1 files changed, 13 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_ir_fs.h b/src/mesa/drivers/dri/i965/brw_ir_fs.h
index e8e25b9..84d7d5e 100644
--- a/src/mesa/drivers/dri/i965/brw_ir_fs.h
+++ b/src/mesa/drivers/dri/i965/brw_ir_fs.h
@@ -229,6 +229,19 @@ regions_overlap(const fs_reg &r, unsigned dr, const fs_reg &s, unsigned ds)
 }
 
 /**
+ * Check that the register region given by r [r.offset, r.offset + dr[
+ * is fully contained inside the register region given by s
+ * [s.offset, s.offset + ds[.
+ */
+static inline bool
+region_contained_in(const fs_reg &r, unsigned dr, const fs_reg &s, unsigned ds)
+{
+   return reg_space(r) == reg_space(s) &&
+          reg_offset(r) >= reg_offset(s) &&
+          reg_offset(r) + dr <= reg_offset(s) + ds;
+}
+
+/**
  * Return whether the given register region is n-periodic, i.e. whether the
  * original region remains invariant after shifting it by \p n scalar
  * channels.