From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Thu, 23 Jun 2022 16:45:56 +0000 (+0100)
Subject: expand on svstep page
X-Git-Tag: opf_rfc_ls005_v1~1564
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3d977280925f331d9bdf9d2f199bdf6e450eb86d;p=libreriscv.git

expand on svstep page
---

diff --git a/openpower/sv/svstep.mdwn b/openpower/sv/svstep.mdwn
index 95b470c6f..366a6705d 100644
--- a/openpower/sv/svstep.mdwn
+++ b/openpower/sv/svstep.mdwn
@@ -1,8 +1,29 @@
 # svstep
 
-TODO
+(Stub page: TODO, expand)
 
 Links
 
 * [[isa/simplev]]
-* <>
+
+`svstep` performs explicit stepping of the Vector for-loop,
+and it can also be used to enquire about the current state
+of the REMAP indices.
+
+# Format
+
+*(Allocation of opcode TBD pending OPF ISA WG approval)*,
+using EXT22 temporarily and fitting into the
+[[sv/bitmanip]] space
+
+Form: SVL-Form (see [[isatables/fields.text]])
+
+| 0.5|6.10|11.15|16..22| 23...25    | 26.30 |31|  name   |
+| -- | -- | --- | ---- |----------- | ----- |--| ------- |
+|OPCD| RT | /   | SVi  |   /  /  vf | 11011 |Rc| svstep  |
+
+Instruction format:
+
+    svstep RT,SVi,vf
+    svstep. RT,SVi,vf
+