/usr/include/tbb/machine/mac_ppc.h is in libtbb-dev 4.2~20130725-1.1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 | /*
Copyright 2005-2013 Intel Corporation. All Rights Reserved.
This file is part of Threading Building Blocks.
Threading Building Blocks is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License
version 2 as published by the Free Software Foundation.
Threading Building Blocks 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with Threading Building Blocks; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
As a special exception, you may use this file as part of a free software
library without restriction. Specifically, if other files instantiate
templates or use macros or inline functions from this file, or you compile
this file and link it with other files to produce an executable, this
file does not by itself cause the resulting executable to be covered by
the GNU General Public License. This exception does not however
invalidate any other reasons why the executable file might be covered by
the GNU General Public License.
*/
#if !defined(__TBB_machine_H) || defined(__TBB_machine_gcc_power_H)
#error Do not #include this internal file directly; use public TBB headers instead.
#endif
#define __TBB_machine_gcc_power_H
#include <stdint.h>
#include <unistd.h>
// TODO: rename to gcc_power.h?
// This file is for Power Architecture with compilers supporting GNU inline-assembler syntax (currently GNU g++ and IBM XL).
// Note that XL V9.0 (sometimes?) has trouble dealing with empty input and/or clobber lists, so they should be avoided.
#if __powerpc64__ || __ppc64__
// IBM XL documents __powerpc64__ (and __PPC64__).
// Apple documents __ppc64__ (with __ppc__ only on 32-bit).
#define __TBB_WORDSIZE 8
#else
#define __TBB_WORDSIZE 4
#endif
// Traditionally Power Architecture is big-endian.
// Little-endian could be just an address manipulation (compatibility with TBB not verified),
// or normal little-endian (on more recent systems). Embedded PowerPC systems may support
// page-specific endianness, but then one endianness must be hidden from TBB so that it still sees only one.
#if __BIG_ENDIAN__ || (defined(__BYTE_ORDER__) && __BYTE_ORDER__==__ORDER_BIG_ENDIAN__)
#define __TBB_ENDIANNESS __TBB_ENDIAN_BIG
#elif __LITTLE_ENDIAN__ || (defined(__BYTE_ORDER__) && __BYTE_ORDER__==__ORDER_LITTLE_ENDIAN__)
#define __TBB_ENDIANNESS __TBB_ENDIAN_LITTLE
#elif defined(__BYTE_ORDER__)
#define __TBB_ENDIANNESS __TBB_ENDIAN_UNSUPPORTED
#else
#define __TBB_ENDIANNESS __TBB_ENDIAN_DETECT
#endif
// On Power Architecture, (lock-free) 64-bit atomics require 64-bit hardware:
#if __TBB_WORDSIZE==8
// Do not change the following definition, because TBB itself will use 64-bit atomics in 64-bit builds.
#define __TBB_64BIT_ATOMICS 1
#elif __bgp__
// Do not change the following definition, because this is known 32-bit hardware.
#define __TBB_64BIT_ATOMICS 0
#else
// To enable 64-bit atomics in 32-bit builds, set the value below to 1 instead of 0.
// You must make certain that the program will only use them on actual 64-bit hardware
// (which typically means that the entire program is only executed on such hardware),
// because their implementation involves machine instructions that are illegal elsewhere.
// The setting can be chosen independently per compilation unit,
// which also means that TBB itself does not need to be rebuilt.
// Alternatively (but only for the current architecture and TBB version),
// override the default as a predefined macro when invoking the compiler.
