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/* Software floating-point emulation.
Compare (*a) and (*b), return float condition code.
Copyright (C) 1997-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Richard Henderson (rth@cygnus.com) and
Jakub Jelinek (jj@ultra.linux.cz).
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include "soft-fp.h"
#include "quad.h"
int _Qp_cmp(const long double *a, const long double *b)
{
FP_DECL_EX;
FP_DECL_Q(A); FP_DECL_Q(B);
int r;
FP_INIT_ROUNDMODE;
FP_UNPACK_RAW_QP(A, a);
FP_UNPACK_RAW_QP(B, b);
FP_CMP_Q(r, B, A, 3);
if (r == -1) r = 2;
if (r == 3 && (FP_ISSIGNAN_Q(A) || FP_ISSIGNAN_Q(B)))
FP_SET_EXCEPTION(FP_EX_INVALID);
QP_HANDLE_EXCEPTIONS(
__asm (
" ldd [%0], %%f52\n"
" ldd [%0+8], %%f54\n"
" ldd [%1], %%f56\n"
" ldd [%1+8], %%f58\n"
" fcmpq %%fcc3, %%f52, %%f56\n"
" " : : "r" (a), "r" (b) : QP_CLOBBER_CC);
_FPU_GETCW(_fcw);
r = ((_fcw >> 36) & 3));
return r;
}
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