diff options
Diffstat (limited to 'src/glsl')
| -rw-r--r-- | src/glsl/lower_packed_varyings.cpp | 117 |
1 files changed, 90 insertions, 27 deletions
diff --git a/src/glsl/lower_packed_varyings.cpp b/src/glsl/lower_packed_varyings.cpp index 5e844c792e8..2c9a1c49517 100644 --- a/src/glsl/lower_packed_varyings.cpp +++ b/src/glsl/lower_packed_varyings.cpp @@ -146,7 +146,11 @@ #include "glsl_symbol_table.h" #include "ir.h" +#include "ir_builder.h" #include "ir_optimization.h" +#include "program/prog_instruction.h" + +using namespace ir_builder; namespace { @@ -163,13 +167,14 @@ public: lower_packed_varyings_visitor(void *mem_ctx, unsigned locations_used, ir_variable_mode mode, unsigned gs_input_vertices, - exec_list *out_instructions); + exec_list *out_instructions, + exec_list *out_variables); void run(exec_list *instructions); private: - ir_assignment *bitwise_assign_pack(ir_rvalue *lhs, ir_rvalue *rhs); - ir_assignment *bitwise_assign_unpack(ir_rvalue *lhs, ir_rvalue *rhs); + void bitwise_assign_pack(ir_rvalue *lhs, ir_rvalue *rhs); + void bitwise_assign_unpack(ir_rvalue *lhs, ir_rvalue *rhs); unsigned lower_rvalue(ir_rvalue *rvalue, unsigned fine_location, ir_variable *unpacked_var, const char *name, bool gs_input_toplevel, unsigned vertex_index); @@ -221,13 +226,19 @@ private: * appropriate place in the shader once the visitor has finished running. */ exec_list *out_instructions; + + /** + * Exec list into which the visitor should insert any new variables. + */ + exec_list *out_variables; }; } /* anonymous namespace */ lower_packed_varyings_visitor::lower_packed_varyings_visitor( void *mem_ctx, unsigned locations_used, ir_variable_mode mode, - unsigned gs_input_vertices, exec_list *out_instructions) + unsigned gs_input_vertices, exec_list *out_instructions, + exec_list *out_variables) : mem_ctx(mem_ctx), locations_used(locations_used), packed_varyings((ir_variable **) @@ -235,7 +246,8 @@ lower_packed_varyings_visitor::lower_packed_varyings_visitor( locations_used)), mode(mode), gs_input_vertices(gs_input_vertices), - out_instructions(out_instructions) + out_instructions(out_instructions), + out_variables(out_variables) { } @@ -274,6 +286,7 @@ lower_packed_varyings_visitor::run(exec_list *instructions) } } +#define SWIZZLE_ZWZW MAKE_SWIZZLE4(SWIZZLE_Z, SWIZZLE_W, SWIZZLE_Z, SWIZZLE_W) /** * Make an ir_assignment from \c rhs to \c lhs, performing appropriate @@ -281,7 +294,7 @@ lower_packed_varyings_visitor::run(exec_list *instructions) * * This function is called when packing varyings. */ -ir_assignment * +void lower_packed_varyings_visitor::bitwise_assign_pack(ir_rvalue *lhs, ir_rvalue *rhs) { @@ -300,12 +313,28 @@ lower_packed_varyings_visitor::bitwise_assign_pack(ir_rvalue *lhs, rhs = new(this->mem_ctx) ir_expression(ir_unop_bitcast_f2i, lhs->type, rhs); break; + case GLSL_TYPE_DOUBLE: + assert(rhs->type->vector_elements <= 2); + if (rhs->type->vector_elements == 2) { + ir_variable *t = new(mem_ctx) ir_variable(lhs->type, "pack", ir_var_temporary); + + assert(lhs->type->vector_elements == 4); + this->out_variables->push_tail(t); + this->out_instructions->push_tail( + assign(t, u2i(expr(ir_unop_unpack_double_2x32, swizzle_x(rhs->clone(mem_ctx, NULL)))), 0x3)); + this->out_instructions->push_tail( + assign(t, u2i(expr(ir_unop_unpack_double_2x32, swizzle_y(rhs))), 