This patch modifies the special case in
fs_visitor::split_virtual_grfs() that prevents splitting from being
applied to the delta_x/delta_y register pair (this register pair needs
to remain contiguous so that it can be used by the PLN instruction).
When gen>=6, this register pair is in a fixed location, not a virtual
register, so it was in no danger of being split. And
split_virtual_grfs' attempt not to split it was preventing some other
unrelated register from being split.
---
src/mesa/drivers/dri/i965/brw_fs.cpp | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp
b/src/mesa/drivers/dri/i965/brw_fs.cpp
index c0d93c0..3848915 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -768,7 +768,7 @@ fs_visitor::split_virtual_grfs()
split_grf[i] = false;
}
- if (brw->has_pln) {
+ if (brw->has_pln && this->delta_x.file == GRF) {
/* PLN opcodes rely on the delta_xy being contiguous. */
split_grf[this->delta_x.reg] = false;
}
--
1.7.6.4
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/mesa-dev
