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306c7b1ac3
This patch updates the IEEE 128-bit types used in libgcc. At the moment, we cannot build GCC when the target uses IEEE 128-bit long doubles, such as building the compiler for a native Fedora 36 system. The build dies when it is trying to build the _mulkc3.c and _divkc3 modules. This patch changes libgcc to use long double for the IEEE 128-bit base type if long double is IEEE 128-bit, and it uses _Float128 otherwise. The built-in functions are adjusted to be the correct version based on the IEEE 128-bit base type used. While it is desirable to ultimately have __float128 and _Float128 use the same internal type and mode within GCC, at present if you use the option -mabi=ieeelongdouble, the __float128 type will use the long double type and not the _Float128 type. We get an internal compiler error if we combine the signbitf128 built-in with a long double type. I've gone through several iterations of trying to fix this within GCC, and there are various problems that have come up. I developed this alternative patch that changes libgcc so that it does not tickle the issue. I hope we can fix the compiler at some point, but right now, this is preventing people on Fedora 36 systems from building compilers where the default long double is IEEE 128-bit. 2023-03-06 Michael Meissner <meissner@linux.ibm.com> libgcc/ PR target/107299 * config/rs6000/_divkc3.c (COPYSIGN): Use the correct built-in based on whether long double is IBM or IEEE. (INFINITY): Likewise. (FABS): Likewise. * config/rs6000/_mulkc3.c (COPYSIGN): Likewise. (INFINITY): Likewise. * config/rs6000/quad-float128.h (TF): Remove definition. (TFtype): Define to be long double or _Float128. (TCtype): Define to be _Complex long double or _Complex _Float128. * libgcc2.h (TFtype): Allow machine config files to override this. (TCtype): Likewise. * soft-fp/quad.h (TFtype): Likewise.
544 lines
16 KiB
C
544 lines
16 KiB
C
/* Header file for libgcc2.c. */
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/* Copyright (C) 2000-2023 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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#ifndef GCC_LIBGCC2_H
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#define GCC_LIBGCC2_H
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#ifndef HIDE_EXPORTS
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#pragma GCC visibility push(default)
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#endif
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extern int __gcc_bcmp (const unsigned char *, const unsigned char *, size_t);
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extern void __clear_cache (void *, void *);
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extern void __eprintf (const char *, const char *, unsigned int, const char *)
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__attribute__ ((__noreturn__));
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#ifdef __LIBGCC_HAS_HF_MODE__
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#define LIBGCC2_HAS_HF_MODE 1
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#else
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#define LIBGCC2_HAS_HF_MODE 0
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#endif
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#ifdef __LIBGCC_HAS_SF_MODE__
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#define LIBGCC2_HAS_SF_MODE 1
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#else
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#define LIBGCC2_HAS_SF_MODE 0
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#endif
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#ifdef __LIBGCC_HAS_DF_MODE__
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#define LIBGCC2_HAS_DF_MODE 1
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#else
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#define LIBGCC2_HAS_DF_MODE 0
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#endif
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#ifdef __LIBGCC_HAS_XF_MODE__
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#define LIBGCC2_HAS_XF_MODE 1
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#else
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#define LIBGCC2_HAS_XF_MODE 0
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#endif
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#ifdef __LIBGCC_HAS_TF_MODE__
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#define LIBGCC2_HAS_TF_MODE 1
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#else
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#define LIBGCC2_HAS_TF_MODE 0
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#endif
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#ifndef __LIBGCC_SF_MANT_DIG__
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#if LIBGCC2_HAS_SF_MODE
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#error __LIBGCC_SF_MANT_DIG__ not defined
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#else
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#define __LIBGCC_SF_MANT_DIG__ 0
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#endif
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#endif
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#ifndef __LIBGCC_DF_MANT_DIG__
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#if LIBGCC2_HAS_DF_MODE
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#error __LIBGCC_DF_MANT_DIG__ not defined
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#else
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#define __LIBGCC_DF_MANT_DIG__ 0
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#endif
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#endif
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#ifndef __LIBGCC_XF_MANT_DIG__
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#if LIBGCC2_HAS_XF_MODE
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#error __LIBGCC_XF_MANT_DIG__ not defined
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#else
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#define __LIBGCC_XF_MANT_DIG__ 0
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#endif
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#endif
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#ifndef __LIBGCC_TF_MANT_DIG__
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#if LIBGCC2_HAS_TF_MODE
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#error __LIBGCC_TF_MANT_DIG__ not defined
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#else
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#define __LIBGCC_TF_MANT_DIG__ 0
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#endif
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#endif
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/* FIXME: This #ifdef probably should be removed, ie. enable the test
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for mips too. */
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/* Don't use IBM Extended Double TFmode for TI->SF calculations.
