From: lkcl <lkcl@web>
Date: Fri, 2 Sep 2022 21:45:24 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: opf_rfc_ls005_v1~724
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1de4a433c79bdecc9e27e7927a7071901d5baff9;p=libreriscv.git

---

diff --git a/openpower/sv/remap/discussion.mdwn b/openpower/sv/remap/discussion.mdwn
index ac81a331b..b80a88a71 100644
--- a/openpower/sv/remap/discussion.mdwn
+++ b/openpower/sv/remap/discussion.mdwn
@@ -1,25 +1,18 @@
 # TODO svshape offset concept
 
-    svshape2 offs,yx,rmm,SVd,sk,mm
+    svshape2 offs,inv,yx,rmm,SVd,sk,mm
 
-| 0.5|6..9 |10|11.15  |16..20 | 21..25 | 25 | 26..31|  name    |
-| -- |---- |--| ---   | ----- | ------ | -- | ------| -------- |
-|OPCD| offs|yx| rmm   | SVd   | 100/mm | sk | XO    | svshape  |
+| 0.5|6..8|9  |10|11.15  |16..20 | 21..25 | 25 | 26..31|  name    |
+| -- |----|---|--| ---   | ----- | ------ | -- | ------| -------- |
+|OPCD|offs|inv|yx| rmm   | SVd   | 100/mm | sk | XO    | svshape  |
 
-* **offs** (4 bits) - unsigned offset
+* **offs** (3 bits) - unsigned offset
 * **yx** (1 bit) - swap XY to YX
+* **inv** (1 bit) inverts X if yx=0, Y if yx=1
 * **SVd** dimension size
 * **rmm** REMAP mask
 * **mm** mask mode
-* **sk** skip
+* **sk** (1 bit) skips 1st dimension if set
 
-| SVRM   | Remap Mode description |
-| ------ | -----------------------|
-| 0b1000 | mm=0 |
-| 0b1001 | mm=1  |
-
-    svindex SVG,rmm,SVd,ew,yx,mr,sk
-
-| 0.5|6.10 |11.15  |16.20 | 21..25      | 26..31|  name    | Form |
-| -- | --  | ---   | ---- | ----------- | ------| -------- | ---- |
-|OPCD| SVG | rmm   | SVd  | ew/yx/mm/sk | XO    | svindex | SVI-Form |
+Dimensions are calculated exactly as `svindex`. `rmm` and
+`mm` are as per `svindex`.