Half float neon port, enable O2 for neon, and denormal test.

source/row_any.cc

 /*
  *  Copyright 2012 The LibYuv Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS. All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 567 matching lines @@
 
 #ifdef HAS_HALFFLOATROW_SSE2
 ANY11P16(HalfFloatRow_Any_SSE2, HalfFloatRow_SSE2, float, 1, 1, 15)
 #endif
 #ifdef HAS_HALFFLOATROW_AVX2
 ANY11P16(HalfFloatRow_Any_AVX2, HalfFloatRow_AVX2, float, 1, 1, 15)
 #endif
 #ifdef HAS_HALFFLOATROW_F16C
 ANY11P16(HalfFloatRow_Any_F16C, HalfFloatRow_F16C, float, 1, 1, 15)
 #endif
+#ifdef HAS_HALFFLOATROW_NEON
+ANY11P16(HalfFloatRow_Any_NEON, HalfFloatRow_NEON, float, 1, 1, 7)
+#endif
 #undef ANY11P16
 
 // Any 1 to 1 with yuvconstants
 #define ANY11C(NAMEANY, ANY_SIMD, UVSHIFT, SBPP, BPP, MASK)                    \
     void NAMEANY(const uint8* src_ptr, uint8* dst_ptr,                         \
                  const struct YuvConstants* yuvconstants, int width) {         \
       SIMD_ALIGNED(uint8 temp[128 * 2]);                                       \
       memset(temp, 0, 128);  /* for YUY2 and msan */                           \
       int r = width & MASK;                                                    \
       int n = width & ~MASK;                                                   \
@@ skipping 256 matching lines @@
 #endif
 #ifdef HAS_UYVYTOUVROW_MSA
 ANY12S(UYVYToUVRow_Any_MSA, UYVYToUVRow_MSA, 1, 4, 31)
 #endif
 #undef ANY12S
 
 #ifdef __cplusplus
 }  // extern "C"
 }  // namespace libyuv
 #endif