Double対応（？）ただし負の数は上手く挙動しないっぽい

m3m0r7 · m3m0r7 · commit 600c16ab5a52 · 2015-11-04T02:56:20.000+09:00
diff --git a/PHPJava/Statements/JavaStatement_dstore.php b/PHPJava/Statements/JavaStatement_dstore.php
@@ -8,7 +8,9 @@ class JavaStatement_dstore extends JavaStatement {
     public function execute () {
     
         $index = $this->getByteCodeStream()->readUnsignedByte();
-        $this->setLocalstorage($index, $this->getStack());
+        $value = $this->getStack();
+        
+        $this->setLocalstorage($index, BinaryTools::convertDoubleToIEEE754($value));
         
     }
 
diff --git a/PHPJava/Utils/BinaryTools.php b/PHPJava/Utils/BinaryTools.php
@@ -296,5 +296,34 @@ public final static function andBits ($value1, $value2, $bytes) {
         return base_convert($build, 2, 10);
 
     }
+    
+    public final static function convertDoubleToIEEE754 ($doubleValue, $rounded = 8) {
+
+        $doubleValue = base_convert($doubleValue, 10, 2);
+ 
+        $sign = $doubleValue[0];
+        $exponent = substr($doubleValue, 1, 10);
+        $fraction = substr($doubleValue, 11);
+       
+        // double scale
+        $scale = 52;
+        
+        $fractionData = 0;
+        for ($i = 0; $i < 52; $i++) {
+            $fractionData = bcadd($fractionData, bcmul($fraction[$i], bcpow(2, -1 * ($i + 1), $scale), $scale), $scale);
+        }
+        
+        // calc sign
+        $operand1 = -1 * $sign;
+        
+        // calc fraction 
+        $operand2 = bcadd(1, $fractionData, $scale);
+        
+        // calc exponent and bias(?)
+        $operand3 = bcpow(2, bindec($exponent), $scale);
+        
+        return bcmul(-2, bcmul(bcmul($operand1, $operand2, $scale), $operand3, $scale), $rounded);
+        
+    }
 
 }

Original file line number	Diff line number	Diff line change
`@@ -8,7 +8,9 @@ class JavaStatement_dstore extends JavaStatement {`
`8`	`8`	`public function execute () {`
`9`	`9`
`10`	`10`	`$index = $this->getByteCodeStream()->readUnsignedByte();`
`11`		`- $this->setLocalstorage($index, $this->getStack());`
	`11`	`+ $value = $this->getStack();`
	`12`	`+`
	`13`	`+ $this->setLocalstorage($index, BinaryTools::convertDoubleToIEEE754($value));`
`12`	`14`
`13`	`15`	`}`
`14`	`16`