From 6752404e779e38f9a125fe43339b6993073b1e4a Mon Sep 17 00:00:00 2001 From: Carlos O'Donell Date: Fri, 9 Jun 2006 01:25:30 +0000 Subject: [PATCH] 2006-06-08 Carlos O'Donell * sysdeps/hppa/hppa1.1/Implies: Remove ieee754/ldbl-128. * sysdeps/unix/sysv/linux/hppa/kernel-features.h [__LINUX_KERNEL_VERSION >= 0x020609]: Define __ASSUME_LWS_CAS. * sysdeps/unix/sysv/linux/hppa/bits/atomic.h: New file. --- ChangeLog.hppa | 7 + sysdeps/hppa/hppa1.1/Implies | 1 - sysdeps/unix/sysv/linux/hppa/bits/atomic.h | 120 ++++++++++++++++++ .../unix/sysv/linux/hppa/kernel-features.h | 5 + 4 files changed, 132 insertions(+), 1 deletion(-) create mode 100644 sysdeps/unix/sysv/linux/hppa/bits/atomic.h diff --git a/ChangeLog.hppa b/ChangeLog.hppa index 32f0f3f045..9373705784 100644 --- a/ChangeLog.hppa +++ b/ChangeLog.hppa @@ -1,3 +1,10 @@ +2006-06-08 Carlos O'Donell + + * sysdeps/hppa/hppa1.1/Implies: Remove ieee754/ldbl-128. + * sysdeps/unix/sysv/linux/hppa/kernel-features.h + [__LINUX_KERNEL_VERSION >= 0x020609]: Define __ASSUME_LWS_CAS. + * sysdeps/unix/sysv/linux/hppa/bits/atomic.h: New file. + 2006-06-08 Carlos O'Donell * sysdeps/unix/sysv/linux/hppa/bits/fcntl.h: Reformat diff --git a/sysdeps/hppa/hppa1.1/Implies b/sysdeps/hppa/hppa1.1/Implies index 5f935a299c..780c4e2467 100644 --- a/sysdeps/hppa/hppa1.1/Implies +++ b/sysdeps/hppa/hppa1.1/Implies @@ -1,4 +1,3 @@ wordsize-32 ieee754/flt-32 ieee754/dbl-64 -ieee754/ldbl-128 diff --git a/sysdeps/unix/sysv/linux/hppa/bits/atomic.h b/sysdeps/unix/sysv/linux/hppa/bits/atomic.h new file mode 100644 index 0000000000..36a540728e --- /dev/null +++ b/sysdeps/unix/sysv/linux/hppa/bits/atomic.h @@ -0,0 +1,120 @@ +/* Copyright (C) 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Carlos O'Donell , 2005. + + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include +#include +#include + +/* We need EFAULT, ENONSYS, and EAGAIN */ +#if !defined EFAULT && !defined ENOSYS && !defined EAGAIN +#undef EFAULT +#undef ENOSYS +#undef EAGAIN +#define EFAULT 14 +#define ENOSYS 251 +#define EAGAIN 11 +#endif + +#ifndef _BITS_ATOMIC_H +#define _BITS_ATOMIC_H 1 + +typedef int8_t atomic8_t; +typedef uint8_t uatomic8_t; +typedef int_fast8_t atomic_fast8_t; +typedef uint_fast8_t uatomic_fast8_t; + +typedef int32_t atomic32_t; +typedef uint32_t uatomic32_t; +typedef int_fast32_t atomic_fast32_t; +typedef uint_fast32_t uatomic_fast32_t; + +typedef intptr_t atomicptr_t; +typedef uintptr_t uatomicptr_t; +typedef intmax_t atomic_max_t; +typedef uintmax_t uatomic_max_t; + +/* prev = *addr; + if (prev == old) + *addr = new; + return prev; */ + +/* Use the kernel atomic light weight syscalls on hppa */ +#define LWS "0xb0" +#define LWS_CAS 0x0 +/* Note r31 is the link register */ +#define LWS_CLOBBER "r1", "r26", "r25", "r24", "r23", "r22", "r21", "r20", "r28", "r31", "memory" +#define ASM_EAGAIN "11" + +#if __ASSUME_LWS_CAS +/* The only basic operation needed is compare and exchange. */ +# define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \ + ({ \ + volatile int lws_errno = EFAULT; \ + volatile int lws_ret = 0xdeadbeef; \ + asm volatile( \ + "0: \n\t" \ + "copy %3, %%r26 \n\t" \ + "copy %4, %%r25 \n\t" \ + "copy %5, %%r24 \n\t" \ + "ble " LWS "(%%sr2, %%r0) \n\t" \ + "ldi 0, %%r20 \n\t" \ + "cmpib,=,n " ASM_EAGAIN ",%%r21,0 \n\t" \ + "nop \n\t" \ + "stw %%r28, %0 \n\t" \ + "sub %%r0, %%r21, %%r21 \n\t" \ + "stw %%r21, %1 \n\t" \ + : "=m" (lws_ret), "=m" (lws_errno), "=m" (*mem) \ + : "r" (mem), "r" (oldval), "r" (newval) \ + : LWS_CLOBBER \ + ); \ + \ + if(lws_errno == EFAULT || lws_errno == ENOSYS) \ + ABORT_INSTRUCTION; \ + \ + lws_ret; \ + }) + +# define atomic_compare_and_exchange_bool_acq(mem, newval, oldval) \ + ({ \ + int ret; \ + ret = atomic_compare_and_exchange_val_acq(mem, newval, oldval); \ + /* Return 1 if it was already acquired */ \ + (ret != oldval); \ + }) +#else +/* Non-atomic primitives. */ +# define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \ + ({ __typeof (mem) __gmemp = (mem); \ + __typeof (*mem) __gret = *__gmemp; \ + __typeof (*mem) __gnewval = (newval); \ + \ + if (__gret == (oldval)) \ + *__gmemp = __gnewval; \ + __gret; }) + +# define atomic_compare_and_exchange_bool_acq(mem, newval, oldval) \ + ({ __typeof (mem) __gmemp = (mem); \ + __typeof (*mem) __gnewval = (newval); \ + \ + *__gmemp == (oldval) ? (*__gmemp = __gnewval, 0) : 1; }) +#endif + +#endif /* bits/atomic.h */ + diff --git a/sysdeps/unix/sysv/linux/hppa/kernel-features.h b/sysdeps/unix/sysv/linux/hppa/kernel-features.h index 2fd416321b..e29f6e0c2f 100644 --- a/sysdeps/unix/sysv/linux/hppa/kernel-features.h +++ b/sysdeps/unix/sysv/linux/hppa/kernel-features.h @@ -31,4 +31,9 @@ #define __ASSUME_FCNTL64 1 #define __ASSUME_GETDENTS64_SYSCALL 1 +/* PA-RISC 2.6.9 kernels had the first LWS CAS support */ +#if __LINUX_KERNEL_VERSION >= 0x020609 +# define __ASSUME_LWS_CAS 1 +#endif + #include_next