Functions
arm_status	arm_fully_connected_mat_q7_vec_q15 (const q15_t pV, const q7_t pM, const uint16_t dim_vec, const uint16_t num_of_rows, const uint16_t bias_shift, const uint16_t out_shift, const q7_t bias, q15_t pOut, q15_t *vec_buffer)
	Mixed Q15-Q7 fully-connected layer function. More...

arm_status	arm_fully_connected_mat_q7_vec_q15_opt (const q15_t pV, const q7_t pM, const uint16_t dim_vec, const uint16_t num_of_rows, const uint16_t bias_shift, const uint16_t out_shift, const q7_t bias, q15_t pOut, q15_t *vec_buffer)
	Mixed Q15-Q7 opt fully-connected layer function. More...

arm_status	arm_fully_connected_q15 (const q15_t pV, const q15_t pM, const uint16_t dim_vec, const uint16_t num_of_rows, const uint16_t bias_shift, const uint16_t out_shift, const q15_t bias, q15_t pOut, q15_t *vec_buffer)
	Q15 opt fully-connected layer function. More...

arm_status	arm_fully_connected_q15_opt (const q15_t pV, const q15_t pM, const uint16_t dim_vec, const uint16_t num_of_rows, const uint16_t bias_shift, const uint16_t out_shift, const q15_t bias, q15_t pOut, q15_t *vec_buffer)
	Q15 opt fully-connected layer function. More...

arm_status	arm_fully_connected_q7 (const q7_t pV, const q7_t pM, const uint16_t dim_vec, const uint16_t num_of_rows, const uint16_t bias_shift, const uint16_t out_shift, const q7_t bias, q7_t pOut, q15_t *vec_buffer)
	Q7 basic fully-connected layer function. More...

arm_status	arm_fully_connected_q7_opt (const q7_t pV, const q7_t pM, const uint16_t dim_vec, const uint16_t num_of_rows, const uint16_t bias_shift, const uint16_t out_shift, const q7_t bias, q7_t pOut, q15_t *vec_buffer)
	Q7 opt fully-connected layer function. More...

Description

Perform fully-connected layer

Fully-connected layer is basically a matrix-vector multiplication with bias. The matrix is the weights and the input/output vectors are the activation values. Supported {weight, activation} precisions include {8-bit, 8-bit}, {16-bit, 16-bit}, and {8-bit, 16-bit}.

Here we have two types of kernel functions. The basic function implements the function using regular GEMV approach. The opt functions operates with weights in interleaved formats.

Function Documentation

arm_status arm_fully_connected_mat_q7_vec_q15	(	const q15_t *	pV,
		const q7_t *	pM,
		const uint16_t	dim_vec,
		const uint16_t	num_of_rows,
		const uint16_t	bias_shift,
		const uint16_t	out_shift,
		const q7_t *	bias,
		q15_t *	pOut,
		q15_t *	vec_buffer
	)

Parameters

[in]	pV	pointer to input vector
[in]	pM	pointer to matrix weights
[in]	dim_vec	length of the vector
[in]	num_of_rows	number of rows in weight matrix
[in]	bias_shift	amount of left-shift for bias
[in]	out_shift	amount of right-shift for output
[in]	bias	pointer to bias
[in,out]	pOut	pointer to output vector
[in,out]	vec_buffer	pointer to buffer space for input

Returns: The function returns ARM_MATH_SUCCESS

Buffer size:

vec_buffer size: 0

Q7_Q15 version of the fully connected layer

Weights are in q7_t and Activations are in q15_t

References NN_ROUND.

Referenced by gru_example().

arm_status arm_fully_connected_mat_q7_vec_q15_opt	(	const q15_t *	pV,
		const q7_t *	pM,
		const uint16_t	dim_vec,
		const uint16_t	num_of_rows,
		const uint16_t	bias_shift,
		const uint16_t	out_shift,
		const q7_t *	bias,
		q15_t *	pOut,
		q15_t *	vec_buffer
	)

Parameters

[in]	pV	pointer to input vector
[in]	pM	pointer to matrix weights
[in]	dim_vec	length of the vector
[in]	num_of_rows	number of rows in weight matrix
[in]	bias_shift	amount of left-shift for bias
[in]	out_shift	amount of right-shift for output
[in]	bias	pointer to bias
[in,out]	pOut	pointer to output vector
[in,out]	vec_buffer	pointer to buffer space for input

