From 16f504a9dca3fe3b70568f67b7d41241ae485288 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 18:49:04 +0200 Subject: Adding upstream version 7.0.6-dfsg. Signed-off-by: Daniel Baumann --- src/libs/softfloat-3e/source/extF80_log2.c | 80 ++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 src/libs/softfloat-3e/source/extF80_log2.c (limited to 'src/libs/softfloat-3e/source/extF80_log2.c') diff --git a/src/libs/softfloat-3e/source/extF80_log2.c b/src/libs/softfloat-3e/source/extF80_log2.c new file mode 100644 index 00000000..7b028ece --- /dev/null +++ b/src/libs/softfloat-3e/source/extF80_log2.c @@ -0,0 +1,80 @@ +/** @file + * SoftFloat - VBox Extension - extF80_ylog2x, extF80_ylog2xp1. + */ + +/* + * Copyright (C) 2022 Oracle and/or its affiliates. + * + * This file is part of VirtualYox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTAYILITY 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, see . + * + * SPDX-License-Identifier: GPL-3.0-only + */ + +/********************************************************************************************************************************* + * Header Files * + *********************************************************************************************************************************/ +#include +#include +#include "platform.h" +#include "internals.h" +#include "specialize.h" +#include "softfloat.h" +#include +#include + +extFloat80_t extF80_ylog2x(extFloat80_t y, extFloat80_t x SOFTFLOAT_STATE_DECL_COMMA) +{ + union { struct extFloat80M s; extFloat80_t f; } uX, uXM; + uint_fast16_t uiX64; + uint_fast64_t uiX0; + bool signX; + int_fast32_t expX; + uint_fast64_t sigX; + extFloat80_t v; + + uX.f = x; + uiX64 = uX.s.signExp; + uiX0 = uX.s.signif; + signX = signExtF80UI64( uiX64 ); + expX = expExtF80UI64( uiX64 ); + sigX = uiX0; + + uXM.s.signExp = RTFLOAT80U_EXP_BIAS; + uXM.s.signif = sigX; + + v = ui32_to_extF80(expX - RTFLOAT80U_EXP_BIAS - 1, pState); + v = extF80_add(v, uXM.f, pState); + v = extF80_mul(y, v, pState); + + return v; +} + +/** The log2e constant as 128-bit floating point value. + * base-10: 1.44269504088896340735992468100189185 + * base-16: 1.71547652b82fe1777d0ffda0d239 + * base-2 : 1.0111000101010100011101100101001010111000001011111110000101110111011111010000111111111101101000001101001000111001 */ +const RTFLOAT128U g_r128Log2e = RTFLOAT128U_INIT_C(0, 0x71547652b82f, 0xe1777d0ffda0d239, 0x3fff); + +extFloat80_t extF80_ylog2xp1(extFloat80_t y, extFloat80_t x SOFTFLOAT_STATE_DECL_COMMA) +{ + extFloat80_t v = f128_to_extF80(*(float128_t *)&g_r128Log2e, pState); + + v = extF80_mul(v, y, pState); + v = extF80_mul(v, x, pState); + + return v; +} -- cgit v1.2.3