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/*
* Copyright (c) 2016, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "rose/validate_mask.h"
#include "gtest/gtest.h"
#define ONES64 0xffffffffffffffffULL
/* valid_data_mask is flexible, don't need to be fixed in Info */
struct ValidateMaskTestInfo {
u64a data;
u64a and_mask;
u64a cmp_mask;
u64a neg_mask;
};
static const ValidateMaskTestInfo testBasic[] = {
/* data is randomly picked */
{0x1234abcd4321dcbaULL, 0xff09bbdd7f7ffeffULL,
0x1200abcd4561dcbbULL, 0xffff00ffULL},
/* data = "VaLiDaTe" */
{0x56614c6944615465ULL, 0xe0feffffdf7b5480ULL,
0x40614c6946615400ULL, 0xff0000ff000000ULL},
/* data = "\0\0\0MASK\0" */
{0x4d41534b00ULL, 0xfffffefebfdf002cULL,
0x5536344c0173002cULL, 0xffffff0000ff00ffULL},
/* data = "FOo14foo" */
{0x464f6f3134666f6fULL, 0xdfdffffef8c0f000ULL,
0x46466f3030406000ULL, 0xff000000000000ULL},
/* data = "FOo14foo" with different cmp_mask and neg_mask*/
{0x464f6f3134666f6fULL, 0xdfdffffef8c0f000ULL,
0x44464f3034606f60ULL, 0xffffff00ffffffffULL},
};
/*
* generate 37 different valid_data_mask
* 8 from 0xff to 0xff00000000000000
* 7 from 0xffff to 0xffff000000000000
* ...
* 0xffffffffffffffff and 0
*/
static int initLegalValidMasks(u64a validMasks[]) {
u64a data = ONES64;
int num = 0;
for (int i = 0; i < 64; i += 8) {
for (int j = 0; j <= i; j += 8) {
validMasks[num] = data << j;
num++;
}
data >>= 8;
}
validMasks[num] = 0;
num++;
return num;
}
/*
* generate all 256 neg_masks
* including 0, 0xff, 0xff00,..., 0xffffffffffffffff
*/
static int initLegalNegMasks(u64a negMasks[]) {
u64a data = 0;
u64a offset;
int num = 0;
while (data != ONES64) {
negMasks[num] = data;
num++;
offset = (data | (data +1)) ^ data;
data += 0xfeULL * offset + 1;
}
negMasks[num] = data;
num++;
return num;
}
/*
* check all legal valid_mask(37 different) for validateMask[]
*/
TEST(ValidateMask, ValidMaskTests) {
u64a validMasks[256];
int num = initLegalValidMasks(validMasks);
for (const auto &t : testBasic) {
for (int i = 0; i < num; i++) {
EXPECT_EQ(1, validateMask(t.data,
validMasks[i],
t.and_mask,
t.cmp_mask,
t.neg_mask));
}
}
}
/*
* fix neg_mask to 0 and ONES64,
* check output of ValidateMask on different valid_mask,
* for neg_mask = 0,
*/
TEST(ValidateMask, AdvancedValidMaskTests) {
u64a validMasks[256];
int num = initLegalValidMasks(validMasks);
int bool_result;
for (const auto &t: testBasic) {
for (int i = 0; i < num; i++) {
bool_result = !(validMasks[i] & t.neg_mask);
EXPECT_EQ(bool_result, validateMask(t.data,
validMasks[i],
t.and_mask,
t.cmp_mask,
0));
bool_result = (validMasks[i] | t.neg_mask) == t.neg_mask;
EXPECT_EQ(bool_result, validateMask(t.data,
validMasks[i],
t.and_mask,
t.cmp_mask,
ONES64));
}
}
}
/*
* test every pair of valid_data_mask and neg_mask
* and compute the expect output by a formula
*/
TEST(ValidateMask, FullTests) {
u64a validMasks[256];
