diff options
Diffstat (limited to 'gcc-4.9/gcc/testsuite/gcc.dg/di-sync-multithread.c')
| -rw-r--r-- | gcc-4.9/gcc/testsuite/gcc.dg/di-sync-multithread.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/di-sync-multithread.c b/gcc-4.9/gcc/testsuite/gcc.dg/di-sync-multithread.c new file mode 100644 index 000000000..493f1e272 --- /dev/null +++ b/gcc-4.9/gcc/testsuite/gcc.dg/di-sync-multithread.c @@ -0,0 +1,213 @@ +/* { dg-do run } */ +/* { dg-require-effective-target sync_long_long_runtime } */ +/* { dg-require-effective-target pthread_h } */ +/* { dg-require-effective-target pthread } */ +/* { dg-options "-pthread -std=gnu99" } */ +/* { dg-additional-options "-march=pentium" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */ + +/* test of long long atomic ops performed in parallel in 3 pthreads + david.gilbert@linaro.org */ + +#include <pthread.h> +#include <unistd.h> +#ifdef _WIN32 +#include <windows.h> +#endif + +/*#define DEBUGIT 1 */ + +#ifdef DEBUGIT +#include <stdio.h> + +#define DOABORT(x,...) {\ + fprintf (stderr, x, __VA_ARGS__); fflush (stderr); abort ();\ + } + +#else + +#define DOABORT(x,...) abort (); + +#endif + +/* Passed to each thread to describe which bits it is going to work on. */ +struct threadwork { + unsigned long long count; /* incremented each time the worker loops. */ + unsigned int thread; /* ID */ + unsigned int addlsb; /* 8 bit */ + unsigned int logic1lsb; /* 5 bit */ + unsigned int logic2lsb; /* 8 bit */ +}; + +/* The shared word where all the atomic work is done. */ +static volatile long long workspace; + +/* A shared word to tell the workers to quit when non-0. */ +static long long doquit; + +extern void abort (void); + +/* Note this test doesn't test the return values much. */ +void* +worker (void* data) +{ + struct threadwork *tw = (struct threadwork*)data; + long long add1bit = 1ll << tw->addlsb; + long long logic1bit = 1ll << tw->logic1lsb; + long long logic2bit = 1ll << tw->logic2lsb; + + /* Clear the bits we use. */ + __sync_and_and_fetch (&workspace, ~(0xffll * add1bit)); + __sync_fetch_and_and (&workspace, ~(0x1fll * logic1bit)); + __sync_fetch_and_and (&workspace, ~(0xffll * logic2bit)); + + do + { + long long tmp1, tmp2, tmp3; + /* OK, lets try and do some stuff to the workspace - by the end + of the main loop our area should be the same as it is now - i.e. 0. */ + + /* Push the arithmetic section up to 128 - one of the threads will + case this to carry across the 32bit boundary. */ + for (tmp2 = 0; tmp2 < 64; tmp2++) + { + /* Add 2 using the two different adds. */ + tmp1 = __sync_add_and_fetch (&workspace, add1bit); + tmp3 = __sync_fetch_and_add (&workspace, add1bit); + + /* The value should be the intermediate add value in both cases. */ + if ((tmp1 & (add1bit * 0xff)) != (tmp3 & (add1bit * 0xff))) + DOABORT ("Mismatch of add intermediates on thread %d " + "workspace=0x%llx tmp1=0x%llx " + "tmp2=0x%llx tmp3=0x%llx\n", + tw->thread, workspace, tmp1, tmp2, tmp3); + } + + /* Set the logic bits. */ + tmp2=__sync_or_and_fetch (&workspace, + 0x1fll * logic1bit | 0xffll * logic2bit); + + /* Check the logic bits are set and the arithmetic value is correct. */ + if ((tmp2 & (0x1fll * logic1bit | 0xffll * logic2bit + | 0xffll * add1bit)) + != (0x1fll * logic1bit | 0xffll * logic2bit | 0x80ll * add1bit)) + DOABORT ("Midloop check failed on thread %d " + "workspace=0x%llx tmp2=0x%llx " + "masktmp2=0x%llx