diff options
Diffstat (limited to 'lib/libm/arch/mc68881/s_logbf.S')
| -rw-r--r-- | lib/libm/arch/mc68881/s_logbf.S | 58 |
1 files changed, 0 insertions, 58 deletions
diff --git a/lib/libm/arch/mc68881/s_logbf.S b/lib/libm/arch/mc68881/s_logbf.S deleted file mode 100644 index fa357e7aec9..00000000000 --- a/lib/libm/arch/mc68881/s_logbf.S +++ /dev/null @@ -1,58 +0,0 @@ -/* $OpenBSD: s_logbf.S,v 1.2 2013/02/02 13:29:14 miod Exp $ */ -/*- - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * the Systems Programming Group of the University of Utah Computer - * Science Department. - * - * 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. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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> - -| logbf(x) -| returns the unbiased exponent of x, a signed integer in single precision, -| except that logbf(0) is -INF, logbf(INF) is +INF, and logbf(NAN) is that NAN. -ENTRY(logbf) - movw %sp@(4),%d0 - movw #0x7F80,%d1 | exponent bits - andw %d1,%d0 | mask off all else - cmpw %d1,%d0 | max exponent? - bne Lfinite | no, is finite - fmoves %sp@(4),%fp0 | yes, infinite or NaN - fbun Ldone | NaN returns NaN - fabsx %fp0 | +-inf returns inf - jra Ldone -Lfinite: - fmoves %sp@(4),%fp0 | get entire number - fbne Lnonz | zero? - flog2x %fp0 | yes, log(0) a convenient source of -inf - jra Ldone -Lnonz: - fgetexpx %fp0 | get exponent -Ldone: - rts |