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The conversion from long double to float suffers from double
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rounding, because we convert via double. In other cases, going
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through the software fp routines is much slower than the fallback. */
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#ifdef __powerpc__
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#define AVOID_FP_TYPE_CONVERSION(SIZE) (SIZE == 106)
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#elif defined(WIDEST_HARDWARE_FP_SIZE)
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#define AVOID_FP_TYPE_CONVERSION(SIZE) (SIZE > WIDEST_HARDWARE_FP_SIZE)
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#else
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#define AVOID_FP_TYPE_CONVERSION(SIZE) 0
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#endif
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/* In the first part of this file, we are interfacing to calls generated
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by the compiler itself. These calls pass values into these routines
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which have very specific modes (rather than very specific types), and
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these compiler-generated calls also expect any return values to have
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very specific modes (rather than very specific types). Thus, we need
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to avoid using regular C language type names in this part of the file
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because the sizes for those types can be configured to be anything.
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Instead we use the following special type names. */
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typedef int QItype __attribute__ ((mode (QI)));
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typedef unsigned int UQItype __attribute__ ((mode (QI)));
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typedef int HItype __attribute__ ((mode (HI)));
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typedef unsigned int UHItype __attribute__ ((mode (HI)));
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#if MIN_UNITS_PER_WORD > 1
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/* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1. */
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typedef int SItype __attribute__ ((mode (SI)));
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typedef unsigned int USItype __attribute__ ((mode (SI)));
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#if __SIZEOF_LONG_LONG__ > 4
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/* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2. */
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typedef int DItype __attribute__ ((mode (DI)));
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typedef unsigned int UDItype __attribute__ ((mode (DI)));
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#if MIN_UNITS_PER_WORD > 4
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/* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4. */
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typedef int TItype __attribute__ ((mode (TI)));
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typedef unsigned int UTItype __attribute__ ((mode (TI)));
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#endif
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#endif
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#endif
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#if LIBGCC2_HAS_HF_MODE
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typedef float HFtype __attribute__ ((mode (HF)));
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typedef _Complex float HCtype __attribute__ ((mode (HC)));
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#endif
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#if LIBGCC2_HAS_SF_MODE
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typedef float SFtype __attribute__ ((mode (SF)));
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typedef _Complex float SCtype __attribute__ ((mode (SC)));
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#endif
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#if LIBGCC2_HAS_DF_MODE
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typedef float DFtype __attribute__ ((mode (DF)));
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typedef _Complex float DCtype __attribute__ ((mode (DC)));
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#endif
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#if LIBGCC2_HAS_XF_MODE
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typedef float XFtype __attribute__ ((mode (XF)));
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typedef _Complex float XCtype __attribute__ ((mode (XC)));
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#endif
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#if LIBGCC2_HAS_TF_MODE
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#ifndef TFtype
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typedef float TFtype __attribute__ ((mode (TF)));
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#endif
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#ifndef TCtype
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typedef _Complex float TCtype __attribute__ ((mode (TC)));
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#endif
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#endif
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typedef int cmp_return_type __attribute__((mode (__libgcc_cmp_return__)));
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typedef int shift_count_type __attribute__((mode (__libgcc_shift_count__)));
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/* Make sure that we don't accidentally use any normal C language built-in
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type names in the first part of this file. Instead we want to use *only*
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the type names defined above. The following macro definitions insure
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that if we *do* accidentally use some normal C language built-in type name,
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we will get a syntax error. */
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#define char bogus_type
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#define short bogus_type
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#define int bogus_type
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#define long bogus_type
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#define unsigned bogus_type
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#define float bogus_type
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#define double bogus_type
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/* Versions prior to 3.4.4 were not taking into account the word size for
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the 5 trapping arithmetic functions absv, addv, subv, mulv and negv. As
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a consequence, the si and di variants were always and the only ones emitted.