#ifndef __TBB_64BIT_ATOMICS
#define __TBB_64BIT_ATOMICS 0
#endif
#endif
inline int32_t __TBB_machine_cmpswp4 (volatile void *ptr, int32_t value, int32_t comparand )
{
int32_t result;
__asm__ __volatile__("sync\n"
"0:\n\t"
"lwarx %[res],0,%[ptr]\n\t" /* load w/ reservation */
"cmpw %[res],%[cmp]\n\t" /* compare against comparand */
"bne- 1f\n\t" /* exit if not same */
"stwcx. %[val],0,%[ptr]\n\t" /* store new value */
"bne- 0b\n" /* retry if reservation lost */
"1:\n\t" /* the exit */
"isync"
: [res]"=&r"(result)
, "+m"(* (int32_t*) ptr) /* redundant with "memory" */
: [ptr]"r"(ptr)
, [val]"r"(value)
, [cmp]"r"(comparand)
: "memory" /* compiler full fence */
, "cr0" /* clobbered by cmp and/or stwcx. */
);
return result;
}
#if __TBB_WORDSIZE==8
inline int64_t __TBB_machine_cmpswp8 (volatile void *ptr, int64_t value, int64_t comparand )
{
int64_t result;
__asm__ __volatile__("sync\n"
"0:\n\t"
"ldarx %[res],0,%[ptr]\n\t" /* load w/ reservation */
"cmpd %[res],%[cmp]\n\t" /* compare against comparand */
"bne- 1f\n\t" /* exit if not same */
"stdcx. %[val],0,%[ptr]\n\t" /* store new value */
"bne- 0b\n" /* retry if reservation lost */
"1:\n\t" /* the exit */
"isync"
: [res]"=&r"(result)
, "+m"(* (int64_t*) ptr) /* redundant with "memory" */
: [ptr]"r"(ptr)
, [val]"r"(value)
, [cmp]"r"(comparand)
: "memory" /* compiler full fence */
, "cr0" /* clobbered by cmp and/or stdcx. */
);
return result;
}
#elif __TBB_64BIT_ATOMICS /* && __TBB_WORDSIZE==4 */
inline int64_t __TBB_machine_cmpswp8 (volatile void *ptr, int64_t value, int64_t comparand )
{
int64_t result;
int64_t value_register, comparand_register, result_register; // dummy variables to allocate registers
__asm__ __volatile__("sync\n\t"
"ld %[val],%[valm]\n\t"
"ld %[cmp],%[cmpm]\n"
"0:\n\t"
"ldarx %[res],0,%[ptr]\n\t" /* load w/ reservation */
"cmpd %[res],%[cmp]\n\t" /* compare against comparand */
"bne- 1f\n\t" /* exit if not same */
"stdcx. %[val],0,%[ptr]\n\t" /* store new value */
"bne- 0b\n" /* retry if reservation lost */
"1:\n\t" /* the exit */
"std %[res],%[resm]\n\t"
"isync"
: [resm]"=m"(result)
, [res] "=&r"( result_register)
, [val] "=&r"( value_register)
, [cmp] "=&r"(comparand_register)
, "+m"(* (int64_t*) ptr) /* redundant with "memory" */
: [ptr] "r"(ptr)
, [valm]"m"(value)
, [cmpm]"m"(comparand)
: "memory" /* compiler full fence */
, "cr0" /* clobbered by cmpd and/or stdcx. */
);
return result;
}
#endif /* __TBB_WORDSIZE==4 && __TBB_64BIT_ATOMICS */
#define __TBB_MACHINE_DEFINE_LOAD_STORE(S,ldx,stx,cmpx) \
template <typename T> \
struct machine_load_store<T,S> { \
static inline T load_with_acquire(const volatile T& location) { \
T result; \
__asm__ __volatile__(ldx " %[res],0(%[ptr])\n" \
"0:\n\t" \
cmpx " %[res],%[res]\n\t" \
"bne- 0b\n\t" \
"isync" \
: [res]"=r"(result) \
: [ptr]"b"(&location) /* cannot use register 0 here */ \
, "m"(location) /* redundant with "memory" */ \
: "memory" /* compiler acquire fence */ \
, "cr0" /* clobbered by cmpw/cmpd */); \
return result; \
} \
static inline void store_with_release(volatile T &location, T value) { \
__asm__ __volatile__("lwsync\n\t" \
stx " %[val],0(%[ptr])" \
: "=m"(location) /* redundant with "memory" */ \
: [ptr]"b"(&location) /* cannot use register 0 here */ \
, [val]"r"(value) \
: "memory"/*compiler release fence*/ /*(cr0 not affected)*/); \
} \
}; \
\
template <typename T> \
struct machine_load_store_relaxed<T,S> { \
static inline T load (const __TBB_atomic T& location) { \
T result; \
__asm__ __volatile__(ldx " %[res],0(%[ptr])" \
: [res]"=r"(result) \
: [ptr]"b"(&location) /* cannot use register 0 here */ \
, "m"(location) \
); /*(no compiler fence)*/ /*(cr0 not affected)*/ \
