diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/s390/htm.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/htm.h | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/htm.h b/sysdeps/unix/sysv/linux/s390/htm.h deleted file mode 100644 index 70d7f66000..0000000000 --- a/sysdeps/unix/sysv/linux/s390/htm.h +++ /dev/null @@ -1,187 +0,0 @@ -/* Shared HTM header. Work around false transactional execution facility - intrinsics. - - Copyright (C) 2016-2017 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 - <http://www.gnu.org/licenses/>. */ - -#ifndef _HTM_H -#define _HTM_H 1 - -#include <htmintrin.h> - -#ifdef __s390x__ -# define TX_FPRS_BYTES 64 -# define TX_SAVE_FPRS \ - " std %%f8, 0(%[R_FPRS])\n\t" \ - " std %%f9, 8(%[R_FPRS])\n\t" \ - " std %%f10, 16(%[R_FPRS])\n\t" \ - " std %%f11, 24(%[R_FPRS])\n\t" \ - " std %%f12, 32(%[R_FPRS])\n\t" \ - " std %%f13, 40(%[R_FPRS])\n\t" \ - " std %%f14, 48(%[R_FPRS])\n\t" \ - " std %%f15, 56(%[R_FPRS])\n\t" - -# define TX_RESTORE_FPRS \ - " ld %%f8, 0(%[R_FPRS])\n\t" \ - " ld %%f9, 8(%[R_FPRS])\n\t" \ - " ld %%f10, 16(%[R_FPRS])\n\t" \ - " ld %%f11, 24(%[R_FPRS])\n\t" \ - " ld %%f12, 32(%[R_FPRS])\n\t" \ - " ld %%f13, 40(%[R_FPRS])\n\t" \ - " ld %%f14, 48(%[R_FPRS])\n\t" \ - " ld %%f15, 56(%[R_FPRS])\n\t" - -#else - -# define TX_FPRS_BYTES 16 -# define TX_SAVE_FPRS \ - " std %%f4, 0(%[R_FPRS])\n\t" \ - " std %%f6, 8(%[R_FPRS])\n\t" - -# define TX_RESTORE_FPRS \ - " ld %%f4, 0(%[R_FPRS])\n\t" \ - " ld %%f6, 8(%[R_FPRS])\n\t" - -#endif /* ! __s390x__ */ - -/* Use own inline assembly instead of __builtin_tbegin, as tbegin - has to filter program interruptions which can't be done with the builtin. - Now the fprs have to be saved / restored here, too. - The fpc is also not saved / restored with the builtin. - The used inline assembly does not clobber the volatile fprs / vrs! - Clobbering the latter ones would force the compiler to save / restore - the call saved fprs as those overlap with the vrs, but they only need to be - restored if the transaction fails but not if the transaction is successfully - started. Thus the user of the tbegin macros in this header file has to - compile the file / function with -msoft-float. It prevents gcc from using - fprs / vrs. */ -#define __libc_tbegin(tdb) __libc_tbegin_base(tdb,,,) - -#define __libc_tbegin_retry_output_regs , [R_TX_CNT] "+&d" (__tx_cnt) -#define __libc_tbegin_retry_input_regs(retry_cnt) , [R_RETRY] "d" (retry_cnt) -#define __libc_tbegin_retry_abort_path_insn \ - /* If tbegin returned _HTM_TBEGIN_TRANSIENT, retry immediately so \ - that max tbegin_cnt transactions are tried. Otherwise return and \ - let the caller of this macro do the fallback path. */ \ - " jnh 1f\n\t" /* cc 1/3: jump to fallback path. */ \ - /* tbegin returned _HTM_TBEGIN_TRANSIENT: retry with transaction. */ \ - " crje %[R_TX_CNT], %[R_RETRY], 1f\n\t" /* Reached max retries? */ \ - " ahi %[R_TX_CNT], 1\n\t" \ - " ppa %[R_TX_CNT], 0, 1\n\t" /* Transaction-Abort Assist. */ \ - " j 2b\n\t" /* Loop to tbegin. */ - -/* Same as __libc_tbegin except if tbegin aborts with _HTM_TBEGIN_TRANSIENT. - Then this macros restores the fpc, fprs and