# [DRAFT] Integer Butterfly Multiply Add/Sub FFT/DCT
-DCTI-Form
+A-Form
* maddsubrs RT,RA,RB,SH
None
```
-Where DCTI-Form is defined in fields.txt:
+Where we have added this variant in A-Form (defined in fields.txt):
```
-# 1.6.7.2 DCTI-FORM
- |0 | 6 |11 |16 |21 |25 |31 |
- | PO | RT | RA | RB | SH | XO | Rc |
+# # 1.6.17 A-FORM
+ |0 |6 |11 |16 |21 |26 |31 |
+ ...
+ | PO | RT | RA | RB | SH | XO |Rc |
```
The instruction has been added to `minor_22.csv`:
```
-------01000,ALU,OP_MADDSUBRS,RT,CONST_UI,RB,RT,NONE,CR0,0,0,ZERO,0,NONE,0,0,0,0,1,0,RC_ONLY,0,0,maddsubrs,DCTI,,1,unofficial until submitted and approved/renumbered by the opf isa wg
+------01000,ALU,OP_MADDSUBRS,RT,CONST_SH,RB,RT,NONE,CR0,0,0,ZERO,0,NONE,0,0,0,0,1,0,RC_ONLY,0,0,maddsubrs,A,,1,unofficial until submitted and approved/renumbered by the opf isa wg
```