return result; \
} \
static inline void store (__TBB_atomic T &location, T value) { \
__asm__ __volatile__(stx " %[val],0(%[ptr])" \
: "=m"(location) \
: [ptr]"b"(&location) /* cannot use register 0 here */ \
, [val]"r"(value) \
); /*(no compiler fence)*/ /*(cr0 not affected)*/ \
} \
};
namespace tbb {
namespace internal {
__TBB_MACHINE_DEFINE_LOAD_STORE(1,"lbz","stb","cmpw")
__TBB_MACHINE_DEFINE_LOAD_STORE(2,"lhz","sth","cmpw")
__TBB_MACHINE_DEFINE_LOAD_STORE(4,"lwz","stw","cmpw")
#if __TBB_WORDSIZE==8
__TBB_MACHINE_DEFINE_LOAD_STORE(8,"ld" ,"std","cmpd")
#elif __TBB_64BIT_ATOMICS /* && __TBB_WORDSIZE==4 */
template <typename T>
struct machine_load_store<T,8> {
static inline T load_with_acquire(const volatile T& location) {
T result;
T result_register; // dummy variable to allocate a register
__asm__ __volatile__("ld %[res],0(%[ptr])\n\t"
"std %[res],%[resm]\n"
"0:\n\t"
"cmpd %[res],%[res]\n\t"
"bne- 0b\n\t"
"isync"
: [resm]"=m"(result)
, [res]"=&r"(result_register)
: [ptr]"b"(&location) /* cannot use register 0 here */
, "m"(location) /* redundant with "memory" */
: "memory" /* compiler acquire fence */
, "cr0" /* clobbered by cmpd */);
return result;
}
static inline void store_with_release(volatile T &location, T value) {
T value_register; // dummy variable to allocate a register
__asm__ __volatile__("lwsync\n\t"
"ld %[val],%[valm]\n\t"
"std %[val],0(%[ptr])"
: "=m"(location) /* redundant with "memory" */
, [val]"=&r"(value_register)
: [ptr]"b"(&location) /* cannot use register 0 here */
, [valm]"m"(value)
: "memory"/*compiler release fence*/ /*(cr0 not affected)*/);
}
};
struct machine_load_store_relaxed<T,8> {
static inline T load (const volatile T& location) {
T result;
T result_register; // dummy variable to allocate a register
__asm__ __volatile__("ld %[res],0(%[ptr])\n\t"
"std %[res],%[resm]"
: [resm]"=m"(result)
, [res]"=&r"(result_register)
: [ptr]"b"(&location) /* cannot use register 0 here */
, "m"(location)
); /*(no compiler fence)*/ /*(cr0 not affected)*/
return result;
}
static inline void store (volatile T &location, T value) {
T value_register; // dummy variable to allocate a register
__asm__ __volatile__("ld %[val],%[valm]\n\t"
"std %[val],0(%[ptr])"
: "=m"(location)
, [val]"=&r"(value_register)
: [ptr]"b"(&location) /* cannot use register 0 here */
, [valm]"m"(value)
); /*(no compiler fence)*/ /*(cr0 not affected)*/
}
};
#define __TBB_machine_load_store_relaxed_8
#endif /* __TBB_WORDSIZE==4 && __TBB_64BIT_ATOMICS */
}} // namespaces internal, tbb
#undef __TBB_MACHINE_DEFINE_LOAD_STORE
#define __TBB_USE_GENERIC_PART_WORD_CAS 1
#define __TBB_USE_GENERIC_FETCH_ADD 1
#define __TBB_USE_GENERIC_FETCH_STORE 1
#define __TBB_USE_GENERIC_SEQUENTIAL_CONSISTENCY_LOAD_STORE 1
#define __TBB_control_consistency_helper() __asm__ __volatile__("isync": : :"memory")
#define __TBB_full_memory_fence() __asm__ __volatile__( "sync": : :"memory")
static inline intptr_t __TBB_machine_lg( uintptr_t x ) {
__TBB_ASSERT(x, "__TBB_Log2(0) undefined");
// cntlzd/cntlzw starts counting at 2^63/2^31 (ignoring any higher-order bits), and does not affect cr0
#if __TBB_WORDSIZE==8
__asm__ __volatile__ ("cntlzd %0,%0" : "+r"(x));
return 63-static_cast<intptr_t>(x);
#else
__asm__ __volatile__ ("cntlzw %0,%0" : "+r"(x));
return 31-static_cast<intptr_t>(x);
#endif
}
#define __TBB_Log2(V) __TBB_machine_lg(V)
// Assumes implicit alignment for any 32-bit value
typedef uint32_t __TBB_Flag;
#define __TBB_Flag __TBB_Flag
inline bool __TBB_machine_trylockbyte( __TBB_atomic __TBB_Flag &flag ) {
return __TBB_machine_cmpswp4(&flag,1,0)==0;
}
#define __TBB_TryLockByte(P) __TBB_machine_trylockbyte(P)
|