IBM大型机汇编语言

目录 1. 预备与基础知识 .......................................................................................................................... 5 1.1 PSW & Real Address and Virtual Address ........................................................................... 5 1.1.1PSW（Program Status Word） ................................................................................ 5 1.1.2Virtual Address: ......................................................................................................... 5 1.2 EBCDIC 码 ........................................................................................................................... 6 1.3 数的表示、转换与计算 ................................................................................................... 6 1.3.1字符数据 .................................................................................................................. 6 1.3.2二进制数 .................................................................................................................. 7 1.3.3逻辑数 ...................................................................................................................... 8 1.3.4十进制数 .................................................................................................................. 8 1.4 主机环境下汇编语言源程序→可执行模块流程 ........................................................... 9 1.5 什么是主程序？什么是子程序？ ................................................................................... 9 1.6 汇编程序书写格式与样本 ............................................................................................. 10 1.6.1汇编控制语句：START、END .......................................................................... 10 1.6.2汇编控制语句：USING指令 .............................................................................. 10 1.7 关于地址: 基地址、变址与相对地址 .......................................................................... 11 1.8 寄存器的约定 ................................................................................................................. 11 1.9 常数的定义 ..................................................................................................................... 12 1.9.1数据区域的定义 .................................................................................................... 12 1.9.2常数的定义 ............................................................................................................ 13 1.10 指令格式与类型: 指令格式与类型例子 .................................................................... 18 2. Sequential Input & Output .......................................................................................................... 19 2.1 分析一个带有输出文件的汇编语言程序 ..................................................................... 19 2.2 有关输入／出的宏指令 ................................................................................................. 20 2.2.1 OPEN .............................................................................................................................. 21 2.2.2 CLOSE ..................................................................................................................... 21 2.2.3GET（读） & PUT（写） ...................................................................................... 21 2.3关于ORG, EQU, PRINT等指令的介绍 ............................................................................ 23 2.3.1 ORG语句（置地址计数器） ................................................................................ 23 2.3.2 EQU “等价”指令，格式：name EQU constant ............................................... 24 2.3.3 PRINT 操作数 ........................................................................................................ 24 2.4 什么是保护区？以及关于STM, LM 指令的介绍 ...................................................... 24 3.编程 Move，Comparing& Branching ........................................................................................ 28 3.1 MOVE：MVC，MVI ，MVZ，MVN ................................................................................ 28 3.1.1字符传送指令MVC D1(L1,B1),D2(B2) ............................................................. 28 3.1.2直接传送指令：MVI D1(B1),I2 .................................................................... 29 3.1.3MVZ、MVN D1(B1),D2(B2) ..................................................................................... 29 3.2逻辑比较指令： ............................................................................................................... 31 3.2.1CLC D1(L,B1),D2(B2) ................................................................................................ 31 3.2.2直接数逻辑比较指令：CLI.................................................................................. 32 3.2.3 十进制比较CP D1(L1,B1),D2(L2,B2) .................................................................... 33 3.3 MVCL R1,R2 长传送 ...................................................................................................... 33 2 3 IBM 大型机汇编语言 3.4CLCL R1,R2 两域比较 ........................................................................................................ 35 3.4 Branching逻辑比较转移，算术运算转移及条件转移 ............................................... 37 3.4.1算术运算转移 ........................................................................................................ 37 3.4.2逻辑比较转移 ........................................................................................................ 37 3.4.3条件转移：BC、BCR .......................................................................................... 37 4. 编程：Packed Decimal .............................................................................................................. 39 4.1 压缩十进制运算 ............................................................................................................. 39 4.1.1．十进制加法指令AP ........................................................................................... 39 4.1.2．十进制减法指令SP ............................................................................................ 39 4.1.3．清零及加十进制指令ZAP： .............................................................................. 40 4.1.4．比较十进制指令CP ........................................................................................... 41 4.1.5十进制乘法指令MP： ......................................................................................... 42 4.1.6十进制除法指令DP .............................................................................................. 43 4.2 PACK & UNPK .................................................................................................................... 44 4.2.1PACK A,B .................................................................................................................. 44 4.2.2拆卸：UNPK ........................................................................................................ 45 4.2.3指令：OI （“或”） ............................................................................................... 46 4.3SRP（ 压缩十进数的舍入移位）（Shift & Round Packed） ......................................... 47 5.编程Table Handling& Editing ..................................................................................................... 47 5.1 LA ...................................................................................................................................... 47 5.2 BCT / BCTR 计数转 ........................................................................................................... 48 5.3 ED / EDMK 编辑 ............................................................................................................... 49 5.3.1编辑指令：ED ...................................................................................................... 49 5.3.2编辑并说明：EDMK ............................................................................................ 50 6.编程Binary Arithmetic &Tables ................................................................................................... 53 6.1 有关Binary Arithmetic 指令 .......................................................................................... 53 6.1.1 L 指令 ................................................................................................................. 53 6.1.2寄存器装载LR ....................................................................................................... 54 6.1.3多寄存器恢复指令LM .......................................................................................... 56 6.1.4多寄存器保存指令STM........................................................................................ 57 6.1.5存储指令ST ........................................................................................................... 58 6.2二进制数（算术）运算 ................................................................................................... 59 6.2.1CVB &CVD 指令 ...................................................................................................... 60 6.2.2 A 、AH 、AR 二进数“加”指令 ........................................................................... 61 6.2.3 S、SH 、SR 二进数“减”指令 .............................................................................. 63 6.2.4 M、MH 、MR 二进数“乘”指令 ............................................................................ 64 6.2.5 D、DR 二进数“除”指令 ........................................................................................ 65 6.3比较指令 ........................................................................................................................... 66 6.3.1 C,CB,CR ................................................................................................................... 66 6.3.2变址器比较指令BXLE,BXH ................................................................................... 68 6.3.3 插入与存入字符IC、STC ..................................................................................... 71 6.3.4屏蔽插入与存入字符ICM,STCM .......................................................................... 73 7编程Shifting，Boolean &Bit Operations .................................................................................... 77 7.1 SHIFT 移位指令 ................................................................................................................ 77 3 4 IBM 大型机汇编语言 7.1.1．逻辑左移单寄存器指令SLL ............................................................................... 78 7.1.2．逻辑右移单寄存器指令SRL： .......................................................................... 78 7.1.3．逻辑左移双寄存器指令SLDL ............................................................................ 78 7.1.4．逻辑右移双寄存器指令SRDL ............................................................................ 79 7.1.5算术左移单寄存器指令SLA ................................................................................. 82 7.1.6．算术右移寄存器指令SRA ................................................................................. 83 7.1.7．算术左移双寄存器指令SLDA ............................................................................ 83 7.2 有关Boolean 指令 ......................................................................................................... 86 7.3 有关Bit Operations指令 ................................................................................................ 89 8编程Subroutines&Macros .......................................................................................................... 92 8.1内部子程序 ....................................................................................................................... 92 8.1.1 BAL（内部）子程序 .............................................................................................. 92 8.1.2BALR（外部）子程序 ............................................................................................ 93 8.2 子程序参数传递 .............................................................................................................. 95 8.2.1调用序列的约定方法 ............................................................................................ 95 8.2.2参数地址区的约定方法 ........................................................................................ 96 8.3 宏指令介绍 ....................................................................................................................... 97 •8.3.1宏指令与子程序的区别： ................................................................................... 97 8.3.2宏指令的形式 ......................................................................................................... 97 8.3.3符号参数 ................................................................................................................ 97 8.3.4宏定义及宏调用 .................................................................................................. 100 8.3.5关于宏的两个例子 .............................................................................................. 107 4