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/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2005 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2011 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2013 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2018 Amazon.com, Inc. or its affiliates. All Rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "opal_config.h"
#include <stdio.h>
#include <string.h>
#include "support.h"
#include "opal/util/bit_ops.h"
#include "opal/util/output.h"
#include "opal/util/printf.h"
/*
#define DEBUG
*/
static int test_hibit(int value, int start);
static int test_cube_dim(int value);
static int test_next_poweroftwo(int value);
static int test_next_poweroftwo_inclusive(int value);
int main(int argc, char* argv[])
{
int i;
int vals[] = {0, 1, 2, 3, 4, 5, 127, 128, 129, (1 << 29) -1, (1 << 29), (1 << 29) +1, (1 << 30) -1, (1 << 30) /* And NOT (1 << 30) +1 */};
test_init("opal_bit_ops()");
#ifdef DEBUG
printf ("Test usage: ./opal_bit_ops [VALUES]\n");
#endif
if (1 < argc) {
for (i = 1; i < argc; i++) {
int value;
value = atoi (argv[i]);
printf ("Testing %d. argument test_next_poweroftwo(%d): %s\n",
i, value, test_next_poweroftwo(value) ? "correct" : "wrong");
}
}
for (i = 0; i < (int)(sizeof(vals)/sizeof(vals[0])); i++) {
test_hibit (vals[i], 8 * sizeof(int) -2);
test_hibit (vals[i], 3);
test_cube_dim (vals[i]);
test_next_poweroftwo (vals[i]);
test_next_poweroftwo_inclusive (vals[i]);
}
/* All done */
return test_finalize();
}
/* REFERENCE FUNCTION */
static int hibit(int value, int start)
{
unsigned int mask;
--start;
mask = 1 << start;
for (; start >= 0; --start, mask >>= 1) {
if (value & mask) {
break;
}
}
return start;
}
static int test_hibit(int value, int start)
{
int out;
int bit = hibit (value, start);
#ifdef DEBUG
printf ("test_hibit(): value:%d expect:%d\n",
value, bit);
#endif
if (bit == (out = opal_hibit (value, start))) {
test_success();
return 1;
} else {
char * msg;
opal_asprintf(&msg, "Mismatch for hibit (w/ start:%d): value:%d, expected:%d got:%d\n",
start, value, bit, out);
test_failure(msg);
free(msg);
}
return 0;
}
/* REFERENCE FUNCTION */
static int cube_dim(int value)
{
int dim, size;
for (dim = 0, size = 1; size < value; ++dim, size <<= 1);
return dim;
}
static int test_cube_dim(int value)
{
int out;
int dim = cube_dim (value);
#ifdef DEBUG
printf ("test_cube_dim(): value:%d expect:%d\n",
value, dim);
#endif
if (dim == (out = opal_cube_dim (value))) {
test_success();
return 1;
} else {
char * msg;
opal_asprintf(&msg, "Mismatch for cube_dim: value:%d, expected:%d got:%d\n",
value, dim, out);
test_failure(msg);
free(msg);
}
return 0;
}
/* REFERENCE FUNCTION */
static int next_poweroftwo(int value)
{
int power2;
for (power2 = 1; value; value >>=1, power2 <<=1) /* empty */;
return power2;
}
static int test_next_poweroftwo(int value)
{
int out;
int power2 = next_poweroftwo (value);
#ifdef DEBUG
printf ("test_next_poweroftwo(): value:%d expect:%d\n",
value, power2);
#endif
if (power2 == (out = opal_next_poweroftwo (value))) {
test_success();
return 1;
} else {
char * msg;
opal_asprintf(&msg, "Mismatch for power-of-two: value:%d, expected:%d got:%d\n",
value, power2, out);
test_failure(msg);
free(msg);
}
return 0;
}
/* REFERENCE FUNCTION */
static int next_poweroftwo_inclusive(int value)
{
int power2 = 1;
while ( power2 < value )
power2 <<= 1;
return power2;
}
static int test_next_poweroftwo_inclusive(int value)
{
int out;
int power2 = next_poweroftwo_inclusive (value);
#ifdef DEBUG
printf ("test_next_poweroftwo(): value:%d expect:%d\n",
value, power2);
#endif
if (power2 == (out = opal_next_poweroftwo_inclusive (value))) {
test_success();
return 1;
} else {
char * msg;
opal_asprintf(&msg, "Mismatch for power-of-two-inclusive: value:%d, expected:%d got:%d\n",
value, power2, out);
test_failure(msg);
free(msg);
}
return 0;
}
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