/* (c) copyright 1989 by the Vrije Universiteit, Amsterdam, The Netherlands. See the copyright notice in the ACK home directory, in the file "Copyright". */ /* $Id$ */ #include "flt_misc.h" int flt_b64_add(e1,e2) register struct flt_mantissa *e1,*e2; { int overflow; int carry; /* add higher pair of 32 bits */ overflow = ucmp((long)0xFFFFFFFF - e1->flt_h_32, e2->flt_h_32) < 0; e1->flt_h_32 += e2->flt_h_32; /* add lower pair of 32 bits */ carry = ucmp((long)0xFFFFFFFF - e1->flt_l_32, e2->flt_l_32) < 0; e1->flt_l_32 += e2->flt_l_32; if ((carry) && ((++e1->flt_h_32 &~0xFFFFFFFF) || e1->flt_h_32 == 0)) { e1->flt_h_32 = 0; return(1); /* had a 64 bit overflow */ } return(overflow); /* return status from higher add */ }