1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libyuv/source/compare_neon.cc Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,61 @@
1.4 +/*
1.5 + * Copyright 2012 The LibYuv Project Authors. All rights reserved.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license
1.8 + * that can be found in the LICENSE file in the root of the source
1.9 + * tree. An additional intellectual property rights grant can be found
1.10 + * in the file PATENTS. All contributing project authors may
1.11 + * be found in the AUTHORS file in the root of the source tree.
1.12 + */
1.13 +
1.14 +#include "libyuv/basic_types.h"
1.15 +
1.16 +#ifdef __cplusplus
1.17 +namespace libyuv {
1.18 +extern "C" {
1.19 +#endif
1.20 +
1.21 +#if !defined(LIBYUV_DISABLE_NEON) && defined(__ARM_NEON__)
1.22 +
1.23 +uint32 SumSquareError_NEON(const uint8* src_a, const uint8* src_b, int count) {
1.24 + volatile uint32 sse;
1.25 + asm volatile (
1.26 + "vmov.u8 q8, #0 \n"
1.27 + "vmov.u8 q10, #0 \n"
1.28 + "vmov.u8 q9, #0 \n"
1.29 + "vmov.u8 q11, #0 \n"
1.30 +
1.31 + ".p2align 2 \n"
1.32 + "1: \n"
1.33 + "vld1.8 {q0}, [%0]! \n"
1.34 + "vld1.8 {q1}, [%1]! \n"
1.35 + "subs %2, %2, #16 \n"
1.36 + "vsubl.u8 q2, d0, d2 \n"
1.37 + "vsubl.u8 q3, d1, d3 \n"
1.38 + "vmlal.s16 q8, d4, d4 \n"
1.39 + "vmlal.s16 q9, d6, d6 \n"
1.40 + "vmlal.s16 q10, d5, d5 \n"
1.41 + "vmlal.s16 q11, d7, d7 \n"
1.42 + "bgt 1b \n"
1.43 +
1.44 + "vadd.u32 q8, q8, q9 \n"
1.45 + "vadd.u32 q10, q10, q11 \n"
1.46 + "vadd.u32 q11, q8, q10 \n"
1.47 + "vpaddl.u32 q1, q11 \n"
1.48 + "vadd.u64 d0, d2, d3 \n"
1.49 + "vmov.32 %3, d0[0] \n"
1.50 + : "+r"(src_a),
1.51 + "+r"(src_b),
1.52 + "+r"(count),
1.53 + "=r"(sse)
1.54 + :
1.55 + : "memory", "cc", "q0", "q1", "q2", "q3", "q8", "q9", "q10", "q11");
1.56 + return sse;
1.57 +}
1.58 +
1.59 +#endif // __ARM_NEON__
1.60 +
1.61 +#ifdef __cplusplus
1.62 +} // extern "C"
1.63 +} // namespace libyuv
1.64 +#endif
