+static bool
+qpu_instruction_uses_rf(const struct v3d_qpu_instr *inst,
+ uint32_t waddr) {
+
+ if (inst->type != V3D_QPU_INSTR_TYPE_ALU)
+ return false;
+
+ if (v3d_qpu_uses_mux(inst, V3D_QPU_MUX_A) &&
+ inst->raddr_a == waddr)
+ return true;
+
+ if (v3d_qpu_uses_mux(inst, V3D_QPU_MUX_B) &&
+ !inst->sig.small_imm && (inst->raddr_b == waddr))
+ return true;
+
+ return false;
+}
+
+static bool
+mux_read_stalls(struct choose_scoreboard *scoreboard,
+ const struct v3d_qpu_instr *inst)
+{
+ return scoreboard->tick == scoreboard->last_stallable_sfu_tick + 1 &&
+ qpu_instruction_uses_rf(inst,
+ scoreboard->last_stallable_sfu_reg);
+}
+
+/* We define a max schedule priority to allow negative priorities as result of
+ * substracting this max when an instruction stalls. So instructions that
+ * stall have lower priority than regular instructions. */
+#define MAX_SCHEDULE_PRIORITY 16
+