From e93aa4da04313aadc078ba245bc48392841a256b Mon Sep 17 00:00:00 2001
From: lkcl <lkcl@web>
Date: Mon, 7 Oct 2019 09:56:23 +0100
Subject: [PATCH]

---
 simple_v_extension/specification/mv.x.rst | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/simple_v_extension/specification/mv.x.rst b/simple_v_extension/specification/mv.x.rst
index ce75de220..332892f8e 100644
--- a/simple_v_extension/specification/mv.x.rst
+++ b/simple_v_extension/specification/mv.x.rst
@@ -221,6 +221,17 @@ Matrix 4x4 Vector mul
 
 pfscale is a 4 vec mv.shuffle followed by a fmul. pfscaleadd is a 4 vec mv.shuffle followed by a fmac.
 
+In effect what this is doing is:
+
+::
+
+    fmul f2, f1.xxxx, f10
+    fmac f2, f1.yyyy, f11, f2
+    fmac f2, f1.zzzz, f12, f2
+    fmac f2, f1.wwww, f13, f2
+
+Where all of f2, f1, and f10-13 are vec4
+
 Pseudocode
 ==========
 
-- 
2.30.2