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, 1 insertions, 0 deletions

diff --git a/src/gallium/include/pipe/p_shader_tokens.h b/src/gallium/include/pipe/p_shader_tokens.h
index 97deef73830..4e95789c651 100644
--- a/src/gallium/include/pipe/p_shader_tokens.h
+++ b/src/gallium/include/pipe/p_shader_tokens.h
@@ -75,6 +75,7 @@ enum tgsi_file_type {
    TGSI_FILE_BUFFER,
    TGSI_FILE_MEMORY,
    TGSI_FILE_CONSTBUF,
+   TGSI_FILE_HW_ATOMIC,
    TGSI_FILE_COUNT,      /**< how many TGSI_FILE_ types */
 };