From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Tue, 27 Jul 2021 16:20:07 +0000 (+0100)
Subject: get DCT shortened table operational
X-Git-Tag: xlen-bcd~195
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1e0a8261dc693f8379d4db88ac7865c7c1a232a8;p=openpower-isa.git

get DCT shortened table operational
---

diff --git a/openpower/isa/simplev.mdwn b/openpower/isa/simplev.mdwn
index 7d70691b..b8b56597 100644
--- a/openpower/isa/simplev.mdwn
+++ b/openpower/isa/simplev.mdwn
@@ -173,12 +173,14 @@ Pseudo-code:
         # copy
         SVSHAPE1[0:31] <- SVSHAPE0[0:31]
         SVSHAPE2[0:31] <- SVSHAPE0[0:31]
-        SVSHAPE3[0:31] <- SVSHAPE0[0:31]
+        if (SVRM != 0b0100) then
+            SVSHAPE3[0:31] <- SVSHAPE0[0:31]
         # for FRA and FRT
         SVSHAPE0[28:29] <- 0b01           # j+halfstep schedule
         # for cos coefficient
-        SVSHAPE2[28:29] <- 0b10           # ci schedule
-        SVSHAPE3[28:29] <- 0b11           # size schedule
+        SVSHAPE2[28:29] <- 0b10           # ci (k for mode 4) schedule
+        if (SVRM != 0b0100) then
+            SVSHAPE3[28:29] <- 0b11           # size schedule
     # set schedule up for DCT Outer butterfly
     if (SVRM = 0b0011) then
         # calculate O(N log2 N) number of outer butterfly overlapping adds
diff --git a/src/openpower/decoder/isa/remap_dct_yield.py b/src/openpower/decoder/isa/remap_dct_yield.py
index 3b2bf64c..4d920558 100644
--- a/src/openpower/decoder/isa/remap_dct_yield.py
+++ b/src/openpower/decoder/isa/remap_dct_yield.py
@@ -108,7 +108,7 @@ def iterate_dct_inner_butterfly_indices(SVSHAPE):
     # get indices to iterate over, in the required order
     n = SVSHAPE.lims[0]
     mode = SVSHAPE.lims[1]
-    print ("inner butterfly", mode)
+    #print ("inner butterfly", mode, SVSHAPE.skip)
     # creating lists of indices to iterate over in each dimension
     # has to be done dynamically, because it depends on the size
     # first, the size-based loop (which can be done statically)