168 #define prolog		R15	/*  bytes in  prolog  */  macro
210 	prolog = sub(#0, ptr_out);  define
222 	prolog &= lsr(mask, back);
237 	noprolog = bitsclr(prolog, #7);
238 	prolog = and(prolog, #31);  define
243 	kernel = sub(len, prolog);
244 	shift = asl(prolog, #3);
245 	star3 = and(prolog, #7);
249 	prolog = lsr(prolog, #3);  define
251 	ptr_out_p_32 = add(ptr_out, prolog);
261 	p1 = cmp.eq(prolog, #0);
262 	if(!p1.new) prolog = add(prolog, #1);
320 	p3 = sp1loop0(.Ldword_loop_prolog, prolog)