1 /* Round float to int floating-point values without generating
2 an inexact exception, sparc64 version.
4 Copyright (C) 2013-2023 Free Software Foundation, Inc.
5 This file is part of the GNU C Library.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, see
19 <https://www.gnu.org/licenses/>. */
22 #include <libm-alias-float.h>
24 /* We pop constants into the FPU registers using the incoming
25 argument stack slots, since this avoid having to use any PIC
26 references. We also thus avoid having to allocate a register
29 VIS instructions are used to facilitate the formation of
30 easier constants, and the propagation of the sign bit. */
32 #define TWO_TWENTYTHREE 0x4b000000 /* 2**23 */
34 #define ZERO %f10 /* 0.0 */
35 #define SIGN_BIT %f12 /* -0.0 */
38 fcmps %fcc3, %f1, %f1 /* Check for sNaN */
39 stx %fsr, [%sp + STACK_BIAS + 144]
40 sethi %hi(0xf8003e0), %o5
41 sethi %hi(TWO_TWENTYTHREE), %o2
42 ldx [%sp + STACK_BIAS + 144], %o4
43 or %o5, %lo(0xf8003e0), %o5
47 st %o2, [%sp + STACK_BIAS + 128]
48 stx %o4, [%sp + STACK_BIAS + 136]
49 ldx [%sp + STACK_BIAS + 136], %fsr
51 ld [%sp + STACK_BIAS + 128], %f16
52 fcmps %fcc3, %f14, %f16
53 fmovsuge %fcc3, ZERO, %f16
54 fands %f1, SIGN_BIT, SIGN_BIT
55 fors %f16, SIGN_BIT, %f16
59 fors %f0, SIGN_BIT, %f0
61 ldx [%sp + STACK_BIAS + 144], %fsr
63 libm_alias_float (__nearbyint, nearbyint)