, "truncate-quotient", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_truncate_quotient (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_truncate_quotient, x, y, SCM_ARG2,
-                           s_scm_truncate_quotient);
+       return scm_wta_dispatch_2 (g_scm_truncate_quotient, x, y, SCM_ARG2,
+                                   s_scm_truncate_quotient);
     }
   else if (SCM_REALP (x))
     {
@@ -2157,8 +2156,8 @@ SCM_PRIMITIVE_GENERIC (scm_truncate_quotient, "truncate-quotient", 2, 0, 0,
        return scm_i_inexact_truncate_quotient
          (SCM_REAL_VALUE (x), scm_to_double (y));
       else
-       SCM_WTA_DISPATCH_2 (g_scm_truncate_quotient, x, y, SCM_ARG2,
-                           s_scm_truncate_quotient);
+       return scm_wta_dispatch_2 (g_scm_truncate_quotient, x, y, SCM_ARG2,
+                                   s_scm_truncate_quotient);
     }
   else if (SCM_FRACTIONP (x))
     {
@@ -2168,12 +2167,12 @@ SCM_PRIMITIVE_GENERIC (scm_truncate_quotient, "truncate-quotient", 2, 0, 0,
       else if (SCM_I_INUMP (y) || SCM_BIGP (y) || SCM_FRACTIONP (y))
        return scm_i_exact_rational_truncate_quotient (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_truncate_quotient, x, y, SCM_ARG2,
-                           s_scm_truncate_quotient);
+       return scm_wta_dispatch_2 (g_scm_truncate_quotient, x, y, SCM_ARG2,
+                                   s_scm_truncate_quotient);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_scm_truncate_quotient, x, y, SCM_ARG1,
-                       s_scm_truncate_quotient);
+    return scm_wta_dispatch_2 (g_scm_truncate_quotient, x, y, SCM_ARG1,
+                               s_scm_truncate_quotient);
 }
 #undef FUNC_NAME
 
@@ -2241,8 +2240,8 @@ SCM_PRIMITIVE_GENERIC (scm_truncate_remainder, "truncate-remainder", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_truncate_remainder (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_truncate_remainder, x, y, SCM_ARG2,
-                           s_scm_truncate_remainder);
+       return scm_wta_dispatch_2 (g_scm_truncate_remainder, x, y, SCM_ARG2,
+                                   s_scm_truncate_remainder);
     }
   else if (SCM_BIGP (x))
     {
@@ -2275,8 +2274,8 @@ SCM_PRIMITIVE_GENERIC (scm_truncate_remainder, "truncate-remainder", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_truncate_remainder (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_truncate_remainder, x, y, SCM_ARG2,
-                           s_scm_truncate_remainder);
+       return scm_wta_dispatch_2 (g_scm_truncate_remainder, x, y, SCM_ARG2,
+                                   s_scm_truncate_remainder);
     }
   else if (SCM_REALP (x))
     {
@@ -2285,8 +2284,8 @@ SCM_PRIMITIVE_GENERIC (scm_truncate_remainder, "truncate-remainder", 2, 0, 0,
        return scm_i_inexact_truncate_remainder
          (SCM_REAL_VALUE (x), scm_to_double (y));
       else
-       SCM_WTA_DISPATCH_2 (g_scm_truncate_remainder, x, y, SCM_ARG2,
-                           s_scm_truncate_remainder);
+       return scm_wta_dispatch_2 (g_scm_truncate_remainder, x, y, SCM_ARG2,
+                                   s_scm_truncate_remainder);
     }
   else if (SCM_FRACTIONP (x))
     {
@@ -2296,12 +2295,12 @@ SCM_PRIMITIVE_GENERIC (scm_truncate_remainder, "truncate-remainder", 2, 0, 0,
       else if (SCM_I_INUMP (y) || SCM_BIGP (y) || SCM_FRACTIONP (y))
        return scm_i_exact_rational_truncate_remainder (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_truncate_remainder, x, y, SCM_ARG2,
-                           s_scm_truncate_remainder);
+       return scm_wta_dispatch_2 (g_scm_truncate_remainder, x, y, SCM_ARG2,
+                                   s_scm_truncate_remainder);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_scm_truncate_remainder, x, y, SCM_ARG1,
-                       s_scm_truncate_remainder);
+    return scm_wta_dispatch_2 (g_scm_truncate_remainder, x, y, SCM_ARG1,
+                               s_scm_truncate_remainder);
 }
 #undef FUNC_NAME
 
@@ -2588,8 +2587,8 @@ SCM_PRIMITIVE_GENERIC (scm_centered_quotient, "centered-quotient", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_centered_quotient (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_centered_quotient, x, y, SCM_ARG2,
-                           s_scm_centered_quotient);
+       return scm_wta_dispatch_2 (g_scm_centered_quotient, x, y, SCM_ARG2,
+                                   s_scm_centered_quotient);
     }
   else if (SCM_BIGP (x))
     {
@@ -2637,8 +2636,8 @@ SCM_PRIMITIVE_GENERIC (scm_centered_quotient, "centered-quotient", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_centered_quotient (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_centered_quotient, x, y, SCM_ARG2,
-                           s_scm_centered_quotient);
+       return scm_wta_dispatch_2 (g_scm_centered_quotient, x, y, SCM_ARG2,
+                                   s_scm_centered_quotient);
     }
   else if (SCM_REALP (x))
     {
@@ -2647,8 +2646,8 @@ SCM_PRIMITIVE_GENERIC (scm_centered_quotient, "centered-quotient", 2, 0, 0,
        return scm_i_inexact_centered_quotient
          (SCM_REAL_VALUE (x), scm_to_double (y));
       else
-       SCM_WTA_DISPATCH_2 (g_scm_centered_quotient, x, y, SCM_ARG2,
-                           s_scm_centered_quotient);
+       return scm_wta_dispatch_2 (g_scm_centered_quotient, x, y, SCM_ARG2,
+                                   s_scm_centered_quotient);
     }
   else if (SCM_FRACTIONP (x))
     {
@@ -2658,12 +2657,12 @@ SCM_PRIMITIVE_GENERIC (scm_centered_quotient, "centered-quotient", 2, 0, 0,
       else if (SCM_I_INUMP (y) || SCM_BIGP (y) || SCM_FRACTIONP (y))
        return scm_i_exact_rational_centered_quotient (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_centered_quotient, x, y, SCM_ARG2,
-                           s_scm_centered_quotient);
+       return scm_wta_dispatch_2 (g_scm_centered_quotient, x, y, SCM_ARG2,
+                                   s_scm_centered_quotient);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_scm_centered_quotient, x, y, SCM_ARG1,
-                       s_scm_centered_quotient);
+    return scm_wta_dispatch_2 (g_scm_centered_quotient, x, y, SCM_ARG1,
+                               s_scm_centered_quotient);
 }
 #undef FUNC_NAME
 
@@ -2802,8 +2801,8 @@ SCM_PRIMITIVE_GENERIC (scm_centered_remainder, "centered-remainder", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_centered_remainder (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_centered_remainder, x, y, SCM_ARG2,
-                           s_scm_centered_remainder);
+       return scm_wta_dispatch_2 (g_scm_centered_remainder, x, y, SCM_ARG2,
+                                   s_scm_centered_remainder);
     }
   else if (SCM_BIGP (x))
     {
@@ -2843,8 +2842,8 @@ SCM_PRIMITIVE_GENERIC (scm_centered_remainder, "centered-remainder", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_centered_remainder (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_centered_remainder, x, y, SCM_ARG2,
-                           s_scm_centered_remainder);
+       return scm_wta_dispatch_2 (g_scm_centered_remainder, x, y, SCM_ARG2,
+                                   s_scm_centered_remainder);
     }
   else if (SCM_REALP (x))
     {
@@ -2853,8 +2852,8 @@ SCM_PRIMITIVE_GENERIC (scm_centered_remainder, "centered-remainder", 2, 0, 0,
        return scm_i_inexact_centered_remainder
          (SCM_REAL_VALUE (x), scm_to_double (y));
       else
-       SCM_WTA_DISPATCH_2 (g_scm_centered_remainder, x, y, SCM_ARG2,
-                           s_scm_centered_remainder);
+       return scm_wta_dispatch_2 (g_scm_centered_remainder, x, y, SCM_ARG2,
+                                   s_scm_centered_remainder);
     }
   else if (SCM_FRACTIONP (x))
     {
@@ -2864,12 +2863,12 @@ SCM_PRIMITIVE_GENERIC (scm_centered_remainder, "centered-remainder", 2, 0, 0,
       else if (SCM_I_INUMP (y) || SCM_BIGP (y) || SCM_FRACTIONP (y))
        return scm_i_exact_rational_centered_remainder (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_centered_remainder, x, y, SCM_ARG2,
-                           s_scm_centered_remainder);
+       return scm_wta_dispatch_2 (g_scm_centered_remainder, x, y, SCM_ARG2,
+                                   s_scm_centered_remainder);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_scm_centered_remainder, x, y, SCM_ARG1,
-                       s_scm_centered_remainder);
+    return scm_wta_dispatch_2 (g_scm_centered_remainder, x, y, SCM_ARG1,
+                               s_scm_centered_remainder);
 }
 #undef FUNC_NAME
 
