1a4b2224b8
This patch is updating soft-fp from glibc: 1. Add __extendhfxf2 to return an IEEE half converted to IEEE extended. 2. Add __truncxfhf2 to truncate IEEE extended into IEEE half. These are needed by x86 _Float16 support. * soft-fp/extendhfxf2.c: New file. * soft-fp/truncxfhf2.c: Likewise.
54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
/* Software floating-point emulation.
|
|
Return an IEEE half converted to IEEE extended.
|
|
Copyright (C) 2021 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.
|
|
|
|
In addition to the permissions in the GNU Lesser General Public
|
|
License, the Free Software Foundation gives you unlimited
|
|
permission to link the compiled version of this file into
|
|
combinations with other programs, and to distribute those
|
|
combinations without any restriction coming from the use of this
|
|
file. (The Lesser General Public License restrictions do apply in
|
|
other respects; for example, they cover modification of the file,
|
|
and distribution when not linked into a combine executable.)
|
|
|
|
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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#define FP_NO_EXACT_UNDERFLOW
|
|
#include "soft-fp.h"
|
|
#include "half.h"
|
|
#include "extended.h"
|
|
|
|
XFtype
|
|
__extendhfxf2 (HFtype a)
|
|
{
|
|
FP_DECL_EX;
|
|
FP_DECL_H (A);
|
|
FP_DECL_E (R);
|
|
XFtype r;
|
|
|
|
FP_INIT_EXCEPTIONS;
|
|
FP_UNPACK_RAW_H (A, a);
|
|
#if _FP_W_TYPE_SIZE < 64
|
|
FP_EXTEND (E, H, 4, 1, R, A);
|
|
#else
|
|
FP_EXTEND (E, H, 2, 1, R, A);
|
|
#endif
|
|
FP_PACK_RAW_E (r, R);
|
|
FP_HANDLE_EXCEPTIONS;
|
|
|
|
return r;
|
|
}
|