diff options
Diffstat (limited to 'Drivers/CMSIS/NN/Source/ConvolutionFunctions/arm_convolve_HWC_q7_RGB.c')
| -rw-r--r-- | Drivers/CMSIS/NN/Source/ConvolutionFunctions/arm_convolve_HWC_q7_RGB.c | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/Drivers/CMSIS/NN/Source/ConvolutionFunctions/arm_convolve_HWC_q7_RGB.c b/Drivers/CMSIS/NN/Source/ConvolutionFunctions/arm_convolve_HWC_q7_RGB.c new file mode 100644 index 0000000..e53c6f9 --- /dev/null +++ b/Drivers/CMSIS/NN/Source/ConvolutionFunctions/arm_convolve_HWC_q7_RGB.c @@ -0,0 +1,279 @@ +/*
+ * Copyright (C) 2010-2018 Arm Limited or its affiliates. All rights reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the License); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* ----------------------------------------------------------------------
+ * Project: CMSIS NN Library
+ * Title: arm_convolve_HWC_q7_RGB.c
+ * Description: Q7 version of convolution for RGB image
+ *
+ * $Date: 17. January 2018
+ * $Revision: V.1.0.0
+ *
+ * Target Processor: Cortex-M cores
+ *
+ * -------------------------------------------------------------------- */
+#include "arm_math.h"
+#include "arm_nnfunctions.h"
+
+/**
+ * @ingroup groupNN
+ */
+
+/**
+ * @addtogroup NNConv
+ * @{
+ */
+
+ /**
+ * @brief Q7 convolution function for RGB image
+ * @param[in] Im_in pointer to input tensor
+ * @param[in] dim_im_in input tensor dimention
+ * @param[in] ch_im_in number of input tensor channels
+ * @param[in] wt pointer to kernel weights
+ * @param[in] ch_im_out number of filters, i.e., output tensor channels
+ * @param[in] dim_kernel filter kernel size
+ * @param[in] padding padding sizes
+ * @param[in] stride convolution stride
+ * @param[in] bias pointer to bias
+ * @param[in] bias_shift amount of left-shift for bias
+ * @param[in] out_shift amount of right-shift for output
+ * @param[in,out] Im_out pointer to output tensor
+ * @param[in] dim_im_out output tensor dimension
+ * @param[in,out] bufferA pointer to buffer space for input
+ * @param[in,out] bufferB pointer to buffer space for output
+ * @return The function returns either
+ * <code>ARM_MATH_SIZE_MISMATCH</code> or <code>ARM_MATH_SUCCESS</code> based on the outcome of size checking.
+ *
+ * @details
+ *
+ * <b>Buffer size:</b>
+ *
+ * bufferA size: 2*ch_im_in*dim_kernel*dim_kernel
+ *
+ * bufferB size: 0
+ *
+ * <b>Input dimension constraints:</b>
+ *
+ * ch_im_in equals 3
+ *
+ * This kernel is written exclusively for convolution with ch_im_in
+ * equals 3. This applies on the first layer of CNNs which has input
+ * image with RGB format.
+ */
+
+arm_status
+arm_convolve_HWC_q7_RGB(const q7_t * Im_in,
+ const uint16_t dim_im_in,
+ const uint16_t ch_im_in,
+ const q7_t * wt,
+ const uint16_t ch_im_out,
+ const uint16_t dim_kernel,
+ const uint16_t padding,
+ const uint16_t stride,
+ const q7_t * bias,
+ const uint16_t bias_shift,
+ const uint16_t out_shift,
+ q7_t * Im_out, const uint16_t dim_im_out, q15_t * bufferA, q7_t * bufferB)
+{
+
+#if defined (ARM_MATH_DSP)
+ /* Run the following code for Cortex-M4 and Cortex-M7 */
+ int16_t i_out_y, i_out_x, i_ker_y, i_ker_x;
+
+ /*
+ * Here we use bufferA as q15_t internally as computation are done with q15_t level
+ * im2col are done to output in q15_t format from q7_t input
+ */
+ q15_t *pBuffer = bufferA;
+ q7_t *pOut = Im_out;
+
+ // check if number of input channels is 3
+ if (ch_im_in != 3)
+ {
+ return ARM_MATH_SIZE_MISMATCH;
+ }
+ // This part implements the im2col function
+ for (i_out_y = 0; i_out_y < dim_im_out; i_out_y++)
+ {
+ for (i_out_x = 0; i_out_x < dim_im_out; i_out_x++)
+ {
+ for (i_ker_y = i_out_y * stride - padding; i_ker_y < i_out_y * stride - padding + dim_kernel; i_ker_y++)
+ {