@@ -3284,8 +3283,8 @@ SCM_PRIMITIVE_GENERIC (scm_round_quotient, "round-quotient", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_round_quotient (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_round_quotient, x, y, SCM_ARG2,
-                           s_scm_round_quotient);
+       return scm_wta_dispatch_2 (g_scm_round_quotient, x, y, SCM_ARG2,
+                                   s_scm_round_quotient);
     }
   else if (SCM_BIGP (x))
     {
@@ -3335,8 +3334,8 @@ SCM_PRIMITIVE_GENERIC (scm_round_quotient, "round-quotient", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_round_quotient (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_round_quotient, x, y, SCM_ARG2,
-                           s_scm_round_quotient);
+       return scm_wta_dispatch_2 (g_scm_round_quotient, x, y, SCM_ARG2,
+                                   s_scm_round_quotient);
     }
   else if (SCM_REALP (x))
     {
@@ -3345,8 +3344,8 @@ SCM_PRIMITIVE_GENERIC (scm_round_quotient, "round-quotient", 2, 0, 0,
        return scm_i_inexact_round_quotient
          (SCM_REAL_VALUE (x), scm_to_double (y));
       else
-       SCM_WTA_DISPATCH_2 (g_scm_round_quotient, x, y, SCM_ARG2,
-                           s_scm_round_quotient);
+       return scm_wta_dispatch_2 (g_scm_round_quotient, x, y, SCM_ARG2,
+                                   s_scm_round_quotient);
     }
   else if (SCM_FRACTIONP (x))
     {
@@ -3356,12 +3355,12 @@ SCM_PRIMITIVE_GENERIC (scm_round_quotient, "round-quotient", 2, 0, 0,
       else if (SCM_I_INUMP (y) || SCM_BIGP (y) || SCM_FRACTIONP (y))
        return scm_i_exact_rational_round_quotient (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_round_quotient, x, y, SCM_ARG2,
-                           s_scm_round_quotient);
+       return scm_wta_dispatch_2 (g_scm_round_quotient, x, y, SCM_ARG2,
+                                   s_scm_round_quotient);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_scm_round_quotient, x, y, SCM_ARG1,
-                       s_scm_round_quotient);
+    return scm_wta_dispatch_2 (g_scm_round_quotient, x, y, SCM_ARG1,
+                               s_scm_round_quotient);
 }
 #undef FUNC_NAME
 
@@ -3488,8 +3487,8 @@ SCM_PRIMITIVE_GENERIC (scm_round_remainder, "round-remainder", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_round_remainder (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_round_remainder, x, y, SCM_ARG2,
-                           s_scm_round_remainder);
+       return scm_wta_dispatch_2 (g_scm_round_remainder, x, y, SCM_ARG2,
+                                   s_scm_round_remainder);
     }
   else if (SCM_BIGP (x))
     {
@@ -3536,8 +3535,8 @@ SCM_PRIMITIVE_GENERIC (scm_round_remainder, "round-remainder", 2, 0, 0,
       else if (SCM_FRACTIONP (y))
        return scm_i_exact_rational_round_remainder (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_round_remainder, x, y, SCM_ARG2,
-                           s_scm_round_remainder);
+       return scm_wta_dispatch_2 (g_scm_round_remainder, x, y, SCM_ARG2,
+                                   s_scm_round_remainder);
     }
   else if (SCM_REALP (x))
     {
@@ -3546,8 +3545,8 @@ SCM_PRIMITIVE_GENERIC (scm_round_remainder, "round-remainder", 2, 0, 0,
        return scm_i_inexact_round_remainder
          (SCM_REAL_VALUE (x), scm_to_double (y));
       else
-       SCM_WTA_DISPATCH_2 (g_scm_round_remainder, x, y, SCM_ARG2,
-                           s_scm_round_remainder);
+       return scm_wta_dispatch_2 (g_scm_round_remainder, x, y, SCM_ARG2,
+                                   s_scm_round_remainder);
     }
   else if (SCM_FRACTIONP (x))
     {
@@ -3557,12 +3556,12 @@ SCM_PRIMITIVE_GENERIC (scm_round_remainder, "round-remainder", 2, 0, 0,
       else if (SCM_I_INUMP (y) || SCM_BIGP (y) || SCM_FRACTIONP (y))
        return scm_i_exact_rational_round_remainder (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_round_remainder, x, y, SCM_ARG2,
-                           s_scm_round_remainder);
+       return scm_wta_dispatch_2 (g_scm_round_remainder, x, y, SCM_ARG2,
+                                   s_scm_round_remainder);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_scm_round_remainder, x, y, SCM_ARG1,
-                       s_scm_round_remainder);
+    return scm_wta_dispatch_2 (g_scm_round_remainder, x, y, SCM_ARG1,
+                               s_scm_round_remainder);
 }
 #undef FUNC_NAME
 
@@ -3946,7 +3945,7 @@ scm_gcd (SCM x, SCM y)
           goto big_inum;
         }
       else
-        SCM_WTA_DISPATCH_2 (g_gcd, x, y, SCM_ARG2, s_gcd);
+        return scm_wta_dispatch_2 (g_gcd, x, y, SCM_ARG2, s_gcd);
     }
   else if (SCM_BIGP (x))
     {
@@ -3976,10 +3975,10 @@ scm_gcd (SCM x, SCM y)
           return scm_i_normbig (result);
         }
       else
-        SCM_WTA_DISPATCH_2 (g_gcd, x, y, SCM_ARG2, s_gcd);
+        return scm_wta_dispatch_2 (g_gcd, x, y, SCM_ARG2, s_gcd);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_gcd, x, y, SCM_ARG1, s_gcd);
+    return scm_wta_dispatch_2 (g_gcd, x, y, SCM_ARG1, s_gcd);
 }
 
 SCM_PRIMITIVE_GENERIC (scm_i_lcm, "lcm", 0, 2, 1,
@@ -4010,10 +4009,11 @@ scm_lcm (SCM n1, SCM n2)
       n2 = SCM_I_MAKINUM (1L);
     }
 
-  SCM_GASSERT2 (SCM_I_INUMP (n1) || SCM_BIGP (n1),
-                g_lcm, n1, n2, SCM_ARG1, s_lcm);
-  SCM_GASSERT2 (SCM_I_INUMP (n2) || SCM_BIGP (n2),
-                g_lcm, n1, n2, SCM_ARGn, s_lcm);
+  if (SCM_UNLIKELY (!(SCM_I_INUMP (n1) || SCM_BIGP (n1))))
+    return scm_wta_dispatch_2 (g_lcm, n1, n2, SCM_ARG1, s_lcm);
+  
+  if (SCM_UNLIKELY (!(SCM_I_INUMP (n2) || SCM_BIGP (n2))))
+    return scm_wta_dispatch_2 (g_lcm, n1, n2, SCM_ARG2, s_lcm);
 
   if (SCM_I_INUMP (n1))
     {
@@ -5143,12 +5143,6 @@ idbl2str (double f, char *a, int radix)
       exp++;
     }
  zero:
-#ifdef ENGNOT 
-  /* adding 9999 makes this equivalent to abs(x) % 3 */
-  dpt = (exp + 9999) % 3;
-  exp -= dpt++;
-  efmt = 1;
-#else
   efmt = (exp < -3) || (exp > wp + 2);
   if (!efmt)
     {
@@ -5165,7 +5159,6 @@ idbl2str (double f, char *a, int radix)
     }
   else
     dpt = 1;
-#endif
 
   do
     {
@@ -5187,7 +5180,6 @@ idbl2str (double f, char *a, int radix)
 
   if (dpt > 0)
     {
-#ifndef ENGNOT
       if ((dpt > 4) && (exp > 6))
        {
          d = (a[0] == '-' ? 2 : 1);
@@ -5197,7 +5189,6 @@ idbl2str (double f, char *a, int radix)
          efmt = 1;
        }
       else
-#endif
        {
          while (--dpt)
            a[ch++] = '0';
@@ -5359,7 +5350,7 @@ int
 scm_print_real (SCM sexp, SCM port, scm_print_state *pstate SCM_UNUSED)
 {
   char num_buf[FLOBUFLEN];
-  scm_lfwrite (num_buf, iflo2str (sexp, num_buf, 10), port);
+  scm_lfwrite_unlocked (num_buf, iflo2str (sexp, num_buf, 10), port);
   return !0;
 }
 
