This will be reused in a following patch.
---
src/gallium/drivers/radeonsi/si_shader_nir.c | 46 ++++++++++++--------
1 file changed, 27 insertions(+), 19 deletions(-)
diff --git a/src/gallium/drivers/radeonsi/si_shader_nir.c
b/src/gallium/drivers/radeonsi/si_shader_nir.c
index 7554f5b9f8b..5abda445e09 100644
--- a/src/gallium/drivers/radeonsi/si_shader_nir.c
+++ b/src/gallium/drivers/radeonsi/si_shader_nir.c
@@ -51,6 +51,32 @@ static nir_variable* intrinsic_get_var(nir_intrinsic_instr
*instr)
return nir_deref_instr_get_variable(nir_src_as_deref(instr->src[0]));
}
+static ubyte get_component_usagemask(unsigned first_comp,
+ unsigned num_components)
+{
+ ubyte usagemask = 0;
+ for (unsigned i = first_comp; i < num_components + first_comp; i++) {
+ switch (i) {
+ case 0:
+ usagemask |= TGSI_WRITEMASK_X;
+ break;
+ case 1:
+ usagemask |= TGSI_WRITEMASK_Y;
+ break;
+ case 2:
+ usagemask |= TGSI_WRITEMASK_Z;
+ break;
+ case 3:
+ usagemask |= TGSI_WRITEMASK_W;
+ break;
+ default:
+ unreachable("error calculating component index");
+ }
+ }
+
+ return usagemask;
+}
+
static void scan_instruction(struct tgsi_shader_info *info,
nir_instr *instr)
{
@@ -527,25 +553,7 @@ void si_nir_scan_shader(const struct nir_shader *nir,
}
}
- ubyte usagemask = 0;
- for (unsigned j = component; j < num_components +
component; j++) {
- switch (j) {
- case 0:
- usagemask |= TGSI_WRITEMASK_X;
- break;
- case 1:
- usagemask |= TGSI_WRITEMASK_Y;
- break;
- case 2:
- usagemask |= TGSI_WRITEMASK_Z;
- break;
- case 3:
- usagemask |= TGSI_WRITEMASK_W;
- break;
- default:
- unreachable("error calculating
component index");
- }
- }
+ ubyte usagemask = get_component_usagemask(component,
num_components);
unsigned gs_out_streams;
if (variable->data.stream & (1u << 31)) {
--
2.20.1
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