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| <title>filled-new-array</title> |
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| <h1>filled-new-array</h1> |
| |
| <h2>Purpose</h2> |
| |
| <p> |
| Construct an array of the given type and size, filling it with the supplied |
| contents. The type must be an array type. The array's contents must be |
| single-word (that is, no arrays of long or double). The constructed instance is |
| stored as a "result" in the same way that the method invocation instructions |
| store their results, so the constructed instance must be moved to a register |
| with a subsequent move-result-object instruction (if it is to be used). |
| </p> |
| |
| <h2>Details</h2> |
| |
| <table class="instruc"> |
| <thead> |
| <tr> |
| <th>Op & Format</th> |
| <th>Mnemonic / Syntax</th> |
| <th>Arguments</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td>24 35c</td> |
| <td>filled-new-array {vD, vE, vF, vG, vA}, type@CCCC</td> |
| <td><code>B:</code> array size and argument word count (4 bits)<br/> |
| <code>C:</code> type index (16 bits)<br/> |
| <code>D..G, A:</code> argument registers (4 bits each)</td> |
| </tr> |
| </tbody> |
| </table> |
| |
| <h2>Constraints</h2> |
| |
| <ul> |
| <li> |
| The value B must not be greater than 5. |
| </li> |
| <li> |
| If B > 0, then D must be a valid register index in the current stack frame. |
| </li> |
| <li> |
| If B > 1, then E must be a valid register index in the current stack frame. |
| </li> |
| <li> |
| If B > 2, then F must be a valid register index in the current stack frame. |
| </li> |
| <li> |
| If B > 3, then G must be a valid register index in the current stack frame. |
| </li> |
| <li> |
| If B > 4, then A must be a valid register index in the current stack frame. |
| </li> |
| <li> |
| C must be a valid index into the type pool. |
| </li> |
| <li> |
| The type denoted by C must be a valid array type descriptor. |
| </li> |
| <li> |
| The element size of the type denoted by C must be no larger than 32 bits. |
| </li> |
| <li> |
| If the element type is a primitive type, then all actual arguments |
| (vD .. vA, depending on B) must be primitive, too. |
| </li> |
| <li> |
| If the element type is a reference type, then all actual arguments |
| (vD .. vA, depending on B) must be references, too. |
| </li> |
| </ul> |
| |
| <h2>Behavior</h2> |
| |
| <ul> |
| <li> |
| An attempt is made to get a reference to the type T the name of which is |
| contained in type pool entry C. |
| </li> |
| <li> |
| If T is a reference type and it has not been loaded and resolved before, it |
| is being loaded and resolved. All exceptions that are possible during class |
| loading can occur at this point. |
| </li> |
| <li> |
| An attempt is made to create a new array R of type T and length B. All |
| exceptions that are possible during instantiation can occur at this point. |
| </li> |
| <li> |
| The elements of R are filled according to the following rules: |
| <ul> |
| <li> |
| If B > 0 then R[0] = vD |
| </li> |
| <li> |
| If B > 1 then R[1] = vE |
| </li> |
| <li> |
| If B > 2 then R[2] = vF |
| </li> |
| <li> |
| If B > 3 then R[3] = vG |
| </li> |
| <li> |
| If B > 4 then R[4] = vA |
| </li> |
| </ul> |
| </li> |
| <li> |
| No reference to R is stored in any register. Instead, R can be accessed by a |
| move-result-object instruction immediately following this filled-new-array |
| instruction. |
| </li> |
| </ul> |
| |
| <h2>Exceptions</h2> |
| |
| <ul> |
| <li> |
| NegativeArraySizeException if vB < 0 |
| </li> |
| <li> |
| All exceptions that are possible during class loading can occur. |
| </li> |
| <li> |
| All exceptions that are possible during instantiation can occur. |
| </li> |
| </ul> |
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