gallium: Add a cap bit for OpenCL-style extended integer functions

Iris will eventually enable this.  Looking at the header files, it looks
like Midgard could also enable it.  Basically, any GPU that fully
supports OpenCL can.

v2: Add default value to u_screen.c.  Suggested by Caio.

Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/767>

diff --git a/src/gallium/auxiliary/util/u_screen.c b/src/gallium/auxiliary/util/u_screen.c
index 70eb4a27d748317ee5f0733a0f6388d97f7be1f6..5a7790b75dea5ee61cae0c793a29c7e50dd9e515 100644 (file)
--- a/src/gallium/auxiliary/util/u_screen.c
+++ b/src/gallium/auxiliary/util/u_screen.c
@@ -404,6 +404,9 @@ u_pipe_screen_get_param_defaults(struct pipe_screen *pscreen,
    case PIPE_CAP_MAX_VERTEX_BUFFERS:
       return 16;
 
+   case PIPE_CAP_OPENCL_INTEGER_FUNCTIONS:
+      return 0;
+
    default:
       unreachable("bad PIPE_CAP_*");
    }

diff --git a/src/gallium/docs/source/screen.rst b/src/gallium/docs/source/screen.rst
index 7e6964282f59eeb360c616b1702b381718223f22..a0149cf6994f0021ea3366a988473a3c45591a8e 100644 (file)
--- a/src/gallium/docs/source/screen.rst
+++ b/src/gallium/docs/source/screen.rst
@@ -565,6 +565,7 @@ The integer capabilities:
 * ``PIPE_CAP_TWO_SIDED_COLOR``: Driver supports two-sided coloring.
 * ``PIPE_CAP_CLIP_PLANES``: Driver supports user-defined clip-planes.
 * ``PIPE_CAP_MAX_VERTEX_BUFFERS``: Number of supported vertex buffers.
+* ``PIPE_CAP_OPENCL_INTEGER_FUNCTIONS``: Driver supports extended OpenCL-style integer functions.  This includes averge, saturating additiong, saturating subtraction, absolute difference, count leading zeros, and count trailing zeros.
 
 .. _pipe_capf:
 

diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index 76afb5a311c549dedd6b2bdb45a01861c6328cd2..3599b7713471c55f5c450d5c9a58a8445d32853d 100644 (file)
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -910,6 +910,7 @@ enum pipe_cap
    PIPE_CAP_TWO_SIDED_COLOR,
    PIPE_CAP_CLIP_PLANES,
    PIPE_CAP_MAX_VERTEX_BUFFERS,
+   PIPE_CAP_OPENCL_INTEGER_FUNCTIONS,
 };
 
 /**