Returns: The function returns ARM_MATH_SUCCESS

Buffer size:

vec_buffer size: 0

Q7_Q15 version of the fully connected layer

Weights are in q7_t and Activations are in q15_t

Limitation: x4 version requires weight reordering to work

Here we use only one pointer to read 4 rows in the weight matrix. So if the original q7_t matrix looks like this:

| a11 | a12 | a13 | a14 | a15 | a16 | a17 |

| a21 | a22 | a23 | a24 | a25 | a26 | a27 |

| a31 | a32 | a33 | a34 | a35 | a36 | a37 |

| a41 | a42 | a43 | a44 | a45 | a46 | a47 |

| a51 | a52 | a53 | a54 | a55 | a56 | a57 |

| a61 | a62 | a63 | a64 | a65 | a66 | a67 |

We operates on multiple-of-4 rows, so the first four rows becomes

| a11 | a21 | a12 | a22 | a31 | a41 | a32 | a42 |

| a13 | a23 | a14 | a24 | a33 | a43 | a34 | a44 |

| a15 | a25 | a16 | a26 | a35 | a45 | a36 | a46 |

The column left over will be in-order. which is: | a17 | a27 | a37 | a47 |

For the left-over rows, we do 1x1 computation, so the data remains as its original order.

So the stored weight matrix looks like this:

| a11 | a21 | a12 | a22 | a31 | a41 |

| a32 | a42 | a13 | a23 | a14 | a24 |

| a33 | a43 | a34 | a44 | a15 | a25 |

| a16 | a26 | a35 | a45 | a36 | a46 |

| a17 | a27 | a37 | a47 | a51 | a52 |

| a53 | a54 | a55 | a56 | a57 | a61 |

| a62 | a63 | a64 | a65 | a66 | a67 |

References NN_ROUND.

Referenced by gru_example().

arm_status arm_fully_connected_q15	(	const q15_t *	pV,
		const q15_t *	pM,
		const uint16_t	dim_vec,
		const uint16_t	num_of_rows,
		const uint16_t	bias_shift,
		const uint16_t	out_shift,
		const q15_t *	bias,
		q15_t *	pOut,
		q15_t *	vec_buffer
	)

Q15 basic fully-connected layer function.

Parameters

[in]	pV	pointer to input vector
[in]	pM	pointer to matrix weights
[in]	dim_vec	length of the vector
[in]	num_of_rows	number of rows in weight matrix
[in]	bias_shift	amount of left-shift for bias
[in]	out_shift	amount of right-shift for output
[in]	bias	pointer to bias
[in,out]	pOut	pointer to output vector
[in,out]	vec_buffer	pointer to buffer space for input

Returns: The function returns ARM_MATH_SUCCESS

Buffer size:

vec_buffer size: 0

References NN_ROUND.

arm_status arm_fully_connected_q15_opt	(	const q15_t *	pV,
		const q15_t *	pM,
		const uint16_t	dim_vec,
		const uint16_t	num_of_rows,
		const uint16_t	bias_shift,
		const uint16_t	out_shift,
		const q15_t *	bias,
		q15_t *	pOut,
		q15_t *	vec_buffer
	)

Parameters

[in]	pV	pointer to input vector
[in]	pM	pointer to matrix weights
[in]	dim_vec	length of the vector
[in]	num_of_rows	number of rows in weight matrix
[in]	bias_shift	amount of left-shift for bias
[in]	out_shift	amount of right-shift for output
[in]	bias	pointer to bias
[in,out]	pOut	pointer to output vector
[in,out]	vec_buffer	pointer to buffer space for input

Returns: The function returns ARM_MATH_SUCCESS

Buffer size:

vec_buffer size: 0

Here we use only one pointer to read 4 rows in the weight matrix. So if the original matrix looks like this:

| a11 | a12 | a13 |

| a21 | a22 | a23 |

| a31 | a32 | a33 |

| a41 | a42 | a43 |

| a51 | a52 | a53 |

| a61 | a62 | a63 |

We operates on multiple-of-4 rows, so the first four rows becomes

| a11 | a12 | a21 | a22 | a31 | a32 | a41 | a42 |

| a13 | a23 | a33 | a43 |

Remaining rows are kept the same original order.