@@ -5367,7 +5358,7 @@ void
 scm_i_print_double (double val, SCM port)
 {
   char num_buf[FLOBUFLEN];
-  scm_lfwrite (num_buf, idbl2str (val, num_buf, 10), port);
+  scm_lfwrite_unlocked (num_buf, idbl2str (val, num_buf, 10), port);
 }
 
 int
@@ -5375,7 +5366,7 @@ scm_print_complex (SCM sexp, SCM port, scm_print_state *pstate SCM_UNUSED)
 
 {
   char num_buf[FLOBUFLEN];
-  scm_lfwrite (num_buf, iflo2str (sexp, num_buf, 10), port);
+  scm_lfwrite_unlocked (num_buf, iflo2str (sexp, num_buf, 10), port);
   return !0;
 }
 
@@ -5383,7 +5374,7 @@ void
 scm_i_print_complex (double real, double imag, SCM port)
 {
   char num_buf[FLOBUFLEN];
-  scm_lfwrite (num_buf, icmplx2str (real, imag, num_buf, 10), port);
+  scm_lfwrite_unlocked (num_buf, icmplx2str (real, imag, num_buf, 10), port);
 }
 
 int
@@ -5404,7 +5395,7 @@ scm_bigprint (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED)
   void (*freefunc) (void *, size_t);
   mp_get_memory_functions (NULL, NULL, &freefunc);
   scm_remember_upto_here_1 (exp);
-  scm_lfwrite (str, len, port);
+  scm_lfwrite_unlocked (str, len, port);
   freefunc (str, len + 1);
   return !0;
 }
@@ -6241,7 +6232,8 @@ scm_num_eq_p (SCM x, SCM y)
       else if (SCM_FRACTIONP (y))
        return SCM_BOOL_F;
       else
-       SCM_WTA_DISPATCH_2 (g_scm_i_num_eq_p, x, y, SCM_ARGn, s_scm_i_num_eq_p);
+       return scm_wta_dispatch_2 (g_scm_i_num_eq_p, x, y, SCM_ARGn,
+                                   s_scm_i_num_eq_p);
     }
   else if (SCM_BIGP (x))
     {
@@ -6276,7 +6268,8 @@ scm_num_eq_p (SCM x, SCM y)
       else if (SCM_FRACTIONP (y))
        return SCM_BOOL_F;
       else
-       SCM_WTA_DISPATCH_2 (g_scm_i_num_eq_p, x, y, SCM_ARGn, s_scm_i_num_eq_p);
+       return scm_wta_dispatch_2 (g_scm_i_num_eq_p, x, y, SCM_ARGn,
+                                   s_scm_i_num_eq_p);
     }
   else if (SCM_REALP (x))
     {
@@ -6314,7 +6307,8 @@ scm_num_eq_p (SCM x, SCM y)
           goto again;
         }
       else
-       SCM_WTA_DISPATCH_2 (g_scm_i_num_eq_p, x, y, SCM_ARGn, s_scm_i_num_eq_p);
+       return scm_wta_dispatch_2 (g_scm_i_num_eq_p, x, y, SCM_ARGn,
+                                   s_scm_i_num_eq_p);
     }
   else if (SCM_COMPLEXP (x))
     {
@@ -6352,7 +6346,8 @@ scm_num_eq_p (SCM x, SCM y)
           goto again;
         }
       else
-       SCM_WTA_DISPATCH_2 (g_scm_i_num_eq_p, x, y, SCM_ARGn, s_scm_i_num_eq_p);
+       return scm_wta_dispatch_2 (g_scm_i_num_eq_p, x, y, SCM_ARGn,
+                                   s_scm_i_num_eq_p);
     }
   else if (SCM_FRACTIONP (x))
     {
@@ -6386,10 +6381,12 @@ scm_num_eq_p (SCM x, SCM y)
       else if (SCM_FRACTIONP (y))
        return scm_i_fraction_equalp (x, y);
       else
-       SCM_WTA_DISPATCH_2 (g_scm_i_num_eq_p, x, y, SCM_ARGn, s_scm_i_num_eq_p);
+       return scm_wta_dispatch_2 (g_scm_i_num_eq_p, x, y, SCM_ARGn,
+                                   s_scm_i_num_eq_p);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_scm_i_num_eq_p, x, y, SCM_ARG1, s_scm_i_num_eq_p);
+    return scm_wta_dispatch_2 (g_scm_i_num_eq_p, x, y, SCM_ARG1,
+                               s_scm_i_num_eq_p);
 }
 
 
@@ -6448,7 +6445,8 @@ scm_less_p (SCM x, SCM y)
           goto again;
         }
       else
-       SCM_WTA_DISPATCH_2 (g_scm_i_num_less_p, x, y, SCM_ARGn, s_scm_i_num_less_p);
+       return scm_wta_dispatch_2 (g_scm_i_num_less_p, x, y, SCM_ARGn,
+                                   s_scm_i_num_less_p);
     }
   else if (SCM_BIGP (x))
     {
@@ -6476,7 +6474,8 @@ scm_less_p (SCM x, SCM y)
       else if (SCM_FRACTIONP (y))
         goto int_frac;
       else
-       SCM_WTA_DISPATCH_2 (g_scm_i_num_less_p, x, y, SCM_ARGn, s_scm_i_num_less_p);
+       return scm_wta_dispatch_2 (g_scm_i_num_less_p, x, y, SCM_ARGn,
+                                   s_scm_i_num_less_p);
     }
   else if (SCM_REALP (x))
     {
@@ -6504,7 +6503,8 @@ scm_less_p (SCM x, SCM y)
           goto again;
         }
       else
-       SCM_WTA_DISPATCH_2 (g_scm_i_num_less_p, x, y, SCM_ARGn, s_scm_i_num_less_p);
+       return scm_wta_dispatch_2 (g_scm_i_num_less_p, x, y, SCM_ARGn,
+                                   s_scm_i_num_less_p);
     }
   else if (SCM_FRACTIONP (x))
     {
@@ -6537,10 +6537,12 @@ scm_less_p (SCM x, SCM y)
           goto again;
         }
       else
-       SCM_WTA_DISPATCH_2 (g_scm_i_num_less_p, x, y, SCM_ARGn, s_scm_i_num_less_p);
+       return scm_wta_dispatch_2 (g_scm_i_num_less_p, x, y, SCM_ARGn,
+                                   s_scm_i_num_less_p);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_scm_i_num_less_p, x, y, SCM_ARG1, s_scm_i_num_less_p);
+    return scm_wta_dispatch_2 (g_scm_i_num_less_p, x, y, SCM_ARG1,
+                               s_scm_i_num_less_p);
 }
 
