--- a/hotspot/src/share/vm/utilities/bitMap.cpp Fri Aug 19 20:38:30 2016 +0200
+++ b/hotspot/src/share/vm/utilities/bitMap.cpp Sun Aug 14 21:19:42 2016 -0400
@@ -376,77 +376,99 @@
par_put_range_within_word(bit_index(end_full_word), end, value);
}
+inline bm_word_t tail_mask(idx_t tail_bits) {
+ assert(tail_bits != 0, "precondition"); // Works, but shouldn't be called.
+ assert(tail_bits < (idx_t)BitsPerWord, "precondition");
+ return (bm_word_t(1) << tail_bits) - 1;
+}
+
+// Get the low tail_bits of value, which is the last partial word of a map.
+inline bm_word_t tail_of_map(bm_word_t value, idx_t tail_bits) {
+ return value & tail_mask(tail_bits);
+}
+
+// Compute the new last word of a map with a non-aligned length.
+// new_value has the new trailing bits of the map in the low tail_bits.
+// old_value is the last word of the map, including bits beyond the end.
+// Returns old_value with the low tail_bits replaced by the corresponding
+// bits in new_value.
+inline bm_word_t merge_tail_of_map(bm_word_t new_value,
+ bm_word_t old_value,
+ idx_t tail_bits) {
+ bm_word_t mask = tail_mask(tail_bits);
+ return (new_value & mask) | (old_value & ~mask);
+}
+
bool BitMap::contains(const BitMap& other) const {
assert(size() == other.size(), "must have same size");
const bm_word_t* dest_map = map();
const bm_word_t* other_map = other.map();
- idx_t size = size_in_words();
- for (idx_t index = 0; index < size_in_words(); index++) {
- bm_word_t word_union = dest_map[index] | other_map[index];
- // If this has more bits set than dest_map[index], then other is not a
- // subset.
- if (word_union != dest_map[index]) return false;
+ idx_t limit = word_index(size());
+ for (idx_t index = 0; index < limit; ++index) {
+ // false if other bitmap has bits set which are clear in this bitmap.
+ if ((~dest_map[index] & other_map[index]) != 0) return false;
}
- return true;
+ idx_t rest = bit_in_word(size());
+ // true unless there is a partial-word tail in which the other
+ // bitmap has bits set which are clear in this bitmap.
+ return (rest == 0) || tail_of_map(~dest_map[limit] & other_map[limit], rest) == 0;
}
bool BitMap::intersects(const BitMap& other) const {
assert(size() == other.size(), "must have same size");
const bm_word_t* dest_map = map();
const bm_word_t* other_map = other.map();
- idx_t size = size_in_words();
- for (idx_t index = 0; index < size_in_words(); index++) {
+ idx_t limit = word_index(size());
+ for (idx_t index = 0; index < limit; ++index) {
if ((dest_map[index] & other_map[index]) != 0) return true;
}
- // Otherwise, no intersection.
- return false;
+ idx_t rest = bit_in_word(size());
+ // false unless there is a partial-word tail with non-empty intersection.
+ return (rest > 0) && tail_of_map(dest_map[limit] & other_map[limit], rest) != 0;
}
void BitMap::set_union(const BitMap& other) {
assert(size() == other.size(), "must have same size");
bm_word_t* dest_map = map();
const bm_word_t* other_map = other.map();
- idx_t size = size_in_words();
- for (idx_t index = 0; index < size_in_words(); index++) {
- dest_map[index] = dest_map[index] | other_map[index];
+ idx_t limit = word_index(size());
+ for (idx_t index = 0; index < limit; ++index) {
+ dest_map[index] |= other_map[index];
+ }
+ idx_t rest = bit_in_word(size());
+ if (rest > 0) {
+ bm_word_t orig = dest_map[limit];
+ dest_map[limit] = merge_tail_of_map(orig | other_map[limit], orig, rest);
}
}
-
void BitMap::set_difference(const BitMap& other) {
assert(size() == other.size(), "must have same size");
bm_word_t* dest_map = map();
const bm_word_t* other_map = other.map();
- idx_t size = size_in_words();
- for (idx_t index = 0; index < size_in_words(); index++) {
- dest_map[index] = dest_map[index] & ~(other_map[index]);
+ idx_t limit = word_index(size());
+ for (idx_t index = 0; index < limit; ++index) {
+ dest_map[index] &= ~other_map[index];
+ }
+ idx_t rest = bit_in_word(size());
+ if (rest > 0) {
+ bm_word_t orig = dest_map[limit];
+ dest_map[limit] = merge_tail_of_map(orig & ~other_map[limit], orig, rest);
}
}
-
void BitMap::set_intersection(const BitMap& other) {
assert(size() == other.size(), "must have same size");
bm_word_t* dest_map = map();
const bm_word_t* other_map = other.map();
- idx_t size = size_in_words();
- for (idx_t index = 0; index < size; index++) {
- dest_map[index] = dest_map[index] & other_map[index];
+ idx_t limit = word_index(size());
+ for (idx_t index = 0; index < limit; ++index) {
+ dest_map[index] &= other_map[index];
}
-}
-
-
-void BitMap::set_intersection_at_offset(const BitMap& other, idx_t offset) {
- assert(other.size() >= offset, "offset not in range");
- assert(other.size() - offset >= size(), "other not large enough");
- // XXX Ideally, we would remove this restriction.
