/* (c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands. See the copyright notice in the ACK home directory, in the file "Copyright". */ /* $Header: /cvsup/minix/src/lib/float/cfu.c,v 1.1.1.1 2005/04/21 14:56:10 beng Exp $ */ /* CONVERT FLOAT TO UNSIGNED (CFU m n) N.B. The caller must know what it is getting. A LONG is always returned. If it is an integer the high byte is cleared first. */ #include "FP_trap.h" #include "FP_types.h" long cfu(ds,ss,src) int ds; /* destination size (2 or 4) */ int ss; /* source size (4 or 8) */ DOUBLE src; /* assume worst case */ { EXTEND buf; long new; short newint, max_exp; extend(&src.d[0],&buf,ss); /* get extended format */ if (buf.exp < 0) { /* no conversion needed */ src.d[ss == 8] = 0L; return(0L); } max_exp = (ds << 3) - 1; if (buf.exp > max_exp) { trap(EIOVFL); /* integer overflow */ buf.exp %= max_exp; } new = buf.m1 >> (31-buf.exp); done: src.d[ss == 8] = new; return(new); }