mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-29 08:11:08 +00:00
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/* Subtract double values, narrowing the result to float, using soft-fp.
|
|
Copyright (C) 2018-2024 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C 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.
|
|
|
|
The GNU C 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 the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#define f32subf64 __hide_f32subf64
|
|
#define f32subf32x __hide_f32subf32x
|
|
#define fsubl __hide_fsubl
|
|
#include <math.h>
|
|
#undef f32subf64
|
|
#undef f32subf32x
|
|
#undef fsubl
|
|
|
|
#include <math-narrow.h>
|
|
#include <soft-fp.h>
|
|
#include <single.h>
|
|
#include <double.h>
|
|
|
|
float
|
|
__fsub (double x, double y)
|
|
{
|
|
FP_DECL_EX;
|
|
FP_DECL_D (X);
|
|
FP_DECL_D (Y);
|
|
FP_DECL_D (R);
|
|
FP_DECL_S (RN);
|
|
float ret;
|
|
|
|
FP_INIT_ROUNDMODE;
|
|
FP_UNPACK_SEMIRAW_D (X, x);
|
|
FP_UNPACK_SEMIRAW_D (Y, y);
|
|
FP_SUB_D (R, X, Y);
|
|
#if _FP_W_TYPE_SIZE < _FP_FRACBITS_D
|
|
FP_TRUNC (S, D, 1, 2, RN, R);
|
|
#else
|
|
FP_TRUNC (S, D, 1, 1, RN, R);
|
|
#endif
|
|
FP_PACK_SEMIRAW_S (ret, RN);
|
|
FP_HANDLE_EXCEPTIONS;
|
|
CHECK_NARROW_SUB (ret, x, y);
|
|
return ret;
|
|
}
|
|
libm_alias_float_double (sub)
|