diff options
author | Jennifer Averett <jennifer.averett@oarcorp.com> | 2023-05-05 21:39:16 +0300 |
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committer | Joel Sherrill <joel@rtems.org> | 2023-05-16 17:05:36 +0300 |
commit | c630a6a837fd581d741fb94602aed6a4a5ed9bf4 (patch) | |
tree | be4cb97e5ba955b52a52b36e2c626d3b7c525f51 /newlib/libm/ld/s_frexpl.c | |
parent | 41fdb869f9984ca2f8600aaa980b4ed2eae2e980 (diff) |
newlib: Add FreeBSD files for non LDBL_EQ_DBL support
FreeBSD files to add long double support for i386,
aarch64 and x86_64.
Diffstat (limited to 'newlib/libm/ld/s_frexpl.c')
-rw-r--r-- | newlib/libm/ld/s_frexpl.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/newlib/libm/ld/s_frexpl.c b/newlib/libm/ld/s_frexpl.c new file mode 100644 index 000000000..66e284fdd --- /dev/null +++ b/newlib/libm/ld/s_frexpl.c @@ -0,0 +1,64 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD + * + * Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG> + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. + * + * $FreeBSD$ + */ + +#include <float.h> +#include <math.h> + +#include "fpmath.h" + +#if LDBL_MAX_EXP != 0x4000 +#error "Unsupported long double format" +#endif + +long double +frexpl(long double x, int *ex) +{ + union IEEEl2bits u; + + u.e = x; + switch (u.bits.exp) { + case 0: /* 0 or subnormal */ + if ((u.bits.manl | u.bits.manh) == 0) { + *ex = 0; + } else { + u.e *= 0x1.0p514; + *ex = u.bits.exp - 0x4200; + u.bits.exp = 0x3ffe; + } + break; + case 0x7fff: /* infinity or NaN; value of *ex is unspecified */ + break; + default: /* normal */ + *ex = u.bits.exp - 0x3ffe; + u.bits.exp = 0x3ffe; + break; + } + return (u.e); +} |