broadcom/compiler: add a v3d71_qpu_writes_waddr_explicitly helper

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

src/broadcom/qpu/qpu_instr.c

@@ -968,6 +968,34 @@ v3d71_qpu_reads_raddr(const struct v3d_qpu_instr *inst, uint8_t raddr)
                (mul_nsrc > 1 && inst->alu.mul.b.raddr == raddr);
 }
 
+bool
+v3d71_qpu_writes_waddr_explicitly(const struct v3d_device_info *devinfo,
+                                  const struct v3d_qpu_instr *inst,
+                                  uint8_t waddr)
+{
+        if (inst->type != V3D_QPU_INSTR_TYPE_ALU)
+                return false;
+
+        if (v3d_qpu_add_op_has_dst(inst->alu.add.op) &&
+            !inst->alu.add.magic_write &&
+            inst->alu.add.waddr == waddr) {
+                return true;
+        }
+
+        if (v3d_qpu_mul_op_has_dst(inst->alu.mul.op) &&
+            !inst->alu.mul.magic_write &&
+            inst->alu.mul.waddr == waddr) {
+                return true;
+        }
+
+        if (v3d_qpu_sig_writes_address(devinfo, &inst->sig) &&
+            !inst->sig_magic && inst->sig_addr == waddr) {
+                return true;
+        }
+
+        return false;
+}
+
 bool
 v3d_qpu_sig_writes_address(const struct v3d_device_info *devinfo,
                            const struct v3d_qpu_sig *sig)

src/broadcom/qpu/qpu_instr.h

@@ -496,4 +496,7 @@ bool v3d_qpu_unpacks_f16(const struct v3d_qpu_instr *inst) ATTRIBUTE_CONST;
 bool v3d_qpu_is_nop(struct v3d_qpu_instr *inst) ATTRIBUTE_CONST;
 
 bool v3d71_qpu_reads_raddr(const struct v3d_qpu_instr *inst, uint8_t raddr);
+bool v3d71_qpu_writes_waddr_explicitly(const struct v3d_device_info *devinfo,
+                                       const struct v3d_qpu_instr *inst,
+                                       uint8_t waddr);
 #endif