forked from luck/tmp_suning_uos_patched
9d5a634946
Based on 1 normalized pattern(s): this program is free software you can distribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 51 franklin st fifth floor boston ma 02110 1301 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 33 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190531081038.563233189@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
74 lines
1.7 KiB
C
74 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* IEEE754 floating point
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* double precision internal header file
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*/
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/*
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* MIPS floating point support
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* Copyright (C) 1994-2000 Algorithmics Ltd.
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*/
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#include <linux/compiler.h>
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#include "ieee754int.h"
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#define assert(expr) ((void)0)
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#define DP_EBIAS 1023
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#define DP_EMIN (-1022)
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#define DP_EMAX 1023
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#define DP_FBITS 52
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#define DP_MBITS 52
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#define DP_MBIT(x) ((u64)1 << (x))
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#define DP_HIDDEN_BIT DP_MBIT(DP_FBITS)
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#define DP_SIGN_BIT DP_MBIT(63)
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#define DPSIGN(dp) (dp.sign)
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#define DPBEXP(dp) (dp.bexp)
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#define DPMANT(dp) (dp.mant)
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static inline int ieee754dp_finite(union ieee754dp x)
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{
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return DPBEXP(x) != DP_EMAX + 1 + DP_EBIAS;
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}
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/* 3bit extended double precision sticky right shift */
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#define XDPSRS(v,rs) \
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((rs > (DP_FBITS+3))?1:((v) >> (rs)) | ((v) << (64-(rs)) != 0))
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#define XDPSRSX1() \
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(xe++, (xm = (xm >> 1) | (xm & 1)))
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#define XDPSRS1(v) \
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(((v) >> 1) | ((v) & 1))
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/* 32bit * 32bit => 64bit unsigned integer multiplication */
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#define DPXMULT(x, y) ((u64)(x) * (u64)y)
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/* convert denormal to normalized with extended exponent */
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#define DPDNORMx(m,e) \
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while ((m >> DP_FBITS) == 0) { m <<= 1; e--; }
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#define DPDNORMX DPDNORMx(xm, xe)
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#define DPDNORMY DPDNORMx(ym, ye)
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#define DPDNORMZ DPDNORMx(zm, ze)
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static inline union ieee754dp builddp(int s, int bx, u64 m)
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{
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union ieee754dp r;
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assert((s) == 0 || (s) == 1);
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assert((bx) >= DP_EMIN - 1 + DP_EBIAS
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&& (bx) <= DP_EMAX + 1 + DP_EBIAS);
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assert(((m) >> DP_FBITS) == 0);
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r.sign = s;
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r.bexp = bx;
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r.mant = m;
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return r;
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}
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extern union ieee754dp __cold ieee754dp_nanxcpt(union ieee754dp);
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extern union ieee754dp ieee754dp_format(int, int, u64);
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