diff options
Diffstat (limited to 'test/test/test_reciprocal_division.c')
| -rw-r--r-- | test/test/test_reciprocal_division.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/test/test/test_reciprocal_division.c b/test/test/test_reciprocal_division.c new file mode 100644 index 00000000..8ea9b1d2 --- /dev/null +++ b/test/test/test_reciprocal_division.c @@ -0,0 +1,167 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2017 Cavium, Inc + */ + +#include "test.h" + +#include <stdio.h> +#include <unistd.h> +#include <inttypes.h> + +#include <rte_common.h> +#include <rte_cycles.h> +#include <rte_random.h> +#include <rte_reciprocal.h> + +#define MAX_ITERATIONS (1ULL << 32) +#define DIVIDE_ITER (100) + +static int +test_reciprocal(void) +{ + int result = 0; + uint32_t divisor_u32 = 0; + uint32_t dividend_u32; + uint32_t nresult_u32; + uint32_t rresult_u32; + uint64_t i, j; + uint64_t divisor_u64 = 0; + uint64_t dividend_u64; + uint64_t nresult_u64; + uint64_t rresult_u64; + struct rte_reciprocal reci_u32 = {0}; + struct rte_reciprocal_u64 reci_u64 = {0}; + + rte_srand(rte_rdtsc()); + printf("Validating unsigned 32bit division.\n"); + for (i = 0; i < MAX_ITERATIONS; i++) { + /* Change divisor every DIVIDE_ITER iterations. */ + if (i % DIVIDE_ITER == 0) { + divisor_u32 = rte_rand(); + reci_u32 = rte_reciprocal_value(divisor_u32); + } + + dividend_u32 = rte_rand(); + nresult_u32 = dividend_u32 / divisor_u32; + rresult_u32 = rte_reciprocal_divide(dividend_u32, + reci_u32); + if (nresult_u32 != rresult_u32) { + printf("Division failed, %"PRIu32"/%"PRIu32" = " + "expected %"PRIu32" result %"PRIu32"\n", + dividend_u32, divisor_u32, + nresult_u32, rresult_u32); + result = 1; + break; + } + } + + printf("Validating unsigned 64bit division.\n"); + for (i = 0; i < MAX_ITERATIONS; i++) { + /* Change divisor every DIVIDE_ITER iterations. */ + if (i % DIVIDE_ITER == 0) { + divisor_u64 = rte_rand(); + reci_u64 = rte_reciprocal_value_u64(divisor_u64); + } + + dividend_u64 = rte_rand(); + nresult_u64 = dividend_u64 / divisor_u64; + rresult_u64 = rte_reciprocal_divide_u64(dividend_u64, + &reci_u64); + if (nresult_u64 != rresult_u64) { + printf("Division failed, %"PRIu64"/%"PRIu64" = " + "expected %"PRIu64" result %"PRIu64"\n", + dividend_u64, divisor_u64, + nresult_u64, rresult_u64); + result = 1; + break; + } + } + + printf("Validating unsigned 64bit division with 32bit divisor.\n"); + for (i = 0; i < MAX_ITERATIONS; i++) { + /* Change divisor every DIVIDE_ITER iterations. */ + if (i % DIVIDE_ITER == 0) { + divisor_u64 = rte_rand() >> 32; + reci_u64 = rte_reciprocal_value_u64(divisor_u64); + } + + dividend_u64 = rte_rand(); + + nresult_u64 = dividend_u64 / divisor_u64; + rresult_u64 = rte_reciprocal_divide_u64(dividend_u64, + &reci_u64); + + if (nresult_u64 != rresult_u64) { + printf("Division failed, %"PRIu64"/%"PRIu64" = " + "expected %"PRIu64" result %"PRIu64"\n", + dividend_u64, divisor_u64, + nresult_u64, rresult_u64); + result = 1; + break; + } + } + + printf("Validating division by power of 2.\n"); + for (i = 0; i < 32; i++) { + divisor_u64 = 1ull << i; + reci_u64 = rte_reciprocal_value_u64(divisor_u64); + reci_u32 = rte_reciprocal_value((uint32_t)divisor_u64); + + for (j = 0; j < MAX_ITERATIONS >> 4; j++) { + dividend_u64 = rte_rand(); + + nresult_u64 = dividend_u64 / divisor_u64; + rresult_u64 = rte_reciprocal_divide_u64(dividend_u64, + &reci_u64); + + if (nresult_u64 != rresult_u64) { + printf( + "Division 64 failed, %"PRIu64"/%"PRIu64" = " + "expected %"PRIu64" result %"PRIu64"\n", + dividend_u64, divisor_u64, + nresult_u64, rresult_u64); + result = 1; + } + + nresult_u32 = (dividend_u64 >> 32) / divisor_u64; + rresult_u32 = rte_reciprocal_divide( + (dividend_u64 >> 32), reci_u32); + + if (nresult_u32 != rresult_u32) { + printf( + "Division 32 failed, %"PRIu64"/%"PRIu64" = " + "expected %"PRIu64" result %"PRIu64"\n", + dividend_u64 >> 32, divisor_u64, + nresult_u64, rresult_u64); + result = 1; + break; + } + } + } + + for (; i < 64; i++) { + divisor_u64 = 1ull << i; + reci_u64 = rte_reciprocal_value_u64(divisor_u64); + + for (j = 0; j < MAX_ITERATIONS >> 4; j++) { + dividend_u64 = rte_rand(); + + nresult_u64 = dividend_u64 / divisor_u64; + rresult_u64 = rte_reciprocal_divide_u64(dividend_u64, + &reci_u64); + + if (nresult_u64 != rresult_u64) { + printf("Division failed, %"PRIu64"/%"PRIu64" = " + "expected %"PRIu64" result %"PRIu64"\n", + dividend_u64, divisor_u64, + nresult_u64, rresult_u64); + result = 1; + break; + } + } + } + + return result; +} + +REGISTER_TEST_COMMAND(reciprocal_division, test_reciprocal); |