无符号长整数的4则运算子程序

子程序名称分别为ULADD，ULSUB，ULMUL，ULDIV

可以计算x+y,x-y,x*y,x/y

其中x的值放入R0R1R2R3，y的值放入R4R5R6R7

结果在R4R5R6R7中，其中除法的余数在R0R1R2R3中-Unsigned long integer arithmetic subroutine subroutine name four were ULADD, ULSUB, ULMUL, ULDIV can calculate x+y, xy, x* y, x/y where x is the value placed R0R1R2R3, the value of y into R4R5R6R7 results In R4R5R6R7, where the remainder of the division in R0R1R2R3