u64a negMasks[256];
int vm_num = initLegalValidMasks(validMasks);
int nm_num = initLegalNegMasks(negMasks);
int bool_result;
for (const auto &t: testBasic) {
for (int i = 0; i < vm_num; i++) {
for (int j = 0; j < nm_num; j++) {
/*
* treat t.neg_mask as a truthtable (a negative truthtable)
* we expect validateMask output 1 if and only if
* the truthtable(tt) and neg_mask(nm) looks same
* under "&" operation with valid_data_mask(vdm)
* that is
* output = (tt & vdm) == (nm & vdm) ? 1 : 0;
*/
bool_result = (t.neg_mask & validMasks[i]) ==
(negMasks[j] & validMasks[i]);
EXPECT_EQ(bool_result, validateMask(t.data,
validMasks[i],
t.and_mask,
t.cmp_mask,
negMasks[j]));
}
}
}
}
/*
* drop the original validateMask[].neg_mask
* and test more neg_mask and valid_mask manually
*/
TEST(ValidateMask, ManualTest_0) {
const auto &t = testBasic[0];
EXPECT_EQ(1, validateMask(t.data, ONES64 << 8,
t.and_mask, t.cmp_mask, 0xffff0000ULL));
EXPECT_EQ(1, validateMask(t.data, (ONES64 << 16) >> 8,
t.and_mask, t.cmp_mask, 0xffff0000ULL));
EXPECT_EQ(1, validateMask(t.data, ONES64 << 16,
t.and_mask, t.cmp_mask, 0xffffff00ULL));
EXPECT_EQ(1, validateMask(t.data, ONES64 << 24,
t.and_mask, t.cmp_mask, 0xff00ffffULL));
EXPECT_EQ(1, validateMask(t.data, ONES64 >> 32,
t.and_mask, t.cmp_mask, 0xffffffff00ffULL));
EXPECT_EQ(1, validateMask(t.data, ONES64 >> 40,
t.and_mask, t.cmp_mask, 0xff00ffULL));
EXPECT_EQ(1, validateMask(t.data, 0,
t.and_mask, t.cmp_mask, ONES64));
EXPECT_EQ(1, validateMask(t.data, 0,
t.and_mask, t.cmp_mask, ~t.neg_mask));
EXPECT_EQ(0, validateMask(t.data, ONES64 << 16,
t.and_mask, t.cmp_mask, 0xff0000ffULL));
EXPECT_EQ(0, validateMask(t.data, ONES64,
t.and_mask, t.cmp_mask, 0xffff0000ULL));
EXPECT_EQ(0, validateMask(t.data, ONES64 >> 32,
t.and_mask, t.cmp_mask, 0xff00ffULL));
EXPECT_EQ(0, validateMask(t.data, ONES64 << 8,
t.and_mask, t.cmp_mask, 0xffffffffULL));
EXPECT_EQ(0, validateMask(t.data, ONES64 << 16,
t.and_mask, t.cmp_mask, 0xff0000ffULL));
}
TEST(ValidateMask, ManualTest_1) {
const auto &t = testBasic[1];
EXPECT_EQ(1, validateMask(t.data, ONES64 << 16,
t.and_mask, t.cmp_mask, 0xff0000ff00ffffULL));
EXPECT_EQ(1, validateMask(t.data, ONES64 << 32,
t.and_mask, t.cmp_mask, 0xff000000000000ULL));
EXPECT_EQ(1, validateMask(t.data, ONES64 << 32,
t.and_mask, t.cmp_mask, 0xff0000ffff00ffULL));
EXPECT_EQ(1, validateMask(t.data, ONES64 << 56,
t.and_mask, t.cmp_mask, 0));
EXPECT_EQ(1, validateMask(t.data, ONES64 >> 8,
t.and_mask, t.cmp_mask, 0xffff0000ff000000ULL));
EXPECT_EQ(1, validateMask(t.data, ONES64 >> 16,
t.and_mask, t.cmp_mask, 0xff000000ULL));
EXPECT_EQ(1, validateMask(t.data, (ONES64 << 32) >> 16,
t.and_mask, t.cmp_mask, 0xff00ff00));
EXPECT_EQ(1, validateMask(t.data, ONES64 >> 40,
t.and_mask, t.cmp_mask, 0xff00000000ULL));
EXPECT_EQ(0, validateMask(t.data, ONES64,
t.and_mask, t.cmp_mask, 0));
EXPECT_EQ(0, validateMask(t.data, ONES64 << 48,
