1 /* $NetBSD: qp.c,v 1.4 2022/10/05 10:28:19 nia Exp $ */
2
3 /*-
4 * Copyright (c) 2014 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Matt Thomas of 3am Software Foundry.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31 #include <sys/cdefs.h>
32
33 #include "milieu.h"
34 #include "softfloat.h"
35
36 /*
37 * This file provides wrappers for the softfloat functions. We can't use
38 * invoke them directly since long double arguments are passed in FP/SIMD
39 * as well as being returned in them while float128 arguments are passed
40 * in normal registers.
41 *
42 * XXX: we're using compiler_rt for this now. Only one function remains
43 * that is missing from compiler_rt.
44 */
45
46 long double __negtf2(long double);
47
48 union sf_ieee_flt_u {
49 float fltu_f;
50 float32 fltu_f32;
51 };
52
53 union sf_ieee_dbl_u {
54 double dblu_d;
55 float64 dblu_f64;
56 };
57
58 union sf_ieee_ldbl_u {
59 long double ldblu_ld;
60 float128 ldblu_f128;
61 };
62
63 long double
__negtf2(long double ld_a)64 __negtf2(long double ld_a)
65 {
66 const union sf_ieee_ldbl_u zero = { .ldblu_ld = 0.0 };
67 const union sf_ieee_ldbl_u a = { .ldblu_ld = ld_a };
68 const union sf_ieee_ldbl_u b = {
69 .ldblu_f128 = float128_div(zero.ldblu_f128, a.ldblu_f128)
70 };
71
72 return b.ldblu_ld;
73 }
74