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| author | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 18:28:14 -0800 |
|---|---|---|
| committer | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 18:28:14 -0800 |
| commit | f72d5de56a522ac3be03873bdde26f23a5eeeb3c (patch) | |
| tree | 4b825dc642cb6eb9a060e54bf8d69288fbee4904 /docs/opcodes/opcode-20-instance-of.html | |
| parent | 31e30105703263782efd450d356cd67ea01af3b7 (diff) | |
| download | android_dalvik-f72d5de56a522ac3be03873bdde26f23a5eeeb3c.tar.gz android_dalvik-f72d5de56a522ac3be03873bdde26f23a5eeeb3c.tar.bz2 android_dalvik-f72d5de56a522ac3be03873bdde26f23a5eeeb3c.zip | |
auto import from //depot/cupcake/@135843
Diffstat (limited to 'docs/opcodes/opcode-20-instance-of.html')
| -rw-r--r-- | docs/opcodes/opcode-20-instance-of.html | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/docs/opcodes/opcode-20-instance-of.html b/docs/opcodes/opcode-20-instance-of.html deleted file mode 100644 index 5dbfef7c6..000000000 --- a/docs/opcodes/opcode-20-instance-of.html +++ /dev/null @@ -1,100 +0,0 @@ -<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> - -<html> - -<head> -<title>instance-of</title> -<link rel=stylesheet href="opcode.css"> -</head> - -<body> - -<h1>instance-of</h1> - -<h2>Purpose</h2> - -<p> -Store in the given destination register 1 if the indicated reference is an -instance of the given type, or 0 if not. The type must be a reference type (not -a primitive type). -</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>20 22c</td> - <td>instance-of vA, vB, type@CCCC</td> - <td><code>A:</code> destination register (4 bits)<br/> - <code>B:</code> reference-bearing register (4 bits)<br/> - <code>C:</code> type index (16 bits)</td> -</tr> -</tbody> -</table> - -<h2>Constraints</h2> - -<ul> - <li> - Both A and B must be a valid register indices for the current stack frame. - </li> - <li> - Register vB must contain a reference value. - </li> - <li> - C must be a valid index into the type constant pool. - </li> - <li> - Type constant pool entry C must contain a valid type descriptor for a - reference type. - </li> -</ul> - -<h2>Behavior</h2> - -<ul> - <li> - An attempt is made to get a reference to the class K the name of which is - contained in type pool entry C. - </li> - <li> - If K has not been loaded and resolved before, it is being loaded and - resolved. All exceptions that are possible during class loading can occur at - this point. - </li> - <li> - The run-time type of the object reference vB is compared against K. The - register vA reflects the result: - <ul> - <li> - vA' = 1 if (and only if) vB is not null and vB is assignment compatible - with K according to the usual rules of the Java programming language. - </li> - <li> - vA' = 0 otherwise - </li> - </ul> - </li> - <li> - If v(A-1) is the lower half of a register pair, v(A-1)' becomes undefined. - </li> - <li> - If v(A+1) is the upper half of a register pair, v(A+1)' becomes undefined. - </li> - -<h2>Exceptions</h2> - -<p> -None. -</p> - -</body> -</html> |