diff options
Diffstat (limited to 'lib/libc/ia64/string/ffs.S')
| -rw-r--r-- | lib/libc/ia64/string/ffs.S | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/lib/libc/ia64/string/ffs.S b/lib/libc/ia64/string/ffs.S deleted file mode 100644 index d99d765..0000000 --- a/lib/libc/ia64/string/ffs.S +++ /dev/null @@ -1,99 +0,0 @@ -/* $NetBSD: ffs.S,v 1.3 1996/10/17 03:08:13 cgd Exp $ */ - -/* - * Copyright (c) 1995 Christopher G. Demetriou - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by Christopher G. Demetriou - * for the NetBSD Project. - * 4. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include <machine/asm.h> -__FBSDID("$FreeBSD$"); - -ENTRY(ffs, 1) - sxt4 r14=in0 ;; - cmp.eq p6,p0=r14,r0 -(p6) br.dpnt.few Lallzero - - /* - * Initialize return value (ret0), and set up r15 so that it - * contains the mask with only the lowest bit set. - */ - sub r15=r0,r14 - mov ret0=1 ;; - and r15=r14,r15 ;; - - extr.u r16=r15,0,8 ;; - cmp.ne p6,p0=r0,r16 -(p6) br.dptk.few Ldo8 - - /* - * If lower 16 bits empty, add 16 to result and use upper 16. - */ - extr.u r16=r15,0,16 ;; - cmp.ne p6,p0=r0,r16 -(p6) br.dptk.few Ldo16 - extr.u r15=r15,16,16 - add ret0=16,ret0 ;; - -Ldo16: - /* - * If lower 8 bits empty, add 8 to result and use upper 8. - */ - extr.u r16=r15,0,8 ;; - cmp.ne p6,p0=r0,r16 -(p6) br.dptk.few Ldo8 - extr.u r15=r15,8,24 - add ret0=8,ret0 ;; - -Ldo8: - and r16=0x0f,r15 /* lower 4 of 8 empty? */ - and r17=0x33,r15 /* lower 2 of each 4 empty? */ - and r18=0x55,r15 ;; /* lower 1 of each 2 empty? */ - cmp.ne p6,p0=r16,r0 - cmp.ne p7,p0=r17,r0 - cmp.ne p8,p0=r18,r0 - - /* If lower 4 bits empty, add 4 to result. */ -(p6) br.dptk.few Ldo4 - add ret0=4,ret0 ;; - -Ldo4: /* If lower 2 bits of each 4 empty, add 2 to result. */ -(p7) br.dptk.few Ldo2 - add ret0=2,ret0 ;; - -Ldo2: /* If lower bit of each 2 empty, add 1 to result. */ -(p8) br.dptk.few Ldone - add ret0=1,ret0 - -Ldone: - br.ret.sptk.few rp - -Lallzero: - mov ret0=0 - br.ret.sptk.few rp -END(ffs) |
