|
|
/* ----------------------------------------------------------------------
|
|
|
* Copyright (C) 2010 ARM Limited. All rights reserved.
|
|
|
*
|
|
|
* $Date: 15. July 2011
|
|
|
* $Revision: V1.0.10
|
|
|
*
|
|
|
* Project: CMSIS DSP Library
|
|
|
* Title: arm_mat_mult_f32.c
|
|
|
*
|
|
|
* Description: Floating-point matrix multiplication.
|
|
|
*
|
|
|
* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
|
|
|
*
|
|
|
* Version 1.0.10 2011/7/15
|
|
|
* Big Endian support added and Merged M0 and M3/M4 Source code.
|
|
|
*
|
|
|
* Version 1.0.3 2010/11/29
|
|
|
* Re-organized the CMSIS folders and updated documentation.
|
|
|
*
|
|
|
* Version 1.0.2 2010/11/11
|
|
|
* Documentation updated.
|
|
|
*
|
|
|
* Version 1.0.1 2010/10/05
|
|
|
* Production release and review comments incorporated.
|
|
|
*
|
|
|
* Version 1.0.0 2010/09/20
|
|
|
* Production release and review comments incorporated.
|
|
|
*
|
|
|
* Version 0.0.5 2010/04/26
|
|
|
* incorporated review comments and updated with latest CMSIS layer
|
|
|
*
|
|
|
* Version 0.0.3 2010/03/10
|
|
|
* Initial version
|
|
|
* -------------------------------------------------------------------- */
|
|
|
|
|
|
#include "arm_math.h"
|
|
|
|
|
|
/**
|
|
|
* @ingroup groupMatrix
|
|
|
*/
|
|
|
|
|
|
/**
|
|
|
* @defgroup MatrixMult Matrix Multiplication
|
|
|
*
|
|
|
* Multiplies two matrices.
|
|
|
*
|
|
|
* \image html MatrixMultiplication.gif "Multiplication of two 3 x 3 matrices"
|
|
|
|
|
|
* Matrix multiplication is only defined if the number of columns of the
|
|
|
* first matrix equals the number of rows of the second matrix.
|
|
|
* Multiplying an <code>M x N</code> matrix with an <code>N x P</code> matrix results
|
|
|
* in an <code>M x P</code> matrix.
|
|
|
* When matrix size checking is enabled, the functions check: (1) that the inner dimensions of
|
|
|
* <code>pSrcA</code> and <code>pSrcB</code> are equal; and (2) that the size of the output
|
|
|
* matrix equals the outer dimensions of <code>pSrcA</code> and <code>pSrcB</code>.
|
|
|
*/
|
|
|
|
|
|
|
|
|
/**
|
|
|
* @addtogroup MatrixMult
|
|
|
* @{
|
|
|
*/
|
|
|
|
|
|
/**
|
|
|
* @brief Floating-point matrix multiplication.
|
|
|
* @param[in] *pSrcA points to the first input matrix structure
|
|
|
* @param[in] *pSrcB points to the second input matrix structure
|
|
|
* @param[out] *pDst points to output matrix structure
|
|
|
* @return The function returns either
|
|
|
* <code>ARM_MATH_SIZE_MISMATCH</code> or <code>ARM_MATH_SUCCESS</code> based on the outcome of size checking.
