From: lkcl <lkcl@web>
Date: Sat, 11 Jun 2022 10:45:51 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: opf_rfc_ls005_v1~1853
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7bcdb8c5bbf9d3bedb9095601e6111c9ec232b52;p=libreriscv.git

---

diff --git a/openpower/sv/mv.swizzle.mdwn b/openpower/sv/mv.swizzle.mdwn
index a265a2a29..a491bccb1 100644
--- a/openpower/sv/mv.swizzle.mdwn
+++ b/openpower/sv/mv.swizzle.mdwn
@@ -35,3 +35,18 @@ Evaluating efforts to encode 12 bit swizzle into less proved unsuccessful: 7^4 c
 Note that 7 options are needed (not 6) because the 7th option allows predicate masking to be encoded within the swizzle immediate.
 For example this allows "W..Y" to be specified, "copy W to position X,
 and Y to position W, leave the other two positions Y and Z unaltered"
+
+# RM Mode Concept:
+
+MVRM-2P-2S1D:
+
+| Field Name | Field bits | Description                     |
+|------------|------------|----------------------------|
+| Rdest_EXTRA2 | `10:11`  | extends Rdest (R\*\_EXTRA2 Encoding)   |
+| Rsrc_EXTRA2  | `12:13`  | extends Rsrc  (R\*\_EXTRA2 Encoding)   |
+| src_SUBVL    | `14:15`  | SUBVL for Source              |
+| MASK_SRC     | `16:18`  | Execution Mask for Source     |
+
+The inclusion of a separate src SUBVL would allow either
+`sv.mv.swiz RT.vecN RA.vecN` to mean contiguous sequential copy
+or it could mean zip/unzip (pack/unpack).