dnl dnl Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana dnl University Research and Technology dnl Corporation. All rights reserved. dnl Copyright (c) 2004-2020 The University of Tennessee and The University dnl of Tennessee Research Foundation. All rights dnl reserved. dnl Copyright (c) 2004-2006 High Performance Computing Center Stuttgart, dnl University of Stuttgart. All rights reserved. dnl Copyright (c) 2004-2005 The Regents of the University of California. dnl All rights reserved. dnl Copyright (c) 2008-2018 Cisco Systems, Inc. All rights reserved. dnl Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved. dnl Copyright (c) 2015-2017 Research Organization for Information Science dnl and Technology (RIST). All rights reserved. dnl Copyright (c) 2014-2017 Los Alamos National Security, LLC. All rights dnl reserved. dnl Copyright (c) 2017 Amazon.com, Inc. or its affiliates. All Rights dnl reserved. dnl $COPYRIGHT$ dnl dnl Additional copyrights may follow dnl dnl $HEADER$ dnl dnl This is a C test to see if 128-bit __atomic_compare_exchange_n() dnl actually works (e.g., it compiles and links successfully on dnl ARM64+clang, but returns incorrect answers as of August 2018). AC_DEFUN([OPAL_ATOMIC_COMPARE_EXCHANGE_N_TEST_SOURCE],[[ #include #include #include typedef union { uint64_t fake@<:@2@:>@; __int128 real; } ompi128; static void test1(void) { // As of Aug 2018, we could not figure out a way to assign 128-bit // constants -- the compilers would not accept it. So use a fake // union to assign 2 uin64_t's to make a single __int128. ompi128 ptr = { .fake = { 0xFFEEDDCCBBAA0099, 0x8877665544332211 }}; ompi128 expected = { .fake = { 0x11EEDDCCBBAA0099, 0x88776655443322FF }}; ompi128 desired = { .fake = { 0x1122DDCCBBAA0099, 0x887766554433EEFF }}; bool r = __atomic_compare_exchange_n(&ptr.real, &expected.real, desired.real, true, __ATOMIC_RELAXED, __ATOMIC_RELAXED); if ( !(r == false && ptr.real == expected.real)) { exit(1); } } static void test2(void) { ompi128 ptr = { .fake = { 0xFFEEDDCCBBAA0099, 0x8877665544332211 }}; ompi128 expected = ptr; ompi128 desired = { .fake = { 0x1122DDCCBBAA0099, 0x887766554433EEFF }}; bool r = __atomic_compare_exchange_n(&ptr.real, &expected.real, desired.real, true, __ATOMIC_RELAXED, __ATOMIC_RELAXED); if (!(r == true && ptr.real == desired.real)) { exit(2); } } int main(int argc, char** argv) { test1(); test2(); return 0; } ]]) dnl ------------------------------------------------------------------ dnl This is a C test to see if 128-bit __sync_bool_compare_and_swap() dnl actually works (e.g., it compiles and links successfully on dnl ARM64+clang, but returns incorrect answers as of August 2018). AC_DEFUN([OPAL_SYNC_BOOL_COMPARE_AND_SWAP_TEST_SOURCE],[[ #include #include #include typedef union { uint64_t fake@<:@2@:>@; __int128 real; } ompi128; static void test1(void) { // As of Aug 2018, we could not figure out a way to assign 128-bit // constants -- the compilers would not accept it. So use a fake // union to assign 2 uin64_t's to make a single __int128. ompi128 ptr = { .fake = { 0xFFEEDDCCBBAA0099, 0x8877665544332211 }}; ompi128 oldval = { .fake = { 0x11EEDDCCBBAA0099, 0x88776655443322FF }}; ompi128 newval = { .fake = { 0x1122DDCCBBAA0099, 0x887766554433EEFF }}; bool r = __sync_bool_compare_and_swap(&ptr.real, oldval.real, newval.real); if (!(r == false && ptr.real != newval.real)) { exit(1); } } static void test2(void) { ompi128 ptr = { .fake = { 0xFFEEDDCCBBAA0099, 0x8877665544332211 }}; ompi128 oldval = ptr; ompi128 newval = { .fake = { 0x1122DDCCBBAA0099, 0x887766554433EEFF }}; bool r = __sync_bool_compare_and_swap(&ptr.real, oldval.real, newval.real); if (!(r == true && ptr.real == newval.real)) { exit(2); } } int main(int argc, char** argv) { test1(); test2(); return 0; } ]]) dnl ------------------------------------------------------------------ dnl dnl Check to see if a specific function is linkable. dnl dnl Check with: dnl 1. No compiler/linker flags. dnl 2. CFLAGS += -mcx16 dnl 3. LIBS += -latomic dnl 4. Finally, if it links ok with any of #1, #2, or #3, actually try dnl to run the test code (if we're not cross-compiling) and verify dnl that it actually gives us the correct result. dnl dnl Note that we unfortunately can't use AC SEARCH_LIBS because its dnl check incorrectly fails (because these functions are special compiler dnl intrinsics -- SEARCH_LIBS tries with "check FUNC()", which the dnl compiler complains doesn't match the internal prototype). So we have dnl to use our own LINK_IFELSE tests. Indeed, since these functions are dnl so special, we actually need