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git.ipfire.org Git - thirdparty/glibc.git/blob - sysdeps/alpha/fpu/s_rintf.c
d252e9e2687b379d32729c18348201ab2010ca16
1 /* Copyright (C) 2000-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Richard Henderson.
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 <libm-alias-float.h>
30 if (isless (fabsf (x
), 16777216.0f
)) /* 1 << FLT_MANT_DIG */
32 /* Note that Alpha S_Floating is stored in registers in a
33 restricted T_Floating format, so we don't even need to
34 convert back to S_Floating in the end. The initial
35 conversion to T_Floating is needed to handle denormals. */
37 float tmp1
, tmp2
, new_x
;
39 __asm ("cvtst/s %3,%2\n\t"
40 "cvttq/svid %2,%1\n\t"
42 : "=f"(new_x
), "=&f"(tmp1
), "=&f"(tmp2
)
45 /* rint(-0.1) == -0, and in general we'll always have the same
47 x
= copysignf(new_x
, x
);
52 libm_alias_float (__rint
, rint
)