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i965/vs: Add support for loops. 

This is copied from brw_fs.cpp, instead of doing the temporary IR
generation that ir_to_mesa does.  Fixes glsl-vs-loop and friends.
This commit is contained in:
Eric Anholt 2011-08-09 14:35:38 -07:00
parent abf843a797
commit 0b359e3ea0
1 changed files with 21 additions and 32 deletions
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53
src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
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@ -700,58 +700,47 @@ vec4_visitor::visit(ir_variable *ir)
void
vec4_visitor::visit(ir_loop *ir)
{
ir_dereference_variable *counter = NULL;
fail("not yet\n");
dst_reg counter;
/* We don't want debugging output to print the whole body of the
* loop as the annotation.
*/
this->base_ir = NULL;
if (ir->counter != NULL)
counter = new(ir) ir_dereference_variable(ir->counter);
if (ir->counter != NULL) {
this->base_ir = ir->counter;
ir->counter->accept(this);
counter = *(variable_storage(ir->counter));
if (ir->from != NULL) {
assert(ir->counter != NULL);
if (ir->from != NULL) {
this->base_ir = ir->from;
ir->from->accept(this);
ir_assignment *a = new(ir) ir_assignment(counter, ir->from, NULL);
a->accept(this);
delete a;
emit(BRW_OPCODE_MOV, counter, this->result);
}
}
emit(BRW_OPCODE_DO);
if (ir->to) {
ir_expression *e =
new(ir) ir_expression(ir->cmp, glsl_type::bool_type,
counter, ir->to);
ir_if *if_stmt = new(ir) ir_if(e);
this->base_ir = ir->to;
ir->to->accept(this);
ir_loop_jump *brk = new(ir) ir_loop_jump(ir_loop_jump::jump_break);
vec4_instruction *inst = emit(BRW_OPCODE_CMP, dst_null_d(),
src_reg(counter), this->result);
inst->conditional_mod = brw_conditional_for_comparison(ir->cmp);
if_stmt->then_instructions.push_tail(brk);
if_stmt->accept(this);
delete if_stmt;
delete e;
delete brk;
inst = emit(BRW_OPCODE_BREAK);
inst->predicate = BRW_PREDICATE_NORMAL;
}
visit_instructions(&ir->body_instructions);
if (ir->increment) {
ir_expression *e =
new(ir) ir_expression(ir_binop_add, counter->type,
counter, ir->increment);
ir_assignment *a = new(ir) ir_assignment(counter, e, NULL);
a->accept(this);
delete a;
delete e;
this->base_ir = ir->increment;
ir->increment->accept(this);
emit(BRW_OPCODE_ADD, counter, src_reg(counter), this->result);
}
emit(BRW_OPCODE_WHILE);