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| author | Andrew MacLeod <amacleod@redhat.com> | 2011-11-28 20:28:23 +0000 |
|---|---|---|
| committer | Andrew Macleod <amacleod@gcc.gnu.org> | 2011-11-28 20:28:23 +0000 |
| commit | 62bad7cd053b0f139bb46ae54976ed97d6dc0811 (patch) | |
| tree | 41f01c8dcbd30412c4d9012cc48d334d8a6fd38c /gcc/c-family/c-cppbuiltin.c | |
| parent | f9c55897eb729f68881d8f729fb112040bec695a (diff) | |
| download | gcc-62bad7cd053b0f139bb46ae54976ed97d6dc0811.zip gcc-62bad7cd053b0f139bb46ae54976ed97d6dc0811.tar.gz gcc-62bad7cd053b0f139bb46ae54976ed97d6dc0811.tar.bz2 | |
c-family
* c-cpp-builtin.c (cpp_atomic_builtins):New. Emit all atomic
predefines in one place. Add LOCK_FREE predefines.
(c_cpp_builtins): Move Legacy HAVE_SYNC predefines to
new func.
libstdc++-v3
* include/bits/atomic_base.h (ATOMIC_*_LOCK_FREE): Use new cpp
predefined macros.
* testsuite/29_atomics/headers/atomic/macros.cc: Add BOOL and POINTER
macro checks. Check for expected compile time values.
From-SVN: r181784
Diffstat (limited to 'gcc/c-family/c-cppbuiltin.c')
| -rw-r--r-- | gcc/c-family/c-cppbuiltin.c | 160 |
1 files changed, 113 insertions, 47 deletions
diff --git a/gcc/c-family/c-cppbuiltin.c b/gcc/c-family/c-cppbuiltin.c index bf83c26..8d0d4af 100644 --- a/gcc/c-family/c-cppbuiltin.c +++ b/gcc/c-family/c-cppbuiltin.c @@ -568,6 +568,117 @@ c_cpp_builtins_optimize_pragma (cpp_reader *pfile, tree prev_tree, } +/* This function will emit cpp macros to indicate the presence of various lock + free atomic operations. */ + +static void +cpp_atomic_builtins (cpp_reader *pfile) +{ + /* Set a flag for each size of object that compare and swap exists for up to + a 16 byte object. */ +#define SWAP_LIMIT 17 + bool have_swap[SWAP_LIMIT]; + unsigned int psize; + + /* Clear the map of sizes compare_and swap exists for. */ + memset (have_swap, 0, sizeof (have_swap)); + + /* Tell source code if the compiler makes sync_compare_and_swap + builtins available. */ +#ifndef HAVE_sync_compare_and_swapqi +#define HAVE_sync_compare_and_swapqi 0 +#endif +#ifndef HAVE_atomic_compare_and_swapqi +#define HAVE_atomic_compare_and_swapqi 0 +#endif + + if (HAVE_sync_compare_and_swapqi || HAVE_atomic_compare_and_swapqi) + { + cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1"); + have_swap[1] = true; + } + +#ifndef HAVE_sync_compare_and_swaphi +#define HAVE_sync_compare_and_swaphi 0 +#endif +#ifndef HAVE_atomic_compare_and_swaphi +#define HAVE_atomic_compare_and_swaphi 0 +#endif + if (HAVE_sync_compare_and_swaphi || HAVE_atomic_compare_and_swaphi) + { + cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2"); + have_swap[2] = true; + } + +#ifndef HAVE_sync_compare_and_swapsi +#define HAVE_sync_compare_and_swapsi 0 +#endif +#ifndef HAVE_atomic_compare_and_swapsi +#define HAVE_atomic_compare_and_swapsi 0 +#endif + if (HAVE_sync_compare_and_swapsi || HAVE_atomic_compare_and_swapsi) + { + cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4"); + have_swap[4] = true; + } + +#ifndef HAVE_sync_compare_and_swapdi +#define HAVE_sync_compare_and_swapdi 0 +#endif +#ifndef HAVE_atomic_compare_and_swapdi +#define HAVE_atomic_compare_and_swapdi 0 +#endif + if (HAVE_sync_compare_and_swapdi || HAVE_atomic_compare_and_swapdi) + { + cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8"); + have_swap[8] = true; + } + +#ifndef HAVE_sync_compare_and_swapti +#define HAVE_sync_compare_and_swapti 0 +#endif +#ifndef HAVE_atomic_compare_and_swapti +#define HAVE_atomic_compare_and_swapti 0 +#endif + if (HAVE_sync_compare_and_swapti || HAVE_atomic_compare_and_swapti) + { + cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16"); + have_swap[16] = true; + } + + /* Tell the source code about various types. These map to the C++11 and C1x + macros where 2 indicates lock-free always, and 1 indicates sometimes + lock free. */ +#define SIZEOF_NODE(T) (tree_low_cst (TYPE_SIZE_UNIT (T), 1)) +#define SWAP_INDEX(T) ((SIZEOF_NODE (T) < SWAP_LIMIT) ? SIZEOF_NODE (T) : 0) + builtin_define_with_int_value ("__GCC_ATOMIC_BOOL_LOCK_FREE", + (have_swap[SWAP_INDEX (boolean_type_node)]? 