glibc/sysdeps/unix/sysv/linux/powerpc/htm.h

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/* Shared HTM header. Emulate transactional execution facility intrinsics for
compilers and assemblers that do not support the intrinsics and instructions
yet.
Copyright (C) 2015-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
Prefer https to http for gnu.org and fsf.org URLs Also, change sources.redhat.com to sourceware.org. This patch was automatically generated by running the following shell script, which uses GNU sed, and which avoids modifying files imported from upstream: sed -ri ' s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g ' \ $(find $(git ls-files) -prune -type f \ ! -name '*.po' \ ! -name 'ChangeLog*' \ ! -path COPYING ! -path COPYING.LIB \ ! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \ ! -path manual/texinfo.tex ! -path scripts/config.guess \ ! -path scripts/config.sub ! -path scripts/install-sh \ ! -path scripts/mkinstalldirs ! -path scripts/move-if-change \ ! -path INSTALL ! -path locale/programs/charmap-kw.h \ ! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \ ! '(' -name configure \ -execdir test -f configure.ac -o -f configure.in ';' ')' \ ! '(' -name preconfigure \ -execdir test -f preconfigure.ac ';' ')' \ -print) and then by running 'make dist-prepare' to regenerate files built from the altered files, and then executing the following to cleanup: chmod a+x sysdeps/unix/sysv/linux/riscv/configure # Omit irrelevant whitespace and comment-only changes, # perhaps from a slightly-different Autoconf version. git checkout -f \ sysdeps/csky/configure \ sysdeps/hppa/configure \ sysdeps/riscv/configure \ sysdeps/unix/sysv/linux/csky/configure # Omit changes that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines git checkout -f \ sysdeps/powerpc/powerpc64/ppc-mcount.S \ sysdeps/unix/sysv/linux/s390/s390-64/syscall.S # Omit change that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 05:40:42 +00:00
<https://www.gnu.org/licenses/>. */
#ifndef _HTM_H
#define _HTM_H 1
#ifdef __ASSEMBLER__
/* tbegin. */
.macro TBEGIN
.long 0x7c00051d
.endm
/* tend. 0 */
.macro TEND
.long 0x7c00055d
.endm
/* tabort. code */
.macro TABORT code
.byte 0x7c
.byte \code
.byte 0x07
.byte 0x1d
.endm
/*"TEXASR - Transaction EXception And Summary Register"
mfspr %dst,130 */
.macro TEXASR dst
mfspr \dst,130
.endm
#else
Split up endian.h to minimize exposure of BYTE_ORDER. With only two exceptions (sys/types.h and sys/param.h, both of which historically might have defined BYTE_ORDER) the public headers that include <endian.h> only want to be able to test __BYTE_ORDER against __*_ENDIAN. This patch creates a new bits/endian.h that can be included by any header that wants to be able to test __BYTE_ORDER and/or __FLOAT_WORD_ORDER against the __*_ENDIAN constants, or needs __LONG_LONG_PAIR. It only defines macros in the implementation namespace. The existing bits/endian.h (which could not be included independently of endian.h, and only defines __BYTE_ORDER and maybe __FLOAT_WORD_ORDER) is renamed to bits/endianness.h. I also took the opportunity to canonicalize the form of this header, which we are stuck with having one copy of per architecture. Since they are so short, this means git doesn’t understand that they were renamed from existing headers, sigh. endian.h itself is a nonstandard header and its only remaining use from a standard header is guarded by __USE_MISC, so I dropped the __USE_MISC conditionals from around all of the public-namespace things it defines. (This means, an application that requests strict library conformance but includes endian.h will still see the definition of BYTE_ORDER.) A few changes to specific bits/endian(ness).h variants deserve mention: - sysdeps/unix/sysv/linux/ia64/bits/endian.h is moved