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ir_to_mesa: Add support for dereferencing matrices from arrays.

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This commit is contained in:
Eric Anholt
2010-07-12 14:14:53 -07:00
parent 506880bc32
commit 8258a6a2c3
1 changed files with 16 additions and 8 deletions
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24
src/mesa/shader/ir_to_mesa.cpp
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@@ -1099,6 +1099,7 @@ ir_to_mesa_visitor::visit(ir_dereference_array *ir)
ir_constant *index;
ir_to_mesa_src_reg src_reg;
ir_dereference_variable *deref_var = ir->array->as_dereference_variable();
int element_size = type_size(ir->type);
index = ir->array_index->constant_expression_value();
@@ -1125,7 +1126,7 @@ ir_to_mesa_visitor::visit(ir_dereference_array *ir)
ir->array_index->accept(this);
ir_to_mesa_emit_op2(ir, OPCODE_MUL,
ir_to_mesa_dst_reg_from_src(index_reg),
this->result, src_reg_for_float(4.0));
this->result, src_reg_for_float(element_size));
src_reg.reladdr = true;
ir_to_mesa_emit_op1(ir, OPCODE_ARL, ir_to_mesa_address_reg,
@@ -1136,11 +1137,6 @@ ir_to_mesa_visitor::visit(ir_dereference_array *ir)
return;
}
/* By the time we make it to this stage, matrices should be broken down
* to vectors.
*/
assert(!ir->type->is_matrix());
ir->array->accept(this);
src_reg = this->result;
@@ -1151,7 +1147,7 @@ ir_to_mesa_visitor::visit(ir_dereference_array *ir)
src_reg.index += index->value.i[0];
} else {
if (index) {
src_reg.index += index->value.i[0];
src_reg.index += index->value.i[0] * element_size;
} else {
ir_to_mesa_src_reg array_base = this->result;
/* Variable index array dereference. It eats the "vec4" of the
@@ -1160,12 +1156,24 @@ ir_to_mesa_visitor::visit(ir_dereference_array *ir)
*/
ir->array_index->accept(this);
ir_to_mesa_src_reg index_reg;
if (element_size == 1) {
index_reg = this->result;
} else {
index_reg = get_temp(glsl_type::float_type);
ir_to_mesa_emit_op2(ir, OPCODE_MUL,
ir_to_mesa_dst_reg_from_src(index_reg),
this->result, src_reg_for_float(element_size));
}
/* FINISHME: This doesn't work when we're trying to do the LHS
* of an assignment.
*/
src_reg.reladdr = true;
ir_to_mesa_emit_op1(ir, OPCODE_ARL, ir_to_mesa_address_reg,
this->result);
index_reg);
this->result = get_temp(ir->type);
ir_to_mesa_emit_op1(ir, OPCODE_MOV,