 
@@ -6569,9 +6571,9 @@ SCM
 scm_gr_p (SCM x, SCM y)
 {
   if (!SCM_NUMBERP (x))
-    SCM_WTA_DISPATCH_2 (g_scm_i_num_gr_p, x, y, SCM_ARG1, FUNC_NAME);
+    return scm_wta_dispatch_2 (g_scm_i_num_gr_p, x, y, SCM_ARG1, FUNC_NAME);
   else if (!SCM_NUMBERP (y))
-    SCM_WTA_DISPATCH_2 (g_scm_i_num_gr_p, x, y, SCM_ARG2, FUNC_NAME);
+    return scm_wta_dispatch_2 (g_scm_i_num_gr_p, x, y, SCM_ARG2, FUNC_NAME);
   else
     return scm_less_p (y, x);
 }
@@ -6603,9 +6605,9 @@ SCM
 scm_leq_p (SCM x, SCM y)
 {
   if (!SCM_NUMBERP (x))
-    SCM_WTA_DISPATCH_2 (g_scm_i_num_leq_p, x, y, SCM_ARG1, FUNC_NAME);
+    return scm_wta_dispatch_2 (g_scm_i_num_leq_p, x, y, SCM_ARG1, FUNC_NAME);
   else if (!SCM_NUMBERP (y))
-    SCM_WTA_DISPATCH_2 (g_scm_i_num_leq_p, x, y, SCM_ARG2, FUNC_NAME);
+    return scm_wta_dispatch_2 (g_scm_i_num_leq_p, x, y, SCM_ARG2, FUNC_NAME);
   else if (scm_is_true (scm_nan_p (x)) || scm_is_true (scm_nan_p (y)))
     return SCM_BOOL_F;
   else
@@ -6639,9 +6641,9 @@ SCM
 scm_geq_p (SCM x, SCM y)
 {
   if (!SCM_NUMBERP (x))
-    SCM_WTA_DISPATCH_2 (g_scm_i_num_geq_p, x, y, SCM_ARG1, FUNC_NAME);
+    return scm_wta_dispatch_2 (g_scm_i_num_geq_p, x, y, SCM_ARG1, FUNC_NAME);
   else if (!SCM_NUMBERP (y))
-    SCM_WTA_DISPATCH_2 (g_scm_i_num_geq_p, x, y, SCM_ARG2, FUNC_NAME);
+    return scm_wta_dispatch_2 (g_scm_i_num_geq_p, x, y, SCM_ARG2, FUNC_NAME);
   else if (scm_is_true (scm_nan_p (x)) || scm_is_true (scm_nan_p (y)))
     return SCM_BOOL_F;
   else
@@ -6668,7 +6670,7 @@ SCM_PRIMITIVE_GENERIC (scm_zero_p, "zero?", 1, 0, 0,
   else if (SCM_FRACTIONP (z))
     return SCM_BOOL_F;
   else
-    SCM_WTA_DISPATCH_1 (g_scm_zero_p, z, SCM_ARG1, s_scm_zero_p);
+    return scm_wta_dispatch_1 (g_scm_zero_p, z, SCM_ARG1, s_scm_zero_p);
 }
 #undef FUNC_NAME
 
@@ -6692,7 +6694,7 @@ SCM_PRIMITIVE_GENERIC (scm_positive_p, "positive?", 1, 0, 0,
   else if (SCM_FRACTIONP (x))
     return scm_positive_p (SCM_FRACTION_NUMERATOR (x));
   else
-    SCM_WTA_DISPATCH_1 (g_scm_positive_p, x, SCM_ARG1, s_scm_positive_p);
+    return scm_wta_dispatch_1 (g_scm_positive_p, x, SCM_ARG1, s_scm_positive_p);
 }
 #undef FUNC_NAME
 
@@ -6716,7 +6718,7 @@ SCM_PRIMITIVE_GENERIC (scm_negative_p, "negative?", 1, 0, 0,
   else if (SCM_FRACTIONP (x))
     return scm_negative_p (SCM_FRACTION_NUMERATOR (x));
   else
-    SCM_WTA_DISPATCH_1 (g_scm_negative_p, x, SCM_ARG1, s_scm_negative_p);
+    return scm_wta_dispatch_1 (g_scm_negative_p, x, SCM_ARG1, s_scm_negative_p);
 }
 #undef FUNC_NAME
 
@@ -6750,11 +6752,11 @@ scm_max (SCM x, SCM y)
   if (SCM_UNBNDP (y))
     {
       if (SCM_UNBNDP (x))
-       SCM_WTA_DISPATCH_0 (g_max, s_max);
+       return scm_wta_dispatch_0 (g_max, s_max);
       else if (SCM_I_INUMP(x) || SCM_BIGP(x) || SCM_REALP(x) || SCM_FRACTIONP(x))
        return x;
       else
-       SCM_WTA_DISPATCH_1 (g_max, x, SCM_ARG1, s_max);
+       return scm_wta_dispatch_1 (g_max, x, SCM_ARG1, s_max);
     }
   
   if (SCM_I_INUMP (x))
@@ -6793,7 +6795,7 @@ scm_max (SCM x, SCM y)
           return (scm_is_false (scm_less_p (x, y)) ? x : y);
        }
       else
-       SCM_WTA_DISPATCH_2 (g_max, x, y, SCM_ARGn, s_max);
+       return scm_wta_dispatch_2 (g_max, x, y, SCM_ARGn, s_max);
     }
   else if (SCM_BIGP (x))
     {
@@ -6823,7 +6825,7 @@ scm_max (SCM x, SCM y)
           goto use_less;
        }
       else
-       SCM_WTA_DISPATCH_2 (g_max, x, y, SCM_ARGn, s_max);
+       return scm_wta_dispatch_2 (g_max, x, y, SCM_ARGn, s_max);
     }
   else if (SCM_REALP (x))
     {
@@ -6878,7 +6880,7 @@ scm_max (SCM x, SCM y)
          return (xx < yy) ? scm_from_double (yy) : x;
        }
       else
-       SCM_WTA_DISPATCH_2 (g_max, x, y, SCM_ARGn, s_max);
+       return scm_wta_dispatch_2 (g_max, x, y, SCM_ARGn, s_max);
     }
   else if (SCM_FRACTIONP (x))
     {
@@ -6901,10 +6903,10 @@ scm_max (SCM x, SCM y)
           goto use_less;
        }
       else
-       SCM_WTA_DISPATCH_2 (g_max, x, y, SCM_ARGn, s_max);
+       return scm_wta_dispatch_2 (g_max, x, y, SCM_ARGn, s_max);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_max, x, y, SCM_ARG1, s_max);
+    return scm_wta_dispatch_2 (g_max, x, y, SCM_ARG1, s_max);
 }
 
 
@@ -6931,11 +6933,11 @@ scm_min (SCM x, SCM y)
   if (SCM_UNBNDP (y))
     {
       if (SCM_UNBNDP (x))
-       SCM_WTA_DISPATCH_0 (g_min, s_min);
+       return scm_wta_dispatch_0 (g_min, s_min);
       else if (SCM_I_INUMP(x) || SCM_BIGP(x) || SCM_REALP(x) || SCM_FRACTIONP(x))
        return x;
       else
-       SCM_WTA_DISPATCH_1 (g_min, x, SCM_ARG1, s_min);
+       return scm_wta_dispatch_1 (g_min, x, SCM_ARG1, s_min);
     }
   
   if (SCM_I_INUMP (x))
@@ -6964,7 +6966,7 @@ scm_min (SCM x, SCM y)
           return (scm_is_false (scm_less_p (x, y)) ? y : x);
        }
       else
-       SCM_WTA_DISPATCH_2 (g_min, x, y, SCM_ARGn, s_min);
+       return scm_wta_dispatch_2 (g_min, x, y, SCM_ARGn, s_min);
     }
   else if (SCM_BIGP (x))
     {
@@ -6994,7 +6996,7 @@ scm_min (SCM x, SCM y)
           goto use_less;
        }
       else
-       SCM_WTA_DISPATCH_2 (g_min, x, y, SCM_ARGn, s_min);
+       return scm_wta_dispatch_2 (g_min, x, y, SCM_ARGn, s_min);
     }
   else if (SCM_REALP (x))
     {
@@ -7038,7 +7040,7 @@ scm_min (SCM x, SCM y)
          return (yy < xx) ? scm_from_double (yy) : x;
        }
       else
-       SCM_WTA_DISPATCH_2 (g_min, x, y, SCM_ARGn, s_min);
+       return scm_wta_dispatch_2 (g_min, x, y, SCM_ARGn, s_min);
     }
   else if (SCM_FRACTIONP (x))
     {
@@ -7061,10 +7063,10 @@ scm_min (SCM x, SCM y)
           goto use_less;
        }
       else
-       SCM_WTA_DISPATCH_2 (g_min, x, y, SCM_ARGn, s_min);
+       return scm_wta_dispatch_2 (g_min, x, y, SCM_ARGn, s_min);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_min, x, y, SCM_ARG1, s_min);
+    return scm_wta_dispatch_2 (g_min, x, y, SCM_ARG1, s_min);
 }
 