- guarantee((offset % (sizeof(bm_word_t) * BitsPerByte)) == 0,
- "Only handle aligned cases so far.");
- bm_word_t* dest_map = map();
- const bm_word_t* other_map = other.map();
- idx_t offset_word_ind = word_index(offset);
- idx_t size = size_in_words();
- for (idx_t index = 0; index < size; index++) {
- dest_map[index] = dest_map[index] & other_map[offset_word_ind + index];
+ idx_t rest = bit_in_word(size());
+ if (rest > 0) {
+ bm_word_t orig = dest_map[limit];
+ dest_map[limit] = merge_tail_of_map(orig & other_map[limit], orig, rest);
}
}
@@ -455,88 +477,111 @@
bool changed = false;
bm_word_t* dest_map = map();
const bm_word_t* other_map = other.map();
- idx_t size = size_in_words();
- for (idx_t index = 0; index < size; index++) {
- idx_t temp = dest_map[index] | other_map[index];
- changed = changed || (temp != dest_map[index]);
+ idx_t limit = word_index(size());
+ for (idx_t index = 0; index < limit; ++index) {
+ bm_word_t orig = dest_map[index];
+ bm_word_t temp = orig | other_map[index];
+ changed = changed || (temp != orig);
dest_map[index] = temp;
}
+ idx_t rest = bit_in_word(size());
+ if (rest > 0) {
+ bm_word_t orig = dest_map[limit];
+ bm_word_t temp = merge_tail_of_map(orig | other_map[limit], orig, rest);
+ changed = changed || (temp != orig);
+ dest_map[limit] = temp;
+ }
return changed;
}
-
bool BitMap::set_difference_with_result(const BitMap& other) {
assert(size() == other.size(), "must have same size");
bool changed = false;
bm_word_t* dest_map = map();
const bm_word_t* other_map = other.map();
- idx_t size = size_in_words();
- for (idx_t index = 0; index < size; index++) {
- bm_word_t temp = dest_map[index] & ~(other_map[index]);
- changed = changed || (temp != dest_map[index]);
+ idx_t limit = word_index(size());
+ for (idx_t index = 0; index < limit; ++index) {
+ bm_word_t orig = dest_map[index];
+ bm_word_t temp = orig & ~other_map[index];
+ changed = changed || (temp != orig);
dest_map[index] = temp;
}
+ idx_t rest = bit_in_word(size());
+ if (rest > 0) {
+ bm_word_t orig = dest_map[limit];
+ bm_word_t temp = merge_tail_of_map(orig & ~other_map[limit], orig, rest);
+ changed = changed || (temp != orig);
+ dest_map[limit] = temp;
+ }
return changed;
}
-
bool BitMap::set_intersection_with_result(const BitMap& other) {
assert(size() == other.size(), "must have same size");
bool changed = false;
bm_word_t* dest_map = map();
const bm_word_t* other_map = other.map();
- idx_t size = size_in_words();
- for (idx_t index = 0; index < size; index++) {
+ idx_t limit = word_index(size());
+ for (idx_t index = 0; index < limit; ++index) {
bm_word_t orig = dest_map[index];
bm_word_t temp = orig & other_map[index];
changed = changed || (temp != orig);
- dest_map[index] = temp;
+ dest_map[index] = temp;
+ }
+ idx_t rest = bit_in_word(size());
+ if (rest > 0) {
+ bm_word_t orig = dest_map[limit];
+ bm_word_t temp = merge_tail_of_map(orig & other_map[limit], orig, rest);
+ changed = changed || (temp != orig);
+ dest_map[limit] = temp;
}
return changed;
}
-
void BitMap::set_from(const BitMap& other) {
assert(size() == other.size(), "must have same size");
bm_word_t* dest_map = map();
const bm_word_t* other_map = other.map();
- idx_t size = size_in_words();
- for (idx_t index = 0; index < size; index++) {
- dest_map[index] = other_map[index];
+ idx_t copy_words = word_index(size());
+ Copy::disjoint_words((HeapWord*)other_map, (HeapWord*)dest_map, copy_words);
