diff options
author | Keith Packard via Newlib <newlib@sourceware.org> | 2020-09-03 23:54:32 +0300 |
---|---|---|
committer | Corinna Vinschen <corinna@vinschen.de> | 2020-09-04 16:11:31 +0300 |
commit | 373f628d043cbfb138c0f53c73cafb831bac621c (patch) | |
tree | af5ebbde34f72fe4e165f5f27263bfa1d9bc20e8 /newlib/libm/machine/riscv/ef_sqrt.c | |
parent | cae21d17ade360b9eb490f2f637bf8a583380364 (diff) |
libm/riscv: Fix machine-specific sqrt build process
Like ARM, some RISC-V implementations have hardware sqrt. Support for
that can be detected at compile time, which the code did. However, the
filenames were incorrect so that both the risc-v specific and general
code were getting included in the resulting library.
Fix this by following the ARM model and #include'ing the general code
when the architecture-specific support is not available.
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'newlib/libm/machine/riscv/ef_sqrt.c')
-rw-r--r-- | newlib/libm/machine/riscv/ef_sqrt.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/newlib/libm/machine/riscv/ef_sqrt.c b/newlib/libm/machine/riscv/ef_sqrt.c new file mode 100644 index 000000000..1f378f547 --- /dev/null +++ b/newlib/libm/machine/riscv/ef_sqrt.c @@ -0,0 +1,51 @@ +/* + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright © 2020 Keith Packard + * + * 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> +#include "math_config.h" + +#if defined(__riscv_fsqrt) && __riscv_flen >= 32 + +float +__ieee754_sqrtf (float x) +{ + float result; + asm ("fsqrt.s %0, %1" : "=f" (result) : "f" (x)); + return result; +} + +#else +#include "../../math/ef_sqrt.c" +#endif |