From 79958c9e197edb190a79dbec3c224c7a0b54386e Mon Sep 17 00:00:00 2001 From: Stafford Horne Date: Thu, 16 Nov 2017 00:18:43 +0900 Subject: use atomic instructions for atomics Signed-off-by: Stafford Horne --- libc/sysdeps/linux/or1k/bits/atomic.h | 92 +++++++++++++++++++++++++++++++++++ 1 file changed, 92 insertions(+) create mode 100644 libc/sysdeps/linux/or1k/bits/atomic.h (limited to 'libc/sysdeps/linux') diff --git a/libc/sysdeps/linux/or1k/bits/atomic.h b/libc/sysdeps/linux/or1k/bits/atomic.h new file mode 100644 index 000000000..233bbdc47 --- /dev/null +++ b/libc/sysdeps/linux/or1k/bits/atomic.h @@ -0,0 +1,92 @@ +/* Copyright (C) 2010-2012 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Maxim Kuvyrkov , 2010. + + 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 + . */ + +#ifndef _OR1K_BITS_ATOMIC_H +#define _OR1K_BITS_ATOMIC_H + +#include + +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 int16_t atomic16_t; +typedef uint16_t uatomic16_t; +typedef int_fast16_t atomic_fast16_t; +typedef uint_fast16_t uatomic_fast16_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 int64_t atomic64_t; +typedef uint64_t uatomic64_t; +typedef int_fast64_t atomic_fast64_t; +typedef uint_fast64_t uatomic_fast64_t; + +typedef intptr_t atomicptr_t; +typedef uintptr_t uatomicptr_t; +typedef intmax_t atomic_max_t; +typedef uintmax_t uatomic_max_t; + + +#ifndef atomic_full_barrier +# define atomic_full_barrier() __asm__ ("" ::: "memory") +#endif + +#ifndef atomic_read_barrier +# define atomic_read_barrier() atomic_full_barrier () +#endif + +#ifndef atomic_write_barrier +# define atomic_write_barrier() atomic_full_barrier () +#endif + +#define atomic_exchange_acq(mem, newval) \ + ({ __typeof (newval) val; \ + \ + __asm__ volatile ( \ + "1: l.lwa %0, 0(%1) \n" \ + " l.swa 0(%1), %2 \n" \ + " l.bnf 1b \n" \ + " l.nop \n" \ + : "=&r"(val) \ + : "r"(mem), "r"(newval) \ + : "cc", "memory"); \ + val; }) + +#define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \ + ({ __typeof (newval) val; \ + \ + __asm__ volatile ( \ + "1: l.lwa %0, 0(%1) \n" \ + " l.sfeq %0, %2 \n" \ + " l.bnf 2f \n" \ + " l.nop \n" \ + " l.swa 0(%1), %3 \n" \ + " l.bnf 1b \n" \ + " l.nop \n" \ + "2: \n" \ + : "=&r"(val) \ + : "r"(mem), "r"(oldval), "r"(newval) \ + : "cc", "memory"); \ + val; }) + +#endif -- cgit v1.2.3