1 /* Software floating-point emulation.
2 Compare (*a) and (*b), return float condition code.
3 Signal exception (unless masked) if unordered.
4 Copyright (C) 1997-2017 Free Software Foundation, Inc.
5 This file is part of the GNU C Library.
6 Contributed by Richard Henderson (rth@cygnus.com) and
7 Jakub Jelinek (jj@ultra.linux.cz).
8
9 The GNU C Library is free software; you can redistribute it and/or
10 modify it under the terms of the GNU Lesser General Public
11 License as published by the Free Software Foundation; either
12 version 2.1 of the License, or (at your option) any later version.
13
14 The GNU C Library is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Lesser General Public License for more details.
18
19 You should have received a copy of the GNU Lesser General Public
20 License along with the GNU C Library; if not, see
21 <http://www.gnu.org/licenses/>. */
22
23 #include "soft-fp.h"
24 #include "quad.h"
25
_Qp_cmpe(const long double * a,const long double * b)26 int _Qp_cmpe(const long double *a, const long double *b)
27 {
28 FP_DECL_EX;
29 FP_DECL_Q(A); FP_DECL_Q(B);
30 int r;
31
32 FP_INIT_ROUNDMODE;
33 FP_UNPACK_RAW_QP(A, a);
34 FP_UNPACK_RAW_QP(B, b);
35 FP_CMP_Q(r, B, A, 3, 2);
36 if (r == -1) r = 2;
37 QP_HANDLE_EXCEPTIONS(
38 __asm (
39 " ldd [%0], %%f52\n"
40 " ldd [%0+8], %%f54\n"
41 " ldd [%1], %%f56\n"
42 " ldd [%1+8], %%f58\n"
43 " fcmpeq %%fcc3, %%f52, %%f56\n"
44 " " : : "r" (a), "r" (b) : QP_CLOBBER_CC);
45 _FPU_GETCW(_fcw);
46 r = ((_fcw >> 36) & 3));
47
48 return r;
49 }
50