1/* $NetBSD: fixunstfsi_ieee754.c,v 1.3 2024/01/05 09:41:58 rin Exp $ */ 2/*- 3 * Copyright (c) 2011 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Matt Thomas of 3am Software Foundry. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include <sys/cdefs.h> 32 33#if defined(LIBC_SCCS) && !defined(lint) 34__RCSID("$NetBSD: fixunstfsi_ieee754.c,v 1.3 2024/01/05 09:41:58 rin Exp $"); 35#endif /* LIBC_SCCS and not lint */ 36 37#include <stdbool.h> 38#include <stddef.h> 39#include <stdint.h> 40#include <float.h> 41#include <machine/ieee.h> 42 43#ifdef SOFTFLOAT 44#include "softfloat/softfloat-for-gcc.h" 45#endif 46 47#if defined(__x86_64__) || defined(__i486__) 48#define FIXUNS __fixunsxfsi 49#else 50#define FIXUNS __fixunstfsi 51#endif 52 53uint32_t __fixunsgen32(int, bool, size_t, size_t, const uint32_t *); 54 55uint32_t FIXUNS(long double); 56 57/* 58 * Convert long double to (unsigned) int. All operations are done module 2^32. 59 */ 60uint32_t 61FIXUNS(long double x) 62{ 63 const union ieee_ext_u extu = { .extu_ld = x }; 64 uint32_t frac[(EXT_FRACBITS + 31)/32 + 1]; 65 66 frac[0] = 0; 67 68 EXT_TO_ARRAY32(extu, &frac[1]); 69 70 return __fixunsgen32( 71 extu.extu_ext.ext_exp - EXT_EXP_BIAS, 72 extu.extu_ext.ext_sign != 0, 73 LDBL_MANT_DIG, 74 EXT_FRACHBITS, 75 &frac[__arraycount(frac)-1]); 76} 77