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| <title>binop/lit8</title> |
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| <h1>binop/lit8</h1> |
| |
| <h2>Purpose</h2> |
| |
| <p> |
| Perform the indicated binary op on the indicated register (first argument) and |
| literal value (second argument), storing the result in the destination register. |
| </p> |
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| <h2>Details</h2> |
| |
| <table class="instruc"> |
| <thead> |
| <tr> |
| <th>Op & Format</th> |
| <th>Mnemonic / Syntax</th> |
| <th>Arguments</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td>d8..e2 22b</td> |
| <td><i>binop</i>/lit8 vAA, vBB, #+CC<br/> |
| d8: add-int/lit8<br/> |
| d9: rsub-int/lit8<br/> |
| da: mul-int/lit8<br/> |
| db: div-int/lit8<br/> |
| dc: rem-int/lit8<br/> |
| dd: and-int/lit8<br/> |
| de: or-int/lit8<br/> |
| df: xor-int/lit8<br/> |
| e0: shl-int/lit8<br/> |
| e1: shr-int/lit8<br/> |
| e2: ushr-int/lit8 |
| </td> |
| <td><code>A:</code> destination register (8 bits)<br/> |
| <code>B:</code> source register (8 bits)<br/> |
| <code>C:</code> signed int constant (8 bits)</td> |
| </tr> |
| </tbody> |
| </table> |
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| <h2>Constraints</h2> |
| |
| <ul> |
| <li> |
| Both A and B must be valid register indices in the current stackframe. |
| </li> |
| <li> |
| Registers vA and vB must be defined. They must both contain integer values. |
| </li> |
| <li> |
| C is an immediate, signed integer constant taken from the instruction stream |
| (actually this means there are no special requirements for C at all). |
| </li> |
| </ul> |
| |
| <h2>Behavior</h2> |
| |
| <ul> |
| <li> |
| The given operation <binop> is performed according to the semantics |
| specified in table XXX. |
| </li> |
| <li> |
| Argument C is sign-extended to 32 bits before. |
| </li> |
| <li> |
| The result is stored in register vA, that is, vA'=vB <binop> vC. |
| </li> |
| <li> |
| As usual, neighboring registers might get undefined, if vA was part of a |
| register pair originally. |
| </li> |
| </ul> |
| |
| <h2>Exceptions</h2> |
| |
| <ul> |
| <li> |
| ArithmeticException if an error occurs during the instruction. |
| </li> |
| </ul> |
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