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To maintain backward compatibility, COMPAT_SIMODE_TRAPPING_ARITHMETIC is
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defined on platforms where it makes sense to still have the si variants
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emitted. As a bonus, their implementation is now correct. Note that the
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same mechanism should have been implemented for the di variants, but it
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turns out that no platform would define COMPAT_DIMODE_TRAPPING_ARITHMETIC
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if it existed. */
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#if LIBGCC2_UNITS_PER_WORD == 8
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#define W_TYPE_SIZE (8 * __CHAR_BIT__)
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#define Wtype DItype
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#define UWtype UDItype
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#define HWtype DItype
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#define UHWtype UDItype
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#define DWtype TItype
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#define UDWtype UTItype
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#ifdef LIBGCC2_GNU_PREFIX
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#define __NW(a,b) __gnu_ ## a ## di ## b
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#define __NDW(a,b) __gnu_ ## a ## ti ## b
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#else
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#define __NW(a,b) __ ## a ## di ## b
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#define __NDW(a,b) __ ## a ## ti ## b
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#endif
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#define COMPAT_SIMODE_TRAPPING_ARITHMETIC
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#elif LIBGCC2_UNITS_PER_WORD == 4
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#define W_TYPE_SIZE (4 * __CHAR_BIT__)
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#define Wtype SItype
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#define UWtype USItype
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#define HWtype SItype
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#define UHWtype USItype
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#define DWtype DItype
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#define UDWtype UDItype
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#ifdef LIBGCC2_GNU_PREFIX
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#define __NW(a,b) __gnu_ ## a ## si ## b
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#define __NDW(a,b) __gnu_ ## a ## di ## b
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#else
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#define __NW(a,b) __ ## a ## si ## b
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#define __NDW(a,b) __ ## a ## di ## b
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#endif
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#elif LIBGCC2_UNITS_PER_WORD == 2
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#define W_TYPE_SIZE (2 * __CHAR_BIT__)
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#define Wtype HItype
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#define UWtype UHItype
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#define HWtype HItype
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#define UHWtype UHItype
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#define DWtype SItype
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#define UDWtype USItype
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#ifdef LIBGCC2_GNU_PREFIX
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#define __NW(a,b) __gnu_ ## a ## hi ## b
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#define __NDW(a,b) __gnu_ ## a ## si ## b
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#else
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#define __NW(a,b) __ ## a ## hi ## b
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#define __NDW(a,b) __ ## a ## si ## b
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#endif
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#else
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#define W_TYPE_SIZE __CHAR_BIT__
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#define Wtype QItype
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#define UWtype UQItype
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#define HWtype QItype
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#define UHWtype UQItype
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#define DWtype HItype
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#define UDWtype UHItype
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#ifdef LIBGCC2_GNU_PREFIX
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#define __NW(a,b) __gnu_ ## a ## qi ## b
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#define __NDW(a,b) __gnu_ ## a ## hi ## b
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#else
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#define __NW(a,b) __ ## a ## qi ## b
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#define __NDW(a,b) __ ## a ## hi ## b
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#endif
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#endif
