diff options
| -rw-r--r-- | tests/benchmarks/corelib/tools/qstring/main.cpp | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/tests/benchmarks/corelib/tools/qstring/main.cpp b/tests/benchmarks/corelib/tools/qstring/main.cpp index 5210034..4e5d1c0 100644 --- a/tests/benchmarks/corelib/tools/qstring/main.cpp +++ b/tests/benchmarks/corelib/tools/qstring/main.cpp @@ -238,6 +238,42 @@ static bool equals2_sse2(ushort *p1, ushort *p2, int len) return equals2_shortwise(p1, p2, len); } + +static inline +#ifdef Q_CC_GNU +__attribute__((always_inline)) +#endif +bool prolog_align(ushort *&p1, ushort *&p2, int &len) +{ + const ushort *end = (ushort*) ((quintptr(p1) + 15) & ~15); + if (end > p1 + len) + end = p1 + len; + for ( ; p1 != end; ++p1, ++p2, --len) + if (*p1 != *p2) + return false; + return true; +} + +static bool equals2_sse2_aligning(ushort *p1, ushort *p2, int len) +{ + if (len > 8) { + if (!prolog_align(p1, p2, len)) + return false; + while (len > 8) { + __m128i q1 = _mm_load_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 @@ -250,6 +286,7 @@ void tst_QString::equals2_data() const QTest::newRow("intwise") << 3; #ifdef __SSE2__ QTest::newRow("sse2") << 4; + QTest::newRow("sse2_aligning") << 5; #endif } @@ -300,6 +337,7 @@ void tst_QString::equals2() const equals2_intwise, // 3 #ifdef __SSE2__ equals2_sse2, // 4 + equals2_sse2_aligning, // 5 #endif 0 }; |