 
@@ -7093,7 +7095,7 @@ scm_sum (SCM x, SCM y)
     {
       if (SCM_NUMBERP (x)) return x;
       if (SCM_UNBNDP (x)) return SCM_INUM0;
-      SCM_WTA_DISPATCH_1 (g_sum, x, SCM_ARG1, s_sum);
+      return scm_wta_dispatch_1 (g_sum, x, SCM_ARG1, s_sum);
     }
 
   if (SCM_LIKELY (SCM_I_INUMP (x)))
@@ -7126,7 +7128,7 @@ scm_sum (SCM x, SCM y)
                                        scm_product (x, SCM_FRACTION_DENOMINATOR (y))),
                               SCM_FRACTION_DENOMINATOR (y));
       else
-        SCM_WTA_DISPATCH_2 (g_sum, x, y, SCM_ARGn, s_sum);
+        return scm_wta_dispatch_2 (g_sum, x, y, SCM_ARGn, s_sum);
     } else if (SCM_BIGP (x))
       {
        if (SCM_I_INUMP (y))
@@ -7191,7 +7193,7 @@ scm_sum (SCM x, SCM y)
                                          scm_product (x, SCM_FRACTION_DENOMINATOR (y))),
                                 SCM_FRACTION_DENOMINATOR (y));
        else
-         SCM_WTA_DISPATCH_2 (g_sum, x, y, SCM_ARGn, s_sum);
+         return scm_wta_dispatch_2 (g_sum, x, y, SCM_ARGn, s_sum);
       }
   else if (SCM_REALP (x))
     {
@@ -7211,7 +7213,7 @@ scm_sum (SCM x, SCM y)
       else if (SCM_FRACTIONP (y))
        return scm_from_double (SCM_REAL_VALUE (x) + scm_i_fraction2double (y));
       else
-       SCM_WTA_DISPATCH_2 (g_sum, x, y, SCM_ARGn, s_sum);
+       return scm_wta_dispatch_2 (g_sum, x, y, SCM_ARGn, s_sum);
     }
   else if (SCM_COMPLEXP (x))
     {
@@ -7235,7 +7237,7 @@ scm_sum (SCM x, SCM y)
        return scm_c_make_rectangular (SCM_COMPLEX_REAL (x) + scm_i_fraction2double (y),
                                 SCM_COMPLEX_IMAG (x));
       else
-       SCM_WTA_DISPATCH_2 (g_sum, x, y, SCM_ARGn, s_sum);
+       return scm_wta_dispatch_2 (g_sum, x, y, SCM_ARGn, s_sum);
     }
   else if (SCM_FRACTIONP (x))
     {
@@ -7258,10 +7260,10 @@ scm_sum (SCM x, SCM y)
                                        scm_product (SCM_FRACTION_NUMERATOR (y), SCM_FRACTION_DENOMINATOR (x))),
                               scm_product (SCM_FRACTION_DENOMINATOR (x), SCM_FRACTION_DENOMINATOR (y)));
       else
-       SCM_WTA_DISPATCH_2 (g_sum, x, y, SCM_ARGn, s_sum);
+       return scm_wta_dispatch_2 (g_sum, x, y, SCM_ARGn, s_sum);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_sum, x, y, SCM_ARG1, s_sum);
+    return scm_wta_dispatch_2 (g_sum, x, y, SCM_ARG1, s_sum);
 }
 
 
@@ -7301,7 +7303,7 @@ scm_difference (SCM x, SCM y)
   if (SCM_UNLIKELY (SCM_UNBNDP (y)))
     {
       if (SCM_UNBNDP (x))
-        SCM_WTA_DISPATCH_0 (g_difference, s_difference);
+        return scm_wta_dispatch_0 (g_difference, s_difference);
       else 
         if (SCM_I_INUMP (x))
           {
@@ -7324,7 +7326,7 @@ scm_difference (SCM x, SCM y)
          return scm_i_make_ratio (scm_difference (SCM_FRACTION_NUMERATOR (x), SCM_UNDEFINED),
                                 SCM_FRACTION_DENOMINATOR (x));
         else
-          SCM_WTA_DISPATCH_1 (g_difference, x, SCM_ARG1, s_difference);
+          return scm_wta_dispatch_1 (g_difference, x, SCM_ARG1, s_difference);
     }
   
   if (SCM_LIKELY (SCM_I_INUMP (x)))
@@ -7411,7 +7413,7 @@ scm_difference (SCM x, SCM y)
                                               SCM_FRACTION_NUMERATOR (y)),
                               SCM_FRACTION_DENOMINATOR (y));
       else
-       SCM_WTA_DISPATCH_2 (g_difference, x, y, SCM_ARGn, s_difference);
+       return scm_wta_dispatch_2 (g_difference, x, y, SCM_ARGn, s_difference);
     }
   else if (SCM_BIGP (x))
     {
@@ -7475,7 +7477,8 @@ scm_difference (SCM x, SCM y)
        return scm_i_make_ratio (scm_difference (scm_product (x, SCM_FRACTION_DENOMINATOR (y)),
                                               SCM_FRACTION_NUMERATOR (y)),
                               SCM_FRACTION_DENOMINATOR (y));
-      else SCM_WTA_DISPATCH_2 (g_difference, x, y, SCM_ARGn, s_difference);
+      else
+        return scm_wta_dispatch_2 (g_difference, x, y, SCM_ARGn, s_difference);
     }
   else if (SCM_REALP (x))
     {
@@ -7495,7 +7498,7 @@ scm_difference (SCM x, SCM y)
       else if (SCM_FRACTIONP (y))
        return scm_from_double (SCM_REAL_VALUE (x) - scm_i_fraction2double (y));
       else
-       SCM_WTA_DISPATCH_2 (g_difference, x, y, SCM_ARGn, s_difference);
+       return scm_wta_dispatch_2 (g_difference, x, y, SCM_ARGn, s_difference);
     }
   else if (SCM_COMPLEXP (x))
     {
@@ -7519,7 +7522,7 @@ scm_difference (SCM x, SCM y)
        return scm_c_make_rectangular (SCM_COMPLEX_REAL (x) - scm_i_fraction2double (y),
                                 SCM_COMPLEX_IMAG (x));
       else
-       SCM_WTA_DISPATCH_2 (g_difference, x, y, SCM_ARGn, s_difference);
+       return scm_wta_dispatch_2 (g_difference, x, y, SCM_ARGn, s_difference);
     }
   else if (SCM_FRACTIONP (x))
     {
@@ -7543,10 +7546,10 @@ scm_difference (SCM x, SCM y)
                                               scm_product (SCM_FRACTION_NUMERATOR (y), SCM_FRACTION_DENOMINATOR (x))),
                               scm_product (SCM_FRACTION_DENOMINATOR (x), SCM_FRACTION_DENOMINATOR (y)));
       else
-       SCM_WTA_DISPATCH_2 (g_difference, x, y, SCM_ARGn, s_difference);
+       return scm_wta_dispatch_2 (g_difference, x, y, SCM_ARGn, s_difference);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_difference, x, y, SCM_ARG1, s_difference);
+    return scm_wta_dispatch_2 (g_difference, x, y, SCM_ARG1, s_difference);
 }
 #undef FUNC_NAME
 
