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-rw-r--r--erts/aclocal.m4437
1 files changed, 252 insertions, 185 deletions
diff --git a/erts/aclocal.m4 b/erts/aclocal.m4
index 7d9d099bba..27f643921e 100644
--- a/erts/aclocal.m4
+++ b/erts/aclocal.m4
@@ -682,6 +682,55 @@ AC_SUBST(ERTS_INTERNAL_X_LIBS)
])
+AC_DEFUN(ETHR_CHK_SYNC_OP,
+[
+ AC_MSG_CHECKING([for $3-bit $1()])
+ case "$2" in
+ "1") sync_call="$1(&var);";;
+ "2") sync_call="$1(&var, ($4) 0);";;
+ "3") sync_call="$1(&var, ($4) 0, ($4) 0);";;
+ esac
+ have_sync_op=no
+ AC_TRY_LINK([],
+ [
+ $4 res;
+ volatile $4 var;
+ res = $sync_call
+ ],
+ [have_sync_op=yes])
+ test $have_sync_op = yes && $5
+ AC_MSG_RESULT([$have_sync_op])
+])
+
+AC_DEFUN(ETHR_CHK_INTERLOCKED,
+[
+ ilckd="$1"
+ AC_MSG_CHECKING([for ${ilckd}()])
+ case "$2" in
+ "1") ilckd_call="${ilckd}(var);";;
+ "2") ilckd_call="${ilckd}(var, ($3) 0);";;
+ "3") ilckd_call="${ilckd}(var, ($3) 0, ($3) 0);";;
+ "4") ilckd_call="${ilckd}(var, ($3) 0, ($3) 0, arr);";;
+ esac
+ have_interlocked_op=no
+ AC_TRY_LINK(
+ [
+ #define WIN32_LEAN_AND_MEAN
+ #include <windows.h>
+ #include <intrin.h>
+ ],
+ [
+ volatile $3 *var;
+ volatile $3 arr[2];
+
+ $ilckd_call
+ return 0;
+ ],
+ [have_interlocked_op=yes])
+ test $have_interlocked_op = yes && $4
+ AC_MSG_RESULT([$have_interlocked_op])
+])
+
dnl ----------------------------------------------------------------------
dnl
dnl ERL_FIND_ETHR_LIB
@@ -753,121 +802,41 @@ case "$THR_LIB_NAME" in
AC_DEFINE(ETHR_WIN32_THREADS, 1, [Define if you have win32 threads])
- have_ilckd=no
- AC_MSG_CHECKING([for _InterlockedCompareExchange64()])
- AC_TRY_LINK([
- #define WIN32_LEAN_AND_MEAN
- #include <windows.h>
- ],
- [
- volatile __int64 *var;
- _InterlockedCompareExchange64(var, (__int64) 1, (__int64) 0);
- return 0;
- ],
- have_ilckd=yes)
- AC_MSG_RESULT([$have_ilckd])
- test $have_ilckd = yes && AC_DEFINE(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE64, 1, [Define if you have _InterlockedCompareExchange64()])
-
- AC_CHECK_SIZEOF(void *)
- case "$ac_cv_sizeof_void_p-$have_ilckd" in
- 8-no)
- ethr_have_native_atomics=no
- ethr_have_native_spinlock=no;;
- *)
- ethr_have_native_atomics=yes
- ethr_have_native_spinlock=yes;;
- esac
-
- have_ilckd=no
- AC_MSG_CHECKING([for _InterlockedDecrement64()])
- AC_TRY_LINK([
- #define WIN32_LEAN_AND_MEAN
- #include <windows.h>
- ],
- [
- volatile __int64 *var;
- _InterlockedDecrement64(var);
- return 0;
- ],
- have_ilckd=yes)
- AC_MSG_RESULT([$have_ilckd])
- test $have_ilckd = yes && AC_DEFINE(ETHR_HAVE__INTERLOCKEDDECREMENT64, 1, [Define if you have _InterlockedDecrement64()])
-
- have_ilckd=no
- AC_MSG_CHECKING([for _InterlockedIncrement64()])
- AC_TRY_LINK([
- #define WIN32_LEAN_AND_MEAN
- #include <windows.h>
- ],
- [
- volatile __int64 *var;
- _InterlockedIncrement64(var);
- return 0;
- ],
- have_ilckd=yes)
- AC_MSG_RESULT([$have_ilckd])
- test $have_ilckd = yes && AC_DEFINE(ETHR_HAVE__INTERLOCKEDINCREMENT64, 1, [Define if you have _InterlockedIncrement64()])
-
- have_ilckd=no
- AC_MSG_CHECKING([for _InterlockedExchangeAdd64()])
- AC_TRY_LINK([
- #define WIN32_LEAN_AND_MEAN
- #include <windows.h>
- ],
- [
- volatile __int64 *var;
- _InterlockedExchangeAdd64(var, (__int64) 1);