a valid source code that calls the dnl functions with correct arguments, etc. It's not enough, for example, dnl to do the usual "try to set a function pointer to the symbol" trick to dnl determine if these functions are available, because the compiler may dnl not implement these as actual symbols. So just try to link a real dnl test code. dnl dnl $1: function name to print dnl $2: program to test dnl $3: action if any of 1, 2, or 3 succeeds dnl #4: action if all of 1, 2, and 3 fail dnl AC_DEFUN([OPAL_ASM_CHECK_ATOMIC_FUNC],[ OPAL_VAR_SCOPE_PUSH([opal_asm_check_func_happy opal_asm_check_func_CFLAGS_save opal_asm_check_func_LIBS_save]) opal_asm_check_func_CFLAGS_save=$CFLAGS opal_asm_check_func_LIBS_save=$LIBS dnl Check with no compiler/linker flags AC_MSG_CHECKING([for $1]) AC_LINK_IFELSE([$2], [opal_asm_check_func_happy=1 AC_MSG_RESULT([yes])], [opal_asm_check_func_happy=0 AC_MSG_RESULT([no])]) dnl If that didn't work, try again with CFLAGS+=mcx16 AS_IF([test $opal_asm_check_func_happy -eq 0], [AC_MSG_CHECKING([for $1 with -mcx16]) CFLAGS="$CFLAGS -mcx16" AC_LINK_IFELSE([$2], [opal_asm_check_func_happy=1 AC_MSG_RESULT([yes])], [opal_asm_check_func_happy=0 CFLAGS=$opal_asm_check_func_CFLAGS_save AC_MSG_RESULT([no])]) ]) dnl If that didn't work, try again with LIBS+=-latomic AS_IF([test $opal_asm_check_func_happy -eq 0], [AC_MSG_CHECKING([for $1 with -latomic]) LIBS="$LIBS -latomic" AC_LINK_IFELSE([$2], [opal_asm_check_func_happy=1 AC_MSG_RESULT([yes])], [opal_asm_check_func_happy=0 LIBS=$opal_asm_check_func_LIBS_save AC_MSG_RESULT([no])]) ]) dnl If we have it, try it and make sure it gives a correct result. dnl As of Aug 2018, we know that it links but does *not* work on clang dnl 6 on ARM64. AS_IF([test $opal_asm_check_func_happy -eq 1], [AC_MSG_CHECKING([if $1() gives correct results]) AC_RUN_IFELSE([$2], [AC_MSG_RESULT([yes])], [opal_asm_check_func_happy=0 AC_MSG_RESULT([no])], [AC_MSG_RESULT([cannot test -- assume yes (cross compiling)])]) ]) dnl If we were unsuccessful, restore CFLAGS/LIBS AS_IF([test $opal_asm_check_func_happy -eq 0], [CFLAGS=$opal_asm_check_func_CFLAGS_save LIBS=$opal_asm_check_func_LIBS_save]) dnl Run the user actions AS_IF([test $opal_asm_check_func_happy -eq 1], [$3], [$4]) OPAL_VAR_SCOPE_POP ]) dnl ------------------------------------------------------------------ AC_DEFUN([OPAL_CHECK_SYNC_BUILTIN_CSWAP_INT128], [ OPAL_VAR_SCOPE_PUSH([sync_bool_compare_and_swap_128_result]) # Do we have __sync_bool_compare_and_swap? # Use a special macro because we need to check with a few different # CFLAGS/LIBS. OPAL_ASM_CHECK_ATOMIC_FUNC([__sync_bool_compare_and_swap], [AC_LANG_SOURCE(OPAL_SYNC_BOOL_COMPARE_AND_SWAP_TEST_SOURCE)], [sync_bool_compare_and_swap_128_result=1], [sync_bool_compare_and_swap_128_result=0]) AC_DEFINE_UNQUOTED([OPAL_HAVE_SYNC_BUILTIN_CSWAP_INT128], [$sync_bool_compare_and_swap_128_result], [Whether the __sync builtin atomic compare and swap supports 128-bit values]) OPAL_VAR_SCOPE_POP ]) AC_DEFUN([OPAL_CHECK_SYNC_BUILTINS], [ AC_MSG_CHECKING([for __sync builtin atomics]) AC_TRY_LINK([long tmp;], [__sync_synchronize(); __sync_bool_compare_and_swap(&tmp, 0, 1); __sync_add_and_fetch(&tmp, 1);], [AC_MSG_RESULT([yes]) $1], [AC_MSG_RESULT([no]) $2]) AC_MSG_CHECKING([for 64-bit __sync builtin atomics]) AC_TRY_LINK([ #include uint64_t tmp;], [ __sync_bool_compare_and_swap(&tmp, 0, 1); __sync_add_and_fetch(&tmp, 1);], [AC_MSG_RESULT([yes]) opal_asm_sync_have_64bit=1], [AC_MSG_RESULT([no]) opal_asm_sync_have_64bit=0]) AC_DEFINE_UNQUOTED([OPAL_ASM_SYNC_HAVE_64BIT],[$opal_asm_sync_have_64bit], [Whether 64-bit is supported by the __sync builtin atomics]) # Check for 128-bit support OPAL_CHECK_SYNC_BUILTIN_CSWAP_INT128 ]) AC_DEFUN([OPAL_CHECK_GCC_BUILTIN_CSWAP_INT128], [ OPAL_VAR_SCOPE_PUSH([atomic_compare_exchange_n_128_result atomic_compare_exchange_n_128_CFLAGS_save atomic_compare_exchange_n_128_LIBS_save]) atomic_compare_exchange_n_128_CFLAGS_save=$CFLAGS atomic_compare_exchange_n_128_LIBS_save=$LIBS # Do we have __sync_bool_compare_and_swap? # Use a special macro because we need to check with a few different # CFLAGS/LIBS. OPAL_ASM_CHECK_ATOMIC_FUNC([__atomic_compare_exchange_n], [AC_LANG_SOURCE(OPAL_ATOMIC_COMPARE_EXCHANGE_N_TEST_SOURCE)], [atomic_compare_exchange_n_128_result=1], [atomic_compare_exchange_n_128_result=0]) # If we have it and it works, check to make sure it is always lock # free. AS_IF([test $atomic_compare_exchange_n_128_result -eq 1], [AC_MSG_CHECKING([if __int128 atomic compare-and-swap is always lock-free]) AC_RUN_IFELSE([AC_LANG_PROGRAM([], [if (!