From: lkcl <lkcl@web>
Date: Sat, 25 Mar 2023 19:33:49 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: opf_rfc_ls001_v3~69
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=988e876dff5fb08350b2c1c75e34b9081e6026fd;p=libreriscv.git

---

diff --git a/openpower/sv/rfc/ls008.mdwn b/openpower/sv/rfc/ls008.mdwn
index f7f11ddb8..a5cda55ea 100644
--- a/openpower/sv/rfc/ls008.mdwn
+++ b/openpower/sv/rfc/ls008.mdwn
@@ -171,6 +171,41 @@ Special Registers Altered:
 
 \newpage{}
 
+# SVSTATE SPR
+
+The format of the SVSTATE SPR is as follows:
+
+| Field | Name     | Description           |
+| ----- | -------- | --------------------- |
+| 0:6   | maxvl    | Max Vector Length     |
+| 7:13  |    vl    | Vector Length         |
+| 14:20 | srcstep  | for srcstep = 0..VL-1 |
+| 21:27 | dststep  | for dststep = 0..VL-1 |
+| 28:29 | dsubstep | for substep = 0..SUBVL-1  |
+| 30:31 | ssubstep | for substep = 0..SUBVL-1  |
+| 32:33 | mi0      | REMAP RA SVSHAPE0-3    |
+| 34:35 | mi1      | REMAP RB SVSHAPE0-3    |
+| 36:37 | mi2      | REMAP RC SVSHAPE0-3    |
+| 38:39 | mo0      | REMAP RT SVSHAPE0-3    |
+| 40:41 | mo1      | REMAP EA SVSHAPE0-3    |
+| 42:46 | SVme     | REMAP enable (RA-RT)  |
+| 47:52 | rsvd     | reserved              |
+| 53    | pack     | PACK (srcstrp reorder)  |
+| 54    | unpack   | UNPACK (dststep order)  |
+| 55:61 | hphint   | Horizontal Hint       |
+| 62    | RMpst    | REMAP persistence     |
+| 63    | vfirst   | Vertical First mode   |
+
+Notes:
+
+* The entries are truncated to be within range.  Attempts to set VL to
+  greater than MAXVL will truncate VL.
+* Setting srcstep, dststep to 64 or greater, or VL or MVL to greater
+  than 64 is reserved and will cause an illegal instruction trap.
+
+-------------
+
+\newpage{}
 
 # SVL-Form
 
@@ -191,18 +226,18 @@ Add the following to Book I, 1.6.2
 
 ```
     ms (23)
-        Field used in Simple-V to specify whether MVL (MAXVL in the SVSTATE SPR)
+        Field used in Simple-V to specify whether MVL (maxvl in the SVSTATE SPR)
         is to be set
         Formats: SVL
     vf (25)
         Field used in Simple-V to specify whether "Vertical" Mode is set
-        (VF in the SVSTATE SPR)
+        (vfirst in the SVSTATE SPR)
         Formats: SVL
     vs (24)
-        Field used in Simple-V to specify whether VL (in the SVSTATE SPR) is to be set
+        Field used in Simple-V to specify whether VL (vl in the SVSTATE SPR) is to be set
         Formats: SVL
     SVi (16:22)
-         Simple-V immediate field for setting VL or MVL (VL, MAXVL in the SVSTATE SPR)
+         Simple-V immediate field for setting VL or MVL (vl, maxvl in the SVSTATE SPR)
          Formats: SVL
 ```