@@ -7589,7 +7592,7 @@ scm_product (SCM x, SCM y)
       else if (SCM_NUMBERP (x))
        return x;
       else
-       SCM_WTA_DISPATCH_1 (g_product, x, SCM_ARG1, s_product);
+       return scm_wta_dispatch_1 (g_product, x, SCM_ARG1, s_product);
     }
   
   if (SCM_LIKELY (SCM_I_INUMP (x)))
@@ -7622,7 +7625,7 @@ scm_product (SCM x, SCM y)
          else if (SCM_NUMP (y))
            return SCM_INUM0;
          else
-           SCM_WTA_DISPATCH_2 (g_product, x, y, SCM_ARGn, s_product);
+           return scm_wta_dispatch_2 (g_product, x, y, SCM_ARGn, s_product);
          break;
         case -1:
          /*
@@ -7667,7 +7670,7 @@ scm_product (SCM x, SCM y)
        return scm_i_make_ratio (scm_product (x, SCM_FRACTION_NUMERATOR (y)),
                               SCM_FRACTION_DENOMINATOR (y));
       else
-       SCM_WTA_DISPATCH_2 (g_product, x, y, SCM_ARGn, s_product);
+       return scm_wta_dispatch_2 (g_product, x, y, SCM_ARGn, s_product);
     }
   else if (SCM_BIGP (x))
     {
@@ -7702,7 +7705,7 @@ scm_product (SCM x, SCM y)
        return scm_i_make_ratio (scm_product (x, SCM_FRACTION_NUMERATOR (y)),
                               SCM_FRACTION_DENOMINATOR (y));
       else
-       SCM_WTA_DISPATCH_2 (g_product, x, y, SCM_ARGn, s_product);
+       return scm_wta_dispatch_2 (g_product, x, y, SCM_ARGn, s_product);
     }
   else if (SCM_REALP (x))
     {
@@ -7725,7 +7728,7 @@ scm_product (SCM x, SCM y)
       else if (SCM_FRACTIONP (y))
        return scm_from_double (SCM_REAL_VALUE (x) * scm_i_fraction2double (y));
       else
-       SCM_WTA_DISPATCH_2 (g_product, x, y, SCM_ARGn, s_product);
+       return scm_wta_dispatch_2 (g_product, x, y, SCM_ARGn, s_product);
     }
   else if (SCM_COMPLEXP (x))
     {
@@ -7758,7 +7761,7 @@ scm_product (SCM x, SCM y)
                                   yy * SCM_COMPLEX_IMAG (x));
        }
       else
-       SCM_WTA_DISPATCH_2 (g_product, x, y, SCM_ARGn, s_product);
+       return scm_wta_dispatch_2 (g_product, x, y, SCM_ARGn, s_product);
     }
   else if (SCM_FRACTIONP (x))
     {
@@ -7783,10 +7786,10 @@ scm_product (SCM x, SCM y)
                               scm_product (SCM_FRACTION_DENOMINATOR (x),
                                            SCM_FRACTION_DENOMINATOR (y)));
       else
-       SCM_WTA_DISPATCH_2 (g_product, x, y, SCM_ARGn, s_product);
+       return scm_wta_dispatch_2 (g_product, x, y, SCM_ARGn, s_product);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_product, x, y, SCM_ARG1, s_product);
+    return scm_wta_dispatch_2 (g_product, x, y, SCM_ARG1, s_product);
 }
 
 #if ((defined (HAVE_ISINF) && defined (HAVE_ISNAN)) \
@@ -7850,7 +7853,7 @@ do_divide (SCM x, SCM y, int inexact)
   if (SCM_UNLIKELY (SCM_UNBNDP (y)))
     {
       if (SCM_UNBNDP (x))
-       SCM_WTA_DISPATCH_0 (g_divide, s_divide);
+       return scm_wta_dispatch_0 (g_divide, s_divide);
       else if (SCM_I_INUMP (x))
        {
          scm_t_inum xx = SCM_I_INUM (x);
@@ -7904,7 +7907,7 @@ do_divide (SCM x, SCM y, int inexact)
        return scm_i_make_ratio (SCM_FRACTION_DENOMINATOR (x),
                               SCM_FRACTION_NUMERATOR (x));
       else
-       SCM_WTA_DISPATCH_1 (g_divide, x, SCM_ARG1, s_divide);
+       return scm_wta_dispatch_1 (g_divide, x, SCM_ARG1, s_divide);
     }
 
   if (SCM_LIKELY (SCM_I_INUMP (x)))
@@ -7978,7 +7981,7 @@ do_divide (SCM x, SCM y, int inexact)
        return scm_i_make_ratio (scm_product (x, SCM_FRACTION_DENOMINATOR (y)),
                               SCM_FRACTION_NUMERATOR (y));
       else
-       SCM_WTA_DISPATCH_2 (g_divide, x, y, SCM_ARGn, s_divide);
+       return scm_wta_dispatch_2 (g_divide, x, y, SCM_ARGn, s_divide);
     }
   else if (SCM_BIGP (x))
     {
@@ -8077,7 +8080,7 @@ do_divide (SCM x, SCM y, int inexact)
        return scm_i_make_ratio (scm_product (x, SCM_FRACTION_DENOMINATOR (y)),
                               SCM_FRACTION_NUMERATOR (y));
       else
-       SCM_WTA_DISPATCH_2 (g_divide, x, y, SCM_ARGn, s_divide);
+       return scm_wta_dispatch_2 (g_divide, x, y, SCM_ARGn, s_divide);
     }
   else if (SCM_REALP (x))
     {
@@ -8116,7 +8119,7 @@ do_divide (SCM x, SCM y, int inexact)
       else if (SCM_FRACTIONP (y))
        return scm_from_double (rx / scm_i_fraction2double (y));
       else
-       SCM_WTA_DISPATCH_2 (g_divide, x, y, SCM_ARGn, s_divide);
+       return scm_wta_dispatch_2 (g_divide, x, y, SCM_ARGn, s_divide);
     }
   else if (SCM_COMPLEXP (x))
     {
@@ -8174,7 +8177,7 @@ do_divide (SCM x, SCM y, int inexact)
          return scm_c_make_rectangular (rx / yy, ix / yy);
        }
       else
-       SCM_WTA_DISPATCH_2 (g_divide, x, y, SCM_ARGn, s_divide);
+       return scm_wta_dispatch_2 (g_divide, x, y, SCM_ARGn, s_divide);
     }
   else if (SCM_FRACTIONP (x))
     {
@@ -8213,10 +8216,10 @@ do_divide (SCM x, SCM y, int inexact)
        return scm_i_make_ratio (scm_product (SCM_FRACTION_NUMERATOR (x), SCM_FRACTION_DENOMINATOR (y)),
                               scm_product (SCM_FRACTION_NUMERATOR (y), SCM_FRACTION_DENOMINATOR (x)));
       else 
-       SCM_WTA_DISPATCH_2 (g_divide, x, y, SCM_ARGn, s_divide);
+       return scm_wta_dispatch_2 (g_divide, x, y, SCM_ARGn, s_divide);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_divide, x, y, SCM_ARG1, s_divide);
+    return scm_wta_dispatch_2 (g_divide, x, y, SCM_ARG1, s_divide);
 }
 
 SCM
@@ -8293,7 +8296,7 @@ SCM_PRIMITIVE_GENERIC (scm_truncate_number, "truncate", 1, 0, 0,
     return scm_truncate_quotient (SCM_FRACTION_NUMERATOR (x),
                                  SCM_FRACTION_DENOMINATOR (x));
   else
-    SCM_WTA_DISPATCH_1 (g_scm_truncate_number, x, SCM_ARG1,
+    return scm_wta_dispatch_1 (g_scm_truncate_number, x, SCM_ARG1,
                        s_scm_truncate_number);
 }
 #undef FUNC_NAME
@@ -8313,8 +8316,8 @@ SCM_PRIMITIVE_GENERIC (scm_round_number, "round", 1, 0, 0,
     return scm_round_quotient (SCM_FRACTION_NUMERATOR (x),
                               SCM_FRACTION_DENOMINATOR (x));
   else
-    SCM_WTA_DISPATCH_1 (g_scm_round_number, x, SCM_ARG1,
-                       s_scm_round_number);
+    return scm_wta_dispatch_1 (g_scm_round_number, x, SCM_ARG1,
+                               s_scm_round_number);
 }
 #undef FUNC_NAME
 
@@ -8331,7 +8334,7 @@ SCM_PRIMITIVE_GENERIC (scm_floor, "floor", 1, 0, 0,
     return scm_floor_quotient (SCM_FRACTION_NUMERATOR (x),
                               SCM_FRACTION_DENOMINATOR (x));
   else
-    SCM_WTA_DISPATCH_1 (g_scm_floor, x, 1, s_scm_floor);
+    return scm_wta_dispatch_1 (g_scm_floor, x, 1, s_scm_floor);
 }  
 #undef FUNC_NAME
 
@@ -8348,7 +8351,7 @@ SCM_PRIMITIVE_GENERIC (scm_ceiling, "ceiling", 1, 0, 0,
     return scm_ceiling_quotient (SCM_FRACTION_NUMERATOR (x),
                                 SCM_FRACTION_DENOMINATOR (x));
   else
-    SCM_WTA_DISPATCH_1 (g_scm_ceiling, x, 1, s_scm_ceiling);
+    return scm_wta_dispatch_1 (g_scm_ceiling, x, 1, s_scm_ceiling);
 }
 #undef FUNC_NAME
 
