1 /*- 2 * Copyright (c) 1992 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * %sccs.include.redist.c% 10 */ 11 12 #if defined(LIBC_SCCS) && !defined(lint) 13 static char sccsid[] = "@(#)lshldi3.c 5.6 (Berkeley) 06/21/92"; 14 #endif /* LIBC_SCCS and not lint */ 15 16 #include "quad.h" 17 18 /* 19 * Shift an (unsigned) quad value left (logical shift left). 20 * This is the same as arithmetic shift left! 21 */ 22 quad 23 __lshldi3(quad a, qshift_t shift) 24 { 25 union uu aa; 26 27 aa.q = a; 28 if (shift >= LONG_BITS) { 29 aa.ul[H] = shift >= QUAD_BITS ? 0 : 30 aa.ul[L] << (shift - LONG_BITS); 31 aa.ul[L] = 0; 32 } else if (shift > 0) { 33 aa.ul[H] = (aa.ul[H] << shift) | 34 (aa.ul[L] >> (LONG_BITS - shift)); 35 aa.ul[L] <<= shift; 36 } 37 return (aa.q); 38 } 39