Reimplement the FSCALE version as C-with-assembler. (Make the compiler deal
with ABI crap.)
This commit is contained in:
mycroft
parent
04cd1cc8ee
commit
f784c98496
@ -1,4 +1,4 @@
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# $NetBSD: Makefile.inc,v 1.10 1999/08/29 18:08:30 mycroft Exp $
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# $NetBSD: Makefile.inc,v 1.11 1999/08/29 19:41:53 mycroft Exp $
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SRCS+= alloca.S fabs.S frexp.c infinity.c isinf.c isnan.c modf.S
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SRCS+= flt_rounds.S fpgetmask.S fpgetround.S fpgetsticky.S fpsetmask.S \
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@ -14,13 +14,12 @@ SRCS+= setjmp.S __setjmp14.S
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SRCS+= _setjmp.S
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SRCS+= sigsetjmp.S __sigsetjmp14.S
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.ifdef(M68040)
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SRCS+= ldexp.c
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.elifdef(M68060)
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SRCS+= ldexp.c
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.ifdef M68040
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SRCS+= ldexp_040.c
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.elifdef M68060
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SRCS+= ldexp_040.c
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.else
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SRCS+= ldexp.S
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SRCS+= ldexp_881.c
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.endif
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LSRCS+= Lint_bswap16.c Lint_bswap32.c Lint_bswap64.c
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DPSRCS+= Lint_bswap16.c Lint_bswap32.c Lint_bswap64.c
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@ -1,62 +0,0 @@
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/* $NetBSD: ldexp.S,v 1.6 1999/05/02 20:17:21 kleink Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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RCSID("from: @(#)ldexp.s 5.1 (Berkeley) 5/12/90")
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#else
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RCSID("$NetBSD: ldexp.S,v 1.6 1999/05/02 20:17:21 kleink Exp $")
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#endif
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#endif /* LIBC_SCCS and not lint */
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/*
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* double ldexp(val, exp)
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* returns: val * (2**exp), for integer exp
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*/
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ENTRY(ldexp)
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fmoved sp@(4),fp0
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fscalel sp@(12),fp0
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#ifndef __SVR4_ABI__
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fmoved fp0,sp@-
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movel sp@+,d0
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movel sp@+,d1
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#endif
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rts
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@ -1,152 +0,0 @@
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/* $NetBSD: ldexp.c,v 1.6 1999/08/29 19:04:03 mycroft Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Header: ldexp.c,v 1.1 91/07/07 04:28:19 torek Exp
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static const char sccsid[] = "@(#)ldexp.c 8.1 (Berkeley) 6/4/93";
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#else
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__RCSID("$NetBSD: ldexp.c,v 1.6 1999/08/29 19:04:03 mycroft Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include <sys/types.h>
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#include <machine/ieee.h>
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#include <errno.h>
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#include <math.h>
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/*
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* double ldexp(double val, int exp)
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* returns: val * (2**exp)
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*/
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double
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ldexp(val, exp)
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double val;
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int exp;
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{
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register int oldexp, newexp, mulexp;
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union {
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double v;
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struct ieee_double s;
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} u, mul;
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/*
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* If input is zero, or no change, just return input.
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* Likewise, if input is Inf or NaN, just return it.
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*/
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u.v = val;
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oldexp = u.s.dbl_exp;
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if (val == 0.0 || exp == 0 || oldexp == DBL_EXP_INFNAN)
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return (val);
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/*
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* Compute new exponent and check for over/under flow.
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* Underflow, unfortunately, could mean switching to denormal.
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* If result out of range, set ERANGE and return 0 if too small
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* or Inf if too big, with the same sign as the input value.
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*/
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newexp = oldexp + exp;
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if (newexp >= DBL_EXP_INFNAN) {
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/* u.s.dbl_sign = val < 0.0; -- already set */
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u.s.dbl_exp = DBL_EXP_INFNAN;
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u.s.dbl_frach = u.s.dbl_fracl = 0;
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errno = ERANGE;
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return (u.v); /* Inf */
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}
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if (newexp <= 0) {
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/*
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* The output number is either a denormal or underflows
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* (see comments in machine/ieee.h).
