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Add part about SETcc instruction family

Kevin Ramharak 2019-06-01 18:05:34 +02:00
parent 5d97d8c3c6
commit c50edcbeac
1 changed files with 23 additions and 1 deletions
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Instruction-Encoding.md

@ -40,3 +40,25 @@ If either the destination or source require a 16-bit immediate value as part of
| Word 0 | Word 1 | Word 2 | | Word 0 | Word 1 | Word 2 |
| --- | --- | --- | | --- | --- | --- |
| Basic Instruction | *Source operand* | *Destination operand* | | Basic Instruction | *Source operand* | *Destination operand* |
## Abstract instructions
As there is a limited amount of opcodes some (abstract) instructions can have an encoding different from the regular format.
### SETcc
The [`SETcc`](http://www.ousob.com/ng/iapx86/ng22d84.php) instruction family is implemented with the single opcode `0x32`. It uses the *Source operand* word to encode its family opcode.
| instruction | family opcode |
| SETA | 0x01 |
| SETAE | 0x02 |
| SETBE | 0x03 |
| SETB | 0x04 |
| SETE | 0x05 |
| SETNE | 0x06 |
| SETG | 0x07 |
| SETGE | 0x08 |
| SETLE | 0x09 |
| SETL | 0x0A |
| SETO | 0x0B |
| SETNO | 0x0C |
| SETS | 0x0D |
| SETNS | 0x0E |