add reg rename page

diff --git a/3d_gpu/microarchitecture.mdwn b/3d_gpu/microarchitecture.mdwn
index a1d003763ec50d390cad557e690f8a4a21f4b78d..0387e5563a4858a9658761d1c0516804e543497d 100644 (file)
--- a/3d_gpu/microarchitecture.mdwn
+++ b/3d_gpu/microarchitecture.mdwn
@@ -111,6 +111,8 @@ called the flip-flops orchestrating the timing "collectors".
 
 * <https://en.wikipedia.org/wiki/Tomasulo_algorithm>
 * <https://en.wikipedia.org/wiki/Reservation_station>
+* <https://en.wikipedia.org/wiki/Register_renaming> points out that
+  reservation stations take a *lot* of power.
 * Register File Bank Cacheing <https://www.princeton.edu/~rblee/ELE572Papers/MultiBankRegFile_ISCA2000.pdf>
 * Discussion <http://lists.libre-riscv.org/pipermail/libre-riscv-dev/2018-November/000157.html>
 * <https://github.com/UCSBarchlab/PyRTL/blob/master/examples/example5-instrospection.py>