+ idx_t rest = bit_in_word(size());
+ if (rest > 0) {
+ dest_map[copy_words] = merge_tail_of_map(other_map[copy_words],
+ dest_map[copy_words],
+ rest);
}
}
-
-bool BitMap::is_same(const BitMap& other) {
+bool BitMap::is_same(const BitMap& other) const {
assert(size() == other.size(), "must have same size");
- bm_word_t* dest_map = map();
+ const bm_word_t* dest_map = map();
const bm_word_t* other_map = other.map();
- idx_t size = size_in_words();
- for (idx_t index = 0; index < size; index++) {
+ idx_t limit = word_index(size());
+ for (idx_t index = 0; index < limit; ++index) {
if (dest_map[index] != other_map[index]) return false;
}
- return true;
+ idx_t rest = bit_in_word(size());
+ return (rest == 0) || (tail_of_map(dest_map[limit] ^ other_map[limit], rest) == 0);
}
bool BitMap::is_full() const {
- const bm_word_t* word = map();
- idx_t rest = size();
- for (; rest >= (idx_t) BitsPerWord; rest -= BitsPerWord) {
- if (*word != ~(bm_word_t)0) return false;
- word++;
+ const bm_word_t* words = map();
+ idx_t limit = word_index(size());
+ for (idx_t index = 0; index < limit; ++index) {
+ if (~words[index] != 0) return false;
}
- return rest == 0 || (*word | ~right_n_bits((int)rest)) == ~(bm_word_t)0;
+ idx_t rest = bit_in_word(size());
+ return (rest == 0) || (tail_of_map(~words[limit], rest) == 0);
}
-
bool BitMap::is_empty() const {
- const bm_word_t* word = map();
- idx_t rest = size();
- for (; rest >= (idx_t) BitsPerWord; rest -= BitsPerWord) {
- if (*word != 0) return false;
- word++;
+ const bm_word_t* words = map();
+ idx_t limit = word_index(size());
+ for (idx_t index = 0; index < limit; ++index) {
+ if (words[index] != 0) return false;
}
- return rest == 0 || (*word & right_n_bits((int)rest)) == 0;
+ idx_t rest = bit_in_word(size());
+ return (rest == 0) || (tail_of_map(words[limit], rest) == 0);
}
void BitMap::clear_large() {
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/native/utilities/test_bitMap_setops.cpp Sun Aug 14 21:19:42 2016 -0400
@@ -0,0 +1,417 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "utilities/bitMap.inline.hpp"
+#include "utilities/copy.hpp"
+#include "utilities/debug.hpp"
+#include "utilities/globalDefinitions.hpp"
+#include <stdlib.h>
+#include "unittest.hpp"
+
+typedef BitMap::idx_t idx_t;
+typedef BitMap::bm_word_t bm_word_t;
+
+class BitMapMemory {
+private:
+ idx_t _words;
+ bm_word_t* _memory;
+
+public:
+ BitMapMemory(idx_t bits) :
+ _words(BitMap::calc_size_in_words(bits)),
+ _memory(static_cast<bm_word_t*>(malloc(_words * sizeof(bm_word_t))))
+ { }
+
+ ~BitMapMemory() {
+ free(_memory);
+ }
+
+ BitMapView make_view(idx_t bits, bm_word_t value) {
+ vmassert(BitMap::calc_size_in_words(bits) <= _words, "invalid request");
+ STATIC_ASSERT(sizeof(bm_word_t) == sizeof(HeapWord));
+ Copy::fill_to_aligned_words((HeapWord*)_memory, _words, value);
+ return BitMapView(_memory, bits);
+ }
+
+ bm_word_t* memory() { return _memory; }
+};
+
+const idx_t aligned_size = 4 * BitsPerWord;
+const idx_t unaligned_size = aligned_size - (BitsPerWord / 2);
+
+static bm_word_t make_even_bits() {
+ bm_word_t result = 1;
+ while (true) {
+ bm_word_t next = (result << 2) | 1;
+ if (next == result) {
+ return result;
+ }
+ result = next;
+ }
+}
+
+const bm_word_t even_bits = make_even_bits();
+const bm_word_t odd_bits = ~even_bits;
+const bm_word_t one_bits = ~bm_word_t(0);
+const bm_word_t zero_bits = 0;
+
+// Scoped set a clear bit and restore to clear.
