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| <head> |
| <title>goto/16</title> |
| <link rel=stylesheet href="opcode.css"> |
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| <body> |
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| <h1>goto/16</h1> |
| |
| <h2>Purpose</h2> |
| |
| <p> |
| Unconditionally jump to the indicated instruction. |
| </p> |
| <p> |
| Note: The branch offset may not be 0. (A spin loop may be legally constructed |
| either with goto/32 or by including a nop as a target before the branch.) |
| </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>29 20t</td> |
| <td>goto/16 +AAAA</td> |
| <td><code>A:</code> signed branch offset (16 bits)<br/></td> |
| </tr> |
| </tbody> |
| </table> |
| |
| <h2>Constraints</h2> |
| |
| <ul> |
| <li> |
| A must point to a valid bytecode instruction inside the current method. |
| </li> |
| <li> |
| A must not be 0. |
| </li> |
| </ul> |
| |
| <h2>Behavior</h2> |
| |
| <ul> |
| <li> |
| The (otherwise invisible) program counter PC is set to the address of the |
| instruction plus the given offset, that is, PC' = PC(goto) + A. |
| </li> |
| <li> |
| Executions resumes at PC'. |
| </li> |
| </ul> |
| |
| <h2>Exceptions</h2> |
| |
| <p> |
| None. |
| </p> |
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