diff options
Diffstat (limited to 'src/mesa/program/ir_to_mesa.cpp')
-rw-r--r-- | src/mesa/program/ir_to_mesa.cpp | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/src/mesa/program/ir_to_mesa.cpp b/src/mesa/program/ir_to_mesa.cpp index 1b5337e92ee..1cb81830426 100644 --- a/src/mesa/program/ir_to_mesa.cpp +++ b/src/mesa/program/ir_to_mesa.cpp @@ -289,6 +289,8 @@ public: GLboolean try_emit_mad(ir_expression *ir, int mul_operand); + void emit_swz(ir_expression *ir); + bool process_move_condition(ir_rvalue *ir); void *mem_ctx; @@ -958,6 +960,123 @@ ir_to_mesa_visitor::reladdr_to_temp(ir_instruction *ir, } void +ir_to_mesa_visitor::emit_swz(ir_expression *ir) +{ + /* Assume that the vector operator is in a form compatible with OPCODE_SWZ. + * This means that each of the operands is either an immediate value of -1, + * 0, or 1, or is a component from one source register (possibly with + * negation). + */ + uint8_t components[4] = { 0 }; + bool negate[4] = { false }; + ir_variable *var = NULL; + + for (unsigned i = 0; i < ir->type->vector_elements; i++) { + ir_rvalue *op = ir->operands[i]; + + assert(op->type->is_scalar()); + + while (op != NULL) { + switch (op->ir_type) { + case ir_type_constant: { + + assert(op->type->is_scalar()); + + const ir_constant *const c = op->as_constant(); + if (c->is_one()) { + components[i] = SWIZZLE_ONE; + } else if (c->is_zero()) { + components[i] = SWIZZLE_ZERO; + } else if (c->is_negative_one()) { + components[i] = SWIZZLE_ONE; + negate[i] = true; + } else { + assert(!"SWZ constant must be 0.0 or 1.0."); + } + + op = NULL; + break; + } + + case ir_type_dereference_variable: { + ir_dereference_variable *const deref = + (ir_dereference_variable *) op; + + assert((var == NULL) || (deref->var == var)); + components[i] = SWIZZLE_X; + var = deref->var; + op = NULL; + break; + } + + case ir_type_expression: { + ir_expression *const expr = (ir_expression *) op; + + assert(expr->operation == ir_unop_neg); + negate[i] = true; + + op = expr->operands[0]; + break; + } + + case ir_type_swizzle: { + ir_swizzle *const swiz = (ir_swizzle *) op; + + components[i] = swiz->mask.x; + op = swiz->val; + break; + } + + default: + assert(!"Should not get here."); + return; + } + } + } + + assert(var != NULL); + + ir_dereference_variable *const deref = + new(mem_ctx) ir_dereference_variable(var); + + this->result.file = PROGRAM_UNDEFINED; + deref->accept(this); + if (this->result.file == PROGRAM_UNDEFINED) { + ir_print_visitor v; + printf("Failed to get tree for expression operand:\n"); + deref->accept(&v); + exit(1); + } + + ir_to_mesa_src_reg src; + + src = this->result; + src.swizzle = MAKE_SWIZZLE4(components[0], + components[1], + components[2], + components[3]); + src.negate = ((unsigned(negate[0]) << 0) + | (unsigned(negate[1]) << 1) + | (unsigned(negate[2]) << 2) + | (unsigned(negate[3]) << 3)); + + /* Storage for our result. Ideally for an assignment we'd be using the + * actual storage for the result here, instead. + */ + const ir_to_mesa_src_reg result_src = get_temp(ir->type); + ir_to_mesa_dst_reg result_dst = ir_to_mesa_dst_reg_from_src(result_src); + + /* Limit writes to the channels that will be used by result_src later. + * This does limit this temp's use as a temporary for multi-instruction + * sequences. + */ + result_dst.writemask = (1 << ir->type->vector_elements) - 1; + + ir_to_mesa_emit_op1(ir, OPCODE_SWZ, result_dst, src); + this->result = result_src; +} + +void ir_to_mesa_visitor::visit(ir_expression *ir) { unsigned int operand; @@ -974,6 +1093,11 @@ ir_to_mesa_visitor::visit(ir_expression *ir) return; } + if (ir->operation == ir_quadop_vector) { + this->emit_swz(ir); + return; + } + for (operand = 0; operand < ir->get_num_operands(); operand++) { this->result.file = PROGRAM_UNDEFINED; ir->operands[operand]->accept(this); @@ -1231,6 +1355,12 @@ ir_to_mesa_visitor::visit(ir_expression *ir) case ir_unop_round_even: assert(!"GLSL 1.30 features unsupported"); break; + + case ir_quadop_vector: + /* This operation should have already been handled. + */ + assert(!"Should not get here."); + break; } this->result = result_src; @@ -2676,6 +2806,8 @@ _mesa_ir_link_shader(struct gl_context *ctx, struct gl_shader_program *prog) progress = do_common_optimization(ir, true, options->MaxUnrollIterations) || progress; + progress = lower_quadop_vector(ir, true) || progress; + if (options->EmitNoIfs) progress = do_if_to_cond_assign(ir) || progress; |