|
|
|
*/
|
|
|
|
|
|
arm_status arm_mat_mult_f32(
|
|
|
const arm_matrix_instance_f32 * pSrcA,
|
|
|
const arm_matrix_instance_f32 * pSrcB,
|
|
|
arm_matrix_instance_f32 * pDst)
|
|
|
{
|
|
|
float32_t *pIn1 = pSrcA->pData; /* input data matrix pointer A */
|
|
|
float32_t *pIn2 = pSrcB->pData; /* input data matrix pointer B */
|
|
|
float32_t *pInA = pSrcA->pData; /* input data matrix pointer A */
|
|
|
float32_t *pOut = pDst->pData; /* output data matrix pointer */
|
|
|
float32_t *px; /* Temporary output data matrix pointer */
|
|
|
float32_t sum; /* Accumulator */
|
|
|
uint16_t numRowsA = pSrcA->numRows; /* number of rows of input matrix A */
|
|
|
uint16_t numColsB = pSrcB->numCols; /* number of columns of input matrix B */
|
|
|
uint16_t numColsA = pSrcA->numCols; /* number of columns of input matrix A */
|
|
|
|
|
|
#ifndef ARM_MATH_CM0
|
|
|
|
|
|
/* Run the below code for Cortex-M4 and Cortex-M3 */
|
|
|
|
|
|
uint16_t col, i = 0u, j, row = numRowsA, colCnt; /* loop counters */
|
|
|
arm_status status; /* status of matrix multiplication */
|
|
|
|
|
|
#ifdef ARM_MATH_MATRIX_CHECK
|
|
|
|
|
|
|
|
|
/* Check for matrix mismatch condition */
|
|
|
if((pSrcA->numCols != pSrcB->numRows) ||
|
|
|
(pSrcA->numRows != pDst->numRows) || (pSrcB->numCols != pDst->numCols))
|
|
|
{
|
|
|
|
|
|
/* Set status as ARM_MATH_SIZE_MISMATCH */
|
|
|
status = ARM_MATH_SIZE_MISMATCH;
|
|
|
}
|
|
|
else
|
|
|
#endif /* #ifdef ARM_MATH_MATRIX_CHECK */
|
|
|
|
|
|
{
|
|
|
/* The following loop performs the dot-product of each row in pSrcA with each column in pSrcB */
|
|
|
/* row loop */
|
|
|
do
|
|
|
{
|
|
|
/* Output pointer is set to starting address of the row being processed */
|
|
|
px = pOut + i;
|
|
|
|
|
|
/* For every row wise process, the column loop counter is to be initiated */
|
|
|
col = numColsB;
|
|
|
|
|
|
/* For every row wise process, the pIn2 pointer is set
|
|
|
** to the starting address of the pSrcB data */
|
|
|
pIn2 = pSrcB->pData;
|
|
|
|
|
|
j = 0u;
|
|
|
|
|
|
/* column loop */
|
|
|
do
|
|
|
{
|
|
|
/* Set the variable sum, that acts as accumulator, to zero */
|
|
|
sum = 0.0f;
|
|
|
|
|
|
/* Initiate the pointer pIn1 to point to the starting address of the column being processed */
|
|
|
pIn1 = pInA;
|
|
|
|
|
|
/* Apply loop unrolling and compute 4 MACs simultaneously. */
|
|
|
colCnt = numColsA >> 2;
|
|
|
|
|
|
/* matrix multiplication */
|
|
|
while(colCnt > 0u)
|
|
|
{
|
|
|
/* c(m,n) = a(1,1)*b(1,1) + a(1,2) * b(2,1) + .... + a(m,p)*b(p,n) */
|
|
|
sum += *pIn1++ * (*pIn2);
|
|
|
pIn2 += numColsB;
|
|
|
sum += *pIn1++ * (*pIn2);
|
|
|
pIn2 += numColsB;
|
|
|
sum += *pIn1++ * (*pIn2);
|
|
|
pIn2 += numColsB;
|
|
|
sum += *pIn1++ * (*pIn2);
|
|
|
pIn2 += numColsB;
|
|
|
|
|
|
/* Decrement the loop count */
|
|
|
colCnt--;
|
|
|
}
|
|
|
|
|
|
/* If the columns of pSrcA is not a multiple of 4, compute any remaining MACs here.
