1/* Software floating-point emulation.
2 Compare (*a) and (*b), return float condition code.
3 Signal exception (unless masked) if unordered.
4 Copyright (C) 1997-2024 Free Software Foundation, Inc.
5 This file is part of the GNU C Library.
6
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.
11
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.
16
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/>. */
20
21#include "soft-fp.h"
22#include "quad.h"
23
24int _Qp_cmpe(const long double *a, const long double *b)
25{
26 FP_DECL_EX;
27 FP_DECL_Q(A); FP_DECL_Q(B);
28 int r;
29
30 FP_INIT_ROUNDMODE;
31 FP_UNPACK_RAW_QP(A, a);
32 FP_UNPACK_RAW_QP(B, b);
33 FP_CMP_Q(r, B, A, 3, 2);
34 if (r == -1) r = 2;
35 QP_HANDLE_EXCEPTIONS(
36 __asm (
37" ldd [%0], %%f52\n"
38" ldd [%0+8], %%f54\n"
39" ldd [%1], %%f56\n"
40" ldd [%1+8], %%f58\n"
41" fcmpeq %%fcc3, %%f52, %%f56\n"
42" " : : "r" (a), "r" (b) : QP_CLOBBER_CC);
43 _FPU_GETCW(_fcw);
44 r = ((_fcw >> 36) & 3));
45
46 return r;
47}
48

source code of glibc/sysdeps/sparc/sparc64/qp_cmpe.c