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#ifdef LIBGCC2_GNU_PREFIX
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#define __N(a) __gnu_ ## a
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#else
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#define __N(a) __ ## a
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#endif
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#define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
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#define Wtype_MIN (- Wtype_MAX - 1)
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#if W_TYPE_SIZE == 8
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# define Wtype_MAXp1_F 0x1p8f
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#elif W_TYPE_SIZE == 16
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# define Wtype_MAXp1_F 0x1p16f
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#elif W_TYPE_SIZE == 32
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# define Wtype_MAXp1_F 0x1p32f
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#elif W_TYPE_SIZE == 64
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# define Wtype_MAXp1_F 0x1p64f
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#else
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# error "expand the table"
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#endif
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#define __muldi3 __NDW(mul,3)
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#define __divdi3 __NDW(div,3)
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#define __udivdi3 __NDW(udiv,3)
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#define __moddi3 __NDW(mod,3)
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#define __umoddi3 __NDW(umod,3)
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#define __negdi2 __NDW(neg,2)
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#define __lshrdi3 __NDW(lshr,3)
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#define __ashldi3 __NDW(ashl,3)
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#define __ashrdi3 __NDW(ashr,3)
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#define __cmpdi2 __NDW(cmp,2)
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#define __ucmpdi2 __NDW(ucmp,2)
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#define __divmoddi4 __NDW(divmod,4)
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#define __udivmoddi4 __NDW(udivmod,4)
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#define __fixunstfDI __NDW(fixunstf,)
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#define __fixtfdi __NDW(fixtf,)
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#define __fixunsxfDI __NDW(fixunsxf,)
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#define __fixxfdi __NDW(fixxf,)
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#define __fixunsdfDI __NDW(fixunsdf,)
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#define __fixdfdi __NDW(fixdf,)
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#define __fixunssfDI __NDW(fixunssf,)
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#define __fixsfdi __NDW(fixsf,)
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#define __floatdixf __NDW(float,xf)
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#define __floatditf __NDW(float,tf)
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#define __floatdidf __NDW(float,df)
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#define __floatdisf __NDW(float,sf)
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#define __floatundixf __NDW(floatun,xf)
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#define __floatunditf __NDW(floatun,tf)
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#define __floatundidf __NDW(floatun,df)
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#define __floatundisf __NDW(floatun,sf)
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#define __fixunsxfSI __NW(fixunsxf,)
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#define __fixunstfSI __NW(fixunstf,)
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#define __fixunsdfSI __NW(fixunsdf,)
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#define __fixunssfSI __NW(fixunssf,)
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#define __absvSI2 __NW(absv,2)
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#define __addvSI3 __NW(addv,3)
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#define __subvSI3 __NW(subv,3)
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#define __mulvSI3 __NW(mulv,3)
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#define __negvSI2 __NW(negv,2)
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#define __absvDI2 __NDW(absv,2)
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#define __addvDI3 __NDW(addv,3)
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#define __subvDI3 __NDW(subv,3)
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#define __mulvDI3 __NDW(mulv,3)
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#define __negvDI2 __NDW(negv,2)
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#define __ffsSI2 __NW(ffs,2)
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#define __clzSI2 __NW(clz,2)
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#define __ctzSI2 __NW(ctz,2)
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#define __clrsbSI2 __NW(clrsb,2)
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#define __popcountSI2 __NW(popcount,2)
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#define __paritySI2 __NW(parity,2)
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#define __ffsDI2 __NDW(ffs,2)
