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author | H.J. Lu <hjl.tools@gmail.com> | 2021-07-01 08:35:28 -0700 |
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committer | H.J. Lu <hjl.tools@gmail.com> | 2021-07-01 11:02:58 -0700 |
commit | 8241409e29a347ff6613d28d13cb1c7cdf1ec888 (patch) | |
tree | 9f112dd81013ab2622575c7b33e6576576d76598 /soft-fp/truncxfhf2.c | |
parent | ea8e465a6b8d0f26c72bcbe453a854de3abf68ec (diff) | |
download | glibc-8241409e29a347ff6613d28d13cb1c7cdf1ec888.tar.gz glibc-8241409e29a347ff6613d28d13cb1c7cdf1ec888.tar.xz glibc-8241409e29a347ff6613d28d13cb1c7cdf1ec888.zip |
soft-fp: Add __extendhfxf2 and __truncxfhf2
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: https://software.intel.com/content/www/us/en/develop/download/intel-avx512-fp16-architecture-specification.html support in GCC.
Diffstat (limited to 'soft-fp/truncxfhf2.c')
-rw-r--r-- | soft-fp/truncxfhf2.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/soft-fp/truncxfhf2.c b/soft-fp/truncxfhf2.c new file mode 100644 index 0000000000..688ad24523 --- /dev/null +++ b/soft-fp/truncxfhf2.c @@ -0,0 +1,52 @@ +/* Software floating-point emulation. + Truncate IEEE extended into IEEE half. + 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/>. */ + +#include "soft-fp.h" +#include "half.h" +#include "extended.h" + +HFtype +__truncxfhf2 (XFtype a) +{ + FP_DECL_EX; + FP_DECL_E (A); + FP_DECL_H (R); + HFtype r; + + FP_INIT_ROUNDMODE; + FP_UNPACK_SEMIRAW_E (A, a); +#if _FP_W_TYPE_SIZE < 64 + FP_TRUNC (H, E, 1, 4, R, A); +#else + FP_TRUNC (H, E, 1, 2, R, A); +#endif + FP_PACK_SEMIRAW_H (r, R); + FP_HANDLE_EXCEPTIONS; + + return r; +} |