From 6ea0c04c0616e55de93e77ba45b9d9933b9460e8 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Mon, 2 Aug 2021 14:09:38 +0900
Subject: numeric.c: use C's modulo operator if both operands are positive.

---
 src/numeric.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'src/numeric.c')

diff --git a/src/numeric.c b/src/numeric.c
index ab6632e52..b8e207a74 100644
--- a/src/numeric.c
+++ b/src/numeric.c
@@ -1121,7 +1121,12 @@ int_mod(mrb_state *mrb, mrb_value x)
   if (mrb_integer_p(y) && a != MRB_INT_MIN && (b=mrb_integer(y)) != MRB_INT_MIN) {
     mrb_int mod;
 
-    fixdivmod(mrb, a, b, NULL, &mod);
+    if (a >= 0 && b >= 0) {
+      mod = a % b;
+    }
+    else {
+      fixdivmod(mrb, a, b, NULL, &mod);
+    }
     return mrb_fixnum_value(mod);
   }
 #ifdef MRB_NO_FLOAT
-- 
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