[Mesa-dev] [PATCH] intel/compiler: Add a file-level description of brw_eu_validate.c

[Matt Turner]

---
 src/intel/compiler/brw_eu_validate.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/intel/compiler/brw_eu_validate.c b/src/intel/compiler/brw_eu_validate.c
index a25010b225c..7f1580a5bb3 100644
--- a/src/intel/compiler/brw_eu_validate.c
+++ b/src/intel/compiler/brw_eu_validate.c
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2015 Intel Corporation
+ * Copyright © 2015-2019 Intel Corporation
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -24,6 +24,18 @@
 /** @file brw_eu_validate.c
  *
  * This file implements a pass that validates shader assembly.
+ *
+ * The restrictions implemented herein are intended to verify that instructions
+ * in shader assembly do not violate restrictions documented in the graphics
+ * programming reference manuals.
+ *
+ * The restrictions are difficult for humans to quickly verify due to their
+ * complexity and abundance.
+ *
+ * It is critical that this code is thoroughly unit tested because false
+ * results it will lead developers astray, which is worse than having no
+ * validator at all. Patches to this file without corresponding unit tests (in
+ * test_eu_validate.cpp) will be rejected.
  */
 
 #include "brw_eu.h"
-- 
2.19.2