diff options
Diffstat (limited to 'soft-fp/truncdfbf2.c')
-rw-r--r-- | soft-fp/truncdfbf2.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/soft-fp/truncdfbf2.c b/soft-fp/truncdfbf2.c new file mode 100644 index 0000000..3d80a96 --- /dev/null +++ b/soft-fp/truncdfbf2.c @@ -0,0 +1,52 @@ +/* Software floating-point emulation. + Truncate IEEE double into bfloat16. + Copyright (C) 2022-2024 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. + + 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/>. */ + +#include "soft-fp.h" +#include "brain.h" +#include "double.h" + +BFtype +__truncdfbf2 (DFtype a) +{ + FP_DECL_EX; + FP_DECL_D (A); + FP_DECL_B (R); + BFtype r; + + FP_INIT_ROUNDMODE; + FP_UNPACK_SEMIRAW_D (A, a); +#if _FP_W_TYPE_SIZE < _FP_FRACBITS_D + FP_TRUNC (B, D, 1, 2, R, A); +#else + FP_TRUNC (B, D, 1, 1, R, A); +#endif + FP_PACK_SEMIRAW_B (r, R); + FP_HANDLE_EXCEPTIONS; + + return r; +} |