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#define __clzDI2 __NDW(clz,2)
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#define __ctzDI2 __NDW(ctz,2)
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#define __clrsbDI2 __NDW(clrsb,2)
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#define __popcountDI2 __NDW(popcount,2)
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#define __parityDI2 __NDW(parity,2)
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#define __clz_tab __N(clz_tab)
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#define __bswapsi2 __N(bswapsi2)
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#define __bswapdi2 __N(bswapdi2)
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#define __udiv_w_sdiv __N(udiv_w_sdiv)
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#define __clear_cache __N(clear_cache)
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#define __enable_execute_stack __N(enable_execute_stack)
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#ifndef __powisf2
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#define __powisf2 __N(powisf2)
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#endif
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#ifndef __powidf2
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#define __powidf2 __N(powidf2)
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#endif
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#ifndef __powitf2
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#define __powitf2 __N(powitf2)
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#endif
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#ifndef __powixf2
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#define __powixf2 __N(powixf2)
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#endif
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#ifndef __mulsc3
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#define __mulsc3 __N(mulsc3)
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#endif
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#ifndef __muldc3
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#define __muldc3 __N(muldc3)
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#endif
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#ifndef __mulxc3
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#define __mulxc3 __N(mulxc3)
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#endif
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#ifndef __multc3
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#define __multc3 __N(multc3)
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#endif
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#ifndef __divsc3
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#define __divsc3 __N(divsc3)
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#endif
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#ifndef __divdc3
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#define __divdc3 __N(divdc3)
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#endif
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#ifndef __divxc3
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#define __divxc3 __N(divxc3)
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#endif
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#ifndef __divtc3
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#define __divtc3 __N(divtc3)
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#endif
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extern DWtype __muldi3 (DWtype, DWtype);
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extern DWtype __divdi3 (DWtype, DWtype);
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extern UDWtype __udivdi3 (UDWtype, UDWtype);
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extern UDWtype __umoddi3 (UDWtype, UDWtype);
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extern DWtype __moddi3 (DWtype, DWtype);
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extern DWtype __divmoddi4 (DWtype, DWtype, DWtype *);
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/* __udivmoddi4 is static inline when building other libgcc2 portions. */
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#if (!defined (L_udivdi3) && !defined (L_divdi3) && \
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!defined (L_umoddi3) && !defined (L_moddi3) && \
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!defined (L_divmoddi4))
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extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
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#endif
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/* __negdi2 is static inline when building other libgcc2 portions. */
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#if !defined(L_divdi3) && !defined(L_moddi3)
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extern DWtype __negdi2 (DWtype);
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#endif
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extern DWtype __lshrdi3 (DWtype, shift_count_type);
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extern DWtype __ashldi3 (DWtype, shift_count_type);
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extern DWtype __ashrdi3 (DWtype, shift_count_type);
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/* __udiv_w_sdiv is static inline when building other libgcc2 portions. */
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#if (!defined(L_udivdi3) && !defined(L_divdi3) && \
