2 Copyright 2005-2010 Intel Corporation. All Rights Reserved.
4 This file is part of Threading Building Blocks.
6 Threading Building Blocks is free software; you can redistribute it
7 and/or modify it under the terms of the GNU General Public License
8 version 2 as published by the Free Software Foundation.
10 Threading Building Blocks is distributed in the hope that it will be
11 useful, but WITHOUT ANY WARRANTY; without even the implied warranty
12 of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with Threading Building Blocks; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 As a special exception, you may use this file as part of a free software
20 library without restriction. Specifically, if other files instantiate
21 templates or use macros or inline functions from this file, or you compile
22 this file and link it with other files to produce an executable, this
23 file does not by itself cause the resulting executable to be covered by
24 the GNU General Public License. This exception does not however
25 invalidate any other reasons why the executable file might be covered by
26 the GNU General Public License.
29 #ifndef __TBB_machine_H
30 #error Do not include this file directly; include tbb_machine.h instead
34 #include "linux_common.h"
37 #define __TBB_WORDSIZE 4
38 #define __TBB_BIG_ENDIAN 0
40 #define __TBB_release_consistency_helper() __asm__ __volatile__("": : :"memory")
42 inline void __TBB_rel_acq_fence() { __asm__ __volatile__("mfence": : :"memory"); }
44 #if __TBB_ICC_ASM_VOLATILE_BROKEN
45 #define __TBB_VOLATILE
47 #define __TBB_VOLATILE volatile
50 #define __MACHINE_DECL_ATOMICS(S,T,X) \
51 static inline T __TBB_machine_cmpswp##S (volatile void *ptr, T value, T comparand ) \
55 __asm__ __volatile__("lock\ncmpxchg" X " %2,%1" \
56 : "=a"(result), "=m"(*(__TBB_VOLATILE T*)ptr) \
57 : "q"(value), "0"(comparand), "m"(*(__TBB_VOLATILE T*)ptr) \
62 static inline T __TBB_machine_fetchadd##S(volatile void *ptr, T addend) \
65 __asm__ __volatile__("lock\nxadd" X " %0,%1" \
66 : "=r"(result), "=m"(*(__TBB_VOLATILE T*)ptr) \
67 : "0"(addend), "m"(*(__TBB_VOLATILE T*)ptr) \
72 static inline T __TBB_machine_fetchstore##S(volatile void *ptr, T value) \
75 __asm__ __volatile__("lock\nxchg" X " %0,%1" \
76 : "=r"(result), "=m"(*(__TBB_VOLATILE T*)ptr) \
77 : "0"(value), "m"(*(__TBB_VOLATILE T*)ptr) \
82 __MACHINE_DECL_ATOMICS(1,int8_t,"")
83 __MACHINE_DECL_ATOMICS(2,int16_t,"")
84 __MACHINE_DECL_ATOMICS(4,int32_t,"l")
86 static inline int64_t __TBB_machine_cmpswp8 (volatile void *ptr, int64_t value, int64_t comparand )
90 /* compiling position-independent code */
91 // EBX register preserved for compliance with position-independent code rules on IA32
92 __asm__ __volatile__ (
94 "movl (%%ecx),%%ebx\n\t"
95 "movl 4(%%ecx),%%ecx\n\t"
96 "lock\n\t cmpxchg8b %1\n\t"
98 : "=A"(result), "=m"(*(int64_t *)ptr)
99 : "m"(*(int64_t *)ptr)
113 __asm__ __volatile__ (
114 "lock\n\t cmpxchg8b %1\n\t"
115 : "=A"(result), "=m"(*(__TBB_VOLATILE int64_t *)ptr)
116 : "m"(*(__TBB_VOLATILE int64_t *)ptr)
118 , "b"(i32[0]), "c"(i32[1])
125 static inline int32_t __TBB_machine_lg( uint32_t x ) {
127 __asm__ ("bsr %1,%0" : "=r"(j) : "r"(x));
131 static inline void __TBB_machine_or( volatile void *ptr, uint32_t addend ) {
132 __asm__ __volatile__("lock\norl %1,%0" : "=m"(*(__TBB_VOLATILE uint32_t *)ptr) : "r"(addend), "m"(*(__TBB_VOLATILE uint32_t *)ptr) : "memory");
135 static inline void __TBB_machine_and( volatile void *ptr, uint32_t addend ) {
136 __asm__ __volatile__("lock\nandl %1,%0" : "=m"(*(__TBB_VOLATILE uint32_t *)ptr) : "r"(addend), "m"(*(__TBB_VOLATILE uint32_t *)ptr) : "memory");
139 static inline void __TBB_machine_pause( int32_t delay ) {
140 for (int32_t i = 0; i < delay; i++) {
141 __asm__ __volatile__("pause;");
146 static inline int64_t __TBB_machine_load8 (const volatile void *ptr) {
148 if( ((uint32_t)ptr&7u)==0 ) {
150 __asm__ __volatile__ ( "fildq %1\n\t"
151 "fistpq %0" : "=m"(result) : "m"(*(const __TBB_VOLATILE uint64_t*)ptr) : "memory" );
