diff --git a/phpseclib/Crypt/Blowfish.php b/phpseclib/Crypt/Blowfish.php
index 19d0a020..aabea8e6 100644
--- a/phpseclib/Crypt/Blowfish.php
+++ b/phpseclib/Crypt/Blowfish.php
@@ -408,16 +408,14 @@ class Blowfish extends Base
 
         for ($i = 0; $i < 16; $i+= 2) {
             $l^= $p[$i];
-            $r^= ($sb_0[$l >> 24 & 0xff]  +
-                  $sb_1[$l >> 16 & 0xff]  ^
+            $r^= $this->safe_intval(($this->safe_intval($sb_0[$l >> 24 & 0xff]  + $sb_1[$l >> 16 & 0xff]) ^
                   $sb_2[$l >>  8 & 0xff]) +
-                  $sb_3[$l       & 0xff];
+                  $sb_3[$l       & 0xff]);
 
             $r^= $p[$i + 1];
-            $l^= ($sb_0[$r >> 24 & 0xff]  +
-                  $sb_1[$r >> 16 & 0xff]  ^
+            $l^= $this->safe_intval(($this->safe_intval($sb_0[$r >> 24 & 0xff]  + $sb_1[$r >> 16 & 0xff]) ^
                   $sb_2[$r >>  8 & 0xff]) +
-                  $sb_3[$r       & 0xff];
+                  $sb_3[$r       & 0xff]);
         }
         return pack("N*", $r ^ $p[17], $l ^ $p[16]);
     }
@@ -443,16 +441,14 @@ class Blowfish extends Base
 
         for ($i = 17; $i > 2; $i-= 2) {
             $l^= $p[$i];
-            $r^= ($sb_0[$l >> 24 & 0xff]  +
-                  $sb_1[$l >> 16 & 0xff]  ^
+            $r^= $this->safe_intval(($this->safe_intval($sb_0[$l >> 24 & 0xff] + $sb_1[$l >> 16 & 0xff]) ^
                   $sb_2[$l >>  8 & 0xff]) +
-                  $sb_3[$l       & 0xff];
+                  $sb_3[$l       & 0xff]);
 
             $r^= $p[$i - 1];
-            $l^= ($sb_0[$r >> 24 & 0xff]  +
-                  $sb_1[$r >> 16 & 0xff]  ^
+            $l^= $this->safe_intval(($this->safe_intval($sb_0[$r >> 24 & 0xff] + $sb_1[$r >> 16 & 0xff]) ^
                   $sb_2[$r >>  8 & 0xff]) +
-                  $sb_3[$r       & 0xff];
+                  $sb_3[$r       & 0xff]);
         }
         return pack("N*", $r ^ $p[0], $l ^ $p[1]);
     }
@@ -478,6 +474,16 @@ class Blowfish extends Base
             $code_hash = str_pad($code_hash, 32) . $this->_hashInlineCryptFunction($this->key);
         }
 
+        switch (true) {
+            case defined('PHP_INT_SIZE') && PHP_INT_SIZE == 8:
+            case (php_uname('m') & "\xDF\xDF\xDF") != 'ARM':
+                $safeint = '%s';
+                break;
+            default:
+                $safeint = '(is_int($temp = %s) ? $temp : (fmod($temp, 0x80000000) & 0x7FFFFFFF) | ';
+                $safeint.= '((fmod(floor($temp / 0x80000000), 2) & 1) << 31))';
+        }
+
         if (!isset($lambda_functions[$code_hash])) {
             switch (true) {
                 case $gen_hi_opt_code:
@@ -513,16 +519,14 @@ class Blowfish extends Base
             for ($i = 0; $i < 16; $i+= 2) {
                 $encrypt_block.= '
                     $l^= ' . $p[$i] . ';
-                    $r^= ($sb_0[$l >> 24 & 0xff]  +
-                          $sb_1[$l >> 16 & 0xff]  ^
+                    $r^= ' . sprintf($safeint, '(' . sprintf($safeint, '$sb_0[$l >> 24 & 0xff] + $sb_1[$l >> 16 & 0xff]') . ' ^
                           $sb_2[$l >>  8 & 0xff]) +
-                          $sb_3[$l       & 0xff];
+                          $sb_3[$l       & 0xff]') . ';
 
