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| <head> |
| <title>aput<kind></title> |
| <link rel=stylesheet href="opcode.css"> |
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| <body> |
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| <h1>aput<kind></h1> |
| |
| <h2>Purpose</h2> |
| |
| <p> |
| Waste cycles. |
| </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>4b..51 23x</td> |
| <td><i>arrayop</i> vAA, vBB, vCC<br/> |
| 4b: aput<br/> |
| 4c: aput-wide<br/> |
| 4d: aput-object<br/> |
| 4e: aput-boolean<br/> |
| 4f: aput-byte<br/> |
| 50: aput-char<br/> |
| 51: aput-short |
| </td> |
| <td><code>A:</code> source value register or pair; (8 bits)<br/> |
| <code>B:</code> array register (8 bits)<br/> |
| <code>C:</code> index register (8 bits)</td> |
| </tr> |
| </tbody> |
| </table> |
| |
| <h2>Constraints</h2> |
| |
| <ul> |
| <li> |
| A, B and C must be valid register indices in the current stack frame. |
| </li> |
| <li> |
| For the aget-wide variant, also A+1 must be a valid register index in the |
| current stack frame. |
| </li> |
| <li> |
| Register vB must contain an array reference. The component type of the array |
| must match the variant of the instruction. |
| </li> |
| <li> |
| Register vC must contain an integer value. |
| </li> |
| </ul> |
| |
| <h2>Behavior</h2> |
| |
| <ul> |
| <li> |
| For all but the -wide variant, the value of register vA is move into the |
| array element at the given index, that is, array[index]'=vA. |
| </li> |
| <li> |
| For the -wide variant, the registers vA and v(A+1) are moved into the array |
| element at the given index as follows: |
| <ul> |
| <li> |
| array[index]' = vA << 0x20 | v(A+1) |
| </li> |
| </ul> |
| </li> |
| </ul> |
| |
| <h2>Exceptions</h2> |
| |
| <ul> |
| <li> |
| NullPointerException if vB=null. |
| </li> |
| <li> |
| ArrayIndexOutOfBoundsException if vC < 0 or vC >= array.length. |
| </li> |
| </ul> |
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| </body> |
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