103 lines
3.2 KiB
C
103 lines
3.2 KiB
C
/*-
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* Copyright (c) 1998 Doug Rabson
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* $FreeBSD$
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*/
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#define S_FORMAT 0 /* IEEE single */
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#define T_FORMAT 2 /* IEEE double */
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#define Q_FORMAT 3 /* 64 bit fixed */
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#define ROUND_CHOP 0 /* truncate fraction */
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#define ROUND_MINUS_INF 1 /* round to -INF */
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#define ROUND_NORMAL 2 /* round to nearest */
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#define ROUND_PLUS_INF 3 /* round to +INF */
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typedef union fp_register {
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struct {
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u_int64_t fraction: 52;
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u_int64_t exponent: 11;
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u_int64_t sign: 1;
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} t;
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u_int64_t q;
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} fp_register_t;
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fp_register_t
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ieee_add(fp_register_t fa, fp_register_t fb,
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int src, int rnd,
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u_int64_t control, u_int64_t *status);
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fp_register_t
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ieee_sub(fp_register_t fa, fp_register_t fb,
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int src, int rnd,
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u_int64_t control, u_int64_t *status);
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fp_register_t
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ieee_mul(fp_register_t fa, fp_register_t fb,
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int src, int rnd,
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u_int64_t control, u_int64_t *status);
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fp_register_t
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ieee_div(fp_register_t fa, fp_register_t fb,
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int src, int rnd,
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u_int64_t control, u_int64_t *status);
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fp_register_t
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ieee_cmpun(fp_register_t fa, fp_register_t fb, u_int64_t *status);
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fp_register_t
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ieee_cmpeq(fp_register_t fa, fp_register_t fb, u_int64_t *status);
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fp_register_t
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ieee_cmplt(fp_register_t fa, fp_register_t fb, u_int64_t *status);
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fp_register_t
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ieee_cmple(fp_register_t fa, fp_register_t fb, u_int64_t *status);
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fp_register_t
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ieee_convert_S_T(fp_register_t f, int rnd,
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u_int64_t control, u_int64_t *status);
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fp_register_t
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ieee_convert_T_S(fp_register_t f, int rnd,
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u_int64_t control, u_int64_t *status);
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fp_register_t
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ieee_convert_Q_T(fp_register_t f, int rnd,
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u_int64_t control, u_int64_t *status);
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fp_register_t
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ieee_convert_Q_S(fp_register_t f, int rnd,
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u_int64_t control, u_int64_t *status);
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fp_register_t
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ieee_convert_T_Q(fp_register_t f, int rnd,
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u_int64_t control, u_int64_t *status);
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fp_register_t
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ieee_convert_S_Q(fp_register_t f, int rnd,
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u_int64_t control, u_int64_t *status);
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