/* This functions offsets the temporary register indices by the number
* of input registers, because input registers are actually temporaries and
* should not occupy the same space.
*
* This pass is supposed to be used to maintain correct allocation of inputs
* if the standard register allocation is disabled. */
void rc_pair_regalloc_inputs_only(struct radeon_compiler *cc, void *user)
{
struct r300_fragment_program_compiler *c = (struct r300_fragment_program_compiler*)cc;
struct regalloc_state s;
compute_live_intervals(cc, &s);
c->AllocateHwInputs(c, &alloc_input, &s);
int temp_reg_offset = 0;
for (unsigned i = 0; i < RC_REGISTER_MAX_INDEX; i++) {
if (s.Input[i].Allocated && temp_reg_offset <= s.Input[i].Index)
temp_reg_offset = s.Input[i].Index + 1;
}
if (temp_reg_offset) {
for (unsigned i = 0; i < RC_REGISTER_MAX_INDEX; i++) {
if (s.Temporary[i].Used) {
s.Temporary[i].Allocated = 1;
s.Temporary[i].File = RC_FILE_TEMPORARY;
s.Temporary[i].Index = i + temp_reg_offset;
}
}
/* Rewrite all registers. */
for (struct rc_instruction *inst = cc->Program.Instructions.Next;
inst != &cc->Program.Instructions;
inst = inst->Next) {
rc_remap_registers(inst, &remap_register, &s);
}
}
}
void rc_pair_regalloc(struct radeon_compiler *cc, void *user)
{
struct r300_fragment_program_compiler *c = (struct r300_fragment_program_compiler*)cc;
struct regalloc_state s;
compute_live_intervals(cc, &s);
c->AllocateHwInputs(c, &alloc_input, &s);
do_regalloc(&s);
}
void rc_pair_regalloc(struct r300_fragment_program_compiler *c, unsigned maxtemps)
{
struct regalloc_state s;
memset(&s, 0, sizeof(s));
s.C = &c->Base;
s.NumHwTemporaries = maxtemps;
s.HwTemporary = memory_pool_malloc(&s.C->Pool, maxtemps*sizeof(struct hardware_register));
memset(s.HwTemporary, 0, maxtemps*sizeof(struct hardware_register));
compute_live_intervals(&s);
c->AllocateHwInputs(c, &alloc_input, &s);
do_regalloc(&s);
}