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!defined(L_umoddi3) && !defined(L_moddi3))
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extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
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#endif
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extern cmp_return_type __cmpdi2 (DWtype, DWtype);
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extern cmp_return_type __ucmpdi2 (UDWtype, UDWtype);
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#if MIN_UNITS_PER_WORD > 1
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extern SItype __bswapsi2 (SItype);
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#endif
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#if __SIZEOF_LONG_LONG__ > 4
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extern DItype __bswapdi2 (DItype);
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#endif
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extern Wtype __absvSI2 (Wtype);
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extern Wtype __addvSI3 (Wtype, Wtype);
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extern Wtype __subvSI3 (Wtype, Wtype);
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extern Wtype __mulvSI3 (Wtype, Wtype);
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extern Wtype __negvSI2 (Wtype);
|
|
extern DWtype __absvDI2 (DWtype);
|
|
extern DWtype __addvDI3 (DWtype, DWtype);
|
|
extern DWtype __subvDI3 (DWtype, DWtype);
|
|
extern DWtype __mulvDI3 (DWtype, DWtype);
|
|
extern DWtype __negvDI2 (DWtype);
|
|
|
|
#ifdef COMPAT_SIMODE_TRAPPING_ARITHMETIC
|
|
#define __absvsi2 __N(absvsi2)
|
|
#define __negvsi2 __N(negvsi2)
|
|
#define __addvsi3 __N(addvsi3)
|
|
#define __subvsi3 __N(subvsi3)
|
|
#define __mulvsi3 __N(mulvsi3)
|
|
|
|
extern SItype __absvsi2 (SItype);
|
|
extern SItype __addvsi3 (SItype, SItype);
|
|
extern SItype __subvsi3 (SItype, SItype);
|
|
extern SItype __mulvsi3 (SItype, SItype);
|
|
extern SItype __negvsi2 (SItype);
|
|
#endif /* COMPAT_SIMODE_TRAPPING_ARITHMETIC */
|
|
|
|
#undef int
|
|
#if LIBGCC2_HAS_HF_MODE
|
|
extern HCtype __divhc3 (HFtype, HFtype, HFtype, HFtype);
|
|
extern HCtype __mulhc3 (HFtype, HFtype, HFtype, HFtype);
|
|
#endif
|
|
#if LIBGCC2_HAS_SF_MODE
|
|
extern DWtype __fixsfdi (SFtype);
|
|
extern SFtype __floatdisf (DWtype);
|
|
extern SFtype __floatundisf (UDWtype);
|
|
extern UWtype __fixunssfSI (SFtype);
|
|
extern UDWtype __fixunssfDI (SFtype);
|
|
extern SFtype __powisf2 (SFtype, int);
|
|
extern SCtype __divsc3 (SFtype, SFtype, SFtype, SFtype);
|
|
extern SCtype __mulsc3 (SFtype, SFtype, SFtype, SFtype);
|
|
#endif
|
|
#if LIBGCC2_HAS_DF_MODE
|
|
extern DWtype __fixdfdi (DFtype);
|
|
extern DFtype __floatdidf (DWtype);
|
|
extern DFtype __floatundidf (UDWtype);
|
|
extern UWtype __fixunsdfSI (DFtype);
|
|
extern UDWtype __fixunsdfDI (DFtype);
|
|
extern DFtype __powidf2 (DFtype, int);
|
|
extern DCtype __divdc3 (DFtype, DFtype, DFtype, DFtype);
|
|
extern DCtype __muldc3 (DFtype, DFtype, DFtype, DFtype);
|
|
#endif
|
|
|
|
#if LIBGCC2_HAS_XF_MODE
|
|
extern DWtype __fixxfdi (XFtype);
|
|
extern UDWtype __fixunsxfDI (XFtype);
|
|
extern XFtype __floatdixf (DWtype);
|
|
extern XFtype __floatundixf (UDWtype);
|
|
extern UWtype __fixunsxfSI (XFtype);
|
|
extern XFtype __powixf2 (XFtype, int);
|
|
extern XCtype __divxc3 (XFtype, XFtype, XFtype, XFtype);
|
|
extern XCtype __mulxc3 (XFtype, XFtype, XFtype, XFtype);
|
|
#endif
|
|
|
|
#if LIBGCC2_HAS_TF_MODE
|
|
extern UDWtype __fixunstfDI (TFtype);
|
|
extern DWtype __fixtfdi (TFtype);
|
|
extern TFtype __floatditf (DWtype);
|
|
extern TFtype __floatunditf (UDWtype);
|
|
extern TFtype __powitf2 (TFtype, int);
|
|
extern TCtype __divtc3 (TFtype, TFtype, TFtype, TFtype);
|
|
extern TCtype __multc3 (TFtype, TFtype, TFtype, TFtype);
|
|
#endif
|
|
#define int bogus_type
|
|
|
|
/* DWstructs are pairs of Wtype values in the order determined by
|
|
__BYTE_ORDER__. */
|
|
|
|
#if __BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__
|
|
struct DWstruct {Wtype high, low;};
|
|
#else
|
|
struct DWstruct {Wtype low, high;};
|
|
#endif
|
|
|
|
/* We need this union to unpack/pack DImode values, since we don't have
|
|
any arithmetic yet. Incoming DImode parameters are stored into the
|
|
`ll' field, and the unpacked result is read from the struct `s'. */
|
|
|
|
typedef union
|
|
{
|
|
struct DWstruct s;
|
|
DWtype ll;
|
|
} DWunion;
|
|
|
|
/* Defined for L_popcount_tab. Exported here because some targets may
|
|
want to use it for their own versions of the __popcount builtins. */
|
|
extern const UQItype __popcount_tab[256];
|
|
|
|
/* Defined for L_clz. Exported here because some targets may want to use
|
|
it for their own versions of the __clz builtins. It contains the bit
|
|
position of the first set bit for the numbers 0 - 255. This avoids the
|
|
need for a separate table for the __ctz builtins. */
|
|
extern const UQItype __clz_tab[256];
|
|
|
|
#include "longlong.h"
|
|
|
|
#undef int
|
|
extern int __clzDI2 (UDWtype);
|
|
extern int __clzSI2 (UWtype);
|
|
extern int __ctzSI2 (UWtype);
|
|
extern int __ctzDI2 (UDWtype);
|
|
extern int __clrsbSI2 (Wtype);
|
|
extern int __clrsbDI2 (DWtype);
|
|
extern int __ffsSI2 (UWtype);
|
|
extern int __ffsDI2 (DWtype);
|
|
extern int __popcountSI2 (UWtype);
|
|
extern int __popcountDI2 (UDWtype);
|
|
extern int __paritySI2 (UWtype);
|
|
extern int __parityDI2 (UDWtype);
|
|
#define int bogus_type
|
|
|
|
extern void __enable_execute_stack (void *);
|
|
|
|
#ifndef HIDE_EXPORTS
|
|
#pragma GCC visibility pop
|
|
#endif
|
|
|
|
#endif /* ! GCC_LIBGCC2_H */
|