From: lkcl <lkcl@web>
Date: Sat, 25 Sep 2021 04:42:03 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: DRAFT_SVP64_0_1~15
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=54f384770a7965cfae0d49526160481ac70e36a0;p=libreriscv.git

---

diff --git a/3d_gpu/architecture/dynamic_simd/assign.mdwn b/3d_gpu/architecture/dynamic_simd/assign.mdwn
index b168ea446..8c6ae3c0c 100644
--- a/3d_gpu/architecture/dynamic_simd/assign.mdwn
+++ b/3d_gpu/architecture/dynamic_simd/assign.mdwn
@@ -33,3 +33,12 @@ then it matters what the partition settings are:
 
 where square brackets are zero if A is unsigned, and contains
 the specified bits if signed.
+
+When the source A is larger width than B, truncation
+always occurs: it is a matter of how much truncation
+in each partition
+
+    partition:      p    p    p       (3 bits)
+    a        :  AAAA AAAA AAAA AAAA  (16 bits)
+    b        :  B7B6 B5B4 B3B2 B1B0  (8 bits)
+