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/* Copyright (C) 2009 Free Software Foundation, Inc.
This file is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at your option)
any later version.
This file is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with this file; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
/* { dg-do run } */
/* { dg-require-effective-target "ealib" } */
#include <stdlib.h>
#include <string.h>
#include <ea.h>
#include <spu_cache.h>
#ifdef __EA64__
#define addr unsigned long long
#else
#define addr unsigned long
#endif
static __ea void *bigblock;
static __ea void *block;
static int *ls_block;
extern char __cache_tag_array_size[];
#define CACHE_SIZE (4 * (int) &__cache_tag_array_size[0])
#define LINE_SIZE ((addr)128)
void
init_mem (void)
{
bigblock = malloc_ea (CACHE_SIZE + 2 * LINE_SIZE);
block = malloc_ea (2 * LINE_SIZE);
ls_block = malloc (LINE_SIZE);
memset_ea (bigblock, 0, CACHE_SIZE + 2 * LINE_SIZE);
memset_ea (block, -1, 2 * LINE_SIZE);
memset (ls_block, -1, LINE_SIZE);
cache_flush ();
}
/* Test 1: Simple cache fetching. */
void
test1 (void)
{
addr aligned = ((((addr) block) + LINE_SIZE - 1) & -LINE_SIZE);
int *p1 = NULL;
int *p2 = NULL;
int i = 0;
/* First, check if the same addr give the same cache ptr. */
p1 = cache_fetch ((__ea void *) aligned);
p2 = cache_fetch ((__ea void *) aligned);
if (p1 != p2)
abort ();
/* Check that the data actually is in the cache. */
for (i = 0; i < LINE_SIZE / sizeof (int); i++)
{
if (p1[i] != -1)
abort ();
}
/* Check returning within the cache line. */
p2 = cache_fetch ((__ea void *) (aligned + sizeof (int)));
if (p2 - p1 != 1)
abort ();
/* Finally, check that fetching an LS pointer returns that pointer. */
p1 = cache_fetch ((__ea char *) ls_block);
if (p1 != ls_block)
abort ();
}
/* Test 2: Eviction testing. */
void
test2 (void)
{
addr aligned = ((((addr) block) + LINE_SIZE - 1) & -LINE_SIZE);
int *p = NULL;
int i = 0;
/* First check that clean evictions don't write back. */
p = cache_fetch ((__ea void *) aligned);
for (i = 0; i < LINE_SIZE / sizeof (int); i++)
p[i] = 0;
cache_evict ((__ea void *) aligned);
memcpy_ea ((__ea char *) ls_block, (__ea void *) aligned, LINE_SIZE);
for (i = 0; i < LINE_SIZE / sizeof (int); i++)
{
if (ls_block[i] == 0)
abort ();
}
/* Now check that dirty evictions do write back. */
p = cache_fetch_dirty ((__ea void *) aligned, LINE_SIZE);
for (i = 0; i < LINE_SIZE / sizeof (int); i++)
p[i] = 0;
cache_evict ((__ea void *) aligned);
memcpy_ea ((__ea char *) ls_block, (__ea void *) aligned, LINE_SIZE);
for (i = 0; i < LINE_SIZE / sizeof (int); i++)
{
if (ls_block[i] != 0)
abort ();
}
/* Finally, check that non-atomic writeback only writes dirty bytes. */
for (i = 0; i < LINE_SIZE / sizeof (int); i++)
{
p = cache_fetch_dirty ((__ea void *) (aligned + i * sizeof (int)),
(i % 2) * sizeof (int));
p[0] = -1;
}
cache_evict ((__ea void *) aligned);
memcpy_ea ((__ea char *) ls_block, (__ea void *) aligned, LINE_SIZE);
for (i = 0; i < LINE_SIZE / sizeof (int); i++)
{
if ((ls_block[i] == -1) && (i % 2 == 0))
abort ();
if ((ls_block[i] == 0) && (i % 2 == 1))
abort ();
}
}
/* Test LS forced-eviction. */
void
test3 (void)
{
addr aligned = ((((addr) bigblock) + LINE_SIZE - 1) & -LINE_SIZE);
char *test = NULL;
char *ls = NULL;
int i = 0;
/* Init memory, fill the cache to capacity. */
ls = cache_fetch_dirty ((__ea void *) aligned, LINE_SIZE);
for (i = 1; i < (CACHE_SIZE / LINE_SIZE); i++)
cache_fetch_dirty ((__ea void *) (aligned + i * LINE_SIZE), LINE_SIZE);
memset (ls, -1, LINE_SIZE);
test = cache_fetch ((__ea void *) (aligned + CACHE_SIZE));
/* test == ls indicates cache collision. */
if (test != ls)
abort ();
/* Make sure it actually wrote the cache line. */
for (i = 0; i < LINE_SIZE; i++)
{
if (ls[i] != 0)
abort ();
}
ls = cache_fetch ((__ea void *) aligned);
/* test != ls indicates another entry was evicted. */
if (test == ls)
abort ();
/* Make sure that the previous eviction actually wrote back. */
for (i = 0; i < LINE_SIZE; i++)
{
if (ls[i] != 0xFF)
abort ();
}
}
int
main (int argc, char **argv)
{
init_mem ();
test1 ();
test2 ();
test3 ();
return 0;
}
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