So the stored weight matrix looks like this:

| a11 | a12 | a21 | a22 | a31 | a32 | a41 | a42 |

| a13 | a23 | a33 | a43 | a51 | a52 | a53 | a61 |

| a62 | a63 |

References NN_ROUND.

arm_status arm_fully_connected_q7	(	const q7_t *	pV,
		const q7_t *	pM,
		const uint16_t	dim_vec,
		const uint16_t	num_of_rows,
		const uint16_t	bias_shift,
		const uint16_t	out_shift,
		const q7_t *	bias,
		q7_t *	pOut,
		q15_t *	vec_buffer
	)

Parameters

[in]	pV	pointer to input vector
[in]	pM	pointer to matrix weights
[in]	dim_vec	length of the vector
[in]	num_of_rows	number of rows in weight matrix
[in]	bias_shift	amount of left-shift for bias
[in]	out_shift	amount of right-shift for output
[in]	bias	pointer to bias
[in,out]	pOut	pointer to output vector
[in,out]	vec_buffer	pointer to buffer space for input

Returns: The function returns ARM_MATH_SUCCESS

Buffer size:

vec_buffer size: dim_vec

This basic function is designed to work with regular weight matrix without interleaving.

References arm_q7_to_q15_reordered_no_shift(), and NN_ROUND.

arm_status arm_fully_connected_q7_opt	(	const q7_t *	pV,
		const q7_t *	pM,
		const uint16_t	dim_vec,
		const uint16_t	num_of_rows,
		const uint16_t	bias_shift,
		const uint16_t	out_shift,
		const q7_t *	bias,
		q7_t *	pOut,
		q15_t *	vec_buffer
	)

Parameters

[in]	pV	pointer to input vector
[in]	pM	pointer to matrix weights
[in]	dim_vec	length of the vector
[in]	num_of_rows	number of rows in weight matrix
[in]	bias_shift	amount of left-shift for bias
[in]	out_shift	amount of right-shift for output
[in]	bias	pointer to bias
[in,out]	pOut	pointer to output vector
[in,out]	vec_buffer	pointer to buffer space for input

Returns: The function returns ARM_MATH_SUCCESS

Buffer size:

vec_buffer size: dim_vec

This opt function is designed to work with interleaved weight matrix. The vector input is assumed in q7_t format, we call arm_q7_to_q15_no_shift_shuffle function to expand into q15_t format with certain weight re-ordering, refer to the function comments for more details. Here we use only one pointer to read 4 rows in the weight matrix. So if the original q7_t matrix looks like this:

| a11 | a12 | a13 | a14 | a15 | a16 | a17 |

| a21 | a22 | a23 | a24 | a25 | a26 | a27 |

| a31 | a32 | a33 | a34 | a35 | a36 | a37 |

| a41 | a42 | a43 | a44 | a45 | a46 | a47 |

| a51 | a52 | a53 | a54 | a55 | a56 | a57 |

| a61 | a62 | a63 | a64 | a65 | a66 | a67 |

We operates on multiple-of-4 rows, so the first four rows becomes

| a11 | a21 | a13 | a23 | a31 | a41 | a33 | a43 |

| a12 | a22 | a14 | a24 | a32 | a42 | a34 | a44 |

| a15 | a25 | a35 | a45 | a16 | a26 | a36 | a46 |

So within the kernel, we first read the re-ordered vector in as:

| b1 | b3 | and | b2 | b4 |

the four q31_t weights will look like

| a11 | a13 |, | a21 | a23 |, | a31 | a33 |, | a41 | a43 |

| a12 | a14 |, | a22 | a24 |, | a32 | a34 |, | a42 | a44 |

The column left over will be in-order. which is:

| a17 | a27 | a37 | a47 |

For the left-over rows, we do 1x1 computation, so the data remains as its original order.

So the stored weight matrix looks like this:

| a11 | a21 | a13 | a23 | a31 | a41 |

| a33 | a43 | a12 | a22 | a14 | a24 |

| a32 | a42 | a34 | a44 | a15 | a25 |

| a35 | a45 | a16 | a26 | a36 | a46 |

| a17 | a27 | a37 | a47 | a51 | a52 |

| a53 | a54 | a55 | a56 | a57 | a61 |

| a62 | a63 | a64 | a65 | a66 | a67 |

References arm_q7_to_q15_reordered_no_shift(), and NN_ROUND.

Referenced by main().

Functions

Description

Function Documentation