Mesa (master): glsl: Add built-in functions and constants required for ARB_shader_atomic_counters .
Francisco Jerez
currojerez at kemper.freedesktop.org
Tue Oct 29 19:45:41 UTC 2013
Module: Mesa
Branch: master
Commit: bbded5b5feb40ee69717dc113fb4be1dc4807227
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=bbded5b5feb40ee69717dc113fb4be1dc4807227
Author: Francisco Jerez <currojerez at riseup.net>
Date: Sun Oct 20 12:39:16 2013 -0700
glsl: Add built-in functions and constants required for ARB_shader_atomic_counters.
v2: Represent atomics as GLSL intrinsics.
Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>
---
src/glsl/builtin_functions.cpp | 58 +++++++++++++++++++++++++++++++++++++++
src/glsl/builtin_variables.cpp | 15 ++++++++++
src/glsl/glcpp/glcpp-parse.y | 3 ++
src/glsl/glsl_parser_extras.cpp | 6 ++++
src/glsl/glsl_parser_extras.h | 7 +++++
5 files changed, 89 insertions(+), 0 deletions(-)
diff --git a/src/glsl/builtin_functions.cpp b/src/glsl/builtin_functions.cpp
index f122259..3fa0cb5 100644
--- a/src/glsl/builtin_functions.cpp
+++ b/src/glsl/builtin_functions.cpp
@@ -326,6 +326,13 @@ tex3d_lod(const _mesa_glsl_parse_state *state)
{
return tex3d(state) && lod_exists_in_stage(state);
}
+
+static bool
+shader_atomic_counters(const _mesa_glsl_parse_state *state)
+{
+ return state->ARB_shader_atomic_counters_enable;
+}
+
/** @} */
/******************************************************************************/
@@ -556,6 +563,11 @@ private:
B1(uaddCarry)
B1(usubBorrow)
B1(mulExtended)
+
+ ir_function_signature *_atomic_intrinsic(builtin_available_predicate avail);
+ ir_function_signature *_atomic_op(const char *intrinsic,
+ builtin_available_predicate avail);
+
#undef B0
#undef B1
#undef B2
@@ -662,6 +674,15 @@ builtin_builder::create_shader()
void
builtin_builder::create_intrinsics()
{
+ add_function("__intrinsic_atomic_read",
+ _atomic_intrinsic(shader_atomic_counters),
+ NULL);
+ add_function("__intrinsic_atomic_increment",
+ _atomic_intrinsic(shader_atomic_counters),
+ NULL);
+ add_function("__intrinsic_atomic_predecrement",
+ _atomic_intrinsic(shader_atomic_counters),
+ NULL);
}
/**
@@ -2070,6 +2091,20 @@ builtin_builder::create_builtins()
_mulExtended(glsl_type::uvec3_type),
_mulExtended(glsl_type::uvec4_type),
NULL);
+
+ add_function("atomicCounter",
+ _atomic_op("__intrinsic_atomic_read",
+ shader_atomic_counters),
+ NULL);
+ add_function("atomicCounterIncrement",
+ _atomic_op("__intrinsic_atomic_increment",
+ shader_atomic_counters),
+ NULL);
+ add_function("atomicCounterDecrement",
+ _atomic_op("__intrinsic_atomic_predecrement",
+ shader_atomic_counters),
+ NULL);
+
#undef F
#undef FI
#undef FIU
@@ -3932,6 +3967,29 @@ builtin_builder::_mulExtended(const glsl_type *type)
return sig;
}
+
+ir_function_signature *
+builtin_builder::_atomic_intrinsic(builtin_available_predicate avail)
+{
+ ir_variable *counter = in_var(glsl_type::atomic_uint_type, "counter");
+ MAKE_INTRINSIC(glsl_type::uint_type, avail, 1, counter);
+ return sig;
+}
+
+ir_function_signature *
+builtin_builder::_atomic_op(const char *intrinsic,
+ builtin_available_predicate avail)
+{
+ ir_variable *counter = in_var(glsl_type::atomic_uint_type, "atomic_counter");
+ MAKE_SIG(glsl_type::uint_type, avail, 1, counter);
+
