mirror of
https://chromium.googlesource.com/libyuv/libyuv
synced 2025-12-06 16:56:55 +08:00
e0615c0e69
BUG=libyuv:701 TEST=LibYUVBaseTest.BenchmarkHammingDistance_C R=wangcheng@google.com Change-Id: I243003b098bea8ef3809298bbec349ed52a43d8c Reviewed-on: https://chromium-review.googlesource.com/499487 Reviewed-by: Cheng Wang <wangcheng@google.com>
97 lines
3.1 KiB
C++
97 lines
3.1 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(__aarch64__)
|
|
|
|
// 256 bits at a time
|
|
uint32 HammingDistance_NEON(const uint8* src_a, const uint8* src_b, int count) {
|
|
uint32 diff;
|
|
asm volatile (
|
|
"movi d4, #0 \n"
|
|
|
|
"1: \n"
|
|
MEMACCESS(0)
|
|
"ld1 {v0.16b, v1.16b}, [%0], #32 \n"
|
|
MEMACCESS(1)
|
|
"ld1 {v2.16b, v3.16b}, [%1], #32 \n"
|
|
"subs %w2, %w2, #32 \n"
|
|
"eor v0.16b, v0.16b, v2.16b \n"
|
|
"eor v1.16b, v1.16b, v3.16b \n"
|
|
"cnt v0.16b, v0.16b \n"
|
|
"cnt v1.16b, v1.16b \n"
|
|
"uaddlv h0, v0.16b \n"
|
|
"uaddlv h1, v1.16b \n"
|
|
"add d4, d4, d0 \n"
|
|
"add d4, d4, d1 \n"
|
|
"b.gt 1b \n"
|
|
|
|
"fmov %w3, s4 \n"
|
|
: "+r"(src_a),
|
|
"+r"(src_b),
|
|
"+r"(count),
|
|
"=r"(diff)
|
|
:
|
|
: "cc", "v0", "v1", "v2", "v3", "v4");
|
|
return diff;
|
|
}
|
|
|
|
uint32 SumSquareError_NEON(const uint8* src_a, const uint8* src_b, int count) {
|
|
uint32 sse;
|
|
asm volatile (
|
|
"eor v16.16b, v16.16b, v16.16b \n"
|
|
"eor v18.16b, v18.16b, v18.16b \n"
|
|
"eor v17.16b, v17.16b, v17.16b \n"
|
|
"eor v19.16b, v19.16b, v19.16b \n"
|
|
|
|
"1: \n"
|
|
MEMACCESS(0)
|
|
"ld1 {v0.16b}, [%0], #16 \n"
|
|
MEMACCESS(1)
|
|
"ld1 {v1.16b}, [%1], #16 \n"
|
|
"subs %w2, %w2, #16 \n"
|
|
"usubl v2.8h, v0.8b, v1.8b \n"
|
|
"usubl2 v3.8h, v0.16b, v1.16b \n"
|
|
"smlal v16.4s, v2.4h, v2.4h \n"
|
|
"smlal v17.4s, v3.4h, v3.4h \n"
|
|
"smlal2 v18.4s, v2.8h, v2.8h \n"
|
|
"smlal2 v19.4s, v3.8h, v3.8h \n"
|
|
"b.gt 1b \n"
|
|
|
|
"add v16.4s, v16.4s, v17.4s \n"
|
|
"add v18.4s, v18.4s, v19.4s \n"
|
|
"add v19.4s, v16.4s, v18.4s \n"
|
|
"addv s0, v19.4s \n"
|
|
"fmov %w3, s0 \n"
|
|
: "+r"(src_a),
|
|
"+r"(src_b),
|
|
"+r"(count),
|
|
"=r"(sse)
|
|
:
|
|
: "cc", "v0", "v1", "v2", "v3", "v16", "v17", "v18", "v19");
|
|
return sse;
|
|
}
|
|
|
|
#endif // !defined(LIBYUV_DISABLE_NEON) && defined(__aarch64__)
|
|
|
|
#ifdef __cplusplus
|
|
} // extern "C"
|
|
} // namespace libyuv
|
|
#endif
|