1<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> 2 3<html> 4 5<head> 6<title>binop/lit8</title> 7<link rel=stylesheet href="opcode.css"> 8</head> 9 10<body> 11 12<h1>binop/lit8</h1> 13 14<h2>Purpose</h2> 15 16<p> 17Perform the indicated binary op on the indicated register (first argument) and 18literal value (second argument), storing the result in the destination register. 19</p> 20 21<h2>Details</h2> 22 23<table class="instruc"> 24<thead> 25<tr> 26 <th>Op & Format</th> 27 <th>Mnemonic / Syntax</th> 28 <th>Arguments</th> 29</tr> 30</thead> 31<tbody> 32<tr> 33 <td>d8..e2 22b</td> 34 <td><i>binop</i>/lit8 vAA, vBB, #+CC<br/> 35 d8: add-int/lit8<br/> 36 d9: rsub-int/lit8<br/> 37 da: mul-int/lit8<br/> 38 db: div-int/lit8<br/> 39 dc: rem-int/lit8<br/> 40 dd: and-int/lit8<br/> 41 de: or-int/lit8<br/> 42 df: xor-int/lit8<br/> 43 e0: shl-int/lit8<br/> 44 e1: shr-int/lit8<br/> 45 e2: ushr-int/lit8 46 </td> 47 <td><code>A:</code> destination register (8 bits)<br/> 48 <code>B:</code> source register (8 bits)<br/> 49 <code>C:</code> signed int constant (8 bits)</td> 50</tr> 51</tbody> 52</table> 53 54<h2>Constraints</h2> 55 56<ul> 57 <li> 58 Both A and B must be valid register indices in the current stackframe. 59 </li> 60 <li> 61 Registers vA and vB must be defined. They must both contain integer values. 62 </li> 63 <li> 64 C is an immediate, signed integer constant taken from the instruction stream 65 (actually this means there are no special requirements for C at all). 66 </li> 67</ul> 68 69<h2>Behavior</h2> 70 71<ul> 72 <li> 73 The given operation <binop> is performed according to the semantics 74 specified in table XXX. 75 </li> 76 <li> 77 Argument C is sign-extended to 32 bits before. 78 </li> 79 <li> 80 The result is stored in register vA, that is, vA'=vB <binop> vC. 81 </li> 82 <li> 83 As usual, neighboring registers might get undefined, if vA was part of a 84 register pair originally. 85 </li> 86</ul> 87 88<h2>Exceptions</h2> 89 90<ul> 91 <li> 92 ArithmeticException if an error occurs during the instruction. 93 </li> 94</ul> 95 96</body> 97</html> 98