+class WithBitSet {
+private:
+ BitMap& _bm;
+ idx_t _index;
+
+public:
+ WithBitSet(BitMap& bm, idx_t index) : _bm(bm), _index(index) {
+ // Failure may indicate test bug; can't use ASSERT_xxx in constructor.
+ EXPECT_FALSE(_bm.at(_index));
+ bm.set_bit(_index);
+ }
+
+ ~WithBitSet() {
+ _bm.clear_bit(_index);
+ }
+};
+
+// Scoped clear a set bit and restore to set.
+class WithBitClear {
+private:
+ BitMap& _bm;
+ idx_t _index;
+
+public:
+ WithBitClear(BitMap& bm, idx_t index) : _bm(bm), _index(index) {
+ // Failure may indicate test bug; can't use ASSERT_xxx in constructor.
+ EXPECT_TRUE(_bm.at(_index));
+ bm.clear_bit(_index);
+ }
+
+ ~WithBitClear() {
+ _bm.set_bit(_index);
+ }
+};
+
+//////////////////////////////////////////////////////////////////////////////
+// bool is_same(const BitMap& bits);
+
+TEST(BitMap, is_same__aligned) {
+ BitMapMemory mx(aligned_size);
+ BitMapMemory my(aligned_size);
+
+ BitMapView x = mx.make_view(aligned_size, even_bits);
+ BitMapView y = my.make_view(aligned_size, even_bits);
+ EXPECT_TRUE(x.is_same(y));
+
+ WithBitClear wbc(x, aligned_size / 2);
+ EXPECT_FALSE(x.is_same(y));
+}
+
+TEST(BitMap, is_same__unaligned) {
+ BitMapMemory mx(aligned_size);
+ BitMapMemory my(aligned_size);
+
+ BitMapView x = mx.make_view(unaligned_size, even_bits);
+ BitMapView y = my.make_view(unaligned_size, even_bits);
+
+ // Check that a difference beyond the end of x/y doesn't count.
+ {
+ BitMapView aligned = BitMapView(mx.memory(), aligned_size);
+ const idx_t index = aligned_size - 2;
+ STATIC_ASSERT(unaligned_size <= index);
+
+ WithBitClear wbc(aligned, index);
+ EXPECT_TRUE(x.is_same(y));
+ }
+
+ // Check that a difference in the final partial word does count.
+ {
+ idx_t index = unaligned_size - 2;
+ ASSERT_LE(BitMap::word_align_down(unaligned_size), index);
+
+ WithBitClear wbc(y, index);
+ EXPECT_FALSE(x.is_same(y));
+ }
+}
+
+//////////////////////////////////////////////////////////////////////////////
+// bool is_full();
+// bool is_empty();
+
+TEST(BitMap, is_full_or_empty__aligned) {
+ BitMapMemory mx(aligned_size);
+
+ {
+ BitMapView x = mx.make_view(aligned_size, even_bits);
+ EXPECT_FALSE(x.is_full());
+ EXPECT_FALSE(x.is_empty());
+ }
+
+ {
+ BitMapView x = mx.make_view(aligned_size, zero_bits);
+ EXPECT_FALSE(x.is_full());
+ EXPECT_TRUE(x.is_empty());
+ }
+
+ {
+ BitMapView x = mx.make_view(aligned_size, one_bits);
+ EXPECT_TRUE(x.is_full());
+ EXPECT_FALSE(x.is_empty());
+ }
+}
+
+TEST(BitMap, is_full__unaligned) {
+ BitMapMemory mx(aligned_size);
+
+ BitMapView x = mx.make_view(unaligned_size, one_bits);
+ EXPECT_TRUE(x.is_full());
+
+ // Check that a missing bit beyond the end doesn't count.
+ {
+ idx_t index = aligned_size - 1;
+ BitMapView aligned = BitMapView(mx.memory(), aligned_size);
+
+ WithBitClear wcb(aligned, index);
+ EXPECT_FALSE(aligned.is_full());
+ EXPECT_TRUE(x.is_full());
+ }
+
+ // Check that a missing bit in the final partial word does count.
