X buffer conjugation

Overview

16 bit complex by 32 bit complex using X buffer conjugation

Functions
v8cacc48	mac4_sym_uct_cn (v8cacc48 acc, v32cint16 xbuff, int xstart, unsigned int xoffsets, int ystart, int uct_shift, v4cint32 zbuff, int zstart, unsigned int zoffsets)
	Complex symetric multiply-accumulate intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x input buffer .
v8cacc48	mac4_sym_uct_cn (v8cacc48 acc, v16cint16 xbuff, int xstart, unsigned int xoffsets, int ystart, int uct_shift, v4cint32 zbuff, int zstart, unsigned int zoffsets)
	Complex symetric multiply-accumulate intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x input buffer using small X input buffer.
v8cacc48	mac4_sym_uct_cn (v8cacc48 acc, v16cint16 xbuff, int xstart, unsigned int xoffsets, v16cint16 ybuff, int ystart, int uct_shift, v4cint32 zbuff, int zstart, unsigned int zoffsets)
	Complex symetric multiply-accumulate intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x and y input buffers using small X input buffer.
v8cacc48	msc4_sym_uct_cn (v8cacc48 acc, v32cint16 xbuff, int xstart, unsigned int xoffsets, int ystart, int uct_shift, v4cint32 zbuff, int zstart, unsigned int zoffsets)
	Complex symetric multiply-subtract intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x input buffer .
v8cacc48	msc4_sym_uct_cn (v8cacc48 acc, v16cint16 xbuff, int xstart, unsigned int xoffsets, int ystart, int uct_shift, v4cint32 zbuff, int zstart, unsigned int zoffsets)
	Complex symetric multiply-subtract intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x input buffer using small X input buffer.
v8cacc48	msc4_sym_uct_cn (v8cacc48 acc, v16cint16 xbuff, int xstart, unsigned int xoffsets, v16cint16 ybuff, int ystart, int uct_shift, v4cint32 zbuff, int zstart, unsigned int zoffsets)
	Complex symetric multiply-subtract intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x and y input buffers using small X input buffer.
v8cacc48	mul4_sym_uct_cn (v32cint16 xbuff, int xstart, unsigned int xoffsets, int ystart, int uct_shift, v4cint32 zbuff, int zstart, unsigned int zoffsets)
	Complex symetric multiply intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x input buffer .
v8cacc48	mul4_sym_uct_cn (v16cint16 xbuff, int xstart, unsigned int xoffsets, int ystart, int uct_shift, v4cint32 zbuff, int zstart, unsigned int zoffsets)
	Complex symetric multiply intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x input buffer using small X input buffer.
v8cacc48	mul4_sym_uct_cn (v16cint16 xbuff, int xstart, unsigned int xoffsets, v16cint16 ybuff, int ystart, int uct_shift, v4cint32 zbuff, int zstart, unsigned int zoffsets)
	Complex symetric multiply intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x and y input buffers using small X input buffer.
v8cacc48	negmul4_sym_uct_cn (v32cint16 xbuff, int xstart, unsigned int xoffsets, int ystart, int uct_shift, v4cint32 zbuff, int zstart, unsigned int zoffsets)
	Complex symetric multiply-negate intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x input buffer .
v8cacc48	negmul4_sym_uct_cn (v16cint16 xbuff, int xstart, unsigned int xoffsets, int ystart, int uct_shift, v4cint32 zbuff, int zstart, unsigned int zoffsets)
	Complex symetric multiply-negate intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x input buffer using small X input buffer.
v8cacc48	negmul4_sym_uct_cn (v16cint16 xbuff, int xstart, unsigned int xoffsets, v16cint16 ybuff, int ystart, int uct_shift, v4cint32 zbuff, int zstart, unsigned int zoffsets)
	Complex symetric multiply-negate intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x and y input buffers using small X input buffer.

Function Documentation

v8cacc48 mac4_sym_uct_cn	(	v8cacc48	acc,
		v32cint16	xbuff,
		int	xstart,
		unsigned int	xoffsets,
		int	ystart,
		int	uct_shift,
		v4cint32	zbuff,
		int	zstart,
		unsigned int	zoffsets
	)

Complex symetric multiply-accumulate intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x input buffer .

acc0 += z00*(cnj(x00) + cnj(y00))
acc1 += z10*(cnj(x10) + cnj(y10))
acc2 += z20*(cnj(x20) + cnj(y20))
acc3 += z30*(cnj(x30) + cnj(y30))
acc4 = y00 << uct_shift
acc5 = y10 << uct_shift
acc6 = y20 << uct_shift
acc7 = y30 << uct_shift

Parameters

Input/Output	Type	Comments
return	v8cacc48	Returned accumulation vector (8 x cint48 lanes)
acc	v8cacc48	Incoming accumulation vector (8 x cint48 lanes)
xbuff	v32cint16	Input buffer of 32 elements of type cint16
xstart	int	Starting position offset applied to all lanes of input from X buffer.
xoffsets	unsigned int	4b offset for each lane, applied to both x and y buffers. LSB apply to first lane
ystart	int	Starting position offset applied to all lanes for input from Y buffer.
uct_shift	int	Upshift value to the four upshifted lanes
zbuff	v4cint32	Input buffer of 4 elements of type cint32
zstart	int	Starting position offset applied to all lanes for input from Z buffer. This must be a compile time constant. Only the 4 LSB of the argument are used.
zoffsets	unsigned int	4b offset for each lane, applied to input from Z buffer. LSB apply to first lane

Note

• For more information on how data selection works from the buffers go here. The data buffer and coefficient buffer in this intrinsic use the general scheme.
• Parameter 'zstart' must be a compile time constant.

