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BOR
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<code>BOR</code> performs a bitwise OR on <code>arg1</code> with <code>arg2</code> and stores the result in <code>arg1</code>. That is, the bits equal to 1 in either <code>arg1</code> or <code>arg2</code> become 1 in the result; all other bits are set to 0. | <code>BOR</code> performs a bitwise OR on <code>arg1</code> with <code>arg2</code> and stores the result in <code>arg1</code>. That is, the bits equal to 1 in either <code>arg1</code> or <code>arg2</code> become 1 in the result; all other bits are set to 0. | ||
| + | |||
| + | {| class="wikitable" | ||
| + | |+ Truth table for | ||
| + | |+ Y(A, B) = A BOR B | ||
| + | |- | ||
| + | ! Input A !! Input B !! Output Y | ||
| + | |- | ||
| + | | 0 || 0 || 0 | ||
| + | |- | ||
| + | | 0 || 1 || 1 | ||
| + | |- | ||
| + | | 1 || 0 || 1 | ||
| + | |- | ||
| + | | 1 || 1 || 1 | ||
| + | |} | ||
===Signing dependence=== | ===Signing dependence=== | ||
Revision as of 20:13, 13 July 2012
BOR (Bitwise OR) is one of the opcodes in the DCPU-16 specification. It represents a bitwise OR operation.
Contents |
Usage
BOR arg1, arg2
BOR performs a bitwise OR on arg1 with arg2 and stores the result in arg1. That is, the bits equal to 1 in either arg1 or arg2 become 1 in the result; all other bits are set to 0.
| Input A | Input B | Output Y |
|---|---|---|
| 0 | 0 | 0 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 1 |
Signing dependence
BOR works correctly with both signed and unsigned numbers.
Processing
In binary machine code, this Basic opcode's five-bit representation is: 0b0 1011 (0x0b)
The instruction has a takes one cycle to execute, plus any additional cycles necessary to evaluate the arguments.
References
- DCPU-16 specification v1.1 (Copyright 2012 Mojang)
- DCPU-16 specification v1.7 (Copyright 2012 Mojang)
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