0xc)); + rhs = deref(t).val; + } else { + rhs = u2i(expr(ir_unop_unpack_double_2x32, rhs)); + } + break; default: assert(!"Unexpected type conversion while lowering varyings"); break; } } - return new(this->mem_ctx) ir_assignment(lhs, rhs); + this->out_instructions->push_tail(new (this->mem_ctx) ir_assignment(lhs, rhs)); } @@ -315,7 +344,7 @@ lower_packed_varyings_visitor::bitwise_assign_pack(ir_rvalue *lhs, * * This function is called when unpacking varyings. */ -ir_assignment * +void lower_packed_varyings_visitor::bitwise_assign_unpack(ir_rvalue *lhs, ir_rvalue *rhs) { @@ -334,12 +363,27 @@ lower_packed_varyings_visitor::bitwise_assign_unpack(ir_rvalue *lhs, rhs = new(this->mem_ctx) ir_expression(ir_unop_bitcast_i2f, lhs->type, rhs); break; + case GLSL_TYPE_DOUBLE: + assert(lhs->type->vector_elements <= 2); + if (lhs->type->vector_elements == 2) { + ir_variable *t = new(mem_ctx) ir_variable(lhs->type, "unpack", ir_var_temporary); + assert(rhs->type->vector_elements == 4); + this->out_variables->push_tail(t); + this->out_instructions->push_tail( + assign(t, expr(ir_unop_pack_double_2x32, i2u(swizzle_xy(rhs->clone(mem_ctx, NULL)))), 0x1)); + this->out_instructions->push_tail( + assign(t, expr(ir_unop_pack_double_2x32, i2u(swizzle(rhs->clone(mem_ctx, NULL), SWIZZLE_ZWZW, 2))), 0x2)); + rhs = deref(t).val; + } else { + rhs = expr(ir_unop_pack_double_2x32, i2u(rhs)); + } + break; default: assert(!"Unexpected type conversion while lowering varyings"); break; } } - return new(this->mem_ctx) ir_assignment(lhs, rhs); + this->out_instructions->push_tail(new(this->mem_ctx) ir_assignment(lhs, rhs)); } @@ -372,6 +416,7 @@ lower_packed_varyings_visitor::lower_rvalue(ir_rvalue *rvalue, bool gs_input_toplevel, unsigned vertex_index) { + unsigned dmul = rvalue->type->is_double() ? 2 : 1; /* When gs_input_toplevel is set, we should be looking at a geometry shader * input array. */ @@ -405,17 +450,26 @@ lower_packed_varyings_visitor::lower_rvalue(ir_rvalue *rvalue, return this->lower_arraylike(rvalue, rvalue->type->matrix_columns, fine_location, unpacked_var, name, false, vertex_index); - } else if (rvalue->type->vector_elements + fine_location % 4 > 4) { + } else if (rvalue->type->vector_elements * dmul + + fine_location % 4 > 4) { /* This vector is going to be "double parked" across two varying slots, - * so handle it as two separate assignments. + * so handle it as two separate assignments. For doubles, a dvec3/dvec4 + * can end up being spread over 3 slots. However the second splitting + * will happen later, here we just always want to split into 2. */ - unsigned left_components = 4 - fine_location % 4; - unsigned right_components - = rvalue->type->vector_elements - left_components; + unsigned left_components, right_components; unsigned left_swizzle_values[4] = { 0, 0, 0, 0 }; unsigned right_swizzle_values[4] = { 0, 0, 0, 0 }; char left_swizzle_name[4] = { 0, 0, 0, 0 }; char right_swizzle_name[4] = { 0, 0, 0, 0 }; + + left_components = 4 - fine_location % 4; + if (rvalue->type->is_double()) { + /* We might actually end up with 0 left components! */ + left_components /= 2; + } + right_components = rvalue->type->vector_elements - left_components; + for (unsigned i = 0; i < left_components; i++) { left_swizzle_values[i] = i; left_swizzle_name[i] = "xyzw"[i]; @@ -433,9 +487,13 @@ lower_packed_varyings_visitor::lower_rvalue(ir_rvalue *rvalue, = ralloc_asprintf(this->mem_ctx, "%s.