scopy.s

ARM在Embest 下的 运用源码.可以直接在Embest下运行

#        AREA    SCopy, CODE, READONLY
.text
        .global strcopy
strcopy:                 
         /* r0 points to destination string
        	r1 points to source string */
        LDRB    r2, [r1],#1     /* load byte and update address */
        STRB    r2, [r0],#1     /* store byte and update address */
        CMP     r2, #0  		/* check for zero terminator */
        BNE     strcopy 		/* keep going if not */
        MOV     pc,lr           /* Return */

.end