a9de470cc7
Since all other apps have been moved to the "app" folder, the autotest app remains alone in the test folder. Rather than having an entire top-level folder for this, we can move it back to where it all started in early versions of DPDK - the "app/" folder. This move has a couple of advantages: * This reduces clutter at the top level of the project, due to one less folder. * It eliminates the separate build task necessary for building the autotests using make "make test-build" which means that developers are less likely to miss something in their own compilation tests * It re-aligns the final location of the test binary in the app folder when building with make with it's location in the source tree. For meson builds, the autotest app is different from the other apps in that it needs a series of different test cases defined for it for use by "meson test". Therefore, it does not get built as part of the main loop in the app folder, but gets built separately at the end. Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
168 lines
4.2 KiB
C
168 lines
4.2 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2017 Cavium, Inc
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*/
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#include "test.h"
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#include <stdio.h>
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#include <unistd.h>
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#include <inttypes.h>
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#include <rte_common.h>
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#include <rte_cycles.h>
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#include <rte_random.h>
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#include <rte_reciprocal.h>
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#define MAX_ITERATIONS (1ULL << 32)
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#define DIVIDE_ITER (100)
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static int
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test_reciprocal(void)
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{
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int result = 0;
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uint32_t divisor_u32 = 0;
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uint32_t dividend_u32;
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uint32_t nresult_u32;
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uint32_t rresult_u32;
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uint64_t i, j;
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uint64_t divisor_u64 = 0;
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uint64_t dividend_u64;
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uint64_t nresult_u64;
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uint64_t rresult_u64;
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struct rte_reciprocal reci_u32 = {0};
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struct rte_reciprocal_u64 reci_u64 = {0};
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rte_srand(rte_rdtsc());
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printf("Validating unsigned 32bit division.\n");
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for (i = 0; i < MAX_ITERATIONS; i++) {
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/* Change divisor every DIVIDE_ITER iterations. */
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if (i % DIVIDE_ITER == 0) {
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divisor_u32 = rte_rand();
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reci_u32 = rte_reciprocal_value(divisor_u32);
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}
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dividend_u32 = rte_rand();
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nresult_u32 = dividend_u32 / divisor_u32;
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rresult_u32 = rte_reciprocal_divide(dividend_u32,
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reci_u32);
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if (nresult_u32 != rresult_u32) {
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printf("Division failed, %"PRIu32"/%"PRIu32" = "
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"expected %"PRIu32" result %"PRIu32"\n",
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dividend_u32, divisor_u32,
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nresult_u32, rresult_u32);
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result = 1;
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break;
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}
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}
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printf("Validating unsigned 64bit division.\n");
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for (i = 0; i < MAX_ITERATIONS; i++) {
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/* Change divisor every DIVIDE_ITER iterations. */
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if (i % DIVIDE_ITER == 0) {
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divisor_u64 = rte_rand();
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reci_u64 = rte_reciprocal_value_u64(divisor_u64);
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}
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dividend_u64 = rte_rand();
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nresult_u64 = dividend_u64 / divisor_u64;
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rresult_u64 = rte_reciprocal_divide_u64(dividend_u64,
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&reci_u64);
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if (nresult_u64 != rresult_u64) {
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printf("Division failed, %"PRIu64"/%"PRIu64" = "
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"expected %"PRIu64" result %"PRIu64"\n",
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dividend_u64, divisor_u64,
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nresult_u64, rresult_u64);
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result = 1;
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break;
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}
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}
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printf("Validating unsigned 64bit division with 32bit divisor.\n");
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for (i = 0; i < MAX_ITERATIONS; i++) {
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/* Change divisor every DIVIDE_ITER iterations. */
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if (i % DIVIDE_ITER == 0) {
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divisor_u64 = rte_rand() >> 32;
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reci_u64 = rte_reciprocal_value_u64(divisor_u64);
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}
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dividend_u64 = rte_rand();
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nresult_u64 = dividend_u64 / divisor_u64;
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rresult_u64 = rte_reciprocal_divide_u64(dividend_u64,
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&reci_u64);
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if (nresult_u64 != rresult_u64) {
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printf("Division failed, %"PRIu64"/%"PRIu64" = "
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"expected %"PRIu64" result %"PRIu64"\n",
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dividend_u64, divisor_u64,
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nresult_u64, rresult_u64);
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result = 1;
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break;
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}
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}
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printf("Validating division by power of 2.\n");
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for (i = 0; i < 32; i++) {
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divisor_u64 = 1ull << i;
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reci_u64 = rte_reciprocal_value_u64(divisor_u64);
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reci_u32 = rte_reciprocal_value((uint32_t)divisor_u64);
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for (j = 0; j < MAX_ITERATIONS >> 4; j++) {
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dividend_u64 = rte_rand();
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nresult_u64 = dividend_u64 / divisor_u64;
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rresult_u64 = rte_reciprocal_divide_u64(dividend_u64,
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&reci_u64);
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if (nresult_u64 != rresult_u64) {
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printf(
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"Division 64 failed, %"PRIu64"/%"PRIu64" = "
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"expected %"PRIu64" result %"PRIu64"\n",
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dividend_u64, divisor_u64,
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nresult_u64, rresult_u64);
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result = 1;
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}
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nresult_u32 = (dividend_u64 >> 32) / divisor_u64;
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rresult_u32 = rte_reciprocal_divide(
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(dividend_u64 >> 32), reci_u32);
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if (nresult_u32 != rresult_u32) {
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printf(
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"Division 32 failed, %"PRIu64"/%"PRIu64" = "
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"expected %"PRIu64" result %"PRIu64"\n",
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dividend_u64 >> 32, divisor_u64,
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nresult_u64, rresult_u64);
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result = 1;
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break;
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}
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}
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}
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for (; i < 64; i++) {
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divisor_u64 = 1ull << i;
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reci_u64 = rte_reciprocal_value_u64(divisor_u64);
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for (j = 0; j < MAX_ITERATIONS >> 4; j++) {
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dividend_u64 = rte_rand();
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nresult_u64 = dividend_u64 / divisor_u64;
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rresult_u64 = rte_reciprocal_divide_u64(dividend_u64,
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&reci_u64);
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if (nresult_u64 != rresult_u64) {
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printf("Division failed, %"PRIu64"/%"PRIu64" = "
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"expected %"PRIu64" result %"PRIu64"\n",
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dividend_u64, divisor_u64,
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nresult_u64, rresult_u64);
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result = 1;
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break;
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}
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}
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}
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return result;
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}
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REGISTER_TEST_COMMAND(reciprocal_division, test_reciprocal);
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