aclblasGemvEx

Applicability

Product	Supported
Atlas 350 Accelerator Card	√
Atlas A3 training product / Atlas A3 inference product	√
Atlas A2 training product / Atlas A2 inference product	√
Atlas 200I/500 A2 inference product	√
Atlas inference product	√
Atlas training product	√

Function Usage

Computes matrix-vector multiplication: y = αAx + βy. The data types of the input and output data are set using arguments. This API is asynchronous.

A, x, and y support a limited combination of data types, where α and β have the same data types as y.

Data Type of A	Data Type of x	Data Type of y
aclFloat16	aclFloat16	aclFloat16
aclFloat16	aclFloat16	float(float32)
int8_t	int8_t	float(float32)
int8_t	int8_t	int32_t

Prototype

      
       
         
         
           aclError aclblasGemvEx(aclTransType transA,
int m,
int n,
const void *alpha,
const void *a,
int lda,
aclDataType dataTypeA,
const void *x,
int incx,
aclDataType dataTypeX,
const void *beta,
void *y,
int incy,
aclDataType dataTypeY,
aclComputeType type,
aclrtStream stream)

          

        

      
     

Parameters

Parameter	Input/Output	Description
transA	Input	Transpose flag of matrix A. For details about the type definition, see aclTransType.
m	Input	Number of rows in matrix A (row-major first in data storing).
n	Input	Number of columns in matrix A.
alpha	Input	Pointer to scalar α used for executing the multiplication operation.
a	Input	Pointer to matrix A.
lda	Input	Leading dimension of matrix A. For row-major transpose, lda is the number of columns of matrix A. This parameter is reserved and can only be set to –1.
dataTypeA	Input	Data type of matrix A. For details about the type definition, see aclDataType.
x	Input	Pointer to vector x.
incx	Input	Increment between successive x elements. This parameter is reserved and can only be set to –1.
dataTypeX	Input	Data type of vector x. For details about the type definition, see aclDataType.
beta	Input	Pointer to scalar β used for executing the multiplication operation.
y	Input and output	Pointer to vector y.
incy	Input	Increment between successive y elements. This parameter is reserved and can only be set to –1.
dataTypeY	Input	Data type of vector y. For details about the type definition, see aclDataType.
type	Input	Computation precision type (high precision by default). For details about the type definition, see aclComputeType.
stream	Input	Stream where the operator is executed. For details about the type definition, see aclrtStream.

Returns

0 on success; else, failure. For details, see aclError.

Parent topic: CBLAS APIs