GatherNd

根据索引张量中的坐标，从输入张量中收集切片或元素。

GatherNd 允许根据 indices 提供的多维索引，在 input 张量的指定轴上进行切片提取。如果 indices 的最后一个维度长度为 K，则它代表从 input 的前 K 个维度中提取对应的子张量（切片）。

输入：

  • input - 输入数据张量地址。

  • output - 计算结果张量地址。

  • input_shape - 输入张量的形状数组地址。

  • input_ndim - 输入张量的维度数。

  • indices - 索引张量地址（类型固定为 int32）。

  • indices_shape - 索引张量的形状数组地址。

  • indices_ndim - 索引张量的维度数。

  • core_mask(int, 可选) - 核掩码（仅适用于共享存储版本）。

输出：

  • output - 收集后的数据存放地址。

支持平台：

FT78NE MT7004

备注

  • FT78NE 支持 int8, int16, int32, fp32, fp64, cplx64, cplx128

  • MT7004 支持 fp16, fp32, int16, int32, cplx64

  • 索引张量 (indices) 在所有平台上均使用 int32 类型。

  • 坐标索引必须在输入张量维度的合法范围内，否则行为未定义。

共享存储版本:

void i8_gather_nd_s(int8_t *input, int8_t *output, int *input_shape, int input_ndim, int *indices, int *indices_shape, int indices_ndim, int core_mask)
void i16_gather_nd_s(int16_t *input, int16_t *output, int *input_shape, int input_ndim, int *indices, int *indices_shape, int indices_ndim, int core_mask)
void i32_gather_nd_s(int *input, int *output, int *input_shape, int input_ndim, int *indices, int *indices_shape, int indices_ndim, int core_mask)
void hp_gather_nd_s(half *input, half *output, int *input_shape, int input_ndim, int *indices, int *indices_shape, int indices_ndim, int core_mask)
void fp_gather_nd_s(float *input, float *output, int *input_shape, int input_ndim, int *indices, int *indices_shape, int indices_ndim, int core_mask)
void dp_gather_nd_s(double *input, double *output, int *input_shape, int input_ndim, int *indices, int *indices_shape, int indices_ndim, int core_mask)
void c64_gather_nd_s(float *input, float *output, int *input_shape, int input_ndim, int *indices, int *indices_shape, int indices_ndim, int core_mask)
void c128_gather_nd_s(double *input, double *output, int *input_shape, int input_ndim, int *indices, int *indices_shape, int indices_ndim, int core_mask)

C调用示例：

 1// FT78NE 示例（共享存储）
 2#include <stdio.h>
 3#include "78NE/utils.h"
 4
 5int main() {
 6    float *input = (float *)0xA0000000;    // 输入在 DDR 空间
 7    float *output = (float *)0xB0000000;   // 输出在 DDR 空间
 8    int *indices = (int *)0xC0000000;      // 索引在 DDR 空间
 9    int input_shape[] = {10, 10, 5};
10    int indices_shape[] = {3, 2};          // 提取3个坐标，每个坐标深度为2
11    int input_ndim = 3;
12    int indices_ndim = 2;
13    int core_mask = 0xFF;
14
15    fp_gather_nd_s(input, output, input_shape, input_ndim, indices, indices_shape, indices_ndim, core_mask);
16    return 0;
17}

私有存储版本:

void i8_gather_nd_p(int8_t *input, int8_t *output, int *input_shape, int input_ndim, int *indices, int *indices_shape, int indices_ndim)
void i16_gather_nd_p(int16_t *input, int16_t *output, int *input_shape, int input_ndim, int *indices, int *indices_shape, int indices_ndim)
void i32_gather_nd_p(int *input, int *output, int *input_shape, int input_ndim, int *indices, int *indices_shape, int indices_ndim)
void hp_gather_nd_p(half *input, half *output, int *input_shape, int input_ndim, int *indices, int *indices_shape, int indices_ndim)
void fp_gather_nd_p(float *input, float *output, int *input_shape, int input_ndim, int *indices, int *indices_shape, int indices_ndim)
void dp_gather_nd_p(double *input, double *output, int *input_shape, int input_ndim, int *indices, int *indices_shape, int indices_ndim)
void c64_gather_nd_p(float *input, float *output, int *input_shape, int input_ndim, int *indices, int *indices_shape, int indices_ndim)
void c128_gather_nd_p(double *input, double *output, int *input_shape, int input_ndim, int *indices, int *indices_shape, int indices_ndim)

C调用示例：

 1// MT7004 示例（私有存储）
 2#include <stdio.h>
 3
 4int main() {
 5    float *input = (float *)0x10000000;
 6    float *output = (float *)0x10010000;
 7    int *indices = (int *)0x10020000;
 8    int input_shape[] = {4, 5, 6};
 9    int indices_shape[] = {2, 2, 2};
10    int input_ndim = 3;
11    int indices_ndim = 3;
12
13    fp_gather_nd_p(input, output, input_shape, input_ndim, indices, indices_shape, indices_ndim);
14    return 0;
15}