diff options
| -rw-r--r-- | src/glsl/builtin_variables.cpp | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/glsl/builtin_variables.cpp b/src/glsl/builtin_variables.cpp index 34d4006f86f..b5e2908f951 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); } |