mlib_MatrixMulShift_S16_S16_Mod(3MLIB) mediaLib Library Functions mlib_MatrixMulShift_S16_S16_Mod(3MLIB)
NAME
mlib_MatrixMulShift_S16_S16_Mod, mlib_MatrixMulShift_S16_S16_Sat, mlib_MatrixMulShift_S16C_S16C_Mod, mlib_MatrixMulShift_S16C_S16C_Sat -
matrix multiplication plus shifting
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_MatrixMulShift_S16_S16_Mod(mlib_s16 *z, const mlib_s16 *x, const mlib_s16 *y, mlib_s32 m, mlib_s32 l, mlib_s32 n, mlib_s32
shift);
mlib_status mlib_MatrixMulShift_S16_S16_Sat(mlib_s16 *z, const mlib_s16 *x, const mlib_s16 *y, mlib_s32 m, mlib_s32 l, mlib_s32 n, mlib_s32
shift);
mlib_status mlib_MatrixMulShift_S16C_S16C_Mod(mlib_s16 *z, const mlib_s16 *x, const mlib_s16 *y, mlib_s32 m, mlib_s32 l, mlib_s32 n,
mlib_s32 shift);
mlib_status mlib_MatrixMulShift_S16C_S16C_Sat(mlib_s16 *z, const mlib_s16 *x, const mlib_s16 *y, mlib_s32 m, mlib_s32 l, mlib_s32 n,
mlib_s32 shift);
DESCRIPTION
Each of these functions performs a multiplication of two matrices and shifts the result.
For real data, the following equation is used:
l-1
z[i*n + j] = {SUM (x[i*l + k] * y[k*n + j])} * 2**(-shift)
k=0
where i = 0, 1, ..., (m - 1); j = 0, 1, ..., (n - 1).
For complex data, the following equation is used:
l-1
z[2*(i*n + j)] = {SUM (xR*yR - xI*yI)} * 2**(-shift)
k=0
l-1
z[2*(i*n + j) + 1] = {SUM (xR*yI + xI*yR)} * 2**(-shift)
k=0
where
xR = x[2*(i*l + k)]
xI = x[2*(i*l + k) + 1]
yR = y[2*(k*n + j)]
yI = y[2*(k*n + j) + 1]
i = 0, 1, ..., (m - 1)
j = 0, 1, ..., (n - 1)
PARAMETERS
Each of the functions takes the following arguments:
z Pointer to the first element of the result matrix, in row major order.
x Pointer to the first element of the first matrix, in row major order.
y Pointer to the first element of the second matrix, in row major order.
m Number of rows in the first matrix. m > 0.
l Number of columns in the first matrix, and the number of rows in the second matrix. l > 0.
n Number of columns in the second matrix. n > 0.
shift Right shifting factor. 1 <= shift <= 16.
RETURN VALUES
Each of the functions returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Evolving |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
mlib_MatrixMul_U8_U8_Mod(3MLIB), attributes(5)
SunOS 5.10 10 Nov 2004 mlib_MatrixMulShift_S16_S16_Mod(3MLIB)