expected=0x%llx\n", + tw->thread, workspace, tmp2, + tmp2 & (0x1fll * logic1bit | 0xffll * logic2bit | + 0xffll * add1bit), + (0x1fll * logic1bit | 0xffll * logic2bit | 0x80ll * add1bit)); + + /* Pull the arithmetic set back down to 0 - again this should cause a + carry across the 32bit boundary in one thread. */ + + for (tmp2 = 0; tmp2 < 64; tmp2++) + { + /* Subtract 2 using the two different subs. */ + tmp1=__sync_sub_and_fetch (&workspace, add1bit); + tmp3=__sync_fetch_and_sub (&workspace, add1bit); + + /* The value should be the intermediate sub value in both cases. */ + if ((tmp1 & (add1bit * 0xff)) != (tmp3 & (add1bit * 0xff))) + DOABORT ("Mismatch of sub intermediates on thread %d " + "workspace=0x%llx tmp1=0x%llx " + "tmp2=0x%llx tmp3=0x%llx\n", + tw->thread, workspace, tmp1, tmp2, tmp3); + } + + + /* Clear the logic bits. */ + __sync_fetch_and_xor (&workspace, 0x1fll * logic1bit); + tmp3=__sync_and_and_fetch (&workspace, ~(0xffll * logic2bit)); + + /* The logic bits and the arithmetic bits should be zero again. */ + if (tmp3 & (0x1fll * logic1bit | 0xffll * logic2bit | 0xffll * add1bit)) + DOABORT ("End of worker loop; bits none 0 on thread %d " + "workspace=0x%llx tmp3=0x%llx " + "mask=0x%llx maskedtmp3=0x%llx\n", + tw->thread, workspace, tmp3, (0x1fll * logic1bit | + 0xffll * logic2bit | 0xffll * add1bit), + tmp3 & (0x1fll * logic1bit | 0xffll * logic2bit | 0xffll * add1bit)); + + __sync_add_and_fetch (&tw->count, 1); + } + while (!__sync_bool_compare_and_swap (&doquit, 1, 1)); + + pthread_exit (0); +} + +int +main () +{ + /* We have 3 threads doing three sets of operations, an 8 bit + arithmetic field, a 5 bit logic field and an 8 bit logic + field (just to pack them all in). + + 6 5 4 4 3 2 1 + 3 6 8 0 2 4 6 8 0 + |...,...|...,...|...,...|...,...|...,...|...,...|...,...|...,... + - T0 -- T1 -- T2 --T2 -- T0 -*- T2-- T1-- T1 -***- T0- + logic2 logic2 arith log2 arith log1 log1 arith log1 + + */ + unsigned int t; + long long tmp; + int err; + + struct threadwork tw[3]={ + { 0ll, 0, 27, 0, 56 }, + { 0ll, 1, 8,16, 48 }, + { 0ll, 2, 40,21, 35 } + }; + + pthread_t threads[3]; + + __sync_lock_release (&doquit); + + /* Get the work space into a known value - All 1's. */ + __sync_lock_release (&workspace); /* Now all 0. */ + tmp = __sync_val_compare_and_swap (&workspace, 0, -1ll); + if (tmp!=0) + DOABORT ("Initial __sync_val_compare_and_swap wasn't 0 workspace=0x%llx " + "tmp=0x%llx\n", workspace,tmp); + + for (t = 0; t < 3; t++) + { + err=pthread_create (&threads[t], NULL , worker, &tw[t]); + if (err) DOABORT ("pthread_create failed on thread %d with error %d\n", + t, err); + }; + +#ifdef _WIN32 + Sleep (5000); +#else + sleep (5); +#endif + + /* Stop please. */ + __sync_lock_test_and_set (&doquit, 1ll); + + for (t = 0; t < 3; t++) + { + err=pthread_join (threads[t], NULL); + if (err) + DOABORT ("pthread_join failed on thread %d with error %d\n", t, err); + }; + + __sync_synchronize (); + + /* OK, so all the workers have finished - + the workers should have zero'd their workspace, the unused areas + should still be 1. */ + if (!__sync_bool_compare_and_swap (&workspace, 0x040000e0ll, 0)) + DOABORT ("End of run workspace mismatch, got %llx\n", workspace); + + /* All the workers should have done some work. */ + for (t = 0; t < 3; t++) + { + if (tw[t].count == 0) DOABORT ("Worker %d gave 0 count\n", t); + }; + + return 0; +} + |