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*/
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if (newexp <= -DBL_FRACBITS) {
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errno = ERANGE;
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return (0.0);
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}
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/*
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* We are going to produce a denorm. Our `exp' argument
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* might be as small as -2097, and we cannot compute
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* 2^-2097, so we may have to do this as many as three
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* steps (not just two, as for positive `exp's below).
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*/
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mul.v = 1.0;
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while (exp <= -DBL_EXP_BIAS) {
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mul.s.dbl_exp = 1;
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val *= mul.v;
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exp += DBL_EXP_BIAS - 1;
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}
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mul.s.dbl_exp = exp + DBL_EXP_BIAS;
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val *= mul.v;
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return (val);
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}
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/*
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* Newexp is positive.
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*
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* If oldexp is zero, we are starting with a denorm, and simply
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* adjusting the exponent will produce bogus answers. We need
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* to fix that first.
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*/
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if (oldexp == 0) {
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/*
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* Multiply by 2^mulexp to make the number normalizable.
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* We cannot multiply by more than 2^1023, but `exp'
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* argument might be as large as 2046. A single
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* adjustment, however, will normalize the number even
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* for huge `exp's, and then we can use exponent
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* arithmetic just as for normal `double's.
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*/
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mulexp = exp <= DBL_EXP_BIAS ? exp : DBL_EXP_BIAS;
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mul.v = 1.0;
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mul.s.dbl_exp = mulexp + DBL_EXP_BIAS;
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val *= mul.v;
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if (mulexp == exp)
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return (val);
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u.v = val;
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newexp -= mulexp;
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}
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/*
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* Both oldexp and newexp are positive; just replace the
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* old exponent with the new one.
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*/
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u.s.dbl_exp = newexp;
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return (u.v);
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}
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68
lib/libc/arch/m68k/gen/ldexp_040.c
Normal file
68
lib/libc/arch/m68k/gen/ldexp_040.c
Normal file
@ -0,0 +1,68 @@
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/* $NetBSD: ldexp_040.c,v 1.1 1999/08/29 19:41:53 mycroft Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Charles M. Hannum.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
|
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: ldexp_040.c,v 1.1 1999/08/29 19:41:53 mycroft Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include <sys/types.h>
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#include <machine/ieee.h>
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#include <math.h>
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/*
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* ldexp(value, exp): return value * (2 ** exp).
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*/
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double
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ldexp(value, exp)
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double value;
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int exp;
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{
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double temp;
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#if __GNUC__ >= 2
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__asm ("fscale"
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: "=t" (temp)
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: "0" (value), "u" ((double)exp));
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#else
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__asm ("fscale; fstp %%st(1)"
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: "=f" (temp)
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: "f" (value), "0" ((double)exp));
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#endif
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return (temp);
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}
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62
lib/libc/arch/m68k/gen/ldexp_881.c
Normal file
62
lib/libc/arch/m68k/gen/ldexp_881.c
Normal file
@ -0,0 +1,62 @@
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/* $NetBSD: ldexp_881.c,v 1.1 1999/08/29 19:41:53 mycroft Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Charles M. Hannum.
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*
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* 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 the NetBSD
|
||||
* Foundation, Inc. and its contributors.
|
||||
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
||||
* contributors may be used to endorse or promote products derived
|
||||
* from this software without specific prior written permission.
|
||||
*
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||||
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
|
||||
*/
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||||
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||||
#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: ldexp_881.c,v 1.1 1999/08/29 19:41:53 mycroft Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include <sys/types.h>
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#include <machine/ieee.h>
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#include <math.h>
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/*
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||||
* ldexp(value, exp): return value * (2 ** exp).
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*/
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double
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ldexp(value, exp)
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double value;
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int exp;
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{
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double temp;
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__asm ("fscalel %2,%1"
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: "=f" (temp)
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: "0" (value), "g" (exp));
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return (temp);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user