ComplexOperations

Functions
v2s	__builtin_pulp_cplxmuls (v2s x, v2s y)
	Complex Multiplication, Q15x15 into Q15. More...
v2s	__builtin_pulp_cplxmulsdiv2 (v2s x, v2s y)
	Complex Multiplication, Q15x15 into Q15 followed by a division by 2. More...
v2s	__builtin_pulp_cplxmulsdiv4 (v2s x, v2s y)
	Complex Multiplication, Q15x15 into Q15 followed by a division by 4. More...
v2s	__builtin_pulp_sub2rotmj (v2s x, v2s y)
	Complex substration, result rotated by -pi/2. More...
v2s	__builtin_pulp_cplx_conj (v2s x)
	Complex conjugate. More...

Description

Function Documentation

v2s __builtin_pulp_cplx_conj

(

v2s

x

)

Complex conjugate.

Returns: (v2s) {(x)[0], -(x)[1]}

Available macros:

    gap8_cplxconf(x, x)
    __CPLXCONJ(x, x)

Parameters

x	A complex vector, <I,Q>

Referenced by __CPLXCONJ(), and gap8_cplxconj().

v2s __builtin_pulp_cplxmuls	(	v2s	x,
		v2s	y
	)

Complex Multiplication, Q15x15 into Q15.

Returns: (v2s) {(signed short) ((((int) (x)[0]*(int) (y)[0]) - ((int) (x)[1]*(int) (y)[1]))>>15), (signed short) ((((int) (x)[0]*(int) (y)[1]) + ((int) (x)[1]*(int) (y)[0]))>>15)}

Available macros:

    gap8_cplxmuls(x, x)
    __CPLXMULS(x, x)

Parameters

x	A complex vector, <I,Q>
y	A complex vector, <I,Q>

Referenced by __CPLXMULS(), and gap8_cplxmuls().

v2s __builtin_pulp_cplxmulsdiv2	(	v2s	x,
		v2s	y
	)

Complex Multiplication, Q15x15 into Q15 followed by a division by 2.

Returns: (v2s) {((signed short) ((((int) (x)[0]*(int) (y)[0]) - ((int) (x)[1]*(int) (y)[1]))>>15))>>1, ((signed short) ((((int) (x)[0]*(int) (y)[1]) + ((int) (x)[1]*(int) (y)[0]))>>15))>>1}

Available macros:

    gap8_cplxmulsdiv2(x, x)
    __CPLXMULSDIV2(x, x)

Parameters

x	A complex vector, <I,Q>
y	A complex vector, <I,Q>

Referenced by __CPLXMULSDIV2(), and gap8_cplxmulsdiv2().

v2s __builtin_pulp_cplxmulsdiv4	(	v2s	x,
		v2s	y
	)

Complex Multiplication, Q15x15 into Q15 followed by a division by 4.

Returns: (v2s) {((signed short) ((((int) (x)[0]*(int) (y)[0]) - ((int) (x)[1]*(int) (y)[1]))>>15))>>2, ((signed short) ((((int) (x)[0]*(int) (y)[1]) + ((int) (x)[1]*(int) (y)[0]))>>15))>>2}

Available macros:

    gap8_cplxmulsdiv4(x, x)
    __CPLXMULSDIV4(x, x)

Parameters

x	A complex vector, <I,Q>
y	A complex vector, <I,Q>

Referenced by __CPLXMULSDIV4(), and gap8_cplxmulsdiv4().

v2s __builtin_pulp_sub2rotmj	(	v2s	x,
		v2s	y
	)

Complex substration, result rotated by -pi/2.

Returns: (v2s) {(x)[1]-(y)[1], (y)[0]-(x)[0]}

Available macros:

    gap8_sub2rotmj(x, x)
    __SUB2ROTMJ(x, x)

Parameters

x	A complex vector, <I,Q>
y	A complex vector, <I,Q>

Referenced by __SUB2ROTMJ(), and gap8_sub2rotmj().