154 result = __TBB_machine_cmpswp8(const_cast<void*>(ptr),0,0);
159 //! Handles misaligned 8-byte store
160 /** Defined in tbb_misc.cpp */
161 extern "C" void __TBB_machine_store8_slow( volatile void *ptr, int64_t value );
162 extern "C" void __TBB_machine_store8_slow_perf_warning( volatile void *ptr );
164 static inline void __TBB_machine_store8(volatile void *ptr, int64_t value) {
165 if( ((uint32_t)ptr&7u)==0 ) {
167 __asm__ __volatile__ ( "fildq %1\n\t"
168 "fistpq %0" : "=m"(*(__TBB_VOLATILE int64_t*)ptr) : "m"(value) : "memory" );
171 #if TBB_USE_PERFORMANCE_WARNINGS
172 __TBB_machine_store8_slow_perf_warning(ptr);
173 #endif /* TBB_USE_PERFORMANCE_WARNINGS */
174 __TBB_machine_store8_slow(ptr,value);
178 template <typename T, size_t S>
179 struct __TBB_machine_load_store {
180 static inline T load_with_acquire(const volatile T& location) {
181 T to_return = location;
182 __asm__ __volatile__("" : : : "memory" ); // Compiler fence to keep operations from migrating upwards
186 static inline void store_with_release(volatile T &location, T value) {
187 __asm__ __volatile__("" : : : "memory" ); // Compiler fence to keep operations from migrating upwards
192 template <typename T>
193 struct __TBB_machine_load_store<T,8> {
194 static inline T load_with_acquire(const volatile T& location) {
195 T to_return = __TBB_machine_load8((const volatile void *)&location);
196 __asm__ __volatile__("" : : : "memory" ); // Compiler fence to keep operations from migrating upwards
200 static inline void store_with_release(volatile T &location, T value) {
201 __asm__ __volatile__("" : : : "memory" ); // Compiler fence to keep operations from migrating downwards
202 __TBB_machine_store8((volatile void *)&location,(int64_t)value);
206 #undef __TBB_VOLATILE
209 inline T __TBB_machine_load_with_acquire(const volatile T &location) {
210 return __TBB_machine_load_store<T,sizeof(T)>::load_with_acquire(location);
213 template<typename T, typename V>
214 inline void __TBB_machine_store_with_release(volatile T &location, V value) {
215 __TBB_machine_load_store<T,sizeof(T)>::store_with_release(location,value);
218 #define __TBB_load_with_acquire(L) __TBB_machine_load_with_acquire((L))
219 #define __TBB_store_with_release(L,V) __TBB_machine_store_with_release((L),(V))
221 // Machine specific atomic operations
223 #define __TBB_CompareAndSwap1(P,V,C) __TBB_machine_cmpswp1(P,V,C)
224 #define __TBB_CompareAndSwap2(P,V,C) __TBB_machine_cmpswp2(P,V,C)
225 #define __TBB_CompareAndSwap4(P,V,C) __TBB_machine_cmpswp4(P,V,C)
226 #define __TBB_CompareAndSwap8(P,V,C) __TBB_machine_cmpswp8(P,V,C)
227 #define __TBB_CompareAndSwapW(P,V,C) __TBB_machine_cmpswp4(P,V,C)
229 #define __TBB_FetchAndAdd1(P,V) __TBB_machine_fetchadd1(P,V)
230 #define __TBB_FetchAndAdd2(P,V) __TBB_machine_fetchadd2(P,V)
231 #define __TBB_FetchAndAdd4(P,V) __TBB_machine_fetchadd4(P,V)
232 #define __TBB_FetchAndAddW(P,V) __TBB_machine_fetchadd4(P,V)
234 #define __TBB_FetchAndStore1(P,V) __TBB_machine_fetchstore1(P,V)
235 #define __TBB_FetchAndStore2(P,V) __TBB_machine_fetchstore2(P,V)
236 #define __TBB_FetchAndStore4(P,V) __TBB_machine_fetchstore4(P,V)
237 #define __TBB_FetchAndStoreW(P,V) __TBB_machine_fetchstore4(P,V)
239 #define __TBB_Store8(P,V) __TBB_machine_store8(P,V)
240 #define __TBB_Load8(P) __TBB_machine_load8(P)
242 #define __TBB_AtomicOR(P,V) __TBB_machine_or(P,V)
243 #define __TBB_AtomicAND(P,V) __TBB_machine_and(P,V)
246 // Those we chose not to implement (they will be implemented generically using CMPSWP8)
247 #undef __TBB_FetchAndAdd8
248 #undef __TBB_FetchAndStore8
250 // Definition of other functions
251 #define __TBB_Pause(V) __TBB_machine_pause(V)
252 #define __TBB_Log2(V) __TBB_machine_lg(V)
254 // Special atomic functions
255 #define __TBB_FetchAndAddWrelease(P,V) __TBB_FetchAndAddW(P,V)
256 #define __TBB_FetchAndIncrementWacquire(P) __TBB_FetchAndAddW(P,1)
257 #define __TBB_FetchAndDecrementWrelease(P) __TBB_FetchAndAddW(P,-1)
259 // Use generic definitions from tbb_machine.h
260 #undef __TBB_TryLockByte
261 #undef __TBB_LockByte