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64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
/* Software floating-point emulation: comparison.
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Copyright (C) 1997-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Richard Henderson (rth@cygnus.com) and
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Jakub Jelinek (jj@ultra.linux.cz).
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<https://www.gnu.org/licenses/>. */
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#include "local-soft-fp.h"
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static long
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internal_equality (long al, long ah, long bl, long bh, long neq)
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{
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FP_DECL_EX;
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FP_DECL_Q(A); FP_DECL_Q(B);
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long r;
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AXP_UNPACK_RAW_Q(A, a);
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AXP_UNPACK_RAW_Q(B, b);
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if ((A_e == _FP_EXPMAX_Q && !_FP_FRAC_ZEROP_2(A))
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|| (B_e == _FP_EXPMAX_Q && !_FP_FRAC_ZEROP_2(B)))
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{
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/* EQ and NE signal invalid operation only if either operand is SNaN. */
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if (FP_ISSIGNAN_Q(A) || FP_ISSIGNAN_Q(B))
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{
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FP_SET_EXCEPTION(FP_EX_INVALID);
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FP_HANDLE_EXCEPTIONS;
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}
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return -1;
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}
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r = (A_e == B_e
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&& _FP_FRAC_EQ_2 (A, B)
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&& (A_s == B_s || (!A_e && _FP_FRAC_ZEROP_2(A))));
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r ^= neq;
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return r;
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}
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long
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_OtsEqlX (long al, long ah, long bl, long bh)
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{
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return internal_equality (al, ah, bl, bh, 0);
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}
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long
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_OtsNeqX (long al, long ah, long bl, long bh)
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{
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return internal_equality (al, ah, bl, bh, 1);
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}
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