93 lines
3.3 KiB
C++
93 lines
3.3 KiB
C++
/*
|
|
* 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"
|
|
|
|
#include "libyuv/compare_row.h"
|
|
#include "libyuv/row.h"
|
|
|
|
#ifdef __cplusplus
|
|
namespace libyuv {
|
|
extern "C" {
|
|
#endif
|
|
|
|
#if !defined(LIBYUV_DISABLE_NEON) && defined(__ARM_NEON__) && \
|
|
!defined(__aarch64__)
|
|
|
|
// 256 bits at a time
|
|
// uses short accumulator which restricts count to 131 KB
|
|
uint32 HammingDistance_NEON(const uint8* src_a, const uint8* src_b, int count) {
|
|
uint32 diff;
|
|
|
|
asm volatile(
|
|
"vmov.u16 q4, #0 \n" // accumulator
|
|
|
|
"1: \n"
|
|
"vld1.8 {q0, q1}, [%0]! \n"
|
|
"vld1.8 {q2, q3}, [%1]! \n"
|
|
"veor.32 q0, q0, q2 \n"
|
|
"veor.32 q1, q1, q3 \n"
|
|
"vcnt.i8 q0, q0 \n"
|
|
"vcnt.i8 q1, q1 \n"
|
|
"subs %2, %2, #32 \n"
|
|
"vadd.u8 q0, q0, q1 \n" // 16 byte counts
|
|
"vpadal.u8 q4, q0 \n" // 8 shorts
|
|
"bgt 1b \n"
|
|
|
|
"vpaddl.u16 q0, q4 \n" // 4 ints
|
|
"vpadd.u32 d0, d0, d1 \n"
|
|
"vpadd.u32 d0, d0, d0 \n"
|
|
"vmov.32 %3, d0[0] \n"
|
|
|
|
: "+r"(src_a), "+r"(src_b), "+r"(count), "=r"(diff)
|
|
:
|
|
: "cc", "q0", "q1", "q2", "q3", "q4");
|
|
return diff;
|
|
}
|
|
|
|
uint32 SumSquareError_NEON(const uint8* src_a, const uint8* src_b, int count) {
|
|
uint32 sse;
|
|
asm volatile(
|
|
"vmov.u8 q8, #0 \n"
|
|
"vmov.u8 q10, #0 \n"
|
|
"vmov.u8 q9, #0 \n"
|
|
"vmov.u8 q11, #0 \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 // defined(__ARM_NEON__) && !defined(__aarch64__)
|
|
|
|
#ifdef __cplusplus
|
|
} // extern "C"
|
|
} // namespace libyuv
|
|
#endif
|