KleidiCV Coverage Report

Directory: ./
File: kleidicv/src/analysis/min_max_neon.cpp
Date: 2025-09-25 14:13:34
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1 // SPDX-FileCopyrightText: 2023 - 2024 Arm Limited and/or its affiliates <open-source-office@arm.com>
2 //
3 // SPDX-License-Identifier: Apache-2.0
4
5 #include <limits>
6
7 #include "kleidicv/kleidicv.h"
8 #include "kleidicv/neon.h"
9
10 namespace kleidicv::neon {
11
12 template <typename ScalarType>
13 class MinMax final : public UnrollTwice {
14 public:
15 using VecTraits = neon::VecTraits<ScalarType>;
16 using VectorType = typename VecTraits::VectorType;
17
18 890 MinMax()
19 890 : vmin_(vdupq_n(std::numeric_limits<ScalarType>::max())),
20 890 vmax_(vdupq_n(std::numeric_limits<ScalarType>::lowest())),
21 890 min_(std::numeric_limits<ScalarType>::max()),
22 890 max_(std::numeric_limits<ScalarType>::lowest()) {}
23
24 3696 void vector_path(VectorType src) {
25 3696 vmin_ = vminq(vmin_, src);
26 3696 vmax_ = vmaxq(vmax_, src);
27 3696 }
28
29 12848 void scalar_path(ScalarType src) {
30 12848 min_ = std::min(min_, src);
31 12848 max_ = std::max(max_, src);
32 12848 }
33
34 518 ScalarType get_min() const {
35 518 return std::min<ScalarType>(min_, vminvq(vmin_));
36 }
37
38 518 ScalarType get_max() const {
39 518 return std::max<ScalarType>(max_, vmaxvq(vmax_));
40 }
41
42 private:
43 VectorType vmin_, vmax_;
44 ScalarType min_, max_;
45 }; // end of class MinMax<T>
46
47 template <typename ScalarType>
48 1098 kleidicv_error_t min_max(const ScalarType *src, size_t src_stride, size_t width,
49 size_t height, ScalarType *min_value,
50 ScalarType *max_value) {
51
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 1098 CHECK_POINTER_AND_STRIDE(src, src_stride, height);
52
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 914 CHECK_IMAGE_SIZE(width, height);
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 902 if (KLEIDICV_UNLIKELY(width == 0 || height == 0)) {
55 12 return KLEIDICV_ERROR_RANGE;
56 }
57
58 890 Rectangle rect{width, height};
59 890 Rows<const ScalarType> src_rows{src, src_stride};
60 890 MinMax<ScalarType> operation;
61 890 apply_operation_by_rows(operation, rect, src_rows);
62
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 890 if (min_value) {
63 518 *min_value = operation.get_min();
64 518 }
65
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 890 if (max_value) {
66 518 *max_value = operation.get_max();
67 518 }
68 890 return KLEIDICV_OK;
69 1098 }
70
71 #define KLEIDICV_INSTANTIATE_TEMPLATE(type) \
72 template KLEIDICV_TARGET_FN_ATTRS kleidicv_error_t min_max<type>( \
73 const type *src, size_t src_stride, size_t width, size_t height, \
74 type *min_value, type *max_value)
75
76 KLEIDICV_INSTANTIATE_TEMPLATE(int8_t);
77 KLEIDICV_INSTANTIATE_TEMPLATE(uint8_t);
78 KLEIDICV_INSTANTIATE_TEMPLATE(int16_t);
79 KLEIDICV_INSTANTIATE_TEMPLATE(uint16_t);
80 KLEIDICV_INSTANTIATE_TEMPLATE(int32_t);
81 KLEIDICV_INSTANTIATE_TEMPLATE(float);
82
83 } // namespace kleidicv::neon
84