lab3.asm

几个TMS320C54xx的程序

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* lab3.asm      y= a1*x1+a2*x2+a3*x3+a4*x4  *
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        .title   "lab3.asm"
	.mmregs
STACK   .usect   "STACK",10h      ;allocate space for stack
        .bss     x,4              ;allocate 9 word for variates
        .bss     a,4                              
        .bss     y,1
        .def     _main,_int_2
        .data                                     
table:  .word    1,2,3,4          ;data follows ...
        .word    8,6,4,2
        .text                     ;code follows ...
_main:  STM      #STACK+10h,SP    ;set stack pointer 
        STM      #table,AR1       ;AR1 point to table
        STM      #x,AR2           ;AR2 point to x
        STM      #7,AR0
        LD       #0,A
	STM	 #0,SWWSR
	RSBX	 INTM
	STM	 #04h,IMR
loop:   LD       *AR1+,A          ;move 8 values
        STL      A,*AR2+          ;from program memory
        BANZ     loop,*AR0-       ;into data memory
        CALL     SUM              ;call SUM subrotine
end:    B        end
SUM:    STM      #a,AR3           ;The subrotine lmplememt
        STM      #x,AR4           ;multiply--accumulate
        RPTZ     A,#3
        MAC      *AR3+,*AR4+,A
        STL      A,@y
        RET
_int_2:	nop
		NEG A
		LD #0X5555,B
		nop
		RETE
       .end