Fix MSVC ARM64 build

Author: jgiannuzzi

cpp/src/arrow/CMakeLists.txt

@@ -491,7 +491,6 @@ set(ARROW_UTIL_SRCS
     util/bitmap_ops.cc
     util/bpacking.cc
     util/bpacking_scalar.cc
-    util/bpacking_simd_default.cc
     util/byte_size.cc
     util/byte_stream_split_internal.cc
     util/cancel.cc
@@ -537,6 +536,9 @@ append_runtime_avx2_src(ARROW_UTIL_SRCS util/byte_stream_split_internal_avx2.cc)
 
 append_runtime_avx2_src(ARROW_UTIL_SRCS util/bpacking_simd_avx2.cc)
 append_runtime_avx512_src(ARROW_UTIL_SRCS util/bpacking_simd_avx512.cc)
+if(ARROW_HAVE_NEON)
+  list(APPEND ARROW_UTIL_SRCS util/bpacking_simd_neon.cc)
+endif()
 
 if(ARROW_WITH_BROTLI)
   list(APPEND ARROW_UTIL_SRCS util/compression_brotli.cc)

cpp/src/arrow/meson.build

@@ -176,7 +176,6 @@ arrow_util_srcs = [
     'util/bitmap_ops.cc',
     'util/bpacking.cc',
     'util/bpacking_scalar.cc',
-    'util/bpacking_simd_default.cc',
     'util/byte_size.cc',
     'util/byte_stream_split_internal.cc',
     'util/cancel.cc',

…/src/arrow/util/bpacking_simd_default.cc cpp/src/arrow/util/bpacking_simd_neon.cccpp/src/arrow/util/bpacking_simd_default.cc renamed to cpp/src/arrow/util/bpacking_simd_neon.cc cpp/src/arrow/util/bpacking_simd_default.cc renamed to cpp/src/arrow/util/bpacking_simd_neon.cc

@@ -21,8 +21,6 @@
 
 namespace arrow::internal {
 
-#if defined(ARROW_HAVE_NEON)
-
 template <typename Uint>
 int unpack_neon(const uint8_t* in, Uint* out, int batch_size, int num_bits) {
   return unpack_jump<Simd128UnpackerForWidth>(in, out, batch_size, num_bits);
@@ -34,6 +32,4 @@ template int unpack_neon<uint16_t>(const uint8_t*, uint16_t*, int, int);
 template int unpack_neon<uint32_t>(const uint8_t*, uint32_t*, int, int);
 template int unpack_neon<uint64_t>(const uint8_t*, uint64_t*, int, int);
 
-#endif
-
 }  // namespace arrow::internal