diff options
author | Kito Cheng <kito.cheng@sifive.com> | 2020-11-18 06:35:43 +0300 |
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committer | Corinna Vinschen <corinna@vinschen.de> | 2020-11-18 11:35:28 +0300 |
commit | 57635f85819469d056057748574b10c217a11788 (patch) | |
tree | 8cf87b335d1d03c08a607859d18cdef1600f239d /newlib/libm/machine/riscv/s_lround.c | |
parent | 5cf5a2e4c0c736d367afcae60c82203e94280900 (diff) |
RISC-V: Add machine-specific implementation for lrint[f], lround[f], llrint[f] and llround[f].
Diffstat (limited to 'newlib/libm/machine/riscv/s_lround.c')
-rw-r--r-- | newlib/libm/machine/riscv/s_lround.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/newlib/libm/machine/riscv/s_lround.c b/newlib/libm/machine/riscv/s_lround.c new file mode 100644 index 000000000..5be778834 --- /dev/null +++ b/newlib/libm/machine/riscv/s_lround.c @@ -0,0 +1,56 @@ +/* + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 2020 Kito Cheng + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * 3. Neither the name of the copyright holder nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <math.h> + +#if defined(__riscv_flen) && __riscv_flen >= 64 +long int +lround (double x) +{ + long result; + asm ( +#if __riscv_xlen == 32 + "fcvt.w.d" +#elif __riscv_xlen == 64 + "fcvt.l.d" +#else +#error Unsupported XLEN +#endif + "\t%0, %1, rmm" : "=r"(result) : "f"(x)); + return result; +} +#else +#include "../../common/s_lround.c" +#endif |