Rearrange prefetch code

No functional change.

diff --git a/src/misc.cpp b/src/misc.cpp
index 1e1b220..608d772 100644 (file)
--- a/src/misc.cpp
+++ b/src/misc.cpp
@@ -227,21 +227,17 @@ void prefetch(char*) {}
 
 #else
 
-#  if defined(__INTEL_COMPILER) || defined(__ICL) || defined(_MSC_VER)
-#   include <xmmintrin.h>
-#  endif
-
 void prefetch(char* addr) {
 
-#  if defined(__INTEL_COMPILER) || defined(__ICL)
+#  if defined(__INTEL_COMPILER)
    // This hack prevents prefetches to be optimized away by
    // Intel compiler. Both MSVC and gcc seems not affected.
    __asm__ ("");
 #  endif
 
-#  if defined(__INTEL_COMPILER) || defined(__ICL) || defined(_MSC_VER)
-  _mm_prefetch(addr, _MM_HINT_T2);
-  _mm_prefetch(addr+64, _MM_HINT_T2); // 64 bytes ahead
+#  if defined(__INTEL_COMPILER) || defined(_MSC_VER)
+  _mm_prefetch(addr, _MM_HINT_T0);
+  _mm_prefetch(addr+64, _MM_HINT_T0); // 64 bytes ahead
 #  else
   __builtin_prefetch(addr);
   __builtin_prefetch(addr+64);

diff --git a/src/types.h b/src/types.h
index 59d051e..0774557 100644 (file)
--- a/src/types.h
+++ b/src/types.h
@@ -51,6 +51,10 @@
 #  include <nmmintrin.h> // Intel header for _mm_popcnt_u64() intrinsic
 #endif
 
+#  if !defined(NO_PREFETCH) && (defined(__INTEL_COMPILER) || defined(_MSC_VER))
+#   include <xmmintrin.h> // Intel and Microsoft header for _mm_prefetch()
+#  endif
+
 #if defined(_MSC_VER) || defined(__INTEL_COMPILER)
 #  define CACHE_LINE_ALIGNMENT __declspec(align(64))
 #else