__atomic_always_lock_free(16, 0)) { return 1; }])], [AC_MSG_RESULT([yes])], [atomic_compare_exchange_n_128_result=0 # If this test fails, need to reset CFLAGS/LIBS (the # above tests atomically set CFLAGS/LIBS or not; this # test is running after the fact, so we have to undo # the side-effects of setting CFLAGS/LIBS if the above # tests passed). CFLAGS=$atomic_compare_exchange_n_128_CFLAGS_save LIBS=$atomic_compare_exchange_n_128_LIBS_save AC_MSG_RESULT([no])], [AC_MSG_RESULT([cannot test -- assume yes (cross compiling)])]) ]) AC_DEFINE_UNQUOTED([OPAL_HAVE_GCC_BUILTIN_CSWAP_INT128], [$atomic_compare_exchange_n_128_result], [Whether the __atomic builtin atomic compare swap is both supported and lock-free on 128-bit values]) dnl If we could not find decent support for 128-bits __atomic let's dnl try the GCC _sync AS_IF([test $atomic_compare_exchange_n_128_result -eq 0], [OPAL_CHECK_SYNC_BUILTIN_CSWAP_INT128]) OPAL_VAR_SCOPE_POP ]) AC_DEFUN([OPAL_CHECK_GCC_ATOMIC_BUILTINS], [ AC_MSG_CHECKING([for __atomic builtin atomics]) AC_TRY_LINK([ #include uint32_t tmp, old = 0; uint64_t tmp64, old64 = 0;], [ __atomic_thread_fence(__ATOMIC_SEQ_CST); __atomic_compare_exchange_n(&tmp, &old, 1, 0, __ATOMIC_RELAXED, __ATOMIC_RELAXED); __atomic_add_fetch(&tmp, 1, __ATOMIC_RELAXED); __atomic_compare_exchange_n(&tmp64, &old64, 1, 0, __ATOMIC_RELAXED, __ATOMIC_RELAXED); __atomic_add_fetch(&tmp64, 1, __ATOMIC_RELAXED);], [AC_MSG_RESULT([yes]) $1], [AC_MSG_RESULT([no]) $2]) # Check for 128-bit support OPAL_CHECK_GCC_BUILTIN_CSWAP_INT128 ]) dnl ################################################################# dnl dnl OPAL_CHECK_ASM_TEXT dnl dnl Determine how to set current mode as text. dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_ASM_TEXT],[ AC_MSG_CHECKING([directive for setting text section]) opal_cv_asm_text="" if test "$opal_cv_c_compiler_vendor" = "microsoft" ; then # text section will be brought in with the rest of # header for MS - leave blank for now opal_cv_asm_text="" else case $host in *-aix*) opal_cv_asm_text=[".csect .text[PR]"] ;; *) opal_cv_asm_text=".text" ;; esac fi AC_MSG_RESULT([$opal_cv_asm_text]) AC_DEFINE_UNQUOTED([OPAL_ASM_TEXT], ["$opal_cv_asm_text"], [Assembly directive for setting text section]) OPAL_ASM_TEXT="$opal_cv_asm_text" AC_SUBST(OPAL_ASM_TEXT) ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_ASM_GLOBAL dnl dnl Sets OPAL_ASM_GLOBAL to the value to prefix global values dnl dnl I'm sure if I don't have a test for this, there will be some dnl dumb platform that uses something else dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_ASM_GLOBAL],[ AC_MSG_CHECKING([directive for exporting symbols]) opal_cv_asm_global="" if test "$opal_cv_c_compiler_vendor" = "microsoft" ; then opal_cv_asm_global="PUBLIC" else case $host in *) opal_cv_asm_global=".globl" ;; esac fi AC_MSG_RESULT([$opal_cv_asm_global]) AC_DEFINE_UNQUOTED([OPAL_ASM_GLOBAL], ["$opal_cv_asm_global"], [Assembly directive for exporting symbols]) OPAL_ASM_GLOBAL="$opal_cv_asm_global" AC_SUBST(OPAL_AS_GLOBAL) ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_ASM_LSYM dnl dnl Sets OPAL_ASM_LSYM to the prefix value on a symbol to make it dnl an internal label (jump target and whatnot) dnl dnl We look for L .L $ L$ (in that order) for something that both dnl assembles and does not leave a label in the output of nm. Fall dnl back to L if nothing else seems to work :/ dnl dnl ################################################################# # _OPAL_CHECK_ASM_LSYM([variable-to-set]) # --------------------------------------- AC_DEFUN([_OPAL_CHECK_ASM_LSYM],[ AC_REQUIRE([AC_PROG_GREP]) $1="L" for sym in L .L $ L$ ; do asm_result=0 echo "configure: trying $sym" >&AC_FD_CC OPAL_TRY_ASSEMBLE([foobar$opal_cv_asm_label_suffix ${sym}mytestlabel$opal_cv_asm_label_suffix], [# ok, we succeeded at assembling. see if we can nm, # throwing the results in a file if $NM conftest.$OBJEXT > conftest.out 2>&AC_FD_CC ; then if test "`$GREP mytestlabel conftest.out`" = "" ; then # there was no symbol... looks promising to me $1="$sym" asm_result=1 elif test ["`$GREP ' [Nt] .