diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-09-13 17:04:52 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-09-13 19:13:32 +0200 |
| commit | 86444f084b23c967d556039b22a67d80a72725ca (patch) | |
| tree | 4b9e7fd90f94fae7402111575c1dba62b581ca41 /util | |
| parent | efad6682452ec85a898609c885c2721ea12585db (diff) | |
cutils: Add SSE4 version
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'util')
| -rw-r--r-- | util/bufferiszero.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/util/bufferiszero.c b/util/bufferiszero.c index 4af3caa1b6..bafd3d159c 100644 --- a/util/bufferiszero.c +++ b/util/bufferiszero.c @@ -114,6 +114,13 @@ ACCEL_BUFFER_ZERO(buffer_zero_sse2, 64, __m128i, SSE2_NONZERO) #ifdef CONFIG_AVX2_OPT #pragma GCC push_options +#pragma GCC target("sse4") +#include <smmintrin.h> +#define SSE4_NONZERO(X) !_mm_testz_si128((X), (X)) +ACCEL_BUFFER_ZERO(buffer_zero_sse4, 64, __m128i, SSE4_NONZERO) +#pragma GCC pop_options + +#pragma GCC push_options #pragma GCC target("avx2") #include <immintrin.h> #define AVX2_NONZERO(X) !_mm256_testz_si256((X), (X)) @@ -182,6 +189,9 @@ static bool select_accel_fn(const void *buf, size_t len) if (len % 128 == 0 && ibuf % 32 == 0 && (cpuid_cache & CACHE_AVX2)) { return buffer_zero_avx2(buf, len); } + if (len % 64 == 0 && ibuf % 16 == 0 && (cpuid_cache & CACHE_SSE4)) { + return buffer_zero_sse4(buf, len); + } #endif if (len % 64 == 0 && ibuf % 16 == 0 && (cpuid_cache & CACHE_SSE2)) { return buffer_zero_sse2(buf, len); |