to sysdeps/ia64/bits/endianness.h. If I remember correctly, ia64 did have selectable endianness, but we have assembly code in sysdeps/ia64 that assumes it’s little-endian, so there is no reason to treat the ia64 endianness.h as linux-specific. - The C-SKY port does not fully support big-endian mode, the compile will error out if __CSKYBE__ is defined. - The PowerPC port had extra logic in its bits/endian.h to detect a broken compiler, which strikes me as unnecessary, so I removed it. - The only files that defined __FLOAT_WORD_ORDER always defined it to the same value as __BYTE_ORDER, so I removed those definitions. The SH bits/endian(ness).h had comments inconsistent with the actual setting of __FLOAT_WORD_ORDER, which I also removed. - I *removed* copyright boilerplate from the few bits/endian(ness).h headers that had it; these files record a single fact in a fashion dictated by an external spec, so I do not think they are copyrightable. As long as I was changing every copy of ieee754.h in the tree, I noticed that only the MIPS variant includes float.h, because it uses LDBL_MANT_DIG to decide among three different versions of ieee854_long_double. This patch makes it not include float.h when GCC’s intrinsic __LDBL_MANT_DIG__ is available. * string/endian.h: Unconditionally define LITTLE_ENDIAN, BIG_ENDIAN, PDP_ENDIAN, and BYTE_ORDER. Condition byteswapping macros only on !__ASSEMBLER__. Move the definitions of __BIG_ENDIAN, __LITTLE_ENDIAN, __PDP_ENDIAN, __FLOAT_WORD_ORDER, and __LONG_LONG_PAIR to... * string/bits/endian.h: ...this new file, which includes the renamed header bits/endianness.h for the definition of __BYTE_ORDER and possibly __FLOAT_WORD_ORDER. * string/Makefile: Install bits/endianness.h. * include/bits/endian.h: New wrapper. * bits/endian.h: Rename to bits/endianness.h. Add multiple-include guard. Rewrite the comment explaining what the machine-specific variants of this file should do. * sysdeps/unix/sysv/linux/ia64/bits/endian.h: Move to sysdeps/ia64. * sysdeps/aarch64/bits/endian.h * sysdeps/alpha/bits/endian.h * sysdeps/arm/bits/endian.h * sysdeps/csky/bits/endian.h * sysdeps/hppa/bits/endian.h * sysdeps/ia64/bits/endian.h * sysdeps/m68k/bits/endian.h * sysdeps/microblaze/bits/endian.h * sysdeps/mips/bits/endian.h * sysdeps/nios2/bits/endian.h * sysdeps/powerpc/bits/endian.h * sysdeps/riscv/bits/endian.h * sysdeps/s390/bits/endian.h * sysdeps/sh/bits/endian.h * sysdeps/sparc/bits/endian.h * sysdeps/x86/bits/endian.h: Rename to endianness.h; canonicalize form of file; remove redundant definitions of __FLOAT_WORD_ORDER. * sysdeps/powerpc/bits/endianness.h: Remove logic to check for broken compilers. * ctype/ctype.h * sysdeps/aarch64/nptl/bits/pthreadtypes-arch.h * sysdeps/arm/nptl/bits/pthreadtypes-arch.h * sysdeps/csky/nptl/bits/pthreadtypes-arch.h * sysdeps/ia64/ieee754.h * sysdeps/ieee754/ieee754.h * sysdeps/ieee754/ldbl-128/ieee754.h * sysdeps/ieee754/ldbl-128ibm/ieee754.h * sysdeps/m68k/nptl/bits/pthreadtypes-arch.h * sysdeps/microblaze/nptl/bits/pthreadtypes-arch.h * sysdeps/mips/ieee754/ieee754.h * sysdeps/mips/nptl/bits/pthreadtypes-arch.h * sysdeps/nios2/nptl/bits/pthreadtypes-arch.h * sysdeps/nptl/pthread.h * sysdeps/riscv/nptl/bits/pthreadtypes-arch.h * sysdeps/sh/nptl/bits/pthreadtypes-arch.h * sysdeps/sparc/sparc32/ieee754.h * sysdeps/unix/sysv/linux/generic/bits/stat.h * sysdeps/unix/sysv/linux/generic/bits/statfs.h * sysdeps/unix/sysv/linux/sys/acct.h * wctype/bits/wctype-wchar.h: Include bits/endian.h, not endian.h. * sysdeps/unix/sysv/linux/hppa/pthread.h: Don’t include endian.h. * sysdeps/mips/ieee754/ieee754.h: Use __LDBL_MANT_DIG__ in ifdefs, instead of LDBL_MANT_DIG. Only include float.h when __LDBL_MANT_DIG__ is not predefined, in which case define __LDBL_MANT_DIG__ to equal LDBL_MANT_DIG.
