.global arcfour_gen
;== arcfour_gen ==
-; this function initialises the context
+; this function generates a keystream byte
; param1: 16-bit pointer to a ctx struct
; given in r25,r24
st Z+, r19 /* i,j loaded&saved; X->S[i]; Z->S[0]; r20=S[i] */
add r30, r19
adc r31, r1
- ld r21, Z /* X->S[i]; Z->S[j]; r20=S[i]; r21=S[j]*/
+ ld r21, Z /* X->S[i]; Z->S[j]; r20=S[i]; r21=S[j] */
st Z, r20
st X, r21
add r20, r21