182 #define prolog		R15	/*  bytes in  prolog  */  macro
224 	prolog = sub(#0, ptr_out);  define
236 	prolog &= lsr(mask, back);
251 	noprolog = bitsclr(prolog, #7);
252 	prolog = and(prolog, #31);  define
257 	kernel = sub(len, prolog);
258 	shift = asl(prolog, #3);
259 	star3 = and(prolog, #7);
263 	prolog = lsr(prolog, #3);  define
265 	ptr_out_p_32 = add(ptr_out, prolog);
275 	p1 = cmp.eq(prolog, #0);
276 	if(!p1.new) prolog = add(prolog, #1);
334 	p3 = sp1loop0(.Ldword_loop_prolog, prolog)