/* | |
* 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. | |
*/ | |
#include "libyuv/basic_types.h" | |
#ifdef __cplusplus | |
namespace libyuv { | |
extern "C" { | |
#endif | |
#if !defined(LIBYUV_DISABLE_NEON) && defined(__ARM_NEON__) | |
uint32 SumSquareError_NEON(const uint8* src_a, const uint8* src_b, int count) { | |
volatile uint32 sse; | |
asm volatile ( | |
"vmov.u8 q8, #0 \n" | |
"vmov.u8 q10, #0 \n" | |
"vmov.u8 q9, #0 \n" | |
"vmov.u8 q11, #0 \n" | |
".p2align 2 \n" | |
"1: \n" | |
"vld1.8 {q0}, [%0]! \n" | |
"vld1.8 {q1}, [%1]! \n" | |
"subs %2, %2, #16 \n" | |
"vsubl.u8 q2, d0, d2 \n" | |
"vsubl.u8 q3, d1, d3 \n" | |
"vmlal.s16 q8, d4, d4 \n" | |
"vmlal.s16 q9, d6, d6 \n" | |
"vmlal.s16 q10, d5, d5 \n" | |
"vmlal.s16 q11, d7, d7 \n" | |
"bgt 1b \n" | |
"vadd.u32 q8, q8, q9 \n" | |
"vadd.u32 q10, q10, q11 \n" | |
"vadd.u32 q11, q8, q10 \n" | |
"vpaddl.u32 q1, q11 \n" | |
"vadd.u64 d0, d2, d3 \n" | |
"vmov.32 %3, d0[0] \n" | |
: "+r"(src_a), | |
"+r"(src_b), | |
"+r"(count), | |
"=r"(sse) | |
: | |
: "memory", "cc", "q0", "q1", "q2", "q3", "q8", "q9", "q10", "q11"); | |
return sse; | |
} | |
#endif // __ARM_NEON__ | |
#ifdef __cplusplus | |
} // extern "C" | |
} // namespace libyuv | |
#endif |