54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
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/* Software floating-point emulation.
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Convert _Decimal32 to 128bit unsigned integer.
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Copyright (C) 2023 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "soft-fp.h"
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#include "bitint.h"
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#if defined(__BITINT_MAXWIDTH__) && defined(__SIZEOF_INT128__)
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extern void __bid_fixsdbitint (UBILtype *, SItype, _Decimal32);
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extern UTItype __bid_fixunssdti (_Decimal32);
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UTItype
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__bid_fixunssdti (_Decimal32 a)
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{
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UBILtype rb[128 / BIL_TYPE_SIZE];
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__bid_fixsdbitint (rb, 128, a);
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#if BIL_TYPE_SIZE == 128
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return rb[0];
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#elif BIL_TYPE_SIZE == 64
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return ((((UTItype) rb[BITINT_END (0, 1)]) << 64)
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| rb[BITINT_END (1, 0)]);
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#elif BIL_TYPE_SIZE == 32
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return ((((UTItype) rb[BITINT_END (0, 3)]) << 96)
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| (((UTItype) rb[BITINT_END (1, 2)]) << 64)
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| (((UTItype) rb[BITINT_END (2, 1)]) << 32)
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| rb[BITINT_END (3, 0)]);
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#else
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#error Unsupported UBILtype
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#endif
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}
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#endif
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