1 /* roundf(). RISC-V version.
2 Copyright (C) 2017-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library. If not, see
17 <https://www.gnu.org/licenses/>. */
19 #define NO_MATH_REDIRECT
21 #include <fenv_private.h>
22 #include <libm-alias-float.h>
28 int flags
= riscv_getflags ();
30 float mag
= fabsf (x
);
35 if (mag
< (1 << __FLT_MANT_DIG__
))
40 asm volatile ("fcvt.w.s %0, %1, rmm" : "=r" (i
) : "f" (x
));
41 asm volatile ("fcvt.s.w %0, %1, rmm" : "=f" (new_x
) : "r" (i
));
43 /* round(-0) == -0, and in general we'll always have the same
45 x
= copysignf (new_x
, x
);
47 riscv_setflags (flags
);
53 libm_alias_float (__round
, round
)