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</title> 7<link rel=stylesheet href="opcode.css"> 8</head> 9 10<body> 11 12<h1>binop</h1> 13 14<h2>Purpose</h2> 15 16<p> 17Perform the identified binary operation on the two source registers, storing 18the result in the first source 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>90..af 23x</td> 34 <td><i>binop</i> vAA, vBB, vCC<br/> 35 90: add-int<br/> 36 91: sub-int<br/> 37 92: mul-int<br/> 38 93: div-int<br/> 39 94: rem-int<br/> 40 95: and-int<br/> 41 96: or-int<br/> 42 97: xor-int<br/> 43 98: shl-int<br/> 44 99: shr-int<br/> 45 9a: ushr-int<br/> 46 9b: add-long<br/> 47 9c: sub-long<br/> 48 9d: mul-long<br/> 49 9e: div-long<br/> 50 9f: rem-long<br/> 51 a0: and-long<br/> 52 a1: or-long<br/> 53 a2: xor-long<br/> 54 a3: shl-long<br/> 55 a4: shr-long<br/> 56 a5: ushr-long<br/> 57 a6: add-float<br/> 58 a7: sub-float<br/> 59 a8: mul-float<br/> 60 a9: div-float<br/> 61 aa: rem-float<br/> 62 ab: add-double<br/> 63 ac: sub-double<br/> 64 ad: mul-double<br/> 65 ae: div-double<br/> 66 af: rem-double 67 </td> 68 <td><code>A:</code> destination register or pair (8 bits)<br/> 69 <code>B:</code> first source register or pair (8 bits)<br/> 70 <code>C:</code> second source register or pair (8 bits)</td> 71</tr> 72</tbody> 73</table> 74 75<h2>Constraints</h2> 76 77<ul> 78 <li> 79 All A, B and C must be valid register indices in the current stackframe. 80 </li> 81 <li> 82 For the -long and -double variants, also A+1, B+1 and C+1 must be valid 83 register indices. 84 </li> 85 <li> 86 Registers vB and vC must be defined. They must both contain values that 87 match the variant of the instruction (it's probably better to split this up 88 into multiple pages again). 89 </li> 90</ul> 91 92<h2>Behavior</h2> 93 94<ul> 95 <li> 96 The given operation <binop> is performed according to the semantics 97 specified in table XXX. 98 </li> 99 <li> 100 The result is stored in register vA, that is, vA'=<biop> vB. 101 </li> 102 <li> 103 For the -double and -long variants, (vA+1) is also affected. 104 </li> 105 <li> 106 As usual, neighboring registers might get undefined, if vA (and vA+1) were 107 part of a register pair originally. 108 </li> 109</ul> 110 111<h2>Exceptions</h2> 112 113<ul> 114 <li> 115 ArithmeticException if an error occurs during the instruction. 116 </li> 117</ul> 118 119</body> 120</html> 121