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/*
Copyright (C) 2020-2023 Sutou Kouhei <kou@clear-code.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "grn.h"
#include "grn_float.h"
#include <math.h>
#include <float.h>
#ifdef GRN_HAVE_BFLOAT16
float
grn_bfloat16_to_float32(grn_bfloat16 value)
{
float value_float = 0;
memcpy(((char *)(&value_float)) + sizeof(float) - sizeof(grn_bfloat16), &value, sizeof(grn_bfloat16));
return value_float;
}
grn_bfloat16
grn_float32_to_bfloat16(float value)
{
grn_bfloat16 value_bfloat16 = 0;
memcpy(&value_bfloat16,
((char *)&value) + sizeof(float) - sizeof(grn_bfloat16),
sizeof(grn_bfloat16));
return value_bfloat16;
}
bool
grn_bfloat16_is_zero(grn_bfloat16 value)
{
return grn_float32_is_zero(grn_bfloat16_to_float32(value));
}
#endif
bool
grn_float32_is_zero(float value)
{
return fabsf(value) < FLT_EPSILON;
}
bool
grn_float_is_zero(double value)
{
return fabs(value) < DBL_EPSILON;
}
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