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Add operations that are easy to verify #57

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Feb 10, 2021
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Add operations that are easy to verify #57

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22 changes: 22 additions & 0 deletions specs/opcodes.md
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,8 @@
- [EXP: Exponentiate](#exp-exponentiate)
- [EXPI: Exponentiate immediate](#expi-exponentiate-immediate)
- [GT: Greater than](#gt-greater-than)
- [MATHLOG: Math logarithm](#mathlog-math-logarithm)
- [MATHROOT: Math root](#mathroot-math-root)
- [MOD: Modulus](#mod-modulus)
- [MODI: Modulus immediate](#modi-modulus-immediate)
- [MUL: Multiply](#mul-multiply)
Expand Down Expand Up @@ -172,6 +174,26 @@ All these opcodes advance the program counter `$pc` by `4` after performing thei
| Encoding | `0x00 rd rs rt -` |
| Notes | |

### MATHLOG: Math logarithm

| | |
| ----------- | -------------------------------------------- |
| Description | The (integer) logarithm base `$rt` of `$rs`. |
| Operation | ```$rd = math.floor(math.log($rs, $rt));``` |
| Syntax | `mathlog $rd, $rs, $rt` |
| Encoding | `0x00 rd rs rt -` |
| Notes | `$of` is cleared. |

### MATHROOT: Math root

| | |
| ----------- | -------------------------------------------- |
| Description | The (integer) `$rt`th root of `$rs`. |
| Operation | ```$rd = math.floor(math.root($rs, $rt));``` |
| Syntax | `mathroot $rd, $rs, $rt` |
| Encoding | `0x00 rd rs rt -` |
| Notes | `$of` is cleared. |

### MOD: Modulus

| | |
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