intel RTM

[Xin Tong <trent.tong@xxxxxxxxx>]

I ran into problems compiling this intel restricted transactional
memory test case with gcc 4.9.1. Intel ICC compiles the test case fine
with  icc -O3 test-intelrtm.c -lpthread

Trent
Thanks,

#include <stdio.h>
#include <pthread.h>
#include <immintrin.h>  /* _XBEGIN_START */

#define ARRAY_SIZE 1024
#define TESTTHREAD_COUNT 32
/* lock for atomic access to the testarray */
static pthread_mutex_t arraylock;
static pthread_t* threadarray;
static int testarray[ARRAY_SIZE];

static void increment_func(void* arg) {
     int i;
     long int threadnum = (long int)arg;
     unsigned int status;
     if ((status = _xbegin ()) == _XBEGIN_STARTED){
         /* test _xtest() and _xabort(). fallback path for odd-num thread */
         if (_xtest() && (threadnum % 2)) _xabort(_XABORT_EXPLICIT);
         for (i = 0; i < ARRAY_SIZE; ++i) testarray[i] ++;
         _xend();
     } else {
         /* fallback path. hold array lock */
         pthread_mutex_lock(&arraylock);
         for (i = 0; i < ARRAY_SIZE; ++i) testarray[i] ++;
         /* release array lock */
         pthread_mutex_unlock(&arraylock);
    }
}

bash-4.1$ gcc  test-intelrtm.c -lpthread
test-intelrtm.c: In function ‘run_test’:
test-intelrtm.c:44:82: warning: cast to pointer from integer of
different size [-Wint-to-pointer-cast]
          pthread_create(&threadarray[i], NULL, (void
*(*)(void*))increment_func, (void*)i);

           ^
In file included from
/site/sc/rdrive/ref/gcc/4.9.1/rhel60/efi2/lib/gcc/x86_64-unknown-linux-gnu/4.9.1/include/immintrin.h:65:0,
                 from test-intelrtm.c:12:
test-intelrtm.c: In function ‘increment_func’:
/site/sc/rdrive/ref/gcc/4.9.1/rhel60/efi2/lib/gcc/x86_64-unknown-linux-gnu/4.9.1/include/rtmintrin.h:50:1:
error: inlining failed in call to always_inline ‘_xbegin’: target
specific option mismatch
 _xbegin (void)
 ^
test-intelrtm.c:25:9: error: called from here
      if ((status = _xbegin ()) == _XBEGIN_STARTED){
         ^
In file included from
/site/sc/rdrive/ref/gcc/4.9.1/rhel60/efi2/lib/gcc/x86_64-unknown-linux-gnu/4.9.1/include/immintrin.h:67:0,
                 from test-intelrtm.c:12:
/site/sc/rdrive/ref/gcc/4.9.1/rhel60/efi2/lib/gcc/x86_64-unknown-linux-gnu/4.9.1/include/xtestintrin.h:41:1:
error: inlining failed in call to always_inline ‘_xtest’: target
specific option mismatch
 _xtest (void)
 ^
test-intelrtm.c:27:14: error: called from here
          if (_xtest() && (threadnum % 2)) _xabort(_XABORT_EXPLICIT);
              ^
In file included from
/site/sc/rdrive/ref/gcc/4.9.1/rhel60/efi2/lib/gcc/x86_64-unknown-linux-gnu/4.9.1/include/immintrin.h:65:0,
                 from test-intelrtm.c:12:
/site/sc/rdrive/ref/gcc/4.9.1/rhel60/efi2/lib/gcc/x86_64-unknown-linux-gnu/4.9.1/include/rtmintrin.h:61:1:
error: inlining failed in call to always_inline ‘_xend’: target
specific option mismatch
 _xend (void)
 ^
test-intelrtm.c:29:10: error: called from here
          _xend();
          ^
bash-4.1$ gcc --version
gcc (GCC) 4.9.1
Copyright (C) 2014 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.