- return 0;
- ],
- have_ilckd=yes)
- AC_MSG_RESULT([$have_ilckd])
- test $have_ilckd = yes && AC_DEFINE(ETHR_HAVE__INTERLOCKEDEXCHANGEADD64, 1, [Define if you have _InterlockedExchangeAdd64()])
-
- have_ilckd=no
- AC_MSG_CHECKING([for _InterlockedExchange64()])
- AC_TRY_LINK([
- #define WIN32_LEAN_AND_MEAN
- #include <windows.h>
- ],
- [
- volatile __int64 *var;
- _InterlockedExchange64(var, (__int64) 1);
- return 0;
- ],
- have_ilckd=yes)
- AC_MSG_RESULT([$have_ilckd])
- test $have_ilckd = yes && AC_DEFINE(ETHR_HAVE__INTERLOCKEDEXCHANGE64, 1, [Define if you have _InterlockedExchange64()])
-
- have_ilckd=no
- AC_MSG_CHECKING([for _InterlockedAnd64()])
- AC_TRY_LINK([
- #define WIN32_LEAN_AND_MEAN
- #include <windows.h>
- ],
- [
- volatile __int64 *var;
- _InterlockedAnd64(var, (__int64) 1);
- return 0;
- ],
- have_ilckd=yes)
- AC_MSG_RESULT([$have_ilckd])
- test $have_ilckd = yes && AC_DEFINE(ETHR_HAVE__INTERLOCKEDAND64, 1, [Define if you have _InterlockedAnd64()])
-
- have_ilckd=no
- AC_MSG_CHECKING([for _InterlockedOr64()])
- AC_TRY_LINK([
- #define WIN32_LEAN_AND_MEAN
- #include <windows.h>
- ],
- [
- volatile __int64 *var;
- _InterlockedOr64(var, (__int64) 1);
- return 0;
- ],
- have_ilckd=yes)
- AC_MSG_RESULT([$have_ilckd])
- test $have_ilckd = yes && AC_DEFINE(ETHR_HAVE__INTERLOCKEDOR64, 1, [Define if you have _InterlockedOr64()])
-
+ ETHR_CHK_INTERLOCKED([_InterlockedDecrement], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT, 1, [Define if you have _InterlockedDecrement()]))
+ ETHR_CHK_INTERLOCKED([_InterlockedDecrement_rel], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT_REL, 1, [Define if you have _InterlockedDecrement_rel()]))
+ ETHR_CHK_INTERLOCKED([_InterlockedIncrement], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT, 1, [Define if you have _InterlockedIncrement()]))
+ ETHR_CHK_INTERLOCKED([_InterlockedIncrement_acq], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT_ACQ, 1, [Define if you have _InterlockedIncrement_acq()]))
+ ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD, 1, [Define if you have _InterlockedExchangeAdd()]))
+ ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd_acq], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD_ACQ, 1, [Define if you have _InterlockedExchangeAdd_acq()]))
+ ETHR_CHK_INTERLOCKED([_InterlockedAnd], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDAND, 1, [Define if you have _InterlockedAnd()]))
+ ETHR_CHK_INTERLOCKED([_InterlockedOr], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDOR, 1, [Define if you have _InterlockedOr()]))
+ ETHR_CHK_INTERLOCKED([_InterlockedExchange], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGE, 1, [Define if you have _InterlockedExchange()]))
+ ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange], [3], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE, 1, [Define if you have _InterlockedCompareExchange()]))
+ test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes
+ ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange_acq], [3], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE_ACQ, 1, [Define if you have _InterlockedCompareExchange_acq()]))
+ test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes
+ ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange_rel], [3], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE_REL, 1, [Define if you have _InterlockedCompareExchange_rel()]))
+ test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes
+
+ ETHR_CHK_INTERLOCKED([_InterlockedDecrement64], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT64, 1, [Define if you have _InterlockedDecrement64()]))
+ ETHR_CHK_INTERLOCKED([_InterlockedDecrement64_rel], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT64_REL, 1, [Define if you have _InterlockedDecrement64_rel()]))
+ ETHR_CHK_INTERLOCKED([_InterlockedIncrement64], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT64, 1, [Define if you have _InterlockedIncrement64()]))
+ ETHR_CHK_INTERLOCKED([_InterlockedIncrement64_acq], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT64_ACQ, 1, [Define if you have _InterlockedIncrement64_acq()]))
+ ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD64, 1, [Define if you have _InterlockedExchangeAdd64()]))
+ ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd64_acq], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD64_ACQ, 1, [Define if you have _InterlockedExchangeAdd64_acq()]))
+ ETHR_CHK_INTERLOCKED([_InterlockedAnd64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDAND64, 1, [Define if you have _InterlockedAnd64()]))
+ ETHR_CHK_INTERLOCKED([_InterlockedOr64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDOR64, 1, [Define if you have _InterlockedOr64()]))
+ ETHR_CHK_INTERLOCKED([_InterlockedExchange64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGE64, 1, [Define if you have _InterlockedExchange64()]))
+ ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange64], [3], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE64, 1, [Define if you have _InterlockedCompareExchange64()]))
+ test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes
+ ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange64_acq], [3], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE64_ACQ, 1, [Define if you have _InterlockedCompareExchange64_acq()]))
+ test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes
+ ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange64_rel], [3], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE64_REL, 1, [Define if you have _InterlockedCompareExchange64_rel()]))
+ test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes
+
+ ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange128], [4], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE128, 1, [Define if you have _InterlockedCompareExchange128()]))
+
+ test "$ethr_have_native_atomics" = "yes" && ethr_have_native_spinlock=yes
;;
pthread)
@@ -1103,35 +1072,51 @@ case "$THR_LIB_NAME" in
AC_MSG_RESULT([$linux_futex])
test $linux_futex = yes && AC_DEFINE(ETHR_HAVE_LINUX_FUTEX, 1, [Define if you have a linux futex implementation.])
- AC_MSG_CHECKING([for GCC atomic operations])
- ethr_have_gcc_atomic_ops=no
- AC_TRY_LINK([],
- [
- long res;
- volatile long val;
- res = __sync_val_compare_and_swap(&val, (long) 1, (long) 0);
- res = __sync_add_and_fetch(&val, (long) 1);
- res = __sync_sub_and_fetch(&val, (long) 1);
- res = __sync_fetch_and_and(&val, (long) 1);
- res = __sync_fetch_and_or(&val, (long) 1);
