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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>
63 lines
1.1 KiB
C
63 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* IEEE754 floating point arithmetic
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* double precision: common utilities
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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 "ieee754sp.h"
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#include "ieee754dp.h"
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static inline union ieee754dp ieee754dp_nan_fsp(int xs, u64 xm)
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{
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return builddp(xs, DP_EMAX + 1 + DP_EBIAS,
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xm << (DP_FBITS - SP_FBITS));
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}
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union ieee754dp ieee754dp_fsp(union ieee754sp x)
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{
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COMPXSP;
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EXPLODEXSP;
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ieee754_clearcx();
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FLUSHXSP;
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switch (xc) {
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case IEEE754_CLASS_SNAN:
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return ieee754dp_nanxcpt(ieee754dp_nan_fsp(xs, xm));
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case IEEE754_CLASS_QNAN:
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return ieee754dp_nan_fsp(xs, xm);
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case IEEE754_CLASS_INF:
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return ieee754dp_inf(xs);
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case IEEE754_CLASS_ZERO:
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return ieee754dp_zero(xs);
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case IEEE754_CLASS_DNORM:
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/* normalize */
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while ((xm >> SP_FBITS) == 0) {
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xm <<= 1;
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xe--;
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}
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break;
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case IEEE754_CLASS_NORM:
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break;
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}
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/*
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* Can't possibly overflow,underflow, or need rounding
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*/
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/* drop the hidden bit */
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xm &= ~SP_HIDDEN_BIT;
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return builddp(xs, xe + DP_EBIAS,
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(u64) xm << (DP_FBITS - SP_FBITS));
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}
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