29   mp_size_t usize, vsize, rsize;  in mpf_sub()  local
37   vsize = v->_mp_size;  in mpf_sub()
45   if (vsize == 0)  in mpf_sub()
53   if ((usize ^ vsize) < 0)  in mpf_sub()
56       v_negated._mp_size = -vsize;  in mpf_sub()
75       vsize = v->_mp_size;  in mpf_sub()
79   vsize = ABS (vsize);  in mpf_sub()
95 	  if (up[usize - 1] == vp[vsize - 1])  in mpf_sub()
101 		  vsize--;  in mpf_sub()
110                       while (vsize != 0 && vp[vsize - 1] == 0)  in mpf_sub()
112                           vsize--;  in mpf_sub()
115 		      if (vsize > prec)  in mpf_sub()
117 			  vp += vsize - prec;  in mpf_sub()
118 			  vsize = prec;  in mpf_sub()
120                       MPN_COPY_INCR (rp, vp, vsize);  in mpf_sub()
121                       rsize = vsize;  in mpf_sub()
124 		  if (vsize == 0)  in mpf_sub()
127                       vsize = usize;  in mpf_sub()
131 	      while (up[usize - 1] == vp[vsize - 1]);  in mpf_sub()
134 	  if (up[usize - 1] < vp[vsize - 1])  in mpf_sub()
140 	      MPN_SRCPTR_SWAP (up,usize, vp,vsize);  in mpf_sub()
148 	  if (up[usize - 1] != vp[vsize - 1] + 1)  in mpf_sub()
151 	  vsize--;  in mpf_sub()
160 	  if (up[usize - 1] != 1 || vp[vsize - 1] != GMP_NUMB_MAX  in mpf_sub()
169       while (vsize != 0 && usize != 0 && up[usize - 1] == 0  in mpf_sub()
170 	     && vp[vsize - 1] == GMP_NUMB_MAX)  in mpf_sub()
173 	  vsize--;  in mpf_sub()
179 	  while (vsize != 0 && vp[vsize - 1] == GMP_NUMB_MAX)  in mpf_sub()
181 	      vsize--;  in mpf_sub()
191       if (vsize > prec - 1)  in mpf_sub()
193 	  vp += vsize - (prec - 1);  in mpf_sub()
194 	  vsize = prec - 1;  in mpf_sub()
200 	if (vsize == 0)  in mpf_sub()
214 	    size = vsize;  in mpf_sub()
217 	    cy_limb = 1 - mpn_add_1 (tp, tp, vsize, (mp_limb_t) 1);  in mpf_sub()
218 	    rsize = vsize;  in mpf_sub()
227 	if (usize >= vsize)  in mpf_sub()
232 	    size = usize - vsize;  in mpf_sub()
234 	    cy_limb = mpn_sub_n (tp + size, up + size, vp, vsize);  in mpf_sub()
242 	    size = vsize - usize;  in mpf_sub()
247 	    cy_limb-= mpn_add_1 (tp, tp, vsize, (mp_limb_t) 1);  in mpf_sub()
248 	    rsize = vsize;  in mpf_sub()
270   if (vsize + ediff > prec)  in mpf_sub()
272       vp += vsize + ediff - prec;  in mpf_sub()
273       vsize = prec - ediff;  in mpf_sub()
293 	  if (vsize == 0)  in mpf_sub()
301 	  vp++, vsize--;  in mpf_sub()
307 	      MPN_COPY (rp, vp, vsize);  in mpf_sub()
308 	      rsize = vsize;  in mpf_sub()
327 	      if (usize >= vsize)  in mpf_sub()
332 		  size = usize - vsize;  in mpf_sub()
334 		  mpn_sub_n (tp + size, up + size, vp, vsize);  in mpf_sub()
342 		  size = vsize - usize;  in mpf_sub()
348 		  rsize = vsize;  in mpf_sub()
353 	      if (vsize + ediff <= usize)  in mpf_sub()
358 		  size = usize - ediff - vsize;  in mpf_sub()
360 		  mpn_sub (tp + size, up + size, usize - size, vp, vsize);  in mpf_sub()
368 		  size = vsize + ediff - usize;  in mpf_sub()
374 		  rsize = vsize + ediff;  in mpf_sub()
383 	  size = vsize + ediff - usize;  in mpf_sub()
385 	  for (i = 1; i < vsize; i++)  in mpf_sub()
387 	  for (i = vsize; i < size; i++)  in mpf_sub()