- ],
- [ethr_have_native_atomics=yes
- ethr_have_gcc_atomic_ops=yes])
- AC_MSG_RESULT([$ethr_have_gcc_atomic_ops])
- test $ethr_have_gcc_atomic_ops = yes && AC_DEFINE(ETHR_HAVE_GCC_ATOMIC_OPS, 1, [Define if you have gcc atomic operations])
+ AC_CHECK_SIZEOF(int)
+ AC_CHECK_SIZEOF(long)
+ AC_CHECK_SIZEOF(long long)
+ AC_CHECK_SIZEOF(__int128_t)
+
+ if test "$ac_cv_sizeof_int" = "4"; then
+ int32="int"
+ elif test "$ac_cv_sizeof_long" = "4"; then
+ int32="long"
+ elif test "$ac_cv_sizeof_long_long" = "4"; then
+ int32="long long"
+ else
+ AC_MSG_ERROR([No 32-bit type found])
+ fi
- case "$host_cpu" in
- sun4u | sparc64 | sun4v)
- ethr_have_native_atomics=yes;;
- i86pc | i*86 | x86_64 | amd64)
- ethr_have_native_atomics=yes;;
- macppc | ppc | "Power Macintosh")
- ethr_have_native_atomics=yes;;
- tile)
- ethr_have_native_atomics=yes;;
- *)
- ;;
- esac
+ if test "$ac_cv_sizeof_int" = "8"; then
+ int64="int"
+ elif test "$ac_cv_sizeof_long" = "8"; then
+ int64="long"
+ elif test "$ac_cv_sizeof_long_long" = "8"; then
+ int64="long long"
+ else
+ AC_MSG_ERROR([No 64-bit type found])
+ fi
+
+ int128=no
+ if test "$ac_cv_sizeof___int128_t" = "16"; then
+ int128="__int128_t"
+ fi
+
+ ETHR_CHK_SYNC_OP([__sync_val_compare_and_swap], [3], [32], [$int32], AC_DEFINE(ETHR_HAVE___SYNC_VAL_COMPARE_AND_SWAP32, 1, [Define if you have __sync_val_compare_and_swap() for 32-bit integers]))
+ test "$have_sync_op" = "yes" && ethr_have_native_atomics=yes
+ ETHR_CHK_SYNC_OP([__sync_add_and_fetch], [2], [32], [$int32], AC_DEFINE(ETHR_HAVE___SYNC_ADD_AND_FETCH32, 1, [Define if you have __sync_add_and_fetch() for 32-bit integers]))
+ ETHR_CHK_SYNC_OP([__sync_fetch_and_and], [2], [32], [$int32], AC_DEFINE(ETHR_HAVE___SYNC_FETCH_AND_AND32, 1, [Define if you have __sync_fetch_and_and() for 32-bit integers]))
+ ETHR_CHK_SYNC_OP([__sync_fetch_and_or], [2], [32], [$int32], AC_DEFINE(ETHR_HAVE___SYNC_FETCH_AND_OR32, 1, [Define if you have __sync_fetch_and_or() for 32-bit integers]))
+
+ ETHR_CHK_SYNC_OP([__sync_val_compare_and_swap], [3], [64], [$int64], AC_DEFINE(ETHR_HAVE___SYNC_VAL_COMPARE_AND_SWAP64, 1, [Define if you have __sync_val_compare_and_swap() for 64-bit integers]))
+ test "$have_sync_op" = "yes" && ethr_have_native_atomics=yes
+ ETHR_CHK_SYNC_OP([__sync_add_and_fetch], [2], [64], [$int64], AC_DEFINE(ETHR_HAVE___SYNC_ADD_AND_FETCH64, 1, [Define if you have __sync_add_and_fetch() for 64-bit integers]))
+ ETHR_CHK_SYNC_OP([__sync_fetch_and_and], [2], [64], [$int64], AC_DEFINE(ETHR_HAVE___SYNC_FETCH_AND_AND64, 1, [Define if you have __sync_fetch_and_and() for 64-bit integers]))
+ ETHR_CHK_SYNC_OP([__sync_fetch_and_or], [2], [64], [$int64], AC_DEFINE(ETHR_HAVE___SYNC_FETCH_AND_OR64, 1, [Define if you have __sync_fetch_and_or() for 64-bit integers]))
+
+ if test $int128 != no; then
+ ETHR_CHK_SYNC_OP([__sync_val_compare_and_swap], [3], [128], [$int128], AC_DEFINE(ETHR_HAVE___SYNC_VAL_COMPARE_AND_SWAP128, 1, [Define if you have __sync_val_compare_and_swap() for 128-bit integers]))
+ fi
AC_MSG_CHECKING([for a usable libatomic_ops implementation])
case "x$with_libatomic_ops" in
@@ -1178,6 +1163,34 @@ case "$THR_LIB_NAME" in
AC_MSG_ERROR([No usable libatomic_ops implementation found])
