From 1d40399b9c234374c11b7896ae24fe4a9650a6c5 Mon Sep 17 00:00:00 2001
From: Shoghi Cervantes <shoghicp@gmail.com>
Date: Tue, 8 Apr 2014 16:22:52 +0200
Subject: [PATCH] hacky things D:

---
 src/pocketmine/utils/Random.php | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/pocketmine/utils/Random.php b/src/pocketmine/utils/Random.php
index 26cc4858d..d4e8fd65e 100644
--- a/src/pocketmine/utils/Random.php
+++ b/src/pocketmine/utils/Random.php
@@ -68,9 +68,17 @@ class Random{
 	 * @return int
 	 */
 	public function nextSignedInt(){
-		$this->x ^= ($this->x << 16) & INT32_MASK;
-		$this->x ^= ($this->x >> 5) & INT32_MASK;
-		$this->x ^= ($this->x << 1) & INT32_MASK;
+		if(INT32_MASK === -1){ //32 bit, do hacky things to shift sign
+			$this->x ^= $this->x << 16;
+			$hasBit = $this->x < 1;
+			$t = ($hasBit === true ? $this->x ^ ~0x7fffffff : $this->x) >> 5;
+			$this->x ^= ($hasBit === true ? $t ^ ~0x7fffffff : $t);
+			$this->x ^= $this->x << 1;
+		}else{ //64 bit
+			$this->x ^= ($this->x << 16) & INT32_MASK;
+			$this->x ^= $this->x >> 5;
+			$this->x ^= ($this->x << 1) & INT32_MASK;
+		}
 
 		$t = $this->x;
 		$this->x = $this->y;