broadcom/compiler: generalize check for shaders using pixel center W

V3D 4.x has pixel center W in rf0 and V3D 7.x has it in rf3. We already
account for this when we setup the c->payload_w, so use that.

Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25450>

diff --git a/src/broadcom/compiler/nir_to_vir.c b/src/broadcom/compiler/nir_to_vir.c
index 5776bfc..27a45e4 100644 (file)
--- a/src/broadcom/compiler/nir_to_vir.c
+++ b/src/broadcom/compiler/nir_to_vir.c
@@ -4533,8 +4533,8 @@ vir_check_payload_w(struct v3d_compile *c)
 
         vir_for_each_inst_inorder(inst, c) {
                 for (int i = 0; i < vir_get_nsrc(inst); i++) {
-                        if (inst->src[i].file == QFILE_REG &&
-                            inst->src[i].index == 0) {
+                        if (inst->src[i].file == c->payload_w.file &&
+                            inst->src[i].index == c->payload_w.index) {
                                 c->uses_center_w = true;
                                 return;
                         }