automatically retries up to - retry_cnt tbegins. Further saving of the state is omitted as it is already - saved. This macro calls tbegin at most as retry_cnt + 1 times. */ -#define __libc_tbegin_retry(tdb, retry_cnt) \ - ({ int __ret; \ - int __tx_cnt = 0; \ - __ret = __libc_tbegin_base(tdb, \ - __libc_tbegin_retry_abort_path_insn, \ - __libc_tbegin_retry_output_regs, \ - __libc_tbegin_retry_input_regs(retry_cnt)); \ - __ret; \ - }) - -#define __libc_tbegin_base(tdb, abort_path_insn, output_regs, input_regs) \ - ({ int __ret; \ - int __fpc; \ - char __fprs[TX_FPRS_BYTES]; \ - __asm__ __volatile__ (".machine push\n\t" \ - ".machinemode \"zarch_nohighgprs\"\n\t" \ - ".machine \"all\"\n\t" \ - /* Save state at the outermost transaction. \ - As extracting nesting depth is expensive \ - on at least zEC12, save fprs at inner \ - transactions, too. \ - The fpc and fprs are saved here as they \ - are not saved by tbegin. There exist no \ - call-saved vrs, thus they are not saved \ - here. */ \ - " efpc %[R_FPC]\n\t" \ - TX_SAVE_FPRS \ - /* Begin transaction: save all gprs, allow \ - ar modification and fp operations. Some \ - program-interruptions (e.g. a null \ - pointer access) are filtered and the \ - transaction will abort. In this case \ - the normal lock path will execute it \ - again and result in a core dump wich does \ - now show at tbegin but the real executed \ - instruction. \ - However it is not guaranteed that this \ - retry operate on the same data and thus \ - may not end in an program-interruption. \ - Note: This could also be used to probe \ - memory for being accessible! */ \ - "2: tbegin 0, 0xFF0E\n\t" \ - /* Branch away in abort case (this is the \ - prefered sequence. See PoP in chapter 5 \ - Transactional-Execution Facility \ - Operation). */ \ - " jnz 0f\n\t" \ - /* Transaction has successfully started. */ \ - " lhi %[R_RET], 0\n\t" \ - " j 1f\n\t" \ - /* Transaction has aborted. Now we are at \ - the outermost transaction. Restore fprs \ - and fpc. */ \ - "0: ipm %[R_RET]\n\t" \ - " srl %[R_RET], 28\n\t" \ - " sfpc %[R_FPC]\n\t" \ - TX_RESTORE_FPRS \ - abort_path_insn \ - "1:\n\t" \ - ".machine pop\n" \ - : [R_RET] "=&d" (__ret), \ - [R_FPC] "=&d" (__fpc) \ - output_regs \ - : [R_FPRS] "a" (__fprs) \ - input_regs \ - : "cc", "memory"); \ - __ret; \ - }) - -/* These builtins are usable in context of glibc lock elision code without any - changes. Use them. */ -#define __libc_tend() \ - ({ __asm__ __volatile__ (".machine push\n\t" \ - ".machinemode \"zarch_nohighgprs\"\n\t" \ - ".machine \"all\"\n\t"); \ - int __ret = __builtin_tend (); \ - __asm__ __volatile__ (".machine pop"); \ - __ret; \ - }) - -#define __libc_tabort(abortcode) \ - __asm__ __volatile__ (".machine push\n\t" \ - ".machinemode \"zarch_nohighgprs\"\n\t" \ - ".machine \"all\"\n\t"); \ - __builtin_tabort (abortcode); \ - __asm__ __volatile__ (".machine pop") - -#define __libc_tx_nesting_depth() \ - ({ __asm__ __volatile__ (".machine push\n\t" \ - ".machinemode \"zarch_nohighgprs\"\n\t" \ - ".machine \"all\"\n\t"); \ - int __ret = __builtin_tx_nesting_depth (); \ - __asm__ __volatile__ (".machine pop"); \ - __ret; \ - }) - -#endif |