+ {
+ WithBitClear wcb(x, unaligned_size - 1);
+ EXPECT_FALSE(x.is_full());
+ }
+}
+
+TEST(BitMap, is_empty__unaligned) {
+ BitMapMemory mx(aligned_size);
+
+ BitMapView x = mx.make_view(unaligned_size, zero_bits);
+ EXPECT_TRUE(x.is_empty());
+
+ // Check that a set bit beyond the end doesn't count.
+ {
+ idx_t index = aligned_size - 1;
+ BitMapView aligned = BitMapView(mx.memory(), aligned_size);
+
+ WithBitSet wbs(aligned, index);
+ EXPECT_FALSE(aligned.is_empty());
+ EXPECT_TRUE(x.is_empty());
+ }
+
+ // Check that a set bit in the final partial word does count.
+ {
+ WithBitSet wbs(x, unaligned_size - 1);
+ EXPECT_FALSE(x.is_empty());
+ }
+}
+
+//////////////////////////////////////////////////////////////////////////////
+// bool contains(const BitMap& bits);
+
+TEST(BitMap, contains__aligned) {
+ BitMapMemory mx(aligned_size);
+ BitMapMemory my(aligned_size);
+
+ BitMapView x = mx.make_view(aligned_size, even_bits);
+ BitMapView y = my.make_view(aligned_size, even_bits);
+ EXPECT_TRUE(x.contains(y));
+
+ WithBitClear wbc(x, aligned_size / 2);
+ EXPECT_FALSE(x.contains(y));
+}
+
+TEST(BitMap, contains__unaligned) {
+ BitMapMemory mx(aligned_size);
+ BitMapMemory my(aligned_size);
+
+ BitMapView x = mx.make_view(unaligned_size, even_bits);
+ BitMapView y = my.make_view(unaligned_size, even_bits);
+
+ // Check that a missing bit beyond the end of x doesn't count.
+ {
+ BitMapView aligned = BitMapView(mx.memory(), aligned_size);
+ const idx_t index = aligned_size - 2;
+ STATIC_ASSERT(unaligned_size <= index);
+
+ WithBitClear wbc(aligned, index);
+ EXPECT_TRUE(x.contains(y));
+ }
+
+ // Check that a missing bit in the final partial word does count.
+ {
+ idx_t index = unaligned_size - 2;
+ ASSERT_LE(BitMap::word_align_down(unaligned_size), index);
+
+ WithBitClear wbc(x, index);
+ EXPECT_FALSE(x.contains(y));
+ }
+}
+
+//////////////////////////////////////////////////////////////////////////////
+// bool intersects(const BitMap& bits);
+
+TEST(BitMap, intersects__aligned) {
+ BitMapMemory mx(aligned_size);
+ BitMapMemory my(aligned_size);
+
+ BitMapView x = mx.make_view(aligned_size, even_bits);
+ BitMapView y = my.make_view(aligned_size, zero_bits);
+ EXPECT_FALSE(x.intersects(y));
+
+ ASSERT_TRUE(x.at(aligned_size / 2));
+ WithBitSet wbs(y, aligned_size / 2);
+ EXPECT_TRUE(x.intersects(y));
+}
+
+TEST(BitMap, intersects__unaligned) {
+ BitMapMemory mx(aligned_size);
+ BitMapMemory my(aligned_size);
+
+ BitMapView x = mx.make_view(unaligned_size, even_bits);
+ BitMapView y = my.make_view(unaligned_size, zero_bits);
+ EXPECT_FALSE(x.intersects(y));
+
+ // Check that adding a bit beyond the end of y doesn't count.
+ {
+ BitMapView aligned_x = BitMapView(mx.memory(), aligned_size);
+ BitMapView aligned_y = BitMapView(my.memory(), aligned_size);
+ const idx_t index = aligned_size - 2;
+ STATIC_ASSERT(unaligned_size <= index);
+ ASSERT_TRUE(aligned_x.at(index));
+
+ WithBitSet wbs(aligned_y, index);
+ EXPECT_FALSE(x.intersects(y));
+ }
+
+ // Check that adding a bit in the final partial word does count.
