From 81d56477f2129f6e462b4247bf3d16cb616960c9 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Mon, 2 Aug 2021 16:47:50 +0900
Subject: numeric.c: simpler integer modulo calculation.

---
 src/numeric.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

(limited to 'src/numeric.c')

diff --git a/src/numeric.c b/src/numeric.c
index b8e207a74..7a4da2153 100644
--- a/src/numeric.c
+++ b/src/numeric.c
@@ -1119,15 +1119,11 @@ int_mod(mrb_state *mrb, mrb_value x)
 
   a = mrb_integer(x);
   if (mrb_integer_p(y) && a != MRB_INT_MIN && (b=mrb_integer(y)) != MRB_INT_MIN) {
-    mrb_int mod;
-
-    if (a >= 0 && b >= 0) {
-      mod = a % b;
-    }
-    else {
-      fixdivmod(mrb, a, b, NULL, &mod);
+    mrb_int mod = a % b;
+    if ((a < 0) != (b < 0) && mod != 0) {
+      mod += b;
     }
-    return mrb_fixnum_value(mod);
+    return mrb_int_value(mrb, mod);
   }
 #ifdef MRB_NO_FLOAT
   mrb_raise(mrb, E_TYPE_ERROR, "non integer modulo");
-- 
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