[Mesa-dev] [PATCH 2/8] gallium: add PIPE_CAP_TGSI_ATOMFADD to indicate support

[Ilia Mirkin]

ATOMFADD is a little special -- make drivers have to specify it
explicitly.

Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
---
 src/gallium/auxiliary/util/u_screen.c | 1 +
 src/gallium/docs/source/screen.rst    | 2 ++
 src/gallium/include/pipe/p_defines.h  | 1 +
 3 files changed, 4 insertions(+)

diff --git a/src/gallium/auxiliary/util/u_screen.c b/src/gallium/auxiliary/util/u_screen.c
index 73dbbee94a9..a9ce3c2d871 100644
--- a/src/gallium/auxiliary/util/u_screen.c
+++ b/src/gallium/auxiliary/util/u_screen.c
@@ -311,6 +311,7 @@ u_pipe_screen_get_param_defaults(struct pipe_screen *pscreen,
    case PIPE_CAP_MAX_COMBINED_SHADER_BUFFERS:
    case PIPE_CAP_MAX_COMBINED_HW_ATOMIC_COUNTERS:
    case PIPE_CAP_MAX_COMBINED_HW_ATOMIC_COUNTER_BUFFERS:
+   case PIPE_CAP_TGSI_ATOMFADD:
       return 0;
 
    case PIPE_CAP_MAX_GS_INVOCATIONS:
diff --git a/src/gallium/docs/source/screen.rst b/src/gallium/docs/source/screen.rst
index 0abd164494c..657b04c7a5c 100644
--- a/src/gallium/docs/source/screen.rst
+++ b/src/gallium/docs/source/screen.rst
@@ -477,6 +477,8 @@ subpixel precision bias in bits during conservative rasterization.
   0 means no limit.
 * ``PIPE_CAP_MAX_VERTEX_ELEMENT_SRC_OFFSET``: The maximum supported value for
   of pipe_vertex_element::src_offset.
+* ``PIPE_CAP_TGSI_ATOMFADD``: Atomic floating point adds are supported on
+  images, buffers, and shared memory.
 
 .. _pipe_capf:
 
diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index e99895d30d8..0660e641b06 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -832,6 +832,7 @@ enum pipe_cap
    PIPE_CAP_MAX_COMBINED_HW_ATOMIC_COUNTER_BUFFERS,
    PIPE_CAP_MAX_TEXTURE_UPLOAD_MEMORY_BUDGET,
    PIPE_CAP_MAX_VERTEX_ELEMENT_SRC_OFFSET,
+   PIPE_CAP_TGSI_ATOMFADD,
 };
 
 /**
-- 
2.18.1