libgo/runtime/go-rand.c

   1 // Copyright 2009 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 #include "runtime.h"
   6
   7 uint32
   8 runtime_fastrand1(void)
   9 {
  10         uint32 x;
  11
  12         x = m->fastrand;
  13         x += x;
  14         if(x & 0x80000000L)
  15                 x ^= 0x88888eefUL;
  16         m->fastrand = x;
  17         return x;
  18 }