diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/library.at | 5 | ||||
| -rw-r--r-- | tests/test-util.c | 42 |
2 files changed, 46 insertions, 1 deletions
diff --git a/tests/library.at b/tests/library.at index a30d362e3..ecb9268d4 100644 --- a/tests/library.at +++ b/tests/library.at @@ -231,6 +231,11 @@ AT_CHECK([sed 's/.*: // AT_CLEANUP +AT_SETUP([saturating arithmetic]) +AT_KEYWORDS([sat math sat_math]) +AT_CHECK([ovstest test-util sat_math]) +AT_CLEANUP + AT_SETUP([snprintf]) AT_CHECK([ovstest test-util snprintf]) AT_CLEANUP diff --git a/tests/test-util.c b/tests/test-util.c index 9222355ec..f0fd04210 100644 --- a/tests/test-util.c +++ b/tests/test-util.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2011, 2012, 2013, 2014, 2015, 2016 Nicira, Inc. + * Copyright (c) 2011, 2012, 2013, 2014, 2015, 2016, 2019 Nicira, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -27,6 +27,7 @@ #include "command-line.h" #include "ovstest.h" #include "random.h" +#include "sat-math.h" #include "openvswitch/vlog.h" static void @@ -1138,6 +1139,44 @@ test_snprintf(struct ovs_cmdl_context *ctx OVS_UNUSED) ovs_assert(snprintf(NULL, 0, "abcde") == 5); } +static void +check_sat(long long int x, long long int y, const char *op, + long long int r_a, long long int r_b) +{ + if (r_a != r_b) { + fprintf(stderr, "%lld %s %lld saturates differently: %lld vs %lld\n", + x, op, y, r_a, r_b); + abort(); + } +} + +static void +test_sat_math(struct ovs_cmdl_context *ctx OVS_UNUSED) +{ + long long int values[] = { + LLONG_MIN, LLONG_MIN + 1, LLONG_MIN + 2, LLONG_MIN + 3, + LLONG_MIN + 4, LLONG_MIN + 5, LLONG_MIN + 6, LLONG_MIN + 7, + LLONG_MIN / 2, LLONG_MIN / 3, LLONG_MIN / 4, LLONG_MIN / 5, + -1000, -50, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, + 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 50, 1000, + LLONG_MAX / 5, LLONG_MAX / 4, LLONG_MAX / 3, LLONG_MAX / 2, + LLONG_MAX - 7, LLONG_MAX - 6, LLONG_MAX - 5, LLONG_MAX - 4, + LLONG_MAX - 3, LLONG_MAX - 2, LLONG_MAX - 1, LLONG_MAX, + }; + + /* Compare the behavior of our local implementation of these functions + * against the compiler implementation or its fallback. (If the fallback + * is in use then this is comparing the fallback to itself, so this test is + * only really useful if the compiler has an implementation.) */ + for (long long int *x = values; x < values + ARRAY_SIZE(values); x++) { + for (long long int *y = values; y < values + ARRAY_SIZE(values); y++) { + check_sat(*x, *y, "+", llsat_add(*x, *y), llsat_add__(*x, *y)); + check_sat(*x, *y, "-", llsat_sub(*x, *y), llsat_sub__(*x, *y)); + check_sat(*x, *y, "*", llsat_mul(*x, *y), llsat_mul__(*x, *y)); + } + } +} + #ifndef _WIN32 static void test_file_name(struct ovs_cmdl_context *ctx) @@ -1174,6 +1213,7 @@ static const struct ovs_cmdl_command commands[] = { {"assert", NULL, 0, 0, test_assert, OVS_RO}, {"ovs_scan", NULL, 0, 0, test_ovs_scan, OVS_RO}, {"snprintf", NULL, 0, 0, test_snprintf, OVS_RO}, + {"sat_math", NULL, 0, 0, test_sat_math, OVS_RO}, #ifndef _WIN32 {"file_name", NULL, 1, INT_MAX, test_file_name, OVS_RO}, #endif |