@@ -8387,9 +8390,9 @@ SCM_PRIMITIVE_GENERIC (scm_expt, "expt", 2, 0, 0,
   else if (scm_is_complex (x) && scm_is_complex (y))
     return scm_exp (scm_product (scm_log (x), y));
   else if (scm_is_complex (x))
-    SCM_WTA_DISPATCH_2 (g_scm_expt, x, y, SCM_ARG2, s_scm_expt);
+    return scm_wta_dispatch_2 (g_scm_expt, x, y, SCM_ARG2, s_scm_expt);
   else
-    SCM_WTA_DISPATCH_2 (g_scm_expt, x, y, SCM_ARG1, s_scm_expt);
+    return scm_wta_dispatch_2 (g_scm_expt, x, y, SCM_ARG1, s_scm_expt);
 }
 #undef FUNC_NAME
 
@@ -8416,7 +8419,7 @@ SCM_PRIMITIVE_GENERIC (scm_sin, "sin", 1, 0, 0,
                                      cos (x) * sinh (y));
     }
   else
-    SCM_WTA_DISPATCH_1 (g_scm_sin, z, 1, s_scm_sin);
+    return scm_wta_dispatch_1 (g_scm_sin, z, 1, s_scm_sin);
 }
 #undef FUNC_NAME
 
@@ -8437,7 +8440,7 @@ SCM_PRIMITIVE_GENERIC (scm_cos, "cos", 1, 0, 0,
                                      -sin (x) * sinh (y));
     }
   else
-    SCM_WTA_DISPATCH_1 (g_scm_cos, z, 1, s_scm_cos);
+    return scm_wta_dispatch_1 (g_scm_cos, z, 1, s_scm_cos);
 }
 #undef FUNC_NAME
 
@@ -8462,7 +8465,7 @@ SCM_PRIMITIVE_GENERIC (scm_tan, "tan", 1, 0, 0,
       return scm_c_make_rectangular (sin (x) / w, sinh (y) / w);
     }
   else
-    SCM_WTA_DISPATCH_1 (g_scm_tan, z, 1, s_scm_tan);
+    return scm_wta_dispatch_1 (g_scm_tan, z, 1, s_scm_tan);
 }
 #undef FUNC_NAME
 
@@ -8483,7 +8486,7 @@ SCM_PRIMITIVE_GENERIC (scm_sinh, "sinh", 1, 0, 0,
                                      cosh (x) * sin (y));
     }
   else
-    SCM_WTA_DISPATCH_1 (g_scm_sinh, z, 1, s_scm_sinh);
+    return scm_wta_dispatch_1 (g_scm_sinh, z, 1, s_scm_sinh);
 }
 #undef FUNC_NAME
 
@@ -8504,7 +8507,7 @@ SCM_PRIMITIVE_GENERIC (scm_cosh, "cosh", 1, 0, 0,
                                      sinh (x) * sin (y));
     }
   else
-    SCM_WTA_DISPATCH_1 (g_scm_cosh, z, 1, s_scm_cosh);
+    return scm_wta_dispatch_1 (g_scm_cosh, z, 1, s_scm_cosh);
 }
 #undef FUNC_NAME
 
@@ -8529,7 +8532,7 @@ SCM_PRIMITIVE_GENERIC (scm_tanh, "tanh", 1, 0, 0,
       return scm_c_make_rectangular (sinh (x) / w, sin (y) / w);
     }
   else
-    SCM_WTA_DISPATCH_1 (g_scm_tanh, z, 1, s_scm_tanh);
+    return scm_wta_dispatch_1 (g_scm_tanh, z, 1, s_scm_tanh);
 }
 #undef FUNC_NAME
 
@@ -8557,7 +8560,7 @@ SCM_PRIMITIVE_GENERIC (scm_asin, "asin", 1, 0, 0,
                           scm_sys_asinh (scm_c_make_rectangular (-y, x)));
     }
   else
-    SCM_WTA_DISPATCH_1 (g_scm_asin, z, 1, s_scm_asin);
+    return scm_wta_dispatch_1 (g_scm_asin, z, 1, s_scm_asin);
 }
 #undef FUNC_NAME
 
@@ -8587,7 +8590,7 @@ SCM_PRIMITIVE_GENERIC (scm_acos, "acos", 1, 0, 0,
                                    scm_sys_asinh (scm_c_make_rectangular (-y, x))));
     }
   else
-    SCM_WTA_DISPATCH_1 (g_scm_acos, z, 1, s_scm_acos);
+    return scm_wta_dispatch_1 (g_scm_acos, z, 1, s_scm_acos);
 }
 #undef FUNC_NAME
 
@@ -8614,17 +8617,17 @@ SCM_PRIMITIVE_GENERIC (scm_atan, "atan", 1, 1, 0,
                              scm_c_make_rectangular (0, 2));
         }
       else
-        SCM_WTA_DISPATCH_1 (g_scm_atan, z, SCM_ARG1, s_scm_atan);
+        return scm_wta_dispatch_1 (g_scm_atan, z, SCM_ARG1, s_scm_atan);
     }
   else if (scm_is_real (z))
     {
       if (scm_is_real (y))
         return scm_from_double (atan2 (scm_to_double (z), scm_to_double (y)));
       else
-        SCM_WTA_DISPATCH_2 (g_scm_atan, z, y, SCM_ARG2, s_scm_atan);
+        return scm_wta_dispatch_2 (g_scm_atan, z, y, SCM_ARG2, s_scm_atan);
     }
   else
-    SCM_WTA_DISPATCH_2 (g_scm_atan, z, y, SCM_ARG1, s_scm_atan);
+    return scm_wta_dispatch_2 (g_scm_atan, z, y, SCM_ARG1, s_scm_atan);
 }
 #undef FUNC_NAME
 
@@ -8642,7 +8645,7 @@ SCM_PRIMITIVE_GENERIC (scm_sys_asinh, "asinh", 1, 0, 0,
                              scm_sqrt (scm_sum (scm_product (z, z),
                                                 SCM_INUM1))));
   else
-    SCM_WTA_DISPATCH_1 (g_scm_sys_asinh, z, 1, s_scm_sys_asinh);
+    return scm_wta_dispatch_1 (g_scm_sys_asinh, z, 1, s_scm_sys_asinh);
 }
 #undef FUNC_NAME
 
@@ -8660,7 +8663,7 @@ SCM_PRIMITIVE_GENERIC (scm_sys_acosh, "acosh", 1, 0, 0,
                              scm_sqrt (scm_difference (scm_product (z, z),
                                                        SCM_INUM1))));
   else
-    SCM_WTA_DISPATCH_1 (g_scm_sys_acosh, z, 1, s_scm_sys_acosh);
+    return scm_wta_dispatch_1 (g_scm_sys_acosh, z, 1, s_scm_sys_acosh);
 }
 #undef FUNC_NAME
 
@@ -8678,7 +8681,7 @@ SCM_PRIMITIVE_GENERIC (scm_sys_atanh, "atanh", 1, 0, 0,
                                             scm_difference (SCM_INUM1, z))),
                        SCM_I_MAKINUM (2));
   else
-    SCM_WTA_DISPATCH_1 (g_scm_sys_atanh, z, 1, s_scm_sys_atanh);
+    return scm_wta_dispatch_1 (g_scm_sys_atanh, z, 1, s_scm_sys_atanh);
 }
 #undef FUNC_NAME
 
@@ -8687,7 +8690,7 @@ scm_c_make_rectangular (double re, double im)
 {
   SCM z;
 
-  z = PTR2SCM (scm_gc_malloc_pointerless (sizeof (scm_t_complex),
+  z = SCM_PACK_POINTER (scm_gc_malloc_pointerless (sizeof (scm_t_complex),
                                          "complex"));
   SCM_SET_CELL_TYPE (z, scm_tc16_complex);
   SCM_COMPLEX_REAL (z) = re;
@@ -8779,7 +8782,7 @@ SCM_PRIMITIVE_GENERIC (scm_real_part, "real-part", 1, 0, 0,
   else if (SCM_I_INUMP (z) || SCM_BIGP (z) || SCM_REALP (z) || SCM_FRACTIONP (z))
     return z;
   else
-    SCM_WTA_DISPATCH_1 (g_scm_real_part, z, SCM_ARG1, s_scm_real_part);
+    return scm_wta_dispatch_1 (g_scm_real_part, z, SCM_ARG1, s_scm_real_part);
 }
 #undef FUNC_NAME
 