*mytestlabel' conftest.out`"] = "" ; then # see if we have a non-global-ish symbol # but we should see if we can do better. $1="$sym" fi else # not so much on the NM goodness :/ echo "$NM failed. Output from NM was:" >&AC_FD_CC cat conftest.out >&AC_FD_CC AC_MSG_WARN([$NM could not read object file]) fi ]) if test "$asm_result" = "1" ; then break fi done rm -f conftest.out unset asm_result sym ]) # OPAL_CHECK_ASM_LSYM() # --------------------- AC_DEFUN([OPAL_CHECK_ASM_LSYM],[ AC_REQUIRE([AC_PROG_NM]) AC_CACHE_CHECK([prefix for lsym labels], [opal_cv_asm_lsym], [_OPAL_CHECK_ASM_LSYM([opal_cv_asm_lsym])]) AC_DEFINE_UNQUOTED([OPAL_ASM_LSYM], ["$opal_cv_asm_lsym"], [Assembly prefix for lsym labels]) OPAL_ASM_LSYM="$opal_cv_asm_lsym" AC_SUBST(OPAL_ASM_LSYM) ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_ASM_PROC dnl dnl Sets a cv-flag, if the compiler needs a proc/endp-definition to dnl link with C. dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_ASM_PROC],[ AC_CACHE_CHECK([if .proc/endp is needed], [opal_cv_asm_need_proc], [opal_cv_asm_need_proc="no" OPAL_TRY_ASSEMBLE([ .proc mysym mysym: .endp mysym], [opal_cv_asm_need_proc="yes"]) rm -f conftest.out]) if test "$opal_cv_asm_need_proc" = "yes" ; then opal_cv_asm_proc=".proc" opal_cv_asm_endproc=".endp" else opal_cv_asm_proc="#" opal_cv_asm_endproc="#" fi ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_ASM_GSYM dnl dnl Sets OPAL_ASM_GSYM to the prefix value on a symbol to make it dnl a global linkable from C. Basically, an _ or not. dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_ASM_GSYM],[ AC_CACHE_CHECK([prefix for global symbol labels], [opal_cv_asm_gsym], [_OPAL_CHECK_ASM_GSYM]) if test "$opal_cv_asm_gsym" = "none" ; then AC_MSG_ERROR([Could not determine global symbol label prefix]) fi AC_DEFINE_UNQUOTED([OPAL_ASM_GSYM], ["$opal_cv_asm_gsym"], [Assembly prefix for gsym labels]) OPAL_ASM_GSYM="$opal_cv_asm_gsym" AC_SUBST(OPAL_ASM_GSYM) ]) AC_DEFUN([_OPAL_CHECK_ASM_GSYM],[ opal_cv_asm_gsym="none" for sym in "_" "" "." ; do asm_result=0 echo "configure: trying $sym" >&AC_FD_CC cat > conftest_c.c <&AC_FD_CC opal_link="$CC $CFLAGS conftest_c.$OBJEXT conftest.$OBJEXT -o conftest $LDFLAGS $LIBS > conftest.link 2>&1" if AC_TRY_EVAL(opal_link) ; then # save the warnings cat conftest.link >&AC_FD_CC asm_result=1 else cat conftest.link >&AC_FD_CC echo "configure: failed C program was: " >&AC_FD_CC cat conftest_c.c >&AC_FD_CC echo "configure: failed ASM program was: " >&AC_FD_CC cat conftest.s >&AC_FD_CC asm_result=0 fi else # save output and failed program cat conftest.cmpl >&AC_FD_CC echo "configure: failed C program was: " >&AC_FD_CC cat conftest.c >&AC_FD_CC asm_result=0 fi], [asm_result=0]) if test "$asm_result" = "1" ; then opal_cv_asm_gsym="$sym" break fi done rm -rf conftest.* ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_ASM_LABEL_SUFFIX dnl dnl Sets OPAL_ASM_LABEL_SUFFIX to the value to suffix for labels dnl dnl I'm sure if I don't have a test for this, there will be some dnl dumb platform that uses something else dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_ASM_LABEL_SUFFIX],[ AC_MSG_CHECKING([suffix for labels]) opal_cv_asm_label_suffix="" case $host in *) opal_cv_asm_label_suffix=":" ;; esac AC_MSG_RESULT([$opal_cv_asm_label_suffix]) AC_DEFINE_UNQUOTED([OPAL_ASM_LABEL_SUFFIX], ["$opal_cv_asm_label_suffix"], [Assembly suffix for labels]) OPAL_ASM_LABEL_SUFFIX="$opal_cv_asm_label_suffix" AC_SUBST(OPAL_AS_LABEL_SUFFIX) ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_ASM_ALIGN_LOG dnl dnl Sets OPAL_ASM_ALIGN_LOG to 1 if align is specified dnl logarithmically, 0 otherwise dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_ASM_ALIGN_LOG],[ AC_REQUIRE([AC_PROG_NM]) AC_REQUIRE([AC_PROG_GREP]) AC_CACHE_CHECK([if .align directive takes logarithmic value], [opal_cv_asm_align_log], [ OPAL_TRY_ASSEMBLE([ $opal_cv_asm_text .align 4 $opal_cv_asm_global foo .byte 1 .align 4 foo$opal_cv_asm_label_suffix .byte 2], [opal_asm_addr=[`$NM conftest.$OBJEXT | $GREP foo | sed -e 's/.*\([0-9a-fA-F][0-9a-fA-F]\).*foo.*/\1/'`]], [opal_asm_addr=""]) # test for both 16 and 10 (decimal and hex notations) echo "configure: .align test address offset is $opal_asm_addr" >&AC_FD_CC if test "$opal_asm_addr" = "16" || test "$opal_asm_addr" = "10" ; then opal_cv_asm_align_log="yes" else opal_cv_asm_align_log="no" fi]) if test "$opal_cv_asm_align_log" = "yes" || test "$opal_cv_asm_align_log" = "1" ; then opal_asm_align_log_result=1 else opal_asm_align_log_result=0 fi AC_DEFINE_UNQUOTED([OPAL_ASM_ALIGN_LOG], [$asm_align_log_result], [Assembly align directive expects logarithmic value]) unset omp_asm_addr asm_result ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_ASM_TYPE dnl dnl Sets OPAL_ASM_TYPE to the prefix for the function type to dnl set a symbol's type as function (needed on ELF for shared dnl libraries). If no .type directive is needed, sets OPAL_ASM_TYPE dnl to an empty string dnl dnl We look for @ \# % dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_ASM_TYPE],[ AC_CACHE_CHECK([prefix for function in .type], [opal_cv_asm_type], [_OPAL_CHECK_ASM_TYPE]) AC_DEFINE_UNQUOTED([OPAL_ASM_TYPE], ["$opal_cv_asm_type"], [How to set function type in .type directive]) OPAL_ASM_TYPE="$opal_cv_asm_type" AC_SUBST(OPAL_ASM_TYPE) ]) AC_DEFUN([_OPAL_CHECK_ASM_TYPE],[ opal_cv_asm_type="" case "${host}" in *-sun-solaris*) # GCC on solaris seems to accept just about anything, not # that what it defines actually works... So just hardwire # to the right answer opal_cv_asm_type="#" ;; *) for type in @ \# % ; do asm_result=0 echo "configure: trying $type" >&AC_FD_CC OPAL_TRY_ASSEMBLE([ .type mysym, ${type}function mysym:], [opal_cv_asm_type="${type}" asm_result=1]) if test "$asm_result" = "1" ; then break fi done ;; esac rm -f conftest.out unset asm_result type ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_ASM_SIZE dnl dnl Sets OPAL_ASM_SIZE to 1 if we should set .size directives for dnl each function, 0 otherwise. dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_ASM_SIZE],[ AC_CACHE_CHECK([if .size is needed], [opal_cv_asm_need_size], [opal_cv_asm_need_size="no" OPAL_TRY_ASSEMBLE([ .size mysym, 1], [opal_cv_asm_need_size="yes"]) rm -f conftest.out]) if test "$opal_cv_asm_need_size" = "yes" ; then opal_asm_size=1 else opal_asm_size=0 fi AC_DEFINE_UNQUOTED([OPAL_ASM_SIZE], ["$opal_asm_size"], [Do we need to give a .size directive]) OPAL_ASM_SIZE="$opal_asm_size" AC_SUBST(OPAL_ASM_TYPE) unset asm_result ])dnl # OPAL_CHECK_ASM_GNU_STACKEXEC(var) # ---------------------------------- # sets shell variable var to the things necessary to # disable execable stacks with GAS AC_DEFUN([OPAL_CHECK_ASM_GNU_STACKEXEC], [ AC_REQUIRE([AC_PROG_GREP]) AC_CHECK_PROG([OBJDUMP], [objdump], [objdump]) AC_CACHE_CHECK([if .note.GNU-stack is needed], [opal_cv_asm_gnu_stack_result], [AS_IF([test "$OBJDUMP" != ""], [ # first, see if a simple C program has it set cat >conftest.c < /dev/null && opal_cv_asm_gnu_stack_result=yes], [OPAL_LOG_MSG([the failed program was:], 1) OPAL_LOG_FILE([conftest.c]) opal_cv_asm_gnu_stack_result=no]) if test "$opal_cv_asm_gnu_stack_result" != "yes" ; then opal_cv_asm_gnu_stack_result="no" fi rm -rf conftest.*], [opal_cv_asm_gnu_stack_result="no"])]) if test "$opal_cv_asm_gnu_stack_result" = "yes" ; then opal_cv_asm_gnu_stack=1 else opal_cv_asm_gnu_stack=0 fi ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_POWERPC_REG dnl dnl See if the notation for specifying registers is X (most everyone) dnl or rX (OS X) dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_POWERPC_REG],[ AC_MSG_CHECKING([if PowerPC registers have r prefix]) OPAL_TRY_ASSEMBLE([$opal_cv_asm_text addi 1,1,0], [opal_cv_asm_powerpc_r_reg=0], [OPAL_TRY_ASSEMBLE([$opal_cv_asm_text addi r1,r1,0], [opal_cv_asm_powerpc_r_reg=1], [AC_MSG_ERROR([Can not determine how to use PPC registers])])]) if test "$opal_cv_asm_powerpc_r_reg" = "1" ; then AC_MSG_RESULT([yes]) else AC_MSG_RESULT([no]) fi AC_DEFINE_UNQUOTED([OPAL_POWERPC_R_REGISTERS], [$opal_cv_asm_powerpc_r_reg], [Whether r notation is used for ppc registers]) ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_POWERPC_64BIT dnl dnl On some powerpc chips (the PPC970 or G5), the OS usually runs in dnl 32 bit mode, even though the hardware can do 64bit things. If dnl the compiler will let us, emit code for 64bit test and set type dnl operations (on a long long). dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_POWERPC_64BIT],[ if test "$ac_cv_sizeof_long" != "4" ; then # this function should only be called in the 32 bit case AC_MSG_ERROR([CHECK_POWERPC_64BIT called on 64 bit platform. Internal error.]) fi AC_MSG_CHECKING([for 64-bit PowerPC assembly support]) case $host in *-darwin*) ppc64_result=0 if test "$opal_cv_asm_powerpc_r_reg" = "1" ; then ldarx_asm=" ldarx r1,r1,r1"; else ldarx_asm=" ldarx 1,1,1"; fi OPAL_TRY_ASSEMBLE([$opal_cv_asm_text $ldarx_asm], [ppc64_result=1], [ppc64_result=0]) ;; *) ppc64_result=0 ;; esac if test "$ppc64_result" = "1" ; then AC_MSG_RESULT([yes]) ifelse([$1],,:,[$1]) else AC_MSG_RESULT([no]) ifelse([$2],,:,[$2]) fi unset ppc64_result ldarx_asm ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_SPARCV8PLUS dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_SPARCV8PLUS],[ AC_MSG_CHECKING([if have Sparc v8+/v9 support]) sparc_result=0 OPAL_TRY_ASSEMBLE([$opal_cv_asm_text casa [%o0] 0x80, %o1, %o2], [sparc_result=1], [sparc_result=0]) if test "$sparc_result" = "1" ; then AC_MSG_RESULT([yes]) ifelse([$1],,:,[$1]) else AC_MSG_RESULT([no]) ifelse([$2],,:,[$2]) fi unset sparc_result ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_CMPXCHG16B dnl dnl ################################################################# AC_DEFUN([OPAL_CMPXCHG16B_TEST_SOURCE],[[ #include #include union opal_counted_pointer_t { struct { uint64_t counter; uint64_t item; } data; #if defined(HAVE___INT128) && HAVE___INT128 __int128 value; #elif defined(HAVE_INT128_T) && HAVE_INT128_T int128_t value; #endif }; typedef union opal_counted_pointer_t opal_counted_pointer_t; int main(int argc, char* argv) { volatile opal_counted_pointer_t a; opal_counted_pointer_t b; a.data.counter = 0; a.data.item = 0x1234567890ABCDEF; b.data.counter = a.data.counter; b.data.item = a.data.item; /* bozo checks */ assert(16 == sizeof(opal_counted_pointer_t)); assert(a.data.counter == b.data.counter); assert(a.data.item == b.data.item); /* * the following test fails on buggy compilers * so far, with icc -o conftest conftest.c * - intel icc 14.0.0.080 (aka 2013sp1) * - intel icc 14.0.1.106 (aka 2013sp1u1) * older and more recents compilers work fine * buggy compilers work also fine but only with -O0 */ #if (defined(HAVE___INT128) && HAVE___INT128) || (defined(HAVE_INT128_T) && HAVE_INT128_T) return (a.value != b.value); #else return 0; #endif } ]]) AC_DEFUN([OPAL_CHECK_CMPXCHG16B],[ OPAL_VAR_SCOPE_PUSH([cmpxchg16b_result]) OPAL_ASM_CHECK_ATOMIC_FUNC([cmpxchg16b], [AC_LANG_PROGRAM([[unsigned char tmp[16];]], [[__asm__ __volatile__ ("lock cmpxchg16b (%%rsi)" : : "S" (tmp) : "memory", "cc");]])], [cmpxchg16b_result=1], [cmpxchg16b_result=0]) # If we have it, make sure it works. AS_IF([test $cmpxchg16b_result -eq 1], [AC_MSG_CHECKING([if cmpxchg16b_result works]) AC_RUN_IFELSE([AC_LANG_SOURCE(OPAL_CMPXCHG16B_TEST_SOURCE)], [AC_MSG_RESULT([yes])], [cmpxchg16b_result=0 AC_MSG_RESULT([no])], [AC_MSG_RESULT([cannot test -- assume yes (cross compiling)])]) ]) AC_DEFINE_UNQUOTED([OPAL_HAVE_CMPXCHG16B], [$cmpxchg16b_result], [Whether the processor supports the cmpxchg16b instruction]) OPAL_VAR_SCOPE_POP ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_INLINE_GCC dnl dnl Check if the compiler is capable of doing GCC-style inline dnl assembly. Some compilers emit a warning and ignore the inline dnl assembly (xlc on OS X) and compile without error. Therefore, dnl the test attempts to run the emitted code to check that the dnl assembly is actually run. To run this test, one argument to dnl the macro must be an assembly instruction in gcc format to move dnl the value 0 into the register containing the variable ret. dnl For PowerPC, this would be: dnl dnl "li %0,0" : "=&r"(ret) dnl dnl For testing ia32 assembly, the assembly instruction xaddl is dnl tested. The xaddl instruction is used by some of the atomic dnl implementations so it makes sense to test for it. In addition, dnl some compilers (i.e. earlier versions of Sun Studio 12) do not dnl necessarily handle xaddl properly, so that needs to be detected dnl during configure time. dnl dnl DEFINE OPAL_GCC_INLINE_ASSEMBLY to 0 or 1 depending on GCC dnl support dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_INLINE_C_GCC],[ assembly="$1" asm_result="unknown" AC_MSG_CHECKING([if $CC supports GCC inline assembly]) if test ! "$assembly" = "" ; then AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],[[ int ret = 1; int negone = -1; __asm__ __volatile__ ($assembly); return ret; ]])], [asm_result="yes"], [asm_result="no"], [asm_result="unknown"]) else assembly="test skipped - assuming no" fi # if we're cross compiling, just try to compile and figure good enough if test "$asm_result" = "unknown" ; then AC_LINK_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],[[ int ret = 1; int negone = -1; __asm__ __volatile__ ($assembly); return ret; ]])], [asm_result="yes"], [asm_result="no"]) fi AC_MSG_RESULT([$asm_result]) if test "$asm_result" = "yes" ; then OPAL_C_GCC_INLINE_ASSEMBLY=1 opal_cv_asm_inline_supported="yes" else OPAL_C_GCC_INLINE_ASSEMBLY=0 fi AC_DEFINE_UNQUOTED([OPAL_C_GCC_INLINE_ASSEMBLY], [$OPAL_C_GCC_INLINE_ASSEMBLY], [Whether C compiler supports GCC style inline assembly]) unset OPAL_C_GCC_INLINE_ASSEMBLY assembly asm_result ])dnl dnl ################################################################# dnl dnl OPAL_CONFIG_ASM dnl dnl DEFINE OPAL_ASSEMBLY_ARCH to something in sys/architecture.h dnl DEFINE OPAL_ASSEMBLY_FORMAT to string containing correct dnl format for assembly (not user friendly) dnl SUBST OPAL_ASSEMBLY_FORMAT to string containing correct dnl format for assembly (not user friendly) dnl dnl ################################################################# AC_DEFUN([OPAL_CONFIG_ASM],[ AC_REQUIRE([OPAL_SETUP_CC]) AC_REQUIRE([AM_PROG_AS]) AC_ARG_ENABLE([builtin-atomics], [AC_HELP_STRING([--enable-builtin-atomics], [Enable