add RVV spec link

diff --git a/3d_gpu.mdwn b/3d_gpu.mdwn
index 5ac25349c67822d4b8b6bf0fcb4d98d937e02059..a35d09b79cf147a7e5e1dc1ff7a27a0f036e8a12 100644 (file)
--- a/3d_gpu.mdwn
+++ b/3d_gpu.mdwn
@@ -94,7 +94,9 @@ single-instruction "memcpy" and "memzero") - the primary driver behind
 Simple-V has been as the basis for turning RISC-V into an
 embedded-style (low-power) GPU (and also a VPU).
 
-one of the things that's lacking from RVV is parallelisation of
+one of the things that's lacking from
+[RVV](https://github.com/riscv/riscv-v-spec/blob/master/v-spec.adoc)
+is parallelisation of
 Bit-Manipulation.  RVV has been primarily designed based on input from
 the Supercomputer community, and as such it's *incredible*.
 absolutely amazing... but only desirable to implementt if you need to