Fix and optimize handling of vectorized memory accesses

3rdparty/mshadow/mshadow/base.h

@@ -253,7 +253,6 @@ extern "C" {
  }
 
 #include "./half.h"
-#include "./half2.h"
 #include "./bfloat.h"
 #define MSHADOW_HALF_BF_OPERATOR(RTYPE, OP) \
  MSHADOW_XINLINE RTYPE operator OP(mshadow::half::half_t a, mshadow::bfloat::bf16_t b) { \
@@ -368,11 +367,6 @@ struct DataType<half::half_t> {
 #endif
 };
 template<>
-struct DataType<half::half2_t> {
- static const int kFlag = kFloat16;
- static const int kLanes = 2;
-};
-template<>
 struct DataType<bfloat::bf16_t> {
  static const int kFlag = kBfloat16;
  static const int kLanes = 1;
@@ -1125,48 +1119,6 @@ struct minimum {
  }
 #endif
 
-#define MSHADOW_TYPE_SWITCH_WITH_HALF2(type, DType, ...) \
- switch (type) { \
- case mshadow::kFloat32: \
- { \
- typedef float DType; \
- {__VA_ARGS__} \
- } \
- break; \
- case mshadow::kFloat64: \
- { \
- typedef double DType; \
- {__VA_ARGS__} \
- } \
- break; \
- case mshadow::kFloat16: \
- { \
- typedef mshadow::half::half2_t DType; \
- {__VA_ARGS__} \
- } \
- break; \
- case mshadow::kUint8: \
- { \
- typedef uint8_t DType; \
- {__VA_ARGS__} \
- } \
- break; \
- case mshadow::kInt32: \
- { \
- typedef int32_t DType; \
- {__VA_ARGS__} \
- } \
- break; \
- case mshadow::kInt64: \
- { \
- typedef int64_t DType; \
- {__VA_ARGS__} \
- } \
- break; \
- default: \
- LOG(FATAL) << "Unknown type enum " << type; \
- }
-
 #define MSHADOW_SGL_DBL_TYPE_SWITCH(type, DType, ...) \
  switch (type) { \
  case mshadow::kFloat32: \