use of __sync builtin atomics (default: enabled)])]) opal_cv_asm_builtin="BUILTIN_NO" AS_IF([test "$opal_cv_asm_builtin" = "BUILTIN_NO" && test "$enable_builtin_atomics" != "no"], [OPAL_CHECK_GCC_ATOMIC_BUILTINS([opal_cv_asm_builtin="BUILTIN_GCC"], [])]) AS_IF([test "$opal_cv_asm_builtin" = "BUILTIN_NO" && test "$enable_builtin_atomics" != "no"], [OPAL_CHECK_SYNC_BUILTINS([opal_cv_asm_builtin="BUILTIN_SYNC"], [])]) AS_IF([test "$opal_cv_asm_builtin" = "BUILTIN_NO" && test "$enable_builtin_atomics" = "yes"], [AC_MSG_ERROR([__sync builtin atomics requested but not found.])]) OPAL_CHECK_ASM_PROC OPAL_CHECK_ASM_TEXT OPAL_CHECK_ASM_GLOBAL OPAL_CHECK_ASM_GNU_STACKEXEC OPAL_CHECK_ASM_LABEL_SUFFIX OPAL_CHECK_ASM_GSYM OPAL_CHECK_ASM_LSYM OPAL_CHECK_ASM_TYPE OPAL_CHECK_ASM_SIZE OPAL_CHECK_ASM_ALIGN_LOG # find our architecture for purposes of assembly stuff opal_cv_asm_arch="UNSUPPORTED" OPAL_GCC_INLINE_ASSIGN="" OPAL_ASM_SUPPORT_64BIT=0 case "${host}" in x86_64-*x32) opal_cv_asm_arch="X86_64" OPAL_ASM_SUPPORT_64BIT=1 OPAL_GCC_INLINE_ASSIGN='"xaddl %1,%0" : "=m"(ret), "+r"(negone) : "m"(ret)' ;; i?86-*|x86_64*|amd64*) if test "$ac_cv_sizeof_long" = "4" ; then opal_cv_asm_arch="IA32" else opal_cv_asm_arch="X86_64" fi OPAL_ASM_SUPPORT_64BIT=1 OPAL_GCC_INLINE_ASSIGN='"xaddl %1,%0" : "=m"(ret), "+r"(negone) : "m"(ret)' OPAL_CHECK_CMPXCHG16B ;; ia64-*) opal_cv_asm_arch="IA64" OPAL_CHECK_SYNC_BUILTINS([opal_cv_asm_builtin="BUILTIN_SYNC"], [AC_MSG_ERROR([No atomic primitives available for $host])]) ;; aarch64*) opal_cv_asm_arch="ARM64" OPAL_ASM_SUPPORT_64BIT=1 OPAL_ASM_ARM_VERSION=8 AC_DEFINE_UNQUOTED([OPAL_ASM_ARM_VERSION], [$OPAL_ASM_ARM_VERSION], [What ARM assembly version to use]) OPAL_GCC_INLINE_ASSIGN='"mov %0, #0" : "=&r"(ret)' ;; armv7*|arm-*-linux-gnueabihf) opal_cv_asm_arch="ARM" OPAL_ASM_SUPPORT_64BIT=1 OPAL_ASM_ARM_VERSION=7 AC_DEFINE_UNQUOTED([OPAL_ASM_ARM_VERSION], [$OPAL_ASM_ARM_VERSION], [What ARM assembly version to use]) OPAL_GCC_INLINE_ASSIGN='"mov %0, #0" : "=&r"(ret)' ;; armv6*) opal_cv_asm_arch="ARM" OPAL_ASM_SUPPORT_64BIT=0 OPAL_ASM_ARM_VERSION=6 CCASFLAGS="$CCASFLAGS -march=armv7-a" AC_DEFINE_UNQUOTED([OPAL_ASM_ARM_VERSION], [$OPAL_ASM_ARM_VERSION], [What ARM assembly version to use]) OPAL_GCC_INLINE_ASSIGN='"mov %0, #0" : "=&r"(ret)' ;; armv5*linux*|armv4*linux*|arm-*-linux-gnueabi) # uses Linux kernel helpers for some atomic operations opal_cv_asm_arch="ARM" OPAL_CHECK_SYNC_BUILTINS([opal_cv_asm_builtin="BUILTIN_SYNC"], [AC_MSG_ERROR([No atomic primitives available for $host])]) ;; mips-*|mips64*) # Should really find some way to make sure that we are on # a MIPS III machine (r4000 and later) opal_cv_asm_arch="MIPS" OPAL_CHECK_SYNC_BUILTINS([opal_cv_asm_builtin="BUILTIN_SYNC"], [AC_MSG_ERROR([No atomic primitives available for $host])]) ;; powerpc-*|powerpc64-*|powerpcle-*|powerpc64le-*|rs6000-*|ppc-*) OPAL_CHECK_POWERPC_REG if test "$ac_cv_sizeof_long" = "4" ; then opal_cv_asm_arch="POWERPC32" # Note that on some platforms (Apple G5), even if we are # compiling in 32 bit mode (and therefore should assume # sizeof(long) == 4), we can use the 64 bit test and set # operations. OPAL_CHECK_POWERPC_64BIT(OPAL_ASM_SUPPORT_64BIT=1) elif test "$ac_cv_sizeof_long" = "8" ; then OPAL_ASM_SUPPORT_64BIT=1 opal_cv_asm_arch="POWERPC64" else AC_MSG_ERROR([Could not determine PowerPC word size: $ac_cv_sizeof_long]) fi OPAL_GCC_INLINE_ASSIGN='"1: li %0,0" : "=&r"(ret)' ;; # There is no current difference between s390 and s390x # But use two different defines in case some come later # as s390 is 31bits while s390x is 64bits s390-*) opal_cv_asm_arch="S390" OPAL_CHECK_SYNC_BUILTINS([opal_cv_asm_builtin="BUILTIN_SYNC"], [AC_MSG_ERROR([No atomic primitives available for $host])]) ;; s390x-*) opal_cv_asm_arch="S390X" OPAL_CHECK_SYNC_BUILTINS([opal_cv_asm_builtin="BUILTIN_SYNC"], [AC_MSG_ERROR([No atomic primitives available for $host])]) ;; sparc*-*) # SPARC v9 (and above) are the only ones with 64bit support # if compiling 32 bit, see if we are v9 (aka v8plus) or # earlier (casa is v8+/v9). if test "$ac_cv_sizeof_long" = "4" ; then have_v8plus=0 OPAL_CHECK_SPARCV8PLUS([have_v8plus=1]) if test "$have_v8plus" = "0" ; then OPAL_ASM_SUPPORT_64BIT=0 opal_cv_asm_arch="SPARC" AC_MSG_WARN([Sparc v8 target is not supported in this release of Open MPI.]) AC_MSG_WARN([You must specify the target architecture v8plus to compile]) AC_MSG_WARN([Open MPI in 32 bit mode on Sparc processors (see the README).]) AC_MSG_ERROR([Can not continue.]) else OPAL_ASM_SUPPORT_64BIT=1 opal_cv_asm_arch="SPARCV9_32" fi