/* calculate delay for instruction (maximum of delay for all srcs): */
static unsigned delay_calc(struct ir3_sched_ctx *ctx,
struct ir3_instruction *instr)
{
unsigned i, delay = 0;
for (i = 1; i < instr->regs_count; i++) {
struct ir3_register *reg = instr->regs[i];
if (reg->flags & IR3_REG_SSA) {
unsigned d = delay_calc_srcn(ctx, reg->instr,
instr, i - 1);
delay = MAX2(delay, d);
}
}
return delay;
}
/* calculate delay for specified src: */
static unsigned
delay_calc_srcn(struct ir3_sched_ctx *ctx,
struct ir3_instruction *assigner,
struct ir3_instruction *consumer, unsigned srcn)
{
unsigned delay = 0;
if (is_meta(assigner)) {
struct ir3_instruction *src;
foreach_ssa_src(src, assigner) {
unsigned d;
if (src->block != assigner->block)
break;
d = delay_calc_srcn(ctx, src, consumer, srcn);
delay = MAX2(delay, d);
}
} else {
/* calculate delay for specified src: */
static unsigned delay_calc_srcn(struct ir3_sched_ctx *ctx,
struct ir3_instruction *assigner,
struct ir3_instruction *consumer, unsigned srcn)
{
unsigned delay = 0;
if (is_meta(assigner)) {
unsigned i;
for (i = 1; i < assigner->regs_count; i++) {
struct ir3_register *reg = assigner->regs[i];
if (reg->flags & IR3_REG_SSA) {
unsigned d = delay_calc_srcn(ctx, reg->instr,
consumer, srcn);
delay = MAX2(delay, d);
}
}
} else {
delay = ir3_delayslots(assigner, consumer, srcn);
delay -= distance(ctx, assigner, delay);
}
return delay;
}