fi
+ case "$host_cpu" in
+ sparc | sun4u | sparc64 | sun4v)
+ case "$with_sparc_memory_order" in
+ "TSO")
+ AC_DEFINE(ETHR_SPARC_TSO, 1, [Define if only run in Sparc TSO mode]);;
+ "PSO")
+ AC_DEFINE(ETHR_SPARC_PSO, 1, [Define if only run in Sparc PSO, or TSO mode]);;
+ "RMO"|"")
+ AC_DEFINE(ETHR_SPARC_RMO, 1, [Define if run in Sparc RMO, PSO, or TSO mode]);;
+ *)
+ AC_MSG_ERROR([Unsupported Sparc memory order: $with_sparc_memory_order]);;
+ esac
+ ethr_have_native_atomics=yes;;
+ i86pc | i*86 | x86_64 | amd64)
+ if test "$enable_x86_out_of_order" = "yes"; then
+ AC_DEFINE(ETHR_X86_OUT_OF_ORDER, 1, [Define if x86/x86_64 out of order instructions should be synchronized])
+ fi
+ ethr_have_native_atomics=yes;;
+ macppc | ppc | "Power Macintosh")
+ ethr_have_native_atomics=yes;;
+ tile)
+ ethr_have_native_atomics=yes;;
+ *)
+ ;;
+ esac
+
+ test ethr_have_native_atomics = "yes" && ethr_have_native_spinlock=yes
+
dnl Restore LIBS
LIBS=$saved_libs
dnl restore CPPFLAGS
@@ -1213,6 +1226,8 @@ AC_CHECK_SIZEOF(long long)
AC_DEFINE_UNQUOTED(ETHR_SIZEOF_LONG_LONG, $ac_cv_sizeof_long_long, [Define to the size of long long])
AC_CHECK_SIZEOF(__int64)
AC_DEFINE_UNQUOTED(ETHR_SIZEOF___INT64, $ac_cv_sizeof___int64, [Define to the size of __int64])
+AC_CHECK_SIZEOF(__int128_t)
+AC_DEFINE_UNQUOTED(ETHR_SIZEOF___INT128_T, $ac_cv_sizeof___int128_t, [Define to the size of __int128_t])
case X$erl_xcomp_bigendian in
@@ -1235,6 +1250,10 @@ AC_ARG_ENABLE(native-ethr-impls,
*) disable_native_ethr_impls=no ;;
esac ], disable_native_ethr_impls=no)
+AC_ARG_ENABLE(x86-out-of-order,
+ AS_HELP_STRING([--enable-x86-out-of-order],
+ [enable x86/x84_64 out of order support (default disabled)]))
+
test "X$disable_native_ethr_impls" = "Xyes" &&
AC_DEFINE(ETHR_DISABLE_NATIVE_IMPLS, 1, [Define if you want to disable native ethread implementations])
@@ -1253,49 +1272,96 @@ AC_ARG_WITH(libatomic_ops,
AS_HELP_STRING([--with-libatomic_ops=PATH],
[specify and prefer usage of libatomic_ops in the ethread library]))
-AC_ARG_ENABLE(ethread-pre-pentium4-compatibility,
- AS_HELP_STRING([--enable-ethread-pre-pentium4-compatibility],
- [enable compatibility with x86 processors before pentium 4 (back to 486) in the ethread library]),
-[
- case "$enable_ethread_pre_pentium4_compatibility" in
- yes|no) ;;
- *) enable_ethread_pre_pentium4_compatibility=check;;
- esac
-],
-[enable_ethread_pre_pentium4_compatibility=check])
-
-test "$cross_compiling" != "yes" || enable_ethread_pre_pentium4_compatibility=no
-
-case "$enable_ethread_pre_pentium4_compatibility-$host_cpu" in
- check-i86pc | check-i*86)
- AC_MSG_CHECKING([whether pre pentium 4 compatibility should forced])
- AC_RUN_IFELSE([
-#if defined(__GNUC__)
-# if defined(ETHR_PREFER_LIBATOMIC_OPS_NATIVE_IMPLS)
-# define CHECK_LIBATOMIC_OPS__
-# else
-# define CHECK_GCC_ASM__
-# endif
-#elif defined(ETHR_HAVE_LIBATOMIC_OPS)
-# define CHECK_LIBATOMIC_OPS__
+AC_ARG_WITH(with_sparc_memory_order,
+ AS_HELP_STRING([--with-sparc-memory-order=TSO|PSO|RMO],
+ [specify sparc memory order (defaults to RMO)]))
+
+ETHR_X86_SSE2_ASM=no
+case "$GCC-$ac_cv_sizeof_void_p-$host_cpu" in
+ yes-4-i86pc | yes-4-i*86 | yes-4-x86_64 | yes-4-amd64)
+ AC_MSG_CHECKING([for gcc sse2 asm support])
