[Mesa-dev] [PATCH v3 13/13] gallium/compute: Drop TGSI dependency.

[Francisco Jerez]

Add a shader cap for specifying the preferred shader representation.
Right now the only supported value is TGSI, other enum values will be
added as they are needed.

This is mainly to accommodate AMD's LLVM compiler back-end by letting
it bypass the TGSI representation for compute programs.  Other drivers
will keep using the common TGSI instruction set.

Reviewed-by: Tom Stellard <thomas.stellard at amd.com>
---
v2: Use an enumeration instead of a string, and make it a shader cap
    instead of a compute-specific cap.
v3: Split sampler views from shader resources.

 src/gallium/docs/source/screen.rst   |    2 ++
 src/gallium/include/pipe/p_defines.h |   11 ++++++++++-
 src/gallium/include/pipe/p_state.h   |    2 +-
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/gallium/docs/source/screen.rst b/src/gallium/docs/source/screen.rst
index 8e45840..d912dc6 100644
--- a/src/gallium/docs/source/screen.rst
+++ b/src/gallium/docs/source/screen.rst
@@ -185,6 +185,8 @@ to be 0.
   If unsupported, only float opcodes are supported.
 * ``PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS``: THe maximum number of texture
   samplers.
+* ``PIPE_SHADER_CAP_PREFERRED_IR``: Preferred representation of the
+  program.  It should be one of the ``pipe_shader_ir`` enum values.
 
 
 .. _pipe_compute_cap:
diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index 9a0bce1..edcca23 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -524,7 +524,16 @@ enum pipe_shader_cap
    PIPE_SHADER_CAP_INDIRECT_CONST_ADDR = 15,
    PIPE_SHADER_CAP_SUBROUTINES = 16, /* BGNSUB, ENDSUB, CAL, RET */
    PIPE_SHADER_CAP_INTEGERS = 17,
-   PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS = 18
+   PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS = 18,
+   PIPE_SHADER_CAP_PREFERRED_IR = 19
+};
+
+/**
+ * Shader intermediate representation.
+ */
+enum pipe_shader_ir
+{
+   PIPE_SHADER_IR_TGSI
 };
 
 /**
diff --git a/src/gallium/include/pipe/p_state.h b/src/gallium/include/pipe/p_state.h
index 7e741cf..02cd1fd 100644
--- a/src/gallium/include/pipe/p_state.h
+++ b/src/gallium/include/pipe/p_state.h
@@ -584,7 +584,7 @@ struct pipe_resolve_info
 
 struct pipe_compute_state
 {
-   const struct tgsi_token *tokens; /**< Compute program to be executed. */
+   const void *prog; /**< Compute program to be executed. */
    unsigned req_local_mem; /**< Required size of the LOCAL resource. */
    unsigned req_private_mem; /**< Required size of the PRIVATE resource. */
    unsigned req_input_mem; /**< Required size of the INPUT resource. */
-- 
1.7.10