add llvm evl links

diff --git a/3d_gpu/microarchitecture.mdwn b/3d_gpu/microarchitecture.mdwn
index d26d8948478b9e9c3c5e76b2c6489c2b6cbc50c6..c9473f5d5a78512c434938d77932e14a5c6ea158 100644 (file)
--- a/3d_gpu/microarchitecture.mdwn
+++ b/3d_gpu/microarchitecture.mdwn
@@ -798,6 +798,12 @@ costs 2 address comparators to disambiguate this short shadow in the pipeline.
 This is a lower expense than building another read port into the RF, in
 both area and power, and uses the pipeline efficiently.
 
+# Explicit Vector Length (EVL) extension to LLVM <a name="llvm_evl" />
+
+* <https://reviews.llvm.org/D57504>
+* <http://lists.libre-riscv.org/pipermail/libre-riscv-dev/2019-January/000433.html>
+* <http://lists.llvm.org/pipermail/llvm-dev/2019-January/129822.html>
+
 # References
 
 * <https://en.wikipedia.org/wiki/Tomasulo_algorithm>