Module: Mesa Branch: master Commit: c4cf824658da283cf350fd6833d50dff9de4a1ad URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=c4cf824658da283cf350fd6833d50dff9de4a1ad
Author: Jordan Justen <[email protected]> Date: Mon Aug 17 16:32:42 2015 -0700 glsl/cs: Initialize gl_LocalInvocationIndex in main() We initialize gl_LocalInvocationIndex based on the extension spec formula: gl_LocalInvocationIndex = gl_LocalInvocationID.z * gl_WorkGroupSize.x * gl_WorkGroupSize.y + gl_LocalInvocationID.y * gl_WorkGroupSize.x + gl_LocalInvocationID.x; https://www.opengl.org/registry/specs/ARB/compute_shader.txt Signed-off-by: Jordan Justen <[email protected]> Reviewed-by: Tapani Pälli <[email protected]> --- src/glsl/builtin_variables.cpp | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/src/glsl/builtin_variables.cpp b/src/glsl/builtin_variables.cpp index 34d4006..b5e2908 100644 --- a/src/glsl/builtin_variables.cpp +++ b/src/glsl/builtin_variables.cpp @@ -402,6 +402,7 @@ private: const glsl_type * const bool_t; const glsl_type * const int_t; + const glsl_type * const uint_t; const glsl_type * const float_t; const glsl_type * const vec2_t; const glsl_type * const vec3_t; @@ -420,6 +421,7 @@ builtin_variable_generator::builtin_variable_generator( : instructions(instructions), state(state), symtab(state->symbols), compatibility(!state->is_version(140, 100)), bool_t(glsl_type::bool_type), int_t(glsl_type::int_type), + uint_t(glsl_type::uint_type), float_t(glsl_type::float_type), vec2_t(glsl_type::vec2_type), vec3_t(glsl_type::vec3_type), vec4_t(glsl_type::vec4_type), uvec3_t(glsl_type::uvec3_type), @@ -1061,6 +1063,7 @@ builtin_variable_generator::generate_cs_special_vars() "gl_LocalInvocationID"); add_system_value(SYSTEM_VALUE_WORK_GROUP_ID, uvec3_t, "gl_WorkGroupID"); add_variable("gl_GlobalInvocationID", uvec3_t, ir_var_auto, 0); + add_variable("gl_LocalInvocationIndex", uint_t, ir_var_auto, 0); /* TODO: finish this. */ } @@ -1253,6 +1256,25 @@ initialize_cs_derived_variables(gl_shader *shader, add(mul(gl_WorkGroupID, gl_WorkGroupSize), gl_LocalInvocationID)); main_sig->body.push_head(inst); + + /* gl_LocalInvocationIndex = + * gl_LocalInvocationID.z * gl_WorkGroupSize.x * gl_WorkGroupSize.y + + * gl_LocalInvocationID.y * gl_WorkGroupSize.x + + * gl_LocalInvocationID.x; + */ + ir_expression *index_z = + mul(mul(swizzle_z(gl_LocalInvocationID), swizzle_x(gl_WorkGroupSize)), + swizzle_y(gl_WorkGroupSize)); + ir_expression *index_y = + mul(swizzle_y(gl_LocalInvocationID), swizzle_x(gl_WorkGroupSize)); + ir_expression *index_y_plus_z = add(index_y, index_z); + operand index_x(swizzle_x(gl_LocalInvocationID)); + ir_expression *index_x_plus_y_plus_z = add(index_y_plus_z, index_x); + ir_variable *gl_LocalInvocationIndex = + shader->symbols->get_variable("gl_LocalInvocationIndex"); + assert(gl_LocalInvocationIndex); + inst = assign(gl_LocalInvocationIndex, index_x_plus_y_plus_z); + main_sig->body.push_head(inst); } _______________________________________________ mesa-commit mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-commit
