diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/shader/ir_to_mesa.cpp | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/mesa/shader/ir_to_mesa.cpp b/src/mesa/shader/ir_to_mesa.cpp index 467e335fc4b..fc50d26a618 100644 --- a/src/mesa/shader/ir_to_mesa.cpp +++ b/src/mesa/shader/ir_to_mesa.cpp @@ -178,6 +178,9 @@ public: ir_to_mesa_src_reg src0, ir_to_mesa_src_reg src1); + GLboolean try_emit_mad(ir_expression *ir, + int mul_operand); + int *sampler_map; int sampler_map_size; @@ -530,6 +533,30 @@ ir_to_mesa_visitor::visit(ir_function *ir) } } +GLboolean +ir_to_mesa_visitor::try_emit_mad(ir_expression *ir, int mul_operand) +{ + int nonmul_operand = 1 - mul_operand; + ir_to_mesa_src_reg a, b, c; + + ir_expression *expr = ir->operands[mul_operand]->as_expression(); + if (!expr || expr->operation != ir_binop_mul) + return false; + + expr->operands[0]->accept(this); + a = this->result; + expr->operands[1]->accept(this); + b = this->result; + ir->operands[nonmul_operand]->accept(this); + c = this->result; + + this->result = get_temp(ir->type); + ir_to_mesa_emit_op3(ir, OPCODE_MAD, + ir_to_mesa_dst_reg_from_src(this->result), a, b, c); + + return true; +} + void ir_to_mesa_visitor::visit(ir_expression *ir) { @@ -541,6 +568,15 @@ ir_to_mesa_visitor::visit(ir_expression *ir) const glsl_type *vec3_type = glsl_type::get_instance(GLSL_TYPE_FLOAT, 3, 1); const glsl_type *vec2_type = glsl_type::get_instance(GLSL_TYPE_FLOAT, 2, 1); + /* Quick peephole: Emit OPCODE_MAD(a, b, c) instead of ADD(MUL(a, b), c) + */ + if (ir->operation == ir_binop_add) { + if (try_emit_mad(ir, 1)) + return; + if (try_emit_mad(ir, 0)) + return; + } + for (operand = 0; operand < ir->get_num_operands(); operand++) { this->result.file = PROGRAM_UNDEFINED; ir->operands[operand]->accept(this); |