# HG changeset patch
# User fujie
# Date 1470878848 -28800
# Node ID c9917fbd0a31864b851a5ca66f29f3f387cf3b85
# Parent  2dcecbdfda1131611ae8722ef1e17ec47f740db5
Performance of mod operation for long type is 100% up.

public class Test {

    public static void main(String[] args) {
        long LEN = 65000000;
        long result = 0;

        for(long j = 1; j < 20; j++) {
            result = 0;
            for(long i = 1; i < LEN; i++){
                result += i % (j + 1);
            }
        }

        System.out.println("result = " + result);
    }
}

diff -r 2dcecbdfda11 -r c9917fbd0a31 src/cpu/mips/vm/mips_64.ad
--- a/src/cpu/mips/vm/mips_64.ad	Wed Aug 10 17:54:14 2016 +0800
+++ b/src/cpu/mips/vm/mips_64.ad	Thu Aug 11 09:27:28 2016 +0800
@@ -8365,8 +8365,12 @@
     Register op1 = as_Register($src1$$reg);
     Register op2 = as_Register($src2$$reg);
 
-    __ ddiv(op1, op2);
-    __ mfhi(dst);
+    if (UseLoongsonISA) {
+      __ gsdmod(dst, op1, op2);
+    } else {
+      __ ddiv(op1, op2);
+      __ mfhi(dst);
+    }
   %}
   ins_pipe( pipe_slow );
 %}