v?Mul

Developer Reference for Intel® oneAPI Math Kernel Library for C

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ID 766684

Date 3/31/2023

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v?Mul

Performs element by element multiplication of vector a and vector b.

Syntax

vsMul( n, a, b, y );

vsMulI(n, a, inca, b, incb, y, incy);

vmsMul( n, a, b, y, mode );

vmsMulI(n, a, inca, b, incb, y, incy, mode);

vdMul( n, a, b, y );

vdMulI(n, a, inca, b, incb, y, incy);vdMulI(n, a, inca, b, incb, y, incy);

vmdMul( n, a, b, y, mode );

vmdMulI(n, a, inca, b, incb, y, incy, mode);

vcMul( n, a, b, y );

vcMulI(n, a, inca, b, incb, y, incy);

vmcMul( n, a, b, y, mode );

vmcMulI(n, a, inca, b, incb, y, incy, mode);

vzMul( n, a, b, y );

vzMulI(n, a, inca, b, incb, y, incy);

vmzMul( n, a, b, y, mode );

vmzMulI(n, a, inca, b, incb, y, incy, mode);

Include Files

mkl.h

Input Parameters

Name	Type	Description
n	const MKL_INT	Specifies the number of elements to be calculated.
a, b	const float* for vsMul, vmsMul const double* for vdMul, vmdMul const MKL_Complex8* for vcMul, vmcMul const MKL_Complex16* for vzMul, vmzMul	Pointers to arrays that contain the input vectors a and b.
inca, incb, incy	const MKL_INT	Specifies increments for the elements of `a`, `b`, and `y`.
mode	const MKL_INT64	Overrides global VM mode setting for this function call. See vmlSetMode for possible values and their description.

Output Parameters

Name	Type	Description
y	float* for vsMul, vmsMul double* for vdMul, vmdMul MKL_Complex8* for vcMul, vmcMul MKL_Complex16* for vzMul, vmzMul	Pointer to an array that contains the output vector y.

Name

Type

Description

float* for vsMul, vmsMul

double* for vdMul, vmdMul

MKL_Complex8* for vcMul, vmcMul

MKL_Complex16* for vzMul, vmzMul

Pointer to an array that contains the output vector y.

Description

The v?Mul function performs element by element multiplication of vector a and vector b.

Special values for Real Function v?Mul(x)
Argument 1	Argument 2	Result	Exception
+0	+0	+0
+0	-0	-0
-0	+0	-0
-0	-0	+0
+0	+∞	QNAN	INVALID
+0	-∞	QNAN	INVALID
-0	+∞	QNAN	INVALID
-0	-∞	QNAN	INVALID
+∞	+0	QNAN	INVALID
+∞	-0	QNAN	INVALID
-∞	+0	QNAN	INVALID
-∞	-0	QNAN	INVALID
+∞	+∞	+∞
+∞	-∞	-∞
-∞	+∞	-∞
-∞	-∞	+∞
SNAN	any value	QNAN	INVALID
any value	SNAN	QNAN	INVALID
QNAN	non-SNAN	QNAN
non-SNAN	QNAN	QNAN

Specifications for special values of the complex functions are defined according to the following formula

Mul(x1+i*y1,x2+i*y2) = (x1*x2-y1*y2) + i*(x1*y2+y1*x2).

Overflow in a complex function occurs (supported in the HA/LA accuracy modes only) when all RE(x), RE(y), IM(x), IM(y) arguments are finite numbers, but the real or imaginary part of the computed result is so large that it does not fit the target precision. In this case, the function returns ∞ in that part of the result, raises the OVERFLOW exception, and sets the VM Error Status to VML_STATUS_OVERFLOW (overriding any possible VML_STATUS_ACCURACYWARNING status).

Parent topic: Arithmetic Functions

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Developer Reference for Intel® oneAPI Math Kernel Library for C

v?Mul