@@ -8794,7 +8797,7 @@ SCM_PRIMITIVE_GENERIC (scm_imag_part, "imag-part", 1, 0, 0,
   else if (SCM_I_INUMP (z) || SCM_REALP (z) || SCM_BIGP (z) || SCM_FRACTIONP (z))
     return SCM_INUM0;
   else
-    SCM_WTA_DISPATCH_1 (g_scm_imag_part, z, SCM_ARG1, s_scm_imag_part);
+    return scm_wta_dispatch_1 (g_scm_imag_part, z, SCM_ARG1, s_scm_imag_part);
 }
 #undef FUNC_NAME
 
@@ -8810,7 +8813,7 @@ SCM_PRIMITIVE_GENERIC (scm_numerator, "numerator", 1, 0, 0,
   else if (SCM_REALP (z))
     return scm_exact_to_inexact (scm_numerator (scm_inexact_to_exact (z)));
   else
-    SCM_WTA_DISPATCH_1 (g_scm_numerator, z, SCM_ARG1, s_scm_numerator);
+    return scm_wta_dispatch_1 (g_scm_numerator, z, SCM_ARG1, s_scm_numerator);
 }
 #undef FUNC_NAME
 
@@ -8827,7 +8830,8 @@ SCM_PRIMITIVE_GENERIC (scm_denominator, "denominator", 1, 0, 0,
   else if (SCM_REALP (z))
     return scm_exact_to_inexact (scm_denominator (scm_inexact_to_exact (z)));
   else
-    SCM_WTA_DISPATCH_1 (g_scm_denominator, z, SCM_ARG1, s_scm_denominator);
+    return scm_wta_dispatch_1 (g_scm_denominator, z, SCM_ARG1,
+                               s_scm_denominator);
 }
 #undef FUNC_NAME
 
@@ -8869,7 +8873,8 @@ SCM_PRIMITIVE_GENERIC (scm_magnitude, "magnitude", 1, 0, 0,
                             SCM_FRACTION_DENOMINATOR (z));
     }
   else
-    SCM_WTA_DISPATCH_1 (g_scm_magnitude, z, SCM_ARG1, s_scm_magnitude);
+    return scm_wta_dispatch_1 (g_scm_magnitude, z, SCM_ARG1,
+                               s_scm_magnitude);
 }
 #undef FUNC_NAME
 
@@ -8901,7 +8906,8 @@ SCM_PRIMITIVE_GENERIC (scm_angle, "angle", 1, 0, 0,
     }
   else if (SCM_REALP (z))
     {
-      if (SCM_REAL_VALUE (z) >= 0)
+      double x = SCM_REAL_VALUE (z);
+      if (x > 0.0 || double_is_non_negative_zero (x))
         return flo0;
       else
         return scm_from_double (atan2 (0.0, -1.0));
@@ -8915,7 +8921,7 @@ SCM_PRIMITIVE_GENERIC (scm_angle, "angle", 1, 0, 0,
       else return scm_from_double (atan2 (0.0, -1.0));
     }
   else
-    SCM_WTA_DISPATCH_1 (g_scm_angle, z, SCM_ARG1, s_scm_angle);
+    return scm_wta_dispatch_1 (g_scm_angle, z, SCM_ARG1, s_scm_angle);
 }
 #undef FUNC_NAME
 
@@ -8934,7 +8940,8 @@ SCM_PRIMITIVE_GENERIC (scm_exact_to_inexact, "exact->inexact", 1, 0, 0,
   else if (SCM_INEXACTP (z))
     return z;
   else
-    SCM_WTA_DISPATCH_1 (g_scm_exact_to_inexact, z, 1, s_scm_exact_to_inexact);
+    return scm_wta_dispatch_1 (g_scm_exact_to_inexact, z, 1,
+                               s_scm_exact_to_inexact);
 }
 #undef FUNC_NAME
 
@@ -8955,7 +8962,8 @@ SCM_PRIMITIVE_GENERIC (scm_inexact_to_exact, "inexact->exact", 1, 0, 0,
       else if (SCM_COMPLEXP (z) && SCM_COMPLEX_IMAG (z) == 0.0)
        val = SCM_COMPLEX_REAL (z);
       else
-       SCM_WTA_DISPATCH_1 (g_scm_inexact_to_exact, z, 1, s_scm_inexact_to_exact);
+       return scm_wta_dispatch_1 (g_scm_inexact_to_exact, z, 1,
+                                   s_scm_inexact_to_exact);
 
       if (!SCM_LIKELY (DOUBLE_IS_FINITE (val)))
        SCM_OUT_OF_RANGE (1, z);
@@ -9335,7 +9343,7 @@ scm_from_double (double val)
 {
   SCM z;
 
-  z = PTR2SCM (scm_gc_malloc_pointerless (sizeof (scm_t_double), "real"));
+  z = SCM_PACK_POINTER (scm_gc_malloc_pointerless (sizeof (scm_t_double), "real"));
 
   SCM_SET_CELL_TYPE (z, scm_tc16_real);
   SCM_REAL_VALUE (z) = val;
@@ -9343,46 +9351,6 @@ scm_from_double (double val)
   return z;
 }
 
-#if SCM_ENABLE_DEPRECATED == 1
-
-float
-scm_num2float (SCM num, unsigned long pos, const char *s_caller)
-{
-  scm_c_issue_deprecation_warning
-    ("`scm_num2float' is deprecated. Use scm_to_double instead.");
-
-  if (SCM_BIGP (num))
-    {
-      float res = mpz_get_d (SCM_I_BIG_MPZ (num));
-      if (!isinf (res))
-       return res;
-      else
-       scm_out_of_range (NULL, num);
-    }
-  else
-    return scm_to_double (num);
-}
-
-double
-scm_num2double (SCM num, unsigned long pos, const char *s_caller)
-{
-  scm_c_issue_deprecation_warning
-    ("`scm_num2double' is deprecated. Use scm_to_double instead.");
-
-  if (SCM_BIGP (num))
-    {
-      double res = mpz_get_d (SCM_I_BIG_MPZ (num));
-      if (!isinf (res))
-       return res;
-      else
-       scm_out_of_range (NULL, num);
-    }
-  else
-    return scm_to_double (num);
-}
-
-#endif
-
 int
 scm_is_complex (SCM val)
 {
@@ -9532,7 +9500,7 @@ SCM_PRIMITIVE_GENERIC (scm_log, "log", 1, 0, 0,
     return log_of_fraction (SCM_FRACTION_NUMERATOR (z),
                            SCM_FRACTION_DENOMINATOR (z));
   else
-    SCM_WTA_DISPATCH_1 (g_scm_log, z, 1, s_scm_log);
+    return scm_wta_dispatch_1 (g_scm_log, z, 1, s_scm_log);
 }
 #undef FUNC_NAME
 
@@ -9579,7 +9547,7 @@ SCM_PRIMITIVE_GENERIC (scm_log10, "log10", 1, 0, 0,
                        log_of_fraction (SCM_FRACTION_NUMERATOR (z),
                                         SCM_FRACTION_DENOMINATOR (z)));
   else
-    SCM_WTA_DISPATCH_1 (g_scm_log10, z, 1, s_scm_log10);
+    return scm_wta_dispatch_1 (g_scm_log10, z, 1, s_scm_log10);
 }
 #undef FUNC_NAME
 
@@ -9607,7 +9575,7 @@ SCM_PRIMITIVE_GENERIC (scm_exp, "exp", 1, 0, 0,
       return scm_from_double (exp (scm_to_double (z)));
     }
   else
-    SCM_WTA_DISPATCH_1 (g_scm_exp, z, 1, s_scm_exp);
+    return scm_wta_dispatch_1 (g_scm_exp, z, 1, s_scm_exp);
 }
 #undef FUNC_NAME
 
@@ -9712,7 +9680,7 @@ SCM_PRIMITIVE_GENERIC (scm_sqrt, "sqrt", 1, 0, 0,
         return scm_from_double (sqrt (xx));
     }
   else
-    SCM_WTA_DISPATCH_1 (g_scm_sqrt, z, 1, s_scm_sqrt);
+    return scm_wta_dispatch_1 (g_scm_sqrt, z, 1, s_scm_sqrt);
 }
 #undef FUNC_NAME