From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Wed, 21 Sep 2022 14:40:16 +0000 (+0100)
Subject: add SVzd to REMAP (svshape) "stride"
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ad941e4af98defaadfdf3a6b2c78b776d4a15d38;p=openpower-isa.git

add SVzd to REMAP (svshape) "stride"
https://bugs.libre-soc.org/show_bug.cgi?id=930
---

diff --git a/openpower/isa/simplev.mdwn b/openpower/isa/simplev.mdwn
index 111212f8..aa8e692f 100644
--- a/openpower/isa/simplev.mdwn
+++ b/openpower/isa/simplev.mdwn
@@ -155,6 +155,7 @@ Pseudo-code:
         # set up template in SVSHAPE0, then copy to 1-3
         # for FRA and FRT
         SVSHAPE0[0:5] <- (0b0 || SVxd)   # xdim
+        SVSHAPE0[12:17] <- (0b0 || SVzd)   # zdim - "striding" (2D FFT)
         SVSHAPE0[30:31] <- 0b01          # Butterfly mode
         # copy
         SVSHAPE1[0:31] <- SVSHAPE0[0:31]
@@ -179,6 +180,7 @@ Pseudo-code:
         # set up template in SVSHAPE0, then copy to 1-3
         # set up FRB and FRS
         SVSHAPE0[0:5] <- (0b0 || SVxd)   # xdim
+        SVSHAPE0[12:17] <- (0b0 || SVzd)   # zdim - "striding" (2D DCT)
         if (SVrm = 0b1010) | (SVrm = 0b1100) then
             SVSHAPE0[30:31] <- 0b11          # iDCT mode
             SVSHAPE0[18:20] <- 0b011         # iDCT Inner Butterfly sub-mode