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# FIR Filtering: Basic Assembly Exercise for TI TMS320C54x (中文版 Chinese Version)

Summary: You will work through a section of TI TMS320C54x assembly code by hand. The instructions include multiplication of fractional numbers in two's complement representation.

## 汇编练习



1  FIR_len .set    3
2
3  ; Assume:
4  ;   BK = 3
5  ;   AR0 = 1
6  ;   AR2 = 1000h
7  ;   AR3 = 1004h
8  ;
9  ;   FRCT = 1
10
11      stl     A,*AR3+%
12      rptz    A,(FIR_len-1)
13      mac     *AR2+0%,*AR3+0%,A



### Example 1

1000h 和0x1000 均表示十进制数值4096。

Figure 2: 执行结果
A AR2 AR3
00 0000 8000h 1000h 1004h at start of code
after stl instruction
after rptz instruction
after first mac instruction
after second mac instruction
after third mac instruction

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