+ ir_variable *retval = body.make_temp(glsl_type::uint_type, "atomic_retval");
+ body.emit(call(shader->symbols->get_function(intrinsic), retval,
+ sig->parameters));
+ body.emit(ret(retval));
+ return sig;
+}
+
/** @} */
/******************************************************************************/
diff --git a/src/glsl/builtin_variables.cpp b/src/glsl/builtin_variables.cpp
index 018daf6..7a3505a 100644
--- a/src/glsl/builtin_variables.cpp
+++ b/src/glsl/builtin_variables.cpp
@@ -638,6 +638,21 @@ builtin_variable_generator::generate_constants()
*/
add_const("gl_MaxTextureCoords", state->Const.MaxTextureCoords);
}
+
+ if (state->ARB_shader_atomic_counters_enable) {
+ add_const("gl_MaxVertexAtomicCounters",
+ state->Const.MaxVertexAtomicCounters);
+ add_const("gl_MaxGeometryAtomicCounters",
+ state->Const.MaxGeometryAtomicCounters);
+ add_const("gl_MaxFragmentAtomicCounters",
+ state->Const.MaxFragmentAtomicCounters);
+ add_const("gl_MaxCombinedAtomicCounters",
+ state->Const.MaxCombinedAtomicCounters);
+ add_const("gl_MaxAtomicCounterBindings",
+ state->Const.MaxAtomicBufferBindings);
+ add_const("gl_MaxTessControlAtomicCounters", 0);
+ add_const("gl_MaxTessEvaluationAtomicCounters", 0);
+ }
}
diff --git a/src/glsl/glcpp/glcpp-parse.y b/src/glsl/glcpp/glcpp-parse.y
index 02100ab..86f3cd5 100644
--- a/src/glsl/glcpp/glcpp-parse.y
+++ b/src/glsl/glcpp/glcpp-parse.y
@@ -1254,6 +1254,9 @@ glcpp_parser_create (const struct gl_extensions *extensions, int api)
if (extensions->ARB_texture_gather)
add_builtin_define(parser, "GL_ARB_texture_gather", 1);
+
+ if (extensions->ARB_shader_atomic_counters)
+ add_builtin_define(parser, "GL_ARB_shader_atomic_counters", 1);
}
}
diff --git a/src/glsl/glsl_parser_extras.cpp b/src/glsl/glsl_parser_extras.cpp
index 6a69e22..77e8816 100644
--- a/src/glsl/glsl_parser_extras.cpp
+++ b/src/glsl/glsl_parser_extras.cpp
@@ -118,6 +118,12 @@ _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
this->Const.MaxGeometryTotalOutputComponents = ctx->Const.MaxGeometryTotalOutputComponents;
this->Const.MaxGeometryUniformComponents = ctx->Const.GeometryProgram.MaxUniformComponents;
+ this->Const.MaxVertexAtomicCounters = ctx->Const.VertexProgram.MaxAtomicCounters;
+ this->Const.MaxGeometryAtomicCounters = ctx->Const.GeometryProgram.MaxAtomicCounters;
+ this->Const.MaxFragmentAtomicCounters = ctx->Const.FragmentProgram.MaxAtomicCounters;
+ this->Const.MaxCombinedAtomicCounters = ctx->Const.MaxCombinedAtomicCounters;
+ this->Const.MaxAtomicBufferBindings = ctx->Const.MaxAtomicBufferBindings;
+
this->current_function = NULL;
this->toplevel_ir = NULL;
this->found_return = false;
diff --git a/src/glsl/glsl_parser_extras.h b/src/glsl/glsl_parser_extras.h
index 27a7a5c..f3560c3 100644
--- a/src/glsl/glsl_parser_extras.h
+++ b/src/glsl/glsl_parser_extras.h
@@ -229,6 +229,13 @@ struct _mesa_glsl_parse_state {
unsigned MaxGeometryOutputVertices;
unsigned MaxGeometryTotalOutputComponents;
unsigned MaxGeometryUniformComponents;
+
+ /* ARB_shader_atomic_counters */
+ unsigned MaxVertexAtomicCounters;
+ unsigned MaxGeometryAtomicCounters;
+ unsigned MaxFragmentAtomicCounters;
+ unsigned MaxCombinedAtomicCounters;
+ unsigned MaxAtomicBufferBindings;
} Const;
/**
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