add packed simd reference

diff --git a/shakti/m_class.mdwn b/shakti/m_class.mdwn
index 96af452ce4030088970483f6d620cee07914c060..78d80bdbda42b7f20870352f244a43d45459a8a0 100644 (file)
--- a/shakti/m_class.mdwn
+++ b/shakti/m_class.mdwn
@@ -357,6 +357,7 @@ many more.
 * Bit-reverse <http://programming.sirrida.de/bit_perm.html#general_reverse_bits>
 * Bit-permutations <http://programming.sirrida.de/bit_perm.html#c_e>
 * Commentary on Micro-controller <https://github.com/emb-riscv/specs-markdown/blob/develop/improvements-upon-privileged.md>
+* P-SIMD <https://groups.google.com/a/groups.riscv.org/forum/#!topic/isa-dev/vYVi95gF2Mo>
 
 >
 [[!tag cpus]]