OpenHarmony/third_party_mesa3d
2
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

program: Use u_bit_scan64 in prog_to_nir.

Browse Source 
We can simply iterate the bits rather than using util_last_bit and
checking each one up until that point.

Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Kenneth Graunke
2019-01-31 22:02:55 -08:00
parent a01ad3110a
commit fa38ca25f6
1 changed files with 6 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
src/mesa/program/prog_to_nir.c
View File

@@ -858,10 +858,9 @@ setup_registers_and_variables(struct ptn_compile *c)
struct nir_shader *shader = b->shader;
/* Create input variables. */
const int num_inputs = util_last_bit64(c->prog->info.inputs_read);
for (int i = 0; i < num_inputs; i++) {
if (!(c->prog->info.inputs_read & BITFIELD64_BIT(i)))
continue;
uint64_t inputs_read = c->prog->info.inputs_read;
while (inputs_read) {
const int i = u_bit_scan64(&inputs_read);
nir_variable *var =
nir_variable_create(shader, nir_var_shader_in, glsl_vec4_type(),
@@ -907,9 +906,9 @@ setup_registers_and_variables(struct ptn_compile *c)
int max_outputs = util_last_bit(c->prog->info.outputs_written);
c->output_regs = rzalloc_array(c, nir_register *, max_outputs);
for (int i = 0; i < max_outputs; i++) {
if (!(c->prog->info.outputs_written & BITFIELD64_BIT(i)))
continue;
uint64_t outputs_written = c->prog->info.outputs_written;
while (outputs_written) {
const int i = u_bit_scan64(&outputs_written);
/* Since we can't load from outputs in the IR, we make temporaries
* for the outputs and emit stores to the real outputs at the end of