From: mtnolan2640@5b3e5887a309d4a2372aaf5e76b851870f15ca92 <mtnolan2640@web>
Date: Wed, 12 Feb 2020 19:22:42 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: convert-csv-opcode-to-binary~3441
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=fb711ffff7381d6b99906182ef45c3efdb0d002e;p=libreriscv.git

---

diff --git a/3d_gpu/architecture/dynamic_simd/shift.mdwn b/3d_gpu/architecture/dynamic_simd/shift.mdwn
index b4a3419ce..2b28d6f5d 100644
--- a/3d_gpu/architecture/dynamic_simd/shift.mdwn
+++ b/3d_gpu/architecture/dynamic_simd/shift.mdwn
@@ -12,9 +12,9 @@ QUESTION: should b1 be limited to min(b[8+4..8], 24), b2 be similarly limited to
 then, we compute the following matrix, with the first column output being the full width (32 bit), the second being only 24 bit, the third only 16 bit and finally the top part (comprising the most significant byte of a and b as input) being only 8 bit
 
     | a0 << b0 | a1 << b0 | a2 << b0 | a3 << b0
-    | a0 << b1 | a1 << b1 | a2 << b1 | a3 << b1
-    | a0 << b2 | a1 << b2 | a2 << b2 | a3 << b2
-    | a0 << b3 | a1 << b3 | a2 << b3 | a3 << b3
+    |          | a1 << b1 | a2 << b1 | a3 << b1
+    |          |          | a2 << b2 | a3 << b2
+    |          |          |          | a3 << b3
 
 Where multiply would perform a cascading-add across those partial results,
 shift is different in that we *know* (assume) that for each shift-amount