gallium/tgsi: start adding hw atomics (v3.2)

This adds support for a hw atomic counters to TGSI.

A new register file for storing atomic counters is added,
along with a new atomic counter semantic, along with docs
for both.

v2: drop semantic, move hw counter to backend,
Ilia pointed out SSO would have busted my plan, and he
was right.
v3: drop BUFFER decls. (Marek)
v3.1: minor fixups for whitespace, set ureg error
if we overflow the hw atomic limits. (nha)
v3.2: fix some docs inconsistencies (Ilia)

Reviewed-by: Marek Olšák <[email protected]>
Reviewed-by: Nicolai Hähnle <[email protected]>
Tested-By: Gert Wollny <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/tgsi/tgsi_ureg.h b/src/gallium/auxiliary/tgsi/tgsi_ureg.h
index e88c2c19c36..96aef25aedb 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_ureg.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_ureg.h
@@ -316,6 +316,13 @@ struct ureg_src
 ureg_DECL_constant( struct ureg_program *,
                     unsigned index );
 
+void
+ureg_DECL_hw_atomic(struct ureg_program *ureg,
+                    unsigned first,
+                    unsigned last,
+                    unsigned buffer_id,
+                    unsigned array_id);
+
 struct ureg_dst
 ureg_DECL_temporary( struct ureg_program * );