汇编语言标识

1:The .globl directive declares program labels that are accessible from external programs.

2:The control bus is used to synchronize the functions between the processor and the individual system  elements.

3:The data bus is used to move data between the processor and the external system elements.

4:The .ascii declarative is used to declare a text string using ASCII characters. 

  The string elements are predefined and placed in memory, with the starting memory location denoted by the label output.

.ascii           Text string
.asciz          Null-terminated text string
.byte           Byte value
.double       Double-precision floating-point number
.float           Single-precision floating-point number
.int              32-bit integer number
.long           32-bit integer number (same as .int)
.octa           16-byte integer number
.quad           8-byte integer number
.short          16-bit integer number
.single         Single-precision floating-point number (same as .float)