ARM SDT下汇编到GNU汇编的转换

将ARM SDT下的汇编码移植到GCC for ARM编译器时，经常要做如下修改：
1、注释行以“@”或“”代替“;” <wbr><br>2、伪操作符替换： <wbr><br>INCLUDE 替换成 .INCLUDE <wbr><br>TCLK2<wbr> EQU<wbr> PB25 替换成<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> .equ<wbr> TCLK2, PB25 <wbr><br>EXPORT 替换成 .global <wbr><br>IMPORT 替换成 .extern <wbr><br>DCD 替换成 .long <wbr><br>IF :DEF: 替换成<wbr> .IFDEF <wbr><br>ELSE 替换成 .ELSE <wbr><br>ENDIF 替换成 .ENDIF <wbr><br>:OR: 替换成 | <wbr><br>:SHL: 替换成 &lt;&lt; <wbr><br><br>END<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> 替换成<wbr><wbr><wbr><wbr><wbr> .end <wbr><br>符号定义加"："号 <wbr><br><br>AREA Word, CODE, READONLY --&gt; .text <wbr><br>AREA Block, DATA, READWRITE --&gt; .data <wbr><br>CODE32 --&gt; .arm <wbr><br>CODE16 --&gt; .thumb <wbr><br>LTORG --&gt; .ltorg <wbr><br>% --&gt; .fill <wbr><br><br>3、操作数及运算符号替换 <wbr><br>ldr pc, [pc, #&amp;18]<wbr> 替换成<wbr><wbr> ldr<wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

第二部分

将ARM ADS下的汇编码移植到GCC for ARM编译器时，有如下规则：

1, 注释行以"@"或"/* ... */"代替";"

2, GET或INCLUDE => .INCLUDE
如：get option.a => .include "option.a"

3, EQU => .equ
TCLK2 EQU PB25 => .equ TCLK2, PB25
SETA ==> .equ
SETL ==> .equ

BUSWIDTH SETA 16 => .equ BUSWIDTH, 16

4, EXPORT => .global
IMPORT => .extern
GBLL => .global
GBLA => .global

5, DCD => .long

6, IF :DEF: => .IFDEF
ELSE => .ELSE
ENDIF => .ENDIF
:OR: => |
:SHL: => <<

7, END =>.end
NOTE:在被include的头文件中，如"option.a"中，不再需要.end，否则会导致主汇编程序结束。

8, 符号定义加"："号
Entry => Entry:
AREA Word, CODE, READONLY ==> .text
AREA Block, DATA, READWRITE ==> .data
CODE32 ==> .arm
CODE16 ==> .thumb

9, MACRO ==> .macro
MEND ==> .endm