+ for (i_ker_x = i_out_x * stride - padding; i_ker_x < i_out_x * stride - padding + dim_kernel; i_ker_x++)
+ {
+ if (i_ker_y < 0 || i_ker_y >= dim_im_in || i_ker_x < 0 || i_ker_x >= dim_im_in)
+ {
+ /* Equivalent to arm_fill_q15(0, pBuffer, ch_im_in) with assumption: ch_im_in = 3 */
+ *__SIMD32(pBuffer) = 0x0;
+ *(pBuffer + 2) = 0;
+ pBuffer += 3;
+ } else
+ {
+ /*
+ * Equivalent to:
+ * arm_q7_to_q15_no_shift( (q7_t*)Im_in+(i_ker_y*dim_im_in+i_ker_x)*3, pBuffer, 3);
+ */
+
+ const q7_t *pPixel = Im_in + (i_ker_y * dim_im_in + i_ker_x) * 3;
+ q31_t buf = *__SIMD32(pPixel);
+
+ union arm_nnword top;
+ union arm_nnword bottom;
+
+ top.word = __SXTB16(buf);
+ bottom.word = __SXTB16(__ROR(buf, 8));
+
+#ifndef ARM_MATH_BIG_ENDIAN
+ /*
+ * little-endian, | omit | 3rd | 2nd | 1st |
+ * MSB LSB
+ * top | 3rd | 1st |; bottom | omit | 2nd |
+ *
+ * version 1, need to swap 2nd and 3rd weight
+ * *__SIMD32(pBuffer) = top.word;
+ * *(pBuffer+2) = bottom.half_words[0];
+ *
+ * version 2, no weight shuffling required
+ */
+ *pBuffer++ = top.half_words[0];
+ *__SIMD32(pBuffer) = __PKHBT(bottom.word, top.word, 0);
+#else
+ /*
+ * big-endian, | 1st | 2nd | 3rd | omit |
+ * MSB LSB
+ * top | 2nd | omit |; bottom | 1st | 3rd |
+ *
+ * version 1, need to swap 2nd and 3rd weight
+ * *__SIMD32(pBuffer) = bottom.word;
+ * *(pBuffer+2) = top.half_words[1];
+ *
+ * version 2, no weight shuffling required
+ */
+ *pBuffer++ = bottom.half_words[0];
+ *__SIMD32(pBuffer) = __PKHTB(top.word, bottom.word, 0);
+#endif
+ pBuffer += 2;
+ }
+ }
+ }
+
+ if (pBuffer == bufferA + 2 * 3 * dim_kernel * dim_kernel)
+ {
+ pOut =
+ arm_nn_mat_mult_kernel_q7_q15(wt, bufferA,
+ ch_im_out,
+ 3 * dim_kernel * dim_kernel, bias_shift, out_shift, bias, pOut);
+
+ /* counter reset */
+ pBuffer = bufferA;
+ }
+ }
+ }
+
+ /* left-over because odd number of output pixels */
+ if (pBuffer != bufferA)
+ {
+ const q7_t *pA = wt;
+ int i;
+
+ for (i = 0; i < ch_im_out; i++)
+ {
+ q31_t sum = ((q31_t)bias[i] << bias_shift) + NN_ROUND(out_shift);
+ q15_t *pB = bufferA;
+ /* basically each time it process 4 entries */
+ uint16_t colCnt = 3 * dim_kernel * dim_kernel >> 2;
+
+ while (colCnt)
+ {
+
+ q31_t inA1, inA2;
+ q31_t inB1, inB2;
+
+ pA = (q7_t *) read_and_pad((void *)pA, &inA1, &inA2);
+
+ inB1 = *__SIMD32(pB)++;
+ sum = __SMLAD(inA1, inB1, sum);
+ inB2 = *__SIMD32(pB)++;
+ sum = __SMLAD(inA2, inB2, sum);
+
+ colCnt--;
+ }
+ colCnt = 3 * dim_kernel * dim_kernel & 0x3;
+ while (colCnt)
+ {
+ q7_t inA1 = *pA++;
+ q15_t inB1 = *pB++;
+ sum += inA1 * inB1;
+ colCnt--;
+ }
+ *pOut++ = (q7_t) __SSAT((sum >> out_shift), 8);
+ }
+ }
+#else
+ /* Run the following code as reference implementation for Cortex-M0 and Cortex-M3 */
+
+ uint16_t i, j, k, l, m, n;
+ int conv_out;
+ signed char in_row, in_col;
+
+ // check if number of input channels is 3
+ if (ch_im_in != 3)
+ {
+ return ARM_MATH_SIZE_MISMATCH;
+ }
+
+ for (i = 0; i < ch_im_out; i++)
+ {
+ for (j = 0; j < dim_im_out; j++)
+ {
+ for (k = 0; k < dim_im_out; k++)
+ {
+ conv_out = (bias[i] << bias_shift) + NN_ROUND(out_shift);
+ for (m = 0; m < dim_kernel; m++)
+ {
+ for (n = 0; n < dim_kernel; n++)
+ {
+ /* if-for implementation */
+ in_row = stride * j + m - padding;
+ in_col = stride * k + n - padding;
+ if (in_row >= 0 && in_col >= 0 && in_row < dim_im_in && in_col < dim_im_in)
+ {
+ for (l = 0; l < ch_im_in; l++)
+ {
+ conv_out +=
+ Im_in[(in_row * dim_im_in + in_col) * ch_im_in +
+ l] * wt[i * ch_im_in * dim_kernel * dim_kernel + (m * dim_kernel +
+ n) * ch_im_in + l];
+ }
+ }
+ }
+ }
+ Im_out[i + (j * dim_im_out + k) * ch_im_out] = (q7_t) __SSAT((conv_out >> out_shift), 8);
+ }
+ }
+ }
+
+#endif /* ARM_MATH_DSP */
+
+ /* Return to application */
+ return (ARM_MATH_SUCCESS);
+}
+
+/**
+ * @} end of NNConv group
+ */
|