From: lkcl <lkcl@web>
Date: Thu, 23 Jun 2022 19:49:56 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: opf_rfc_ls005_v1~1558
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=efdce9980d8657ac20e22baa094d1ae9980f34de;p=libreriscv.git

---

diff --git a/openpower/sv/svstep.mdwn b/openpower/sv/svstep.mdwn
index 2ccae5d7f..99c2b10f8 100644
--- a/openpower/sv/svstep.mdwn
+++ b/openpower/sv/svstep.mdwn
@@ -28,7 +28,7 @@ Instruction format:
     svstep. RT,SVi,vf (Rc=1)
 
 When `vf=1` then stepping occurs. When `vf=0` svstep may be used
-to enquire about the REMAP Schedule state, without altering internal
+to enquire about the REMAP Schedule, without altering internal
 state.  If `SVi=0, Rc=0, vf=0` this instruction is a `nop`.
 
 When `SVi` is 1-4 the REMAP Schedule for a given SVSHAPE  may be
@@ -38,10 +38,15 @@ through to SVi=4 selects SVSHAPE3.
 To obtain the full set of possible computed element
 indices use `svstep RT.v,SVI,1` which will store all computed element
 indices, starting from RT.  If Rc=1 then a co-result Vector of CR Fields
-will also be returned, comprising the "end-points" of each of the inner
+will also be returned, comprising the "loop end-points" of each of the inner
 loops when either Matrix Mode or DCT/FFT is set.  In other words,
 for example, when the `xdim` inner loop reaches the end and on the next
 iteration it will begin again at zero, the CR Field `EQ` will be set.
+With a maximum of three loops within both Matrix and DCT/FFT Modes,
+the CR Field's EQ bit will be set at the end of the first inner loop,
+the LE bit for the second, the GT bit for the outermost loop and the
+SO bit set on the very last element, when all loops reach their maximum
+extent.
 
 *Programmer's note (1): VL in some situations, particularly larger Matrices,
 may exceed 64,