i965: Cite the Ivybridge PRM for why the fake MRF range is what it is.

The exact text is in the public docs, so we should cite those.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>

diff --git a/src/mesa/drivers/dri/i965/brw_eu_emit.c b/src/mesa/drivers/dri/i965/brw_eu_emit.c
index cecabc051346bcacaae999fa0c67d624d07fb204..204cea2437e1ffce5e4fdbced46c2d174d0d7d27 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_eu_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c
@@ -84,7 +84,7 @@ gen6_resolve_implied_move(struct brw_compile *p,
 static void
 gen7_convert_mrf_to_grf(struct brw_compile *p, struct brw_reg *reg)
 {
-   /* From the BSpec / ISA Reference / send - [DevIVB+]:
+   /* From the Ivybridge PRM, Volume 4 Part 3, page 218 ("send"):
     * "The send with EOT should use register space R112-R127 for <src>. This is
     *  to enable loading of a new thread into the same slot while the message
     *  with EOT for current thread is pending dispatch."