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author | Kito Cheng <kito.cheng@sifive.com> | 2022-07-05 17:46:31 +0800 |
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committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-08-08 11:28:40 -0300 |
commit | 8bc3f94a062776abfaf14201fba37bea5328bf92 (patch) | |
tree | 5c20abdf448e6e4c98d86d4d09b9a3cefbe85ee7 /soft-fp/floatdihf.c | |
parent | 26a3499cdbc537de1b6305ed5e6bcff02734f51e (diff) | |
download | glibc-8bc3f94a062776abfaf14201fba37bea5328bf92.tar.gz glibc-8bc3f94a062776abfaf14201fba37bea5328bf92.tar.xz glibc-8bc3f94a062776abfaf14201fba37bea5328bf92.zip |
soft-fp: Add fixhf[uns][di|si] and float[uns][di|si]hf
Add more IEEE half conversion routines: - Convert 32-bit/64-bit integer to IEEE half. - Convert IEEE half to 32-bit/64-bit integer. They are required by RISC-V _Float16 support, tested with RISC-V GCC.
Diffstat (limited to 'soft-fp/floatdihf.c')
-rw-r--r-- | soft-fp/floatdihf.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/soft-fp/floatdihf.c b/soft-fp/floatdihf.c new file mode 100644 index 0000000000..284a516cb9 --- /dev/null +++ b/soft-fp/floatdihf.c @@ -0,0 +1,45 @@ +/* Software floating-point emulation. + Convert a 64bit signed integer to IEEE half + Copyright (C) 2022 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" + +HFtype +__floatdihf (DItype i) +{ + FP_DECL_EX; + FP_DECL_H (A); + HFtype a; + + FP_INIT_ROUNDMODE; + FP_FROM_INT_H (A, i, DI_BITS, UDItype); + FP_PACK_RAW_H (a, A); + FP_HANDLE_EXCEPTIONS; + + return a; +} |