From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Tue, 6 Jul 2021 20:15:02 +0000 (+0100)
Subject: change coefficients in FFT REMAP example so as not to get alternating zeros
X-Git-Tag: xlen-bcd~333
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a6985c7fd3085190365438f99d72e9a940a61cfd;p=openpower-isa.git

change coefficients in FFT REMAP example so as not to get alternating zeros
---

diff --git a/src/openpower/decoder/isa/test_caller_svp64_fft.py b/src/openpower/decoder/isa/test_caller_svp64_fft.py
index adbdfd43..fe7c7f6d 100644
--- a/src/openpower/decoder/isa/test_caller_svp64_fft.py
+++ b/src/openpower/decoder/isa/test_caller_svp64_fft.py
@@ -97,25 +97,23 @@ class DecoderTestCase(FHDLTestCase):
                 fnmsubs FRT+vl, FRA, FRC, FRB+vl
         """
         lst = SVP64Asm( ["svremap 8, 1, 1, 1",
-                        "sv.ffmadds 2.v, 2.v, 2.v, 10.v"
+                        "sv.ffmadds 0.v, 0.v, 0.v, 8.v"
                         ])
         lst = list(lst)
 
         fprs = [0] * 32
-        av = [7.0, -9.8, 2.0, -32.3,
-              -2.0, 2.0, -9.8, 32.3] # array 0..7
-        coe = [-1.0, 4.0, 3.1, 6.2] # coefficients
+        av = [7.0, -9.8, 3.0, -32.3,
+              -2.0, 5.0, -9.8, 31.3] # array 0..7
+        coe = [-0.25, 0.5, 3.1, 6.2] # coefficients
         # store in regfile
         for i, c in enumerate(coe):
-            fprs[i+10] = fp64toselectable(c)
+            fprs[i+8] = fp64toselectable(c)
         for i, a in enumerate(av):
-            fprs[i+2] = fp64toselectable(a)
+            fprs[i+0] = fp64toselectable(a)
         # work out the results with the twin mul/add-sub
         res = []
         for i, (a, c) in enumerate(zip(av, coe)):
             continue
-            fprs[i+2] = fp64toselectable(a)
-            fprs[i+10] = fp64toselectable(c)
             mul = a * c
             t = a + mul
             u = b - mul