29 		     FPU_REG const *b, u_char tagb, u_char signb,
36 int FPU_add(FPU_REG const *b, u_char tagb, int deststnr, int control_w)  in FPU_add()  argument
40 	u_char signb = getsign(b);  in FPU_add()
48 		expb = exponent(b);  in FPU_add()
55 			    FPU_u_add(a, b, dest, control_w, signa, expa, expb);  in FPU_add()
60 				diff = a->sigh - b->sigh;	/* This works only if the ms bits  in FPU_add()
63 					diff = a->sigl > b->sigl;  in FPU_add()
65 						diff = -(a->sigl < b->sigl);  in FPU_add()
71 				    FPU_u_sub(a, b, dest, control_w, signa,  in FPU_add()
75 				    FPU_u_sub(b, a, dest, control_w, signb,  in FPU_add()
97 		tagb = FPU_Special(b);  in FPU_add()
108 		FPU_to_exp16(b, &y);  in FPU_add()
110 		b = &y;  in FPU_add()
112 		expb = exponent16(b);  in FPU_add()
118 			return real_2op_NaN(b, tagb, deststnr, a);  in FPU_add()
123 	return add_sub_specials(a, taga, signa, b, tagb, signb,  in FPU_add()
130 	FPU_REG const *a, *b;  in FPU_sub()  local
140 		b = (FPU_REG *) rm;  in FPU_sub()
143 		b = &st(rm);  in FPU_sub()
151 	signb = getsign(b);  in FPU_sub()
163 		expb = exponent(b);  in FPU_sub()
171 			diff = a->sigh - b->sigh;	/* Works only if ms bits are identical */  in FPU_sub()
173 				diff = a->sigl > b->sigl;  in FPU_sub()
175 					diff = -(a->sigl < b->sigl);  in FPU_sub()
185 				    FPU_u_sub(a, b, dest, control_w, signa,  in FPU_sub()
197 				    FPU_u_sub(b, a, dest, control_w, sign, expb,  in FPU_sub()
203 			    FPU_u_add(a, b, dest, control_w, SIGN_POS, expa,  in FPU_sub()
208 			    FPU_u_add(a, b, dest, control_w, SIGN_NEG, expa,  in FPU_sub()
228 		tagb = FPU_Special(b);  in FPU_sub()
239 		FPU_to_exp16(b, &y);  in FPU_sub()
241 		b = &y;  in FPU_sub()
243 		expb = exponent16(b);  in FPU_sub()
251 			d1 = b;  in FPU_sub()
255 			d2 = b;  in FPU_sub()
258 			return real_2op_NaN(b, tagb, deststnr, d1);  in FPU_sub()
262 			return real_2op_NaN(b, tagb, deststnr, d2);  in FPU_sub()
265 	return add_sub_specials(a, taga, signa, b, tagb, signb ^ SIGN_NEG,  in FPU_sub()
271 		     FPU_REG const *b, u_char tagb, u_char signb,  in add_sub_specials()  argument
293 			reg_copy(b, dest);  in add_sub_specials()
294 			if ((tagb == TW_Denormal) && (b->sigh & 0x80000000)) {  in add_sub_specials()
324 		FPU_copy_to_regi(b, TAG_Special, deststnr);  in add_sub_specials()