From a28a81a155c4e45c6356de3fc3989bb9812ef34c Mon Sep 17 00:00:00 2001
From: lkcl <lkcl@web>
Date: Thu, 3 Oct 2019 14:36:02 +0100
Subject: [PATCH]

---
 simple_v_extension/specification/ld.x.mdwn | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 simple_v_extension/specification/ld.x.mdwn

diff --git a/simple_v_extension/specification/ld.x.mdwn b/simple_v_extension/specification/ld.x.mdwn
new file mode 100644
index 000000000..5ca7683a9
--- /dev/null
+++ b/simple_v_extension/specification/ld.x.mdwn
@@ -0,0 +1,13 @@
+# LD.X and LD.Swizzle
+
+See <http://bugs.libre-riscv.org/show_bug.cgi?id=139>
+
+SV is based on vectorisation of scalar opcodes. LD and ST from scalar RISCV can be extended by either rd or rs1 being vectorised, however a third "immediate element strided" multiples do not fit.
+
+In addition, Vulkan requires swizzled LD/ST covering:
+
+* constant 0, 1
+* min/max int/uint
+* 1.0 and
+* x, y, z, or w.
+
-- 
2.30.2