@ CHECK-ERRORS: error: invalid operand for instruction
@ CHECK-ERRORS: lsls r4, r5, #32
@ CHECK-ERRORS: ^
+
+@ Mismatched source/destination operands for MUL instruction.
+ muls r1, r2, r3
+@ CHECK-ERRORS: error: destination register must match second source register
+@ CHECK-ERRORS: muls r1, r2, r3
+@ CHECK-ERRORS: ^