213 lines
6.4 KiB
C
213 lines
6.4 KiB
C
/* { dg-do run } */
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/* { dg-require-effective-target sync_long_long_runtime } */
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/* { dg-require-effective-target pthread_h } */
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/* { dg-require-effective-target pthread } */
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/* { dg-options "-pthread -std=gnu99" } */
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/* { dg-additional-options "-march=pentium" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
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/* test of long long atomic ops performed in parallel in 3 pthreads
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david.gilbert@linaro.org */
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#include <pthread.h>
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#include <unistd.h>
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#ifdef _WIN32
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#include <windows.h>
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#endif
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/*#define DEBUGIT 1 */
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#ifdef DEBUGIT
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#include <stdio.h>
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#define DOABORT(x,...) {\
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fprintf (stderr, x, __VA_ARGS__); fflush (stderr); abort ();\
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}
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#else
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#define DOABORT(x,...) abort ();
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#endif
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/* Passed to each thread to describe which bits it is going to work on. */
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struct threadwork {
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unsigned long long count; /* incremented each time the worker loops. */
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unsigned int thread; /* ID */
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unsigned int addlsb; /* 8 bit */
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unsigned int logic1lsb; /* 5 bit */
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unsigned int logic2lsb; /* 8 bit */
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};
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/* The shared word where all the atomic work is done. */
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static volatile long long workspace;
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/* A shared word to tell the workers to quit when non-0. */
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static long long doquit;
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extern void abort (void);
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/* Note this test doesn't test the return values much. */
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void*
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worker (void* data)
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{
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struct threadwork *tw = (struct threadwork*)data;
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long long add1bit = 1ll << tw->addlsb;
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long long logic1bit = 1ll << tw->logic1lsb;
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long long logic2bit = 1ll << tw->logic2lsb;
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/* Clear the bits we use. */
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__sync_and_and_fetch (&workspace, ~(0xffll * add1bit));
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__sync_fetch_and_and (&workspace, ~(0x1fll * logic1bit));
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__sync_fetch_and_and (&workspace, ~(0xffll * logic2bit));
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do
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{
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long long tmp1, tmp2, tmp3;
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/* OK, lets try and do some stuff to the workspace - by the end
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of the main loop our area should be the same as it is now - i.e. 0. */
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/* Push the arithmetic section up to 128 - one of the threads will
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case this to carry across the 32bit boundary. */
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for (tmp2 = 0; tmp2 < 64; tmp2++)
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{
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/* Add 2 using the two different adds. */
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tmp1 = __sync_add_and_fetch (&workspace, add1bit);
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tmp3 = __sync_fetch_and_add (&workspace, add1bit);
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/* The value should be the intermediate add value in both cases. */
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if ((tmp1 & (add1bit * 0xff)) != (tmp3 & (add1bit * 0xff)))
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DOABORT ("Mismatch of add intermediates on thread %d "
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"workspace=0x%llx tmp1=0x%llx "
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"tmp2=0x%llx tmp3=0x%llx\n",
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tw->thread, workspace, tmp1, tmp2, tmp3);
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}
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/* Set the logic bits. */
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tmp2=__sync_or_and_fetch (&workspace,
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0x1fll * logic1bit | 0xffll * logic2bit);
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/* Check the logic bits are set and the arithmetic value is correct. */
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if ((tmp2 & (0x1fll * logic1bit | 0xffll * logic2bit
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| 0xffll * add1bit))
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!= (0x1fll * logic1bit | 0xffll * logic2bit | 0x80ll * add1bit))
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DOABORT ("Midloop check failed on thread %d "
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"workspace=0x%llx tmp2=0x%llx "
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"masktmp2=0x%llx expected=0x%llx\n",
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tw->thread, workspace, tmp2,
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tmp2 & (0x1fll * logic1bit | 0xffll * logic2bit |
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0xffll * add1bit),
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(0x1fll * logic1bit | 0xffll * logic2bit | 0x80ll * add1bit));
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/* Pull the arithmetic set back down to 0 - again this should cause a
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carry across the 32bit boundary in one thread. */
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for (tmp2 = 0; tmp2 < 64; tmp2++)