                     $r^= ' . $p[$i + 1] . ';
-                    $l^= ($sb_0[$r >> 24 & 0xff]  +
-                          $sb_1[$r >> 16 & 0xff]  ^
+                    $l^= ' . sprintf($safeint, '(' . sprintf($safeint, '$sb_0[$r >> 24 & 0xff] + $sb_1[$r >> 16 & 0xff]') . '  ^
                           $sb_2[$r >>  8 & 0xff]) +
-                          $sb_3[$r       & 0xff];
+                          $sb_3[$r       & 0xff]') . ';
                 ';
             }
             $encrypt_block.= '
@@ -542,16 +546,14 @@ class Blowfish extends Base
             for ($i = 17; $i > 2; $i-= 2) {
                 $decrypt_block.= '
                     $l^= ' . $p[$i] . ';
-                    $r^= ($sb_0[$l >> 24 & 0xff]  +
-                          $sb_1[$l >> 16 & 0xff]  ^
+                    $r^= ' . sprintf($safeint, '(' . sprintf($safeint, '$sb_0[$l >> 24 & 0xff] + $sb_1[$l >> 16 & 0xff]') . ' ^
                           $sb_2[$l >>  8 & 0xff]) +
-                          $sb_3[$l       & 0xff];
+                          $sb_3[$l       & 0xff]') . ';
 
                     $r^= ' . $p[$i - 1] . ';
-                    $l^= ($sb_0[$r >> 24 & 0xff]  +
-                          $sb_1[$r >> 16 & 0xff]  ^
+                    $l^= ' . sprintf($safeint, '(' . sprintf($safeint, '$sb_0[$r >> 24 & 0xff] + $sb_1[$r >> 16 & 0xff]') . ' ^
                           $sb_2[$r >>  8 & 0xff]) +
-                          $sb_3[$r       & 0xff];
+                          $sb_3[$r       & 0xff]') . ';
                 ';
             }
 
@@ -574,4 +576,25 @@ class Blowfish extends Base
         }
         $this->inline_crypt = $lambda_functions[$code_hash];
     }
+
+    /**
+     * Convert float to int
+     *
+     * On ARM CPUs converting floats to ints doesn't always work
+     *
+     * @access private
+     * @param string $x
+     * @return int
+     */
+    function safe_intval($x)
+    {
+        switch (true) {
+            case is_int($x):
+            // PHP 5.3, per http://php.net/releases/5_3_0.php, introduced "more consistent float rounding"
+            case (php_uname('m') & "\xDF\xDF\xDF") != 'ARM':
+                return $x;
+        }
+        return (fmod($x, 0x80000000) & 0x7FFFFFFF) |
+            ((fmod(floor($x / 0x80000000), 2) & 1) << 31);
+    }
 }
diff --git a/phpseclib/Crypt/Hash.php b/phpseclib/Crypt/Hash.php
index 07665a16..6ae01329 100644
--- a/phpseclib/Crypt/Hash.php
+++ b/phpseclib/Crypt/Hash.php
@@ -802,7 +802,12 @@ class Hash
             $result+= $argument < 0 ? ($argument & 0x7FFFFFFF) + 0x80000000 : $argument;
         }
 
-        return fmod($result, $mod);
+        if ((php_uname('m') & "\xDF\xDF\xDF") != 'ARM') {
+            return fmod($result, $mod);
+        }
+
+        return (fmod($result, 0x80000000) & 0x7FFFFFFF) |
+            ((fmod(floor($result / 0x80000000), 2) & 1) << 31);
     }
 
     /**