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| author | Thiago Macieira <thiago.macieira@nokia.com> | 2010-08-12 19:14:00 (GMT) |
|---|---|---|
| committer | Thiago Macieira <thiago.macieira@nokia.com> | 2010-08-24 10:36:31 (GMT) |
| commit | d8ad0812c7fdc2684ce7f09cc13b69f567e82031 (patch) | |
| tree | 222c8733ad1953a53daea01b9653fa79c22de636 /tests/benchmarks | |
| parent | de76f8f32b84409a7053d5d95a3855b8590389e1 (diff) | |
| download | Qt-d8ad0812c7fdc2684ce7f09cc13b69f567e82031.zip Qt-d8ad0812c7fdc2684ce7f09cc13b69f567e82031.tar.gz Qt-d8ad0812c7fdc2684ce7f09cc13b69f567e82031.tar.bz2 | |
Add a benchmark for SSE2 comparison.
This function uses unaligned loads. I'll try to write one with
aligned loads later.
Diffstat (limited to 'tests/benchmarks')
| -rw-r--r-- | tests/benchmarks/corelib/tools/qstring/main.cpp | 27 | ||||
| -rw-r--r-- | tests/benchmarks/corelib/tools/qstring/qstring.pro | 1 |
2 files changed, 28 insertions, 0 deletions
diff --git a/tests/benchmarks/corelib/tools/qstring/main.cpp b/tests/benchmarks/corelib/tools/qstring/main.cpp index 9eb6294..5210034 100644 --- a/tests/benchmarks/corelib/tools/qstring/main.cpp +++ b/tests/benchmarks/corelib/tools/qstring/main.cpp @@ -219,6 +219,27 @@ static bool equals2_intwise(ushort *p1, ushort *p2, int length) return true; } +#ifdef __SSE2__ +static bool equals2_sse2(ushort *p1, ushort *p2, int len) +{ + if (len > 8) { + while (len > 8) { + __m128i q1 = _mm_loadu_si128((__m128i *)p1); + __m128i q2 = _mm_loadu_si128((__m128i *)p2); + __m128i cmp = _mm_cmpeq_epi16(q1, q2); + if (ushort(_mm_movemask_epi8(cmp)) != 0xffff) + return false; + + len -= 8; + p1 += 8; + p2 += 8; + } + } + + return equals2_shortwise(p1, p2, len); +} +#endif + void tst_QString::equals2_data() const { QTest::addColumn<int>("algorithm"); @@ -227,6 +248,9 @@ void tst_QString::equals2_data() const QTest::newRow("bytewise") << 1; QTest::newRow("shortwise") << 2; QTest::newRow("intwise") << 3; +#ifdef __SSE2__ + QTest::newRow("sse2") << 4; +#endif } void tst_QString::equals2() const @@ -274,6 +298,9 @@ void tst_QString::equals2() const equals2_bytewise, // 1 equals2_shortwise, // 1 equals2_intwise, // 3 +#ifdef __SSE2__ + equals2_sse2, // 4 +#endif 0 }; diff --git a/tests/benchmarks/corelib/tools/qstring/qstring.pro b/tests/benchmarks/corelib/tools/qstring/qstring.pro index fa4310e..388e3c2 100644 --- a/tests/benchmarks/corelib/tools/qstring/qstring.pro +++ b/tests/benchmarks/corelib/tools/qstring/qstring.pro @@ -14,3 +14,4 @@ wince*:{ DEFINES += SRCDIR=\\\"$$PWD/\\\" } +sse2:QMAKE_CXXFLAGS += -msse2 |