-# RFC ls004 Shift-And-Add
+# RFC ls004 v2 Shift-And-Add and LD/ST-Shifted
* Funded by NLnet under the Privacy and Enhanced Trust Programme, EU
Horizon2020 Grant 825310, and NGI0 Entrust No 101069594
**Status**: New
-**Date**: 31 Oct 2022
+**Date**: 07 Feb 2024
**Target**: v3.2B
sadd - Shift and Add
saddw - Shift and Add Signed Word
sadduw - Shift and Add Unsigned Word
- Also under consideration LD/ST-Indexed-Shifted
+ Also LD/ST-Indexed-Shifted (Fixed and Floating)
```
**Submitter**: Luke Leighton (Libre-SOC)
Power ISA is missing LD/ST Indexed with shift, which is present in both ARM
and x86. Adding more LD/ST is thirty eight instructions, a compromise is to
add shift-and-add. Replaces a pair of explicit instructions in hot-loops.
+Adding actual LD/ST Shifted saves even further.
**Notes and Observations**: