diff options
Diffstat (limited to 'src/tools/qfloat16-tables/gen_qfloat16_tables.cpp')
| -rw-r--r-- | src/tools/qfloat16-tables/gen_qfloat16_tables.cpp | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/src/tools/qfloat16-tables/gen_qfloat16_tables.cpp b/src/tools/qfloat16-tables/gen_qfloat16_tables.cpp deleted file mode 100644 index 17fc978039..0000000000 --- a/src/tools/qfloat16-tables/gen_qfloat16_tables.cpp +++ /dev/null @@ -1,163 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 by Southwest Research Institute (R) -** Contact: http://www.qt-project.org/legal -** -** This file is part of the QtCore module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include <qfile.h> -#include <qdebug.h> - -quint32 convertmantissa(qint32 i) -{ - quint32 m = i << 13; // Zero pad mantissa bits - quint32 e = 0; // Zero exponent - - while (!(m & 0x00800000)) { // While not normalized - e -= 0x00800000; // Decrement exponent (1<<23) - m <<= 1; // Shift mantissa - } - m &= ~0x00800000; // Clear leading 1 bit - e += 0x38800000; // Adjust bias ((127-14)<<23) - return m | e; // Return combined number -} - -// we first build these tables up and then print them out as a separate step in order -// to more closely map the implementation given in the paper. -quint32 basetable[512]; -quint32 shifttable[512]; - -#define PRINTHEX(a) "0x" + QByteArray::number(a,16).toUpper() + "U,\n" - -qint32 main(qint32 argc, char **argv) -{ - if (argc < 2) { - qWarning() << "Must provide output filename as argument."; - return -1; - } - - QFile fid(QFile::decodeName(argv[1])); - if (!fid.open(QIODevice::WriteOnly | QIODevice::Text)) { - qWarning() << "Abort: Failed to open/create file" << fid.fileName(); - return -1; - } - quint32 i; - - fid.write("/* This file was generated by gen_qfloat16_tables.cpp */\n\n"); - fid.write("#include <QtCore/qfloat16.h>\n\n"); - - fid.write("QT_BEGIN_NAMESPACE\n\n"); - fid.write("#if !defined(__F16C__) && !defined(__ARM_FP16_FORMAT_IEEE)\n\n"); - - fid.write("const quint32 qfloat16::mantissatable[2048] = {\n"); - fid.write("0,\n"); - for (i = 1; i < 1024; i++) - fid.write(PRINTHEX(convertmantissa(i))); - for (i = 1024; i < 2048; i++) - fid.write(PRINTHEX(0x38000000U + ((i - 1024) << 13))); - fid.write("};\n\n"); - - fid.write("const quint32 qfloat16::exponenttable[64] = {\n"); - fid.write("0,\n"); - for (i = 1; i < 31; i++) - fid.write(PRINTHEX(i << 23)); - fid.write("0x47800000U,\n"); // 31 - fid.write("0x80000000U,\n"); // 32 - for (i = 33; i < 63; i++) - fid.write(PRINTHEX(0x80000000U + ((i - 32) << 23))); - fid.write("0xC7800000U,\n"); // 63 - fid.write("};\n\n"); - - fid.write("const quint32 qfloat16::offsettable[64] = {\n"); - fid.write("0,\n"); - for (i = 1; i < 32; i++) - fid.write("1024U,\n"); - fid.write("0,\n"); - for (i = 33; i < 64; i++) - fid.write("1024U,\n"); - fid.write("};\n\n"); - - qint32 e; - for (i = 0; i < 256; ++i) { - e = i - 127; - if (e < -24) { // Very small numbers map to zero - basetable[i | 0x000] = 0x0000; - basetable[i | 0x100] = 0x8000; - shifttable[i | 0x000] = 24; - shifttable[i | 0x100] = 24; - - } else if (e < -14) { // Small numbers map to denorms - basetable[i | 0x000] = (0x0400 >> (-e - 14)); - basetable[i | 0x100] = (0x0400 >> (-e - 14)) | 0x8000; - shifttable[i | 0x000] = -e - 1; - shifttable[i | 0x100] = -e - 1; - - } else if (e <= 15) { // Normal numbers just lose precision - basetable[i | 0x000] = ((e + 15) << 10); - basetable[i | 0x100] = ((e + 15) << 10) | 0x8000; - shifttable[i | 0x000] = 13; - shifttable[i | 0x100] = 13; - - } else if (e < 128) { // Large numbers map to Infinity - basetable[i | 0x000] = 0x7C00; - basetable[i | 0x100] = 0xFC00; - shifttable[i | 0x000] = 24; - shifttable[i | 0x100] = 24; - - } else { // Infinity and NaN's stay Infinity and NaN's - basetable[i | 0x000] = 0x7C00; - basetable[i | 0x100] = 0xFC00; - shifttable[i | 0x000] = 13; - shifttable[i | 0x100] = 13; - } - } - - fid.write("const quint32 qfloat16::basetable[512] = {\n"); - for (i = 0; i < 512; i++) - fid.write(PRINTHEX(basetable[i])); - - fid.write("};\n\n"); - - fid.write("const quint32 qfloat16::shifttable[512] = {\n"); - for (i = 0; i < 512; i++) - fid.write(PRINTHEX(shifttable[i])); - - fid.write("};\n\n"); - - fid.write("#endif // !__F16C__ && !__ARM_FP16_FORMAT_IEEE\n\n"); - fid.write("QT_END_NAMESPACE\n"); - fid.close(); - return 0; -} |