|
|
|
** No loop unrolling is used. */
|
|
|
colCnt = numColsA % 0x4u;
|
|
|
|
|
|
while(colCnt > 0u)
|
|
|
{
|
|
|
/* c(m,n) = a(1,1)*b(1,1) + a(1,2) * b(2,1) + .... + a(m,p)*b(p,n) */
|
|
|
sum += *pIn1++ * (*pIn2);
|
|
|
pIn2 += numColsB;
|
|
|
|
|
|
/* Decrement the loop counter */
|
|
|
colCnt--;
|
|
|
}
|
|
|
|
|
|
/* Store the result in the destination buffer */
|
|
|
*px++ = sum;
|
|
|
|
|
|
/* Update the pointer pIn2 to point to the starting address of the next column */
|
|
|
j++;
|
|
|
pIn2 = pSrcB->pData + j;
|
|
|
|
|
|
/* Decrement the column loop counter */
|
|
|
col--;
|
|
|
|
|
|
} while(col > 0u);
|
|
|
|
|
|
#else
|
|
|
|
|
|
/* Run the below code for Cortex-M0 */
|
|
|
|
|
|
float32_t *pInB = pSrcB->pData; /* input data matrix pointer B */
|
|
|
uint16_t col, i = 0u, row = numRowsA, colCnt; /* loop counters */
|
|
|
arm_status status; /* status of matrix multiplication */
|
|
|
|
|
|
#ifdef ARM_MATH_MATRIX_CHECK
|
|
|
|
|
|
/* Check for matrix mismatch condition */
|
|
|
if((pSrcA->numCols != pSrcB->numRows) ||
|
|
|
(pSrcA->numRows != pDst->numRows) || (pSrcB->numCols != pDst->numCols))
|
|
|
{
|
|
|
|
|
|
/* Set status as ARM_MATH_SIZE_MISMATCH */
|
|
|
status = ARM_MATH_SIZE_MISMATCH;
|
|
|
}
|
|
|
else
|
|
|
#endif /* #ifdef ARM_MATH_MATRIX_CHECK */
|
|
|
|
|
|
{
|
|
|
/* The following loop performs the dot-product of each row in pInA with each column in pInB */
|
|
|
/* row loop */
|
|
|
do
|
|
|
{
|
|
|
/* Output pointer is set to starting address of the row being processed */
|
|
|
px = pOut + i;
|
|
|
|
|
|
/* For every row wise process, the column loop counter is to be initiated */
|
|
|
col = numColsB;
|
|
|
|
|
|
/* For every row wise process, the pIn2 pointer is set
|
|
|
** to the starting address of the pSrcB data */
|
|
|
pIn2 = pSrcB->pData;
|
|
|
|
|
|
/* column loop */
|
|
|
do
|
|
|
{
|
|
|
/* Set the variable sum, that acts as accumulator, to zero */
|
|
|
sum = 0.0f;
|
|
|
|
|
|
/* Initialize the pointer pIn1 to point to the starting address of the row being processed */
|
|
|
pIn1 = pInA;
|
|
|
|
|
|
/* Matrix A columns number of MAC operations are to be performed */
|
|
|
colCnt = numColsA;
|
|
|
|
|
|
while(colCnt > 0u)
|
|
|
{
|
|
|
/* c(m,n) = a(1,1)*b(1,1) + a(1,2) * b(2,1) + .... + a(m,p)*b(p,n) */
|
|
|
sum += *pIn1++ * (*pIn2);
|
|
|
pIn2 += numColsB;
|
|
|
|
|
|
/* Decrement the loop counter */
|
|
|
colCnt--;
|
|
|
}
|
|
|
|
|
|
/* Store the result in the destination buffer */
|
|
|
*px++ = sum;
|
|
|
|
|
|
/* Decrement the column loop counter */
|
|
|
col--;
|
|
|
|
|
|
/* Update the pointer pIn2 to point to the starting address of the next column */
|
|
|
pIn2 = pInB + (numColsB - col);
|
|
|
|
|
|
} while(col > 0u);
|
|
|
|
|
|
#endif /* #ifndef ARM_MATH_CM0 */
|
|
|
|
|
|
/* Update the pointer pInA to point to the starting address of the next row */
|
|
|
i = i + numColsB;
|
|
|
pInA = pInA + numColsA;
|
|
|
|
|
|
/* Decrement the row loop counter */
|
|
|
row--;
|
|
|
|
|
|
} while(row > 0u);
|
|
|
/* Set status as ARM_MATH_SUCCESS */
|
|
|
status = ARM_MATH_SUCCESS;
|
|
|
}
|
|
|
|
|
|
/* Return to application */
|
|
|
return (status);
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* @} end of MatrixMult group
|
|
|
*/
|
|
|
|