diff options
Diffstat (limited to 'tests/benchmarks')
| -rw-r--r-- | tests/benchmarks/corelib/tools/qstring/main.cpp | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/tests/benchmarks/corelib/tools/qstring/main.cpp b/tests/benchmarks/corelib/tools/qstring/main.cpp index ee7ce5c..9eb6294 100644 --- a/tests/benchmarks/corelib/tools/qstring/main.cpp +++ b/tests/benchmarks/corelib/tools/qstring/main.cpp @@ -173,6 +173,52 @@ static bool equals2_shortwise(ushort *p1, ushort *p2, int len) return true; } +static bool equals2_intwise(ushort *p1, ushort *p2, int length) +{ + register union { + const quint16 *w; + const quint32 *d; + quintptr value; + } sa, sb; + sa.w = p1; + sb.w = p2; + + // check alignment + if ((sa.value & 2) == (sb.value & 2)) { + // both addresses have the same alignment + if (sa.value & 2) { + // both addresses are not aligned to 4-bytes boundaries + // compare the first character + if (*sa.w != *sb.w) + return false; + --length; + ++sa.w; + ++sb.w; + + // now both addresses are 4-bytes aligned + } + + // both addresses are 4-bytes aligned + // do a fast 32-bit comparison + register const quint32 *e = sa.d + (length >> 1); + for ( ; sa.d != e; ++sa.d, ++sb.d) { + if (*sa.d != *sb.d) + return false; + } + + // do we have a tail? + return (length & 1) ? *sa.w == *sb.w : true; + } else { + // one of the addresses isn't 4-byte aligned but the other is + register const quint16 *e = sa.w + length; + for ( ; sa.w != e; ++sa.w, ++sb.w) { + if (*sa.w != *sb.w) + return false; + } + } + return true; +} + void tst_QString::equals2_data() const { QTest::addColumn<int>("algorithm"); @@ -180,6 +226,7 @@ void tst_QString::equals2_data() const QTest::newRow("memcmp_call") << 0; QTest::newRow("bytewise") << 1; QTest::newRow("shortwise") << 2; + QTest::newRow("intwise") << 3; } void tst_QString::equals2() const @@ -226,6 +273,7 @@ void tst_QString::equals2() const equals2_memcmp_call, // 0 equals2_bytewise, // 1 equals2_shortwise, // 1 + equals2_intwise, // 3 0 }; |