mirror of
https://chromium.googlesource.com/libyuv/libyuv
synced 2026-10-28 18:07:12 +08:00
0c781f87b8
Reduces include/libyuv/basic_types.h to only define LIBYUV_API. Directly includes <stdint.h> and <stddef.h> where needed in public headers. Replaces LIBYUV_BOOL, LIBYUV_FALSE, and LIBYUV_TRUE with C++ bool, true, and false in C++ code (MJpegDecoder, unit tests) and int (0, 1) for C API functions. Updates documentation and unit tests. Test: ninja -C out/Release libyuv_unittest && ./out/Release/libyuv_unittest --gtest_filter=* Change-Id: I2d58e872f0f976263bcda546dcc3b1b5f7e53d58 TAG=agy CONV=2730bc56-93ff-48ed-b615-dcde1b834394 Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/8280662 Commit-Queue: Wan-Teh Chang <wtc@google.com> Reviewed-by: Wan-Teh Chang <wtc@google.com>
95 lines
3.3 KiB
C++
95 lines
3.3 KiB
C++
/*
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* Copyright 2012 The LibYuv Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "libyuv/compare_row.h"
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#include "libyuv/row.h"
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#ifdef __cplusplus
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namespace libyuv {
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extern "C" {
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#endif
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#if !defined(LIBYUV_DISABLE_NEON) && defined(__ARM_NEON__) && \
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!defined(__aarch64__)
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// 256 bits at a time
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// uses short accumulator which restricts count to 131 KB
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uint32_t HammingDistance_NEON(const uint8_t* src_a,
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const uint8_t* src_b,
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int count) {
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uint32_t diff;
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asm volatile(
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"vmov.u16 q4, #0 \n" // accumulator
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"1: \n"
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"vld1.8 {q0, q1}, [%0]! \n"
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"vld1.8 {q2, q3}, [%1]! \n"
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"veor.32 q0, q0, q2 \n"
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"veor.32 q1, q1, q3 \n"
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"vcnt.i8 q0, q0 \n"
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"vcnt.i8 q1, q1 \n"
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"subs %2, %2, #32 \n"
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"vadd.u8 q0, q0, q1 \n" // 16 byte counts
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"vpadal.u8 q4, q0 \n" // 8 shorts
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"bgt 1b \n"
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"vpaddl.u16 q0, q4 \n" // 4 ints
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"vpadd.u32 d0, d0, d1 \n"
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"vpadd.u32 d0, d0, d0 \n"
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"vmov.32 %3, d0[0] \n"
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: "+r"(src_a), "+r"(src_b), "+r"(count), "=r"(diff)
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:
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: "cc", "q0", "q1", "q2", "q3", "q4");
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return diff;
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}
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uint32_t SumSquareError_NEON(const uint8_t* src_a,
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const uint8_t* src_b,
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int count) {
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uint32_t sse;
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asm volatile(
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"vmov.u8 q8, #0 \n"
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"vmov.u8 q10, #0 \n"
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"vmov.u8 q9, #0 \n"
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"vmov.u8 q11, #0 \n"
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"1: \n"
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"vld1.8 {q0}, [%0]! \n"
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"vld1.8 {q1}, [%1]! \n"
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"subs %2, %2, #16 \n"
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"vsubl.u8 q2, d0, d2 \n"
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"vsubl.u8 q3, d1, d3 \n"
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"vmlal.s16 q8, d4, d4 \n"
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"vmlal.s16 q9, d6, d6 \n"
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"vmlal.s16 q10, d5, d5 \n"
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"vmlal.s16 q11, d7, d7 \n"
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"bgt 1b \n"
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"vadd.u32 q8, q8, q9 \n"
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"vadd.u32 q10, q10, q11 \n"
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"vadd.u32 q11, q8, q10 \n"
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"vpaddl.u32 q1, q11 \n"
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"vadd.u64 d0, d2, d3 \n"
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"vmov.32 %3, d0[0] \n"
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: "+r"(src_a), "+r"(src_b), "+r"(count), "=r"(sse)
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:
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: "memory", "cc", "q0", "q1", "q2", "q3", "q8", "q9", "q10", "q11");
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return sse;
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}
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#endif // defined(__ARM_NEON__) && !defined(__aarch64__)
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#ifdef __cplusplus
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} // extern "C"
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} // namespace libyuv
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#endif
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