+ {
+ idx_t index = unaligned_size - 2;
+ ASSERT_LE(BitMap::word_align_down(unaligned_size), index);
+ ASSERT_TRUE(x.at(index));
+
+ WithBitSet wbs(y, index);
+ EXPECT_TRUE(x.intersects(y));
+ }
+}
+
+//////////////////////////////////////////////////////////////////////////////
+// void set_from(const BitMap& bits);
+// void set_union(const BitMap& bits);
+// void set_difference(const BitMap& bits);
+// void set_intersection(const BitMap& bits);
+//
+// bool set_union_with_result(const BitMap& bits);
+// bool set_difference_with_result(const BitMap& bits);
+// bool set_intersection_with_result(const BitMap& bits);
+
+static void check_tail_unmodified(BitMapMemory& mem,
+ idx_t bits,
+ bm_word_t fill_word) {
+ if (!BitMap::is_word_aligned(bits)) {
+ idx_t last_word_bit_index = BitMap::word_align_down(bits);
+ idx_t last_word_index = BitMap::calc_size_in_words(last_word_bit_index);
+ bm_word_t last_word = mem.memory()[last_word_index];
+ idx_t shift = bits - last_word_bit_index;
+ EXPECT_EQ(fill_word >> shift, last_word >> shift);
+ }
+}
+
+static void check_mod_setop(void (BitMap::*f)(const BitMap&),
+ idx_t bits,
+ bm_word_t wx,
+ bm_word_t wy,
+ bm_word_t wexp) {
+ BitMapMemory mx(bits);
+ BitMapMemory my(bits);
+ BitMapMemory mexp(bits);
+
+ BitMapView x = mx.make_view(bits, wx);
+ BitMapView y = my.make_view(bits, wy);
+ BitMapView exp = mexp.make_view(bits, wexp);
+
+ (x.*f)(y);
+
+ EXPECT_TRUE(exp.is_same(x));
+ check_tail_unmodified(mx, bits, wx);
+}
+
+static void check_mod_setop_with_result(bool (BitMap::*f)(const BitMap&),
+ idx_t bits,
+ bm_word_t wx,
+ bm_word_t wy,
+ bm_word_t wexp) {
+ BitMapMemory mx(bits);
+ BitMapMemory my(bits);
+ BitMapMemory mexp(bits);
+
+ BitMapView x = mx.make_view(bits, wx);
+ BitMapView y = my.make_view(bits, wy);
+ BitMapView exp = mexp.make_view(bits, wexp);
+
+ bool value = (x.*f)(y);
+ EXPECT_EQ(value, wx != wexp);
+
+ EXPECT_TRUE(exp.is_same(x));
+ check_tail_unmodified(mx, bits, wx);
+}
+
+#define CHECK_MOD_SETOP_AUX(checker, name, x, y, exp) \
+ TEST(BitMap, name ## __ ## x ## _ ## y) { \
+ checker(&BitMap::name, aligned_size, \
+ x ## _bits, y ## _bits, exp ## _bits); \
+ checker(&BitMap::name, unaligned_size, \
+ x ## _bits, y ## _bits, exp ## _bits); \
+ }
+
+#define CHECK_MOD_SETOP(name, x, y, exp) \
+ CHECK_MOD_SETOP_AUX(check_mod_setop, name, x, y, exp)
+
+#define CHECK_MOD_SETOP_WITH_RESULT(name, x, y, exp) \
+ CHECK_MOD_SETOP_AUX(check_mod_setop_with_result, name, x, y, exp)
+
+#define CHECK_MOD_SETOPS(name, x, y, exp) \
+ CHECK_MOD_SETOP(name, x, y, exp) \
+ CHECK_MOD_SETOP_WITH_RESULT(name ## _with_result, x, y, exp)
+
+CHECK_MOD_SETOP(set_from, even, even, even)
+CHECK_MOD_SETOP(set_from, even, odd, odd)
+CHECK_MOD_SETOP(set_from, even, one, one)
+CHECK_MOD_SETOP(set_from, even, zero, zero)
+
+CHECK_MOD_SETOPS(set_union, even, even, even)
+CHECK_MOD_SETOPS(set_union, even, odd, one)
+CHECK_MOD_SETOPS(set_union, even, one, one)
+CHECK_MOD_SETOPS(set_union, even, zero, even)
+
+CHECK_MOD_SETOPS(set_difference, even, even, zero)
+CHECK_MOD_SETOPS(set_difference, even, odd, even)
+CHECK_MOD_SETOPS(set_difference, even, one, zero)
+CHECK_MOD_SETOPS(set_difference, even, zero, even)
+
+CHECK_MOD_SETOPS(set_intersection, even, even, even)
+CHECK_MOD_SETOPS(set_intersection, even, odd, zero)
+CHECK_MOD_SETOPS(set_intersection, even, one, even)
+CHECK_MOD_SETOPS(set_intersection, even, zero, zero)
+