2 : 1)); + builtin_define_with_int_value ("__GCC_ATOMIC_CHAR_LOCK_FREE", + (have_swap[SWAP_INDEX (signed_char_type_node)]? 2 : 1)); + builtin_define_with_int_value ("__GCC_ATOMIC_CHAR16_T_LOCK_FREE", + (have_swap[SWAP_INDEX (char16_type_node)]? 2 : 1)); + builtin_define_with_int_value ("__GCC_ATOMIC_CHAR32_T_LOCK_FREE", + (have_swap[SWAP_INDEX (char32_type_node)]? 2 : 1)); + builtin_define_with_int_value ("__GCC_ATOMIC_WCHAR_T_LOCK_FREE", + (have_swap[SWAP_INDEX (wchar_type_node)]? 2 : 1)); + builtin_define_with_int_value ("__GCC_ATOMIC_SHORT_LOCK_FREE", + (have_swap[SWAP_INDEX (short_integer_type_node)]? 2 : 1)); + builtin_define_with_int_value ("__GCC_ATOMIC_INT_LOCK_FREE", + (have_swap[SWAP_INDEX (integer_type_node)]? 2 : 1)); + builtin_define_with_int_value ("__GCC_ATOMIC_LONG_LOCK_FREE", + (have_swap[SWAP_INDEX (long_integer_type_node)]? 2 : 1)); + builtin_define_with_int_value ("__GCC_ATOMIC_LLONG_LOCK_FREE", + (have_swap[SWAP_INDEX (long_long_integer_type_node)]? 2 : 1)); + + /* ptr_type_node can't be used here since ptr_mode is only set when + toplev calls backend_init which is not done with -E or pch. */ + psize = POINTER_SIZE / BITS_PER_UNIT; + if (psize >= SWAP_LIMIT) + psize = 0; + builtin_define_with_int_value ("__GCC_ATOMIC_POINTER_LOCK_FREE", + (have_swap[psize]? 2 : 1)); +} + /* Hook that registers front end and target-specific built-ins. */ void c_cpp_builtins (cpp_reader *pfile) @@ -756,53 +867,8 @@ c_cpp_builtins (cpp_reader *pfile) if (c_dialect_cxx () && TYPE_UNSIGNED (wchar_type_node)) cpp_define (pfile, "__WCHAR_UNSIGNED__"); - /* Tell source code if the compiler makes sync_compare_and_swap - builtins available. */ -#ifndef HAVE_sync_compare_and_swapqi -#define HAVE_sync_compare_and_swapqi 0 -#endif -#ifndef HAVE_atomic_compare_and_swapqi -#define HAVE_atomic_compare_and_swapqi 0 -#endif - if (HAVE_sync_compare_and_swapqi || HAVE_atomic_compare_and_swapqi) - cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1"); - -#ifndef HAVE_sync_compare_and_swaphi -#define HAVE_sync_compare_and_swaphi 0 -#endif -#ifndef HAVE_atomic_compare_and_swaphi -#define HAVE_atomic_compare_and_swaphi 0 -#endif - if (HAVE_sync_compare_and_swaphi || HAVE_atomic_compare_and_swaphi) - cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2"); - -#ifndef HAVE_sync_compare_and_swapsi -#define HAVE_sync_compare_and_swapsi 0 -#endif -#ifndef HAVE_atomic_compare_and_swapsi -#define HAVE_atomic_compare_and_swapsi 0 -#endif - if (HAVE_sync_compare_and_swapsi || HAVE_atomic_compare_and_swapsi) - cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4"); - -#ifndef HAVE_sync_compare_and_swapdi -#define HAVE_sync_compare_and_swapdi 0 -#endif -#ifndef HAVE_atomic_compare_and_swapdi -#define HAVE_atomic_compare_and_swapdi 0 -#endif - if (HAVE_sync_compare_and_swapdi || HAVE_atomic_compare_and_swapdi) - cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8"); - -#ifndef HAVE_sync_compare_and_swapti -#define HAVE_sync_compare_and_swapti 0 -#endif -#ifndef HAVE_atomic_compare_and_swapti -#define HAVE_atomic_compare_and_swapti 0 -#endif - if (HAVE_sync_compare_and_swapti || HAVE_atomic_compare_and_swapti) - cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16"); - + cpp_atomic_builtins (pfile); + #ifdef DWARF2_UNWIND_INFO if (dwarf2out_do_cfi_asm ()) cpp_define (pfile, "__GCC_HAVE_DWARF2_CFI_ASM"); |