t.and_mask, t.cmp_mask, 0));
EXPECT_EQ(0, validateMask(t.data, ONES64 << 56,
t.and_mask, t.cmp_mask, 0xff00000000000000ULL));
EXPECT_EQ(0, validateMask(t.data, ONES64 << 16,
t.and_mask, t.cmp_mask, 0xff0000ffff0000ULL));
EXPECT_EQ(0, validateMask(t.data, ONES64 >> 8,
t.and_mask, t.cmp_mask, 0xff000000ULL));
EXPECT_EQ(0, validateMask(t.data, ONES64 >> 16,
t.and_mask, t.cmp_mask, 0xffff000000ULL));
EXPECT_EQ(0, validateMask(t.data, (ONES64 << 40) >> 16,
t.and_mask, t.cmp_mask, 0xff000000000000ULL));
EXPECT_EQ(0, validateMask(t.data, ONES64 << 8,
t.and_mask, t.cmp_mask, ONES64));
}
TEST(ValidateMask, ManualTest_2) {
const auto &t = testBasic[2];
EXPECT_EQ(1, validateMask(t.data, ONES64 << 24,
t.and_mask, t.cmp_mask, 0xffffff0000000000ULL));
EXPECT_EQ(1, validateMask(t.data, ONES64 << 56,
t.and_mask, t.cmp_mask, 0xff00000000000000ULL));
EXPECT_EQ(1, validateMask(t.data, ONES64 << 56,
t.and_mask, t.cmp_mask, 0xff00ffffff00ffffULL));
EXPECT_EQ(1, validateMask(t.data, 0,
t.and_mask, t.cmp_mask, ONES64));
EXPECT_EQ(1, validateMask(t.data, ONES64 >> 24,
t.and_mask, t.cmp_mask, 0xff00ffULL));
EXPECT_EQ(1, validateMask(t.data, ONES64 >> 32,
t.and_mask, t.cmp_mask, 0xffff00ff00ffULL));
EXPECT_EQ(1, validateMask(t.data, (ONES64 << 32) >> 24,
t.and_mask, t.cmp_mask, 0xff0000ULL));
EXPECT_EQ(1, validateMask(t.data, (ONES64 << 32) >> 24,
t.and_mask, t.cmp_mask, 0xff00ffULL));
EXPECT_EQ(1, validateMask(t.data, (ONES64 << 56) >> 40,
t.and_mask, t.cmp_mask, 0xff0000ULL));
EXPECT_EQ(1, validateMask(t.data, (ONES64 << 56) >> 32,
t.and_mask, t.cmp_mask, 0));
EXPECT_EQ(1, validateMask(t.data, ONES64 >> 40,
t.and_mask, t.cmp_mask, 0xffffffff00ffULL));
EXPECT_EQ(0, validateMask(t.data, ONES64,
t.and_mask, t.cmp_mask, 0));
EXPECT_EQ(0, validateMask(t.data, ONES64,
t.and_mask, t.cmp_mask, ONES64));
EXPECT_EQ(0, validateMask(t.data, ONES64 << 56,
t.and_mask, t.cmp_mask, 0));
EXPECT_EQ(0, validateMask(t.data, ONES64 << 48,
t.and_mask, t.cmp_mask, 0xff00000000000000ULL));
EXPECT_EQ(0, validateMask(t.data, ONES64 << 8,
t.and_mask, t.cmp_mask, 0xffffff00000000ffULL));
EXPECT_EQ(0, validateMask(t.data, ONES64 >> 32,
t.and_mask, t.cmp_mask, 0xffff00ULL));
EXPECT_EQ(0, validateMask(t.data, ONES64 >> 32,
t.and_mask, t.cmp_mask, 0xffffffULL));
EXPECT_EQ(0, validateMask(t.data, ONES64 >> 16,
t.and_mask, t.cmp_mask, 0xff00ffULL));
EXPECT_EQ(0, validateMask(t.data, (ONES64 << 32) >> 24,
t.and_mask, t.cmp_mask, 0));
EXPECT_EQ(0, validateMask(t.data, (ONES64 << 32) >> 24,
t.and_mask, t.cmp_mask, 0xffffff00000000ffULL));
EXPECT_EQ(0, validateMask(t.data, (ONES64 << 32) >> 24,
t.and_mask, t.cmp_mask, 0xffffff000000ff00ULL));
EXPECT_EQ(0, validateMask(t.data, (ONES64 << 56) >> 40,
t.and_mask, t.cmp_mask, 0));
EXPECT_EQ(0, validateMask(t.data, (ONES64 << 56) >> 48,
t.and_mask, t.cmp_mask, 0xff00ULL));
}
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