From: Robert Hoo
And intialize buffer_is_zero() with it, when Intel AVX512F is
available on host.
This function utilizes Intel AVX512 fundamental instructions which
is faster than its implementation with AVX2 (in my unit test, with
4K buffer, on CascadeLake SP, ~36% faster, buffer_zero_avx512()
This breaks if AVX2 and AVX512 are both disabled but SSE2 isn't, because
it calls buffer_is_zero_sse2 even with length < 64. Fix:
diff --git a/util/bufferiszero.c b/util/bufferiszero.c
index b6eab0c..6639035 100644
--- a/util/bufferiszero.c
+++ b/util/bufferiszero.c
@@ -247,23 +247,20 @@
From: Robert Hoo
And intialize buffer_is_zero() with it, when Intel AVX512F is
available on host.
This function utilizes Intel AVX512 fundamental instructions which
is faster than its implementation with AVX2 (in my unit test, with
4K buffer, on CascadeLake SP, ~36% faster, buffer_zero_avx512()