%s", name, left_swizzle_name); char *right_name = ralloc_asprintf(this->mem_ctx, "%s.%s", name, right_swizzle_name); - fine_location = this->lower_rvalue(left_swizzle, fine_location, - unpacked_var, left_name, false, - vertex_index); + if (left_components) + fine_location = this->lower_rvalue(left_swizzle, fine_location, + unpacked_var, left_name, false, + vertex_index); + else + /* Top up the fine location to the next slot */ + fine_location++; return this->lower_rvalue(right_swizzle, fine_location, unpacked_var, right_name, false, vertex_index); } else { @@ -443,7 +501,7 @@ lower_packed_varyings_visitor::lower_rvalue(ir_rvalue *rvalue, * varying. */ unsigned swizzle_values[4] = { 0, 0, 0, 0 }; - unsigned components = rvalue->type->vector_elements; + unsigned components = rvalue->type->vector_elements * dmul; unsigned location = fine_location / 4; unsigned location_frac = fine_location % 4; for (unsigned i = 0; i < components; ++i) @@ -454,13 +512,9 @@ lower_packed_varyings_visitor::lower_rvalue(ir_rvalue *rvalue, ir_swizzle *swizzle = new(this->mem_ctx) ir_swizzle(packed_deref, swizzle_values, components); if (this->mode == ir_var_shader_out) { - ir_assignment *assignment - = this->bitwise_assign_pack(swizzle, rvalue); - this->out_instructions->push_tail(assignment); + this->bitwise_assign_pack(swizzle, rvalue); } else { - ir_assignment *assignment - = this->bitwise_assign_unpack(rvalue, swizzle); - this->out_instructions->push_tail(assignment); + this->bitwise_assign_unpack(rvalue, swizzle); } return fine_location + components; } @@ -598,7 +652,7 @@ lower_packed_varyings_visitor::needs_lowering(ir_variable *var) } if (type->is_array()) type = type->fields.array; - if (type->vector_elements == 4) + if (type->vector_elements == 4 && !type->is_double()) return false; return true; } @@ -657,9 +711,11 @@ lower_packed_varyings(void *mem_ctx, unsigned locations_used, exec_list void_parameters; ir_function_signature *main_func_sig = main_func->matching_signature(NULL, &void_parameters, false); - exec_list new_instructions; + exec_list new_instructions, new_variables; lower_packed_varyings_visitor visitor(mem_ctx, locations_used, mode, - gs_input_vertices, &new_instructions); + gs_input_vertices, + &new_instructions, + &new_variables); visitor.run(instructions); if (mode == ir_var_shader_out) { if (shader->Stage == MESA_SHADER_GEOMETRY) { @@ -667,15 +723,22 @@ lower_packed_varyings(void *mem_ctx, unsigned locations_used, * to EmitVertex() */ lower_packed_varyings_gs_splicer splicer(mem_ctx, &new_instructions); + + /* Add all the variables in first. */ + main_func_sig->body.head->insert_before(&new_variables); + + /* Now update all the EmitVertex instances */ splicer.run(instructions); } else { /* For other shader types, outputs need to be lowered at the end of * main() */ + main_func_sig->body.append_list(&new_variables); main_func_sig->body.append_list(&new_instructions); } } else { /* Shader inputs need to be lowered at the beginning of main() */ main_func_sig->body.head->insert_before(&new_instructions); + main_func_sig->body.head->insert_before(&new_variables); } } |