2019-09-20 21:23:51 +00:00
#include <bits/endian.h>
/* Official HTM intrinsics interface matching GCC, but works
on older GCC compatible compilers and binutils.
We should somehow detect if the compiler supports it, because
it may be able to generate slightly better code. */
#define TBEGIN ".long 0x7c00051d"
#define TEND ".long 0x7c00055d"
#if __BYTE_ORDER == __LITTLE_ENDIAN
# define TABORT ".byte 0x1d,0x07,%1,0x7c"
#else
# define TABORT ".byte 0x7c,%1,0x07,0x1d"
#endif
#define __force_inline inline __attribute__((__always_inline__))
#ifndef __HTM__
#define _TEXASRU_EXTRACT_BITS(TEXASR,BITNUM,SIZE) \
(((TEXASR) >> (31-(BITNUM))) & ((1<<(SIZE))-1))
#define _TEXASRU_FAILURE_PERSISTENT(TEXASRU) \
_TEXASRU_EXTRACT_BITS(TEXASRU, 7, 1)
#define _tbegin() \
({ unsigned int __ret; \
asm volatile ( \
TBEGIN "\t\n" \
"mfcr %0\t\n" \
"rlwinm %0,%0,3,1\t\n" \
"xori %0,%0,1\t\n" \
: "=r" (__ret) : \
: "cr0", "memory"); \
__ret; \
})
#define _tend() \
({ unsigned int __ret; \
asm volatile ( \
TEND "\t\n" \
"mfcr %0\t\n" \
"rlwinm %0,%0,3,1\t\n" \
"xori %0,%0,1\t\n" \
: "=r" (__ret) : \
: "cr0", "memory"); \
__ret; \
})
#define _tabort(__code) \
({ unsigned int __ret; \
asm volatile ( \
TABORT "\t\n" \
"mfcr %0\t\n" \
"rlwinm %0,%0,3,1\t\n" \
"xori %0,%0,1\t\n" \
: "=r" (__ret) : "r" (__code) \
: "cr0", "memory"); \
__ret; \
})
#define _texasru() \
({ unsigned long __ret; \
asm volatile ( \
"mfspr %0,131\t\n" \
: "=r" (__ret)); \
__ret; \
})
#define __libc_tbegin(tdb) _tbegin ()
#define __libc_tend(nested) _tend ()
#define __libc_tabort(abortcode) _tabort (abortcode)
#define __builtin_get_texasru() _texasru ()
#else
# include <htmintrin.h>
# ifdef __TM_FENCE__
/* New GCC behavior. */
# define __libc_tbegin(R) __builtin_tbegin (R)
# define __libc_tend(R) __builtin_tend (R)
# define __libc_tabort(R) __builtin_tabort (R)
# else
/* Workaround an old GCC behavior. Earlier releases of GCC 4.9 and 5.0,
didn't use to treat __builtin_tbegin, __builtin_tend and
__builtin_tabort as compiler barriers, moving instructions into and
out the transaction.
Remove this when glibc drops support for GCC 5.0. */
# define __libc_tbegin(R) \
({ __asm__ volatile("" ::: "memory"); \
unsigned int __ret = __builtin_tbegin (R); \
__asm__ volatile("" ::: "memory"); \
__ret; \
})
# define __libc_tabort(R) \
({ __asm__ volatile("" ::: "memory"); \
unsigned int __ret = __builtin_tabort (R); \
__asm__ volatile("" ::: "memory"); \
__ret; \
})
# define __libc_tend(R) \
({ __asm__ volatile("" ::: "memory"); \
unsigned int __ret = __builtin_tend (R); \
__asm__ volatile("" ::: "memory"); \
__ret; \
})
# endif /* __TM_FENCE__ */
#endif /* __HTM__ */
#endif /* __ASSEMBLER__ */
/* Definitions used for TEXASR Failure code (bits 0:7). If the failure
should be persistent, the abort code must be odd. 0xd0 through 0xff
are reserved for the kernel and potential hypervisor. */
#define _ABORT_PERSISTENT 0x01 /* An unspecified persistent abort. */
#define _ABORT_LOCK_BUSY 0x34 /* Busy lock, not persistent. */
#define _ABORT_NESTED_TRYLOCK (0x32 | _ABORT_PERSISTENT)
#define _ABORT_SYSCALL (0x30 | _ABORT_PERSISTENT)
#endif