From: lkcl <lkcl@web>
Date: Sat, 23 Oct 2021 22:08:13 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: opf_rfc_ls005_v1~3540
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3c41aeee61c360d68f13688fc982001799c5347e;p=libreriscv.git

---

diff --git a/3d_gpu/architecture/dynamic_simd/slice.mdwn b/3d_gpu/architecture/dynamic_simd/slice.mdwn
index 86f00cbfa..fc12b86b4 100644
--- a/3d_gpu/architecture/dynamic_simd/slice.mdwn
+++ b/3d_gpu/architecture/dynamic_simd/slice.mdwn
@@ -237,6 +237,14 @@ entirety of the partition (overall fixed width):
     0b01  B7B6 B5B4|B3B2 B1B0
     0b10  B7B6|B5B4|B3B2|B1B0
 
-This gwts interesting. First, the simpler case: Cat() with a 3-bit slice.
+This gets interesting. First, the simpler case: Cat() with a 3-bit slice.
 The end result (assuming `Cat(a[0:3], b)`) is:
 
+* one 11-bit result for elwid=0b00
+* two 7-bit results for elwid=0b01
+* four 5-bit results for elwid=0b10
+
+    elwid       |    |        |  |      |    |   
+    0b00                      |B7 B6B5B4 B3B2 B1B0A2A1A0
+    0b01        |B7B6 B5B4AaA9 A8|       B3B2 B1B0A2A1A0
+    0b10  B7B6Ae AdAc|B5B4AaA9 A8|B3B2A6 A5A4|B1B0A2A1A0