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -msse2"
+ gcc_sse2_asm=no
+ AC_TRY_COMPILE([],
+ [
+ long long x, *y;
+ __asm__ __volatile__("movq %1, %0\n\t" : "=x"(x) : "m"(*y) : "memory");
+ ],
+ [gcc_sse2_asm=yes])
+ CFLAGS="$save_CFLAGS"
+ AC_MSG_RESULT([$gcc_sse2_asm])
+ if test "$gcc_sse2_asm" = "yes"; then
+ AC_DEFINE(ETHR_GCC_HAVE_SSE2_ASM_SUPPORT, 1, [Define if you use a gcc that supports -msse2 and understand sse2 specific asm statements])
+ ETHR_X86_SSE2_ASM=yes
+ fi
+ ;;
+ *)
+ ;;
+esac
+
+case "$GCC-$host_cpu" in
+ yes-i86pc | yes-i*86 | yes-x86_64 | yes-amd64)
+ gcc_dw_cmpxchg_asm=no
+ AC_MSG_CHECKING([for gcc double word cmpxchg asm support])
+ AC_TRY_COMPILE([],
+ [
+ char xchgd;
+ long new[2], xchg[2], *p;
+ __asm__ __volatile__(
+#if ETHR_SIZEOF_PTR == 4 && defined(__PIC__) && __PIC__
+ "pushl %%ebx\n\t"
+ "movl %8, %%ebx\n\t"
#endif
-#if defined(CHECK_LIBATOMIC_OPS__)
-#include "atomic_ops.h"
+#if ETHR_SIZEOF_PTR == 4
+ "lock; cmpxchg8b %0\n\t"
+#else
+ "lock; cmpxchg16b %0\n\t"
#endif
-int main(void)
-{
-#if defined(CHECK_GCC_ASM__)
- __asm__ __volatile__("mfence" : : : "memory");
-#elif defined(CHECK_LIBATOMIC_OPS__)
- AO_nop_full();
+ "setz %3\n\t"
+#if ETHR_SIZEOF_PTR == 4 && defined(__PIC__) && __PIC__
+ "popl %%ebx\n\t"
#endif
- return 0;
-}
+ : "=m"(*p), "=d"(xchg[1]), "=a"(xchg[0]), "=c"(xchgd)
+ : "m"(*p), "1"(xchg[1]), "2"(xchg[0]), "3"(new[1]),
+#if ETHR_SIZEOF_PTR == 4 && defined(__PIC__) && __PIC__
+ "r"(new[0])
+#else
+ "b"(new[0])
+#endif
+ : "cc", "memory");
+
],
- [enable_ethread_pre_pentium4_compatibility=no],
- [enable_ethread_pre_pentium4_compatibility=yes],
- [enable_ethread_pre_pentium4_compatibility=no])
- AC_MSG_RESULT([$enable_ethread_pre_pentium4_compatibility]);;
+ [gcc_dw_cmpxchg_asm=yes])
+ if test $gcc_dw_cmpxchg_asm = no && test $ac_cv_sizeof_void_p = 4; then
+ AC_TRY_COMPILE([],
+ [
+ char xchgd;
+ long new[2], xchg[2], *p;
+#if !defined(__PIC__) || !__PIC__
+# error nope
+#endif
+ __asm__ __volatile__(
+ "pushl %%ebx\n\t"
+ "movl (%7), %%ebx\n\t"
+ "movl 4(%7), %%ecx\n\t"
+ "lock; cmpxchg8b %0\n\t"
+ "setz %3\n\t"
+ "popl %%ebx\n\t"
+ : "=m"(*p), "=d"(xchg[1]), "=a"(xchg[0]), "=c"(xchgd)
+ : "m"(*p), "1"(xchg[1]), "2"(xchg[0]), "3"(new)
+ : "cc", "memory");
+
+ ],
+ [gcc_dw_cmpxchg_asm=yes])
+ if test "$gcc_dw_cmpxchg_asm" = "yes"; then
+ AC_DEFINE(ETHR_CMPXCHG8B_REGISTER_SHORTAGE, 1, [Define if you get a register shortage with cmpxchg8b and position independent code])
+ fi
+ fi
+ AC_MSG_RESULT([$gcc_dw_cmpxchg_asm])
+ if test "$gcc_dw_cmpxchg_asm" = "yes"; then
+ AC_DEFINE(ETHR_GCC_HAVE_DW_CMPXCHG_ASM_SUPPORT, 1, [Define if you use a gcc that supports the double word cmpxchg instruction])
+ fi;;
*)
;;
esac
@@ -1312,6 +1378,7 @@ AC_SUBST(ETHR_LIB_NAME)
AC_SUBST(ETHR_DEFS)
AC_SUBST(ETHR_THR_LIB_BASE)
AC_SUBST(ETHR_THR_LIB_BASE_DIR)
+AC_SUBST(ETHR_X86_SSE2_ASM)
])
@@ -1582,11 +1649,11 @@ dnl Freely inspired by AC_TRY_LINK. (Maybe better to create a
dnl AC_LANG_JAVA instead...)
AC_DEFUN(ERL_TRY_LINK_JAVA,
[java_link='$JAVAC conftest.java 1>&AC_FD_CC'
-changequote(�, �)dnl
+changequote(, )dnl
cat > conftest.java <<EOF
-�$1�
+$1
class conftest { public static void main(String[] args) {
- �$2�
+ $2
; return; }}
EOF
changequote([, ])dnl