《汇编语言 基于x86处理器》第十章结构和宏部分的代码
2021-06-28 17:04
标签：write lap type last 终端 reads 获取 输入 star ? 书中第十章的程序，主要讲了结构与宏的使用 ● 代码，使用结构，对比是否对齐的性能差距 ■ 输出结果，反复测试，时间差大概在 70 ms 左右 ● 调用 win32 API 显示时间，并放到终端中的指定位置 ● 使用宏包装以后的汇编 Wraps.asm，主要展示了 Macros.inc 的作用 《汇编语言 基于x86处理器》第十章结构和宏部分的代码 标签：write lap type last 终端 reads 获取 输入 star 原文地址：https://www.cnblogs.com/cuancuancuanhao/p/9648863.html 1 INCLUDE Irvine32.inc
2 INCLUDE macros.inc
3
4 structN STRUCT ; 非对齐的结构
5 Lastname BYTE 30 DUP(0) ; 30
6 Years WORD 0 ; 2
7 SalaryHistory DWORD 0, 0, 0, 0 ; 16
8 structN ENDS ; 48 Byte
9
10 structA STRUCT ; 对齐的结构
11 Lastname BYTE 30 DUP(0) ; 30
12 ALIGN WORD ; +2
13 Years WORD 0 ; 2
14 ALIGN DWORD ; +2
15 SalaryHistory DWORD 0, 0, 0, 0 ; 16
16 structA ENDS ; 52 Byte
17
18 .data
19 ALIGN DWORD ; 对齐到双字
20 startTime DWORD ?
21 empBad structN
22 emp structA
23
24 .code
25 main PROC
26 call GetMSeconds
27 mov startTime, eax
28 mov ecx, 0FFFFFFFFh
29 L1:
30 mov empBad.Years, 5
31 mov empBad.SalaryHistory, 35000
32 loop L1
33
34 call GetMSeconds
35 sub eax, startTime
36 mWrite "Time without align: "
37 call WriteDec
38 call Crlf
39
40 call GetMSeconds
41 mov startTime, eax
42 mov ecx, 0FFFFFFFFh
43 L2:
44 mov emp.Years, 5
45 mov emp.SalaryHistory, 35000
46 loop L2
47
48 call GetMSeconds ; get starting time
49 sub eax, startTime
50 mWrite "Time with align: "
51 call WriteDec ; display elapsed time
52 call Crlf
53
54 call WaitMsg
55 exit
56 main ENDP
57
58 END main
Time without align: 6999
Time with align: 6913
1 INCLUDE Irvine32.inc
2
3 COMMENT !
4 SmallWin.inc 中关于结构 COORD 和 SYSTEMTIME 的定义
5 COORD STRUCT
6 X WORD ?
7 Y WORD ?
8 COORD ENDS
9
10 SYSTEMTIME STRUCT
11 wYear WORD ?
12 wMonth WORD ?
13 wDayOfWeek WORD ?
14 wDay WORD ?
15 wHour WORD ?
16 wMinute WORD ?
17 wSecond WORD ?
18 wMilliseconds WORD ?
19 SYSTEMTIME ENDS
20 !
21
22 .data
23 sysTime SYSTEMTIME
24 XYPos COORD 10, 5>
25 consoleHandle DWORD ?
26 colonStr BYTE ":", 0
27 TheTimeIs BYTE "The time is ", 0
28
29 .code
30 main PROC
31 INVOKE GetStdHandle, STD_OUTPUT_HANDLE ; 获取标准输出句柄，返回值在 eax，转入变量 consoleHandle
32 mov consoleHandle, eax
33
34 INVOKE SetConsoleCursorPosition, consoleHandle, XYPos ; 设置终端光标位置
35
36 INVOKE GetLocalTime, ADDR sysTime ; 获取当前时间
37
38 movzx eax, sysTime.wHour ; 小时
39 call WriteDec
40 mov edx, offset colonStr ; ":"
41 call WriteString
42 movzx eax, sysTime.wMinute ; 分钟
43 call WriteDec
44 call WriteString ; ":"
45 movzx eax, sysTime.wSecond ; 秒
46 call WriteDec
47
48 call Crlf
49 call WaitMsg
50 exit
51 main ENDP
52
53 END main
1 INCLUDE Irvine32.inc
2 INCLUDE Macros.inc
3
4 .data
5 array DWORD 1, 2, 3, 4, 5, 6, 7, 8
6 string1 BYTE 31 DUP(?)
7 string2 BYTE 31 DUP(?)
8
9 .code
10 main PROC
11 mGotoxy 0, 0 ; 调整终端光标位置，并输出指定字符串
12 mWrite "Macro Program sample:", 0dh, 0ah>
13
14 mGotoxy 0, 5
15 mWrite "Go to Row 5, col 0.", 0dh, 0ah>
16 call Crlf
17
18 mWrite "Input string 1: " ; 输入两个字符串，然后一并输出
19 mReadString string1
20 call Crlf
21
22 mWrite "Input string 2:"
23 mReadString string2
24 call Crlf
25
26 mWrite "Output the strings:"
27 mWriteString string1
28 mWriteSpace
29 mWriteString string2
30 call Crlf
31
32 mDumpMem OFFSET array, LENGTHOF array, TYPE array ; 输出数组
33
34 call waitmsg
35 exit
36 main ENDP
37
38 END main