# mv.swizzle

TODO: evaluate whether this will fit with [[mv.vec]]

# Format

| 0.5 |6.10|11.15|16.20|21.....25|26.....30|31|  name        |
|-----|----|-----|-----|---------|---------|--|--------------|
| 19  | RT | RA  |     | XO[0:4] | XO[5:9] |Rc| XL-Form      |
| 19  | RT | RA  |imm  | imm     | 01 M im |0 | mv.vec.swiz  |
| 19  | RT | RA  |imm  | imm     | 01 M im |1 | fmv.vec.swiz |
| 19  | RT | RA  |imm  | imm     | 11 0 im |0 | mv.swiz      |
| 19  | RT | RA  |imm  | imm     | 11 0 im |1 | fmv.swiz     |

this gives a 12 bit immediate across bits 16 to 25 and 29-30.

* 3 bits X
* 3 bits Y
* 3 bits Z
* 3 bits W

except that the options are:

* 0b1NN index 0 thru 3 to place subelement in pos XYZW
* 0b000 to indicate "skip"
* 0b001 to indicate "constant 0"
* 0b010 to indicate "constant 1" (or 1.0)
* 0b011 is not needed.

Evaluating efforts to encode 12 bit swizzle into less proved unsuccessful: 7^4 wcomes out to 2,400 which is larger than 11 bits

Mode M is described in [[mv.vec]]