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{
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/* Subtract 2 using the two different subs. */
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tmp1=__sync_sub_and_fetch (&workspace, add1bit);
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tmp3=__sync_fetch_and_sub (&workspace, add1bit);
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/* The value should be the intermediate sub value in both cases. */
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if ((tmp1 & (add1bit * 0xff)) != (tmp3 & (add1bit * 0xff)))
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DOABORT ("Mismatch of sub intermediates on thread %d "
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"workspace=0x%llx tmp1=0x%llx "
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"tmp2=0x%llx tmp3=0x%llx\n",
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tw->thread, workspace, tmp1, tmp2, tmp3);
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}
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/* Clear the logic bits. */
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__sync_fetch_and_xor (&workspace, 0x1fll * logic1bit);
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tmp3=__sync_and_and_fetch (&workspace, ~(0xffll * logic2bit));
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/* The logic bits and the arithmetic bits should be zero again. */
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if (tmp3 & (0x1fll * logic1bit | 0xffll * logic2bit | 0xffll * add1bit))
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DOABORT ("End of worker loop; bits none 0 on thread %d "
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"workspace=0x%llx tmp3=0x%llx "
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"mask=0x%llx maskedtmp3=0x%llx\n",
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tw->thread, workspace, tmp3, (0x1fll * logic1bit |
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0xffll * logic2bit | 0xffll * add1bit),
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tmp3 & (0x1fll * logic1bit | 0xffll * logic2bit | 0xffll * add1bit));
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__sync_add_and_fetch (&tw->count, 1);
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}
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while (!__sync_bool_compare_and_swap (&doquit, 1, 1));
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pthread_exit (0);
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}
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int
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main ()
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{
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/* We have 3 threads doing three sets of operations, an 8 bit
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arithmetic field, a 5 bit logic field and an 8 bit logic
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field (just to pack them all in).
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6 5 4 4 3 2 1
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3 6 8 0 2 4 6 8 0
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|...,...|...,...|...,...|...,...|...,...|...,...|...,...|...,...
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- T0 -- T1 -- T2 --T2 -- T0 -*- T2-- T1-- T1 -***- T0-
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logic2 logic2 arith log2 arith log1 log1 arith log1
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*/
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unsigned int t;
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long long tmp;
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int err;
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struct threadwork tw[3]={
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{ 0ll, 0, 27, 0, 56 },
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{ 0ll, 1, 8,16, 48 },
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{ 0ll, 2, 40,21, 35 }
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};
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pthread_t threads[3];
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__sync_lock_release (&doquit);
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/* Get the work space into a known value - All 1's. */
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__sync_lock_release (&workspace); /* Now all 0. */
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tmp = __sync_val_compare_and_swap (&workspace, 0, -1ll);
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if (tmp!=0)
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DOABORT ("Initial __sync_val_compare_and_swap wasn't 0 workspace=0x%llx "
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"tmp=0x%llx\n", workspace,tmp);
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for (t = 0; t < 3; t++)
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{
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err=pthread_create (&threads[t], NULL , worker, &tw[t]);
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if (err) DOABORT ("pthread_create failed on thread %d with error %d\n",
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t, err);
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};
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#ifdef _WIN32
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Sleep (5000);
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#else
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sleep (5);
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#endif
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/* Stop please. */
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__sync_lock_test_and_set (&doquit, 1ll);
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for (t = 0; t < 3; t++)
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{
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err=pthread_join (threads[t], NULL);
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if (err)
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DOABORT ("pthread_join failed on thread %d with error %d\n", t, err);
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};
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__sync_synchronize ();
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/* OK, so all the workers have finished -
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the workers should have zero'd their workspace, the unused areas
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should still be 1. */
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if (!__sync_bool_compare_and_swap (&workspace, 0x040000e0ll, 0))
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DOABORT ("End of run workspace mismatch, got %llx\n", workspace);
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/* All the workers should have done some work. */
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for (t = 0; t < 3; t++)
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{
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if (tw[t].count == 0) DOABORT ("Worker %d gave 0 count\n", t);
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};
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return 0;
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}
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