mul

Multiplies x and y using matrix math. The inner dimension x-columns and y-rows must be equal.

ret mul(x, y)

Parameters

Item	Description
x	[in] The x input value. If x is a vector, it treated as a row vector.
y	[in] The y input value. If y is a vector, it treated as a column vector.

Return Value

The result of x times y. The result has the dimension x-rows x y-columns.

Type Description

There are 9 overloaded versions of this function; the overloaded versions handle the different cases for the types and sizes of the input arguments.

Version	Name	Purpose	Template Type	Component Type	Size
1
	x	in	scalar	float, int	1
	y	in	scalar	same as input x	1
	ret	out	scalar	same as input x	1
2
	x	in	scalar	float, int	1
	y	in	vector	float, int	any
	ret	out	vector	float, int	same dimension(s) as input y
3
	x	in	scalar	float, int	1
	y	in	matrix	float, int	any
	ret	out	matrix	same as input y	same dimension(s) as input y
4
	x	in	vector	float, int	any
	y	in	scalar	float, int	1
	ret	out	vector	float, int	same dimension(s) as input x
5
	x	in	vector	float, int	any
	y	in	vector	float, int	same dimension(s) as input x
	ret	out	scalar	float, int	1
6
	x	in	vector	float, int	any
	y	in	matrix	float, int	rows = same dimension(s) as input x, columns = any
	ret	out	vector	float, int	same dimension(s) as input y columns
7
	x	in	matrix	float, int	any
	y	in	scalar	float, int	1
	ret	out	matrix	float, int	same dimension(s) as input x
8
	x	in	matrix	float, int	any
	y	in	vector	float, int	number of columns in input x
	ret	out	vector	float, int	number of rows in input x
9
	x	in	matrix	float, int	any
	y	in	matrix	float, int	rows = number of columns in input x
	ret	out	matrix	float, int	rows = number of rows in input x, columns = number of columns in input y

Minimum Shader Model

This function is supported in the following shader models.

Shader Model	Supported
Shader Model 1 (DirectX HLSL) and higher shader models	yes

See also

Intrinsic Functions (DirectX HLSL)