elif test "$ac_cv_sizeof_long" = "8" ; then OPAL_ASM_SUPPORT_64BIT=1 opal_cv_asm_arch="SPARCV9_64" else AC_MSG_ERROR([Could not determine Sparc word size: $ac_cv_sizeof_long]) fi OPAL_GCC_INLINE_ASSIGN='"mov 0,%0" : "=&r"(ret)' ;; *) OPAL_CHECK_SYNC_BUILTINS([opal_cv_asm_builtin="BUILTIN_SYNC"], [AC_MSG_ERROR([No atomic primitives available for $host])]) ;; esac if test "x$OPAL_ASM_SUPPORT_64BIT" = "x1" && test "$opal_cv_asm_builtin" = "BUILTIN_SYNC" && test "$opal_asm_sync_have_64bit" = "0" ; then # __sync builtins exist but do not implement 64-bit support. Fall back on inline asm. opal_cv_asm_builtin="BUILTIN_NO" fi if test "$opal_cv_asm_builtin" = "BUILTIN_SYNC" || test "$opal_cv_asm_builtin" = "BUILTIN_GCC" ; then AC_DEFINE([OPAL_C_GCC_INLINE_ASSEMBLY], [1], [Whether C compiler supports GCC style inline assembly]) else AC_DEFINE_UNQUOTED([OPAL_ASM_SUPPORT_64BIT], [$OPAL_ASM_SUPPORT_64BIT], [Whether we can do 64bit assembly operations or not. Should not be used outside of the assembly header files]) AC_SUBST([OPAL_ASM_SUPPORT_64BIT]) # # figure out if we need any special function start / stop code # case $host_os in aix*) opal_asm_arch_config="aix" ;; *) opal_asm_arch_config="default" ;; esac opal_cv_asm_inline_supported="no" # now that we know our architecture, try to inline assemble OPAL_CHECK_INLINE_C_GCC([$OPAL_GCC_INLINE_ASSIGN]) # format: # config_file-text-global-label_suffix-gsym-lsym-type-size-align_log-ppc_r_reg-64_bit-gnu_stack asm_format="${opal_asm_arch_config}" asm_format="${asm_format}-${opal_cv_asm_text}-${opal_cv_asm_global}" asm_format="${asm_format}-${opal_cv_asm_label_suffix}-${opal_cv_asm_gsym}" asm_format="${asm_format}-${opal_cv_asm_lsym}" asm_format="${asm_format}-${opal_cv_asm_type}-${opal_asm_size}" asm_format="${asm_format}-${opal_asm_align_log_result}" if test "$opal_cv_asm_arch" = "POWERPC32" || test "$opal_cv_asm_arch" = "POWERPC64" ; then asm_format="${asm_format}-${opal_cv_asm_powerpc_r_reg}" else asm_format="${asm_format}-1" fi asm_format="${asm_format}-${OPAL_ASM_SUPPORT_64BIT}" opal_cv_asm_format="${asm_format}-${opal_cv_asm_gnu_stack}" # For the Makefile, need to escape the $ as $$. Don't display # this version, but make sure the Makefile gives the right thing # when regenerating the files because the base has been touched. OPAL_ASSEMBLY_FORMAT=`echo "$opal_cv_asm_format" | sed -e 's/\\\$/\\\$\\\$/'` AC_MSG_CHECKING([for assembly format]) AC_MSG_RESULT([$opal_cv_asm_format]) AC_DEFINE_UNQUOTED([OPAL_ASSEMBLY_FORMAT], ["$OPAL_ASSEMBLY_FORMAT"], [Format of assembly file]) AC_SUBST([OPAL_ASSEMBLY_FORMAT]) fi # if opal_cv_asm_builtin = BUILTIN_SYNC result="OPAL_$opal_cv_asm_arch" OPAL_ASSEMBLY_ARCH="$opal_cv_asm_arch" AC_MSG_CHECKING([for assembly architecture]) AC_MSG_RESULT([$opal_cv_asm_arch]) AC_DEFINE_UNQUOTED([OPAL_ASSEMBLY_ARCH], [$result], [Architecture type of assembly to use for atomic operations and CMA]) AC_SUBST([OPAL_ASSEMBLY_ARCH]) # Check for RDTSCP support result=0 AS_IF([test "$opal_cv_asm_arch" = "X86_64" || test "$opal_cv_asm_arch" = "IA32"], [AC_MSG_CHECKING([for RDTSCP assembly support]) AC_LANG_PUSH([C]) AC_TRY_RUN([[ int main(int argc, char* argv[]) { unsigned int rax, rdx; __asm__ __volatile__ ("rdtscp\n": "=a" (rax), "=d" (rdx):: "%rax", "%rdx"); return 0; } ]], [result=1 AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no])], [#cross compile not supported AC_MSG_RESULT(["no (cross compiling)"])]) AC_LANG_POP([C])]) AC_DEFINE_UNQUOTED([OPAL_ASSEMBLY_SUPPORTS_RDTSCP], [$result], [Whether we have support for RDTSCP instruction]) result="OPAL_$opal_cv_asm_builtin" OPAL_ASSEMBLY_BUILTIN="$opal_cv_asm_builtin" AC_MSG_CHECKING([for builtin atomics]) AC_MSG_RESULT([$opal_cv_asm_builtin]) AC_DEFINE_UNQUOTED([OPAL_ASSEMBLY_BUILTIN], [$result], [Whether to use builtin atomics]) AC_SUBST([OPAL_ASSEMBLY_BUILTIN]) OPAL_ASM_FIND_FILE unset result asm_format ])dnl dnl ################################################################# dnl dnl OPAL_ASM_FIND_FILE dnl dnl dnl do all the evil mojo to provide a working assembly file dnl dnl ################################################################# AC_DEFUN([OPAL_ASM_FIND_FILE], [ AC_REQUIRE([AC_PROG_GREP]) AC_REQUIRE([AC_PROG_FGREP]) if test "$opal_cv_asm_arch" != "WINDOWS" && test "$opal_cv_asm_builtin" != "BUILTIN_SYNC" && test "$opal_cv_asm_builtin" != "BUILTIN_GCC" && test "$opal_cv_asm_builtin" != "BUILTIN_OSX" && test "$opal_cv_asm_inline_arch" = "no" ; then AC_MSG_ERROR([no atomic support available. exiting]) else # On windows with VC++, atomics are done with compiler primitives opal_cv_asm_file="" fi ])dnl