mirror of
git://gcc.gnu.org/git/gcc.git
synced 2025-02-20 04:10:09 +08:00
f172b9d38d
The following patch adds the missing
{unsigned ,}__int128 <-> _Decimal{32,64,128}
conversion support into libgcc.a on top of the _BitInt support
(doing it without that would be larger amount of code and I hope all
the targets which support __int128 will eventually support _BitInt,
after all it is a required part of C23) and because it is in libgcc.a
only, it doesn't hurt that much if it is added for some architectures
only in GCC 15.
Initially I thought about doing this on the compiler side, but doing
it on the library side seems to be easier and more -Os friendly.
The tests currently require bitint effective target, that can be
removed when all the int128 targets support bitint.
2023-11-09 Jakub Jelinek <jakub@redhat.com>
PR libgcc/65833
libgcc/
* config/t-softfp (softfp_bid_list): Add
{U,}TItype <-> _Decimal{32,64,128} conversions.
* soft-fp/floattisd.c: New file.
* soft-fp/floattidd.c: New file.
* soft-fp/floattitd.c: New file.
* soft-fp/floatuntisd.c: New file.
* soft-fp/floatuntidd.c: New file.
* soft-fp/floatuntitd.c: New file.
* soft-fp/fixsdti.c: New file.
* soft-fp/fixddti.c: New file.
* soft-fp/fixtdti.c: New file.
* soft-fp/fixunssdti.c: New file.
* soft-fp/fixunsddti.c: New file.
* soft-fp/fixunstdti.c: New file.
gcc/testsuite/
* gcc.dg/dfp/int128-1.c: New test.
* gcc.dg/dfp/int128-2.c: New test.
* gcc.dg/dfp/int128-3.c: New test.
* gcc.dg/dfp/int128-4.c: New test.
54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
/* Software floating-point emulation.
|
|
Convert _Decimal32 to 128bit unsigned integer.
|
|
|
|
Copyright (C) 2023 Free Software Foundation, Inc.
|
|
|
|
This file is part of GCC.
|
|
|
|
GCC is free software; you can redistribute it and/or modify it under
|
|
the terms of the GNU General Public License as published by the Free
|
|
Software Foundation; either version 3, or (at your option) any later
|
|
version.
|
|
|
|
GCC 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 General Public License
|
|
for more details.
|
|
|
|
Under Section 7 of GPL version 3, you are granted additional
|
|
permissions described in the GCC Runtime Library Exception, version
|
|
3.1, as published by the Free Software Foundation.
|
|
|
|
You should have received a copy of the GNU General Public License and
|
|
a copy of the GCC Runtime Library Exception along with this program;
|
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include "soft-fp.h"
|
|
#include "bitint.h"
|
|
|
|
#if defined(__BITINT_MAXWIDTH__) && defined(__SIZEOF_INT128__)
|
|
extern void __bid_fixsdbitint (UBILtype *, SItype, _Decimal32);
|
|
extern UTItype __bid_fixunssdti (_Decimal32);
|
|
|
|
UTItype
|
|
__bid_fixunssdti (_Decimal32 a)
|
|
{
|
|
UBILtype rb[128 / BIL_TYPE_SIZE];
|
|
__bid_fixsdbitint (rb, 128, a);
|
|
#if BIL_TYPE_SIZE == 128
|
|
return rb[0];
|
|
#elif BIL_TYPE_SIZE == 64
|
|
return ((((UTItype) rb[BITINT_END (0, 1)]) << 64)
|
|
| rb[BITINT_END (1, 0)]);
|
|
#elif BIL_TYPE_SIZE == 32
|
|
return ((((UTItype) rb[BITINT_END (0, 3)]) << 96)
|
|
| (((UTItype) rb[BITINT_END (1, 2)]) << 64)
|
|
| (((UTItype) rb[BITINT_END (2, 1)]) << 32)
|
|
| rb[BITINT_END (3, 0)]);
|
|
#else
|
|
#error Unsupported UBILtype
|
|
#endif
|
|
}
|
|
#endif
|