v8cacc48 mac4_sym_uct_cn	(	v8cacc48	acc,
		v16cint16	xbuff,
		int	xstart,
		unsigned int	xoffsets,
		int	ystart,
		int	uct_shift,
		v4cint32	zbuff,
		int	zstart,
		unsigned int	zoffsets
	)

Complex symetric multiply-accumulate intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x input buffer using small X input buffer.

acc0 += z00*(cnj(x00) + cnj(y00))
acc1 += z10*(cnj(x10) + cnj(y10))
acc2 += z20*(cnj(x20) + cnj(y20))
acc3 += z30*(cnj(x30) + cnj(y30))
acc4 = y00 << uct_shift
acc5 = y10 << uct_shift
acc6 = y20 << uct_shift
acc7 = y30 << uct_shift

Parameters

Input/Output	Type	Comments
return	v8cacc48	Returned accumulation vector (8 x cint48 lanes)
acc	v8cacc48	Incoming accumulation vector (8 x cint48 lanes)
xbuff	v16cint16	Input buffer of 16 elements of type cint16
xstart	int	Starting position offset applied to all lanes of input from X buffer.
xoffsets	unsigned int	4b offset for each lane, applied to both x and y buffers. LSB apply to first lane
ystart	int	Starting position offset applied to all lanes for input from Y buffer.
uct_shift	int	Upshift value to the four upshifted lanes
zbuff	v4cint32	Input buffer of 4 elements of type cint32
zstart	int	Starting position offset applied to all lanes for input from Z buffer. This must be a compile time constant. Only the 4 LSB of the argument are used.
zoffsets	unsigned int	4b offset for each lane, applied to input from Z buffer. LSB apply to first lane

Note

• For more information on how data selection works from the buffers go here. The data buffer and coefficient buffer in this intrinsic use the general scheme.
• Parameter 'zstart' must be a compile time constant.

v8cacc48 mac4_sym_uct_cn	(	v8cacc48	acc,
		v16cint16	xbuff,
		int	xstart,
		unsigned int	xoffsets,
		v16cint16	ybuff,
		int	ystart,
		int	uct_shift,
		v4cint32	zbuff,
		int	zstart,
		unsigned int	zoffsets
	)

Complex symetric multiply-accumulate intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x and y input buffers using small X input buffer.

acc0 += z00*(cnj(x00) + cnj(y00))
acc1 += z10*(cnj(x10) + cnj(y10))
acc2 += z20*(cnj(x20) + cnj(y20))
acc3 += z30*(cnj(x30) + cnj(y30))
acc4 = y00 << uct_shift
acc5 = y10 << uct_shift
acc6 = y20 << uct_shift
acc7 = y30 << uct_shift

Parameters

Input/Output	Type	Comments
return	v8cacc48	Returned accumulation vector (8 x cint48 lanes)
acc	v8cacc48	Incoming accumulation vector (8 x cint48 lanes)
xbuff	v16cint16	Input buffer of 16 elements of type cint16
xstart	int	Starting position offset applied to all lanes of input from X buffer.
xoffsets	unsigned int	4b offset for each lane, applied to both x and y buffers. LSB apply to first lane
ybuff	v16cint16	Right input buffer of 16 elements of type cint16
ystart	int	Starting position offset applied to all lanes for input from Y buffer.
uct_shift	int	Upshift value to the four upshifted lanes
zbuff	v4cint32	Input buffer of 4 elements of type cint32
zstart	int	Starting position offset applied to all lanes for input from Z buffer. This must be a compile time constant. Only the 4 LSB of the argument are used.
zoffsets	unsigned int	4b offset for each lane, applied to input from Z buffer. LSB apply to first lane

Note

• For more information on how data selection works from the buffers go here. The data buffer and coefficient buffer in this intrinsic use the general scheme.
• Parameter 'zstart' must be a compile time constant.

v8cacc48 msc4_sym_uct_cn	(	v8cacc48	acc,
		v32cint16	xbuff,
		int	xstart,
		unsigned int	xoffsets,
		int	ystart,
		int	uct_shift,
		v4cint32	zbuff,
		int	zstart,
		unsigned int	zoffsets
	)

Complex symetric multiply-subtract intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x input buffer .

acc0 -= z00*(cnj(x00) + cnj(y00))
acc1 -= z10*(cnj(x10) + cnj(y10))
acc2 -= z20*(cnj(x20) + cnj(y20))
acc3 -= z30*(cnj(x30) + cnj(y30))
acc4 = y00 << uct_shift
acc5 = y10 << uct_shift
acc6 = y20 << uct_shift
acc7 = y30 << uct_shift

Parameters

Input/Output	Type	Comments
return	v8cacc48	Returned accumulation vector (8 x cint48 lanes)
acc	v8cacc48	Incoming accumulation vector (8 x cint48 lanes)
xbuff	v32cint16	Input buffer of 32 elements of type cint16
xstart	int	Starting position offset applied to all lanes of input from X buffer.
xoffsets	unsigned int	4b offset for each lane, applied to both x and y buffers. LSB apply to first lane
ystart	int	Starting position offset applied to all lanes for input from Y buffer.
uct_shift	int	Upshift value to the four upshifted lanes
zbuff	v4cint32	Input buffer of 4 elements of type cint32
zstart	int	Starting position offset applied to all lanes for input from Z buffer. This must be a compile time constant. Only the 4 LSB of the argument are used.
zoffsets	unsigned int	4b offset for each lane, applied to input from Z buffer. LSB apply to first lane

Note

• For more information on how data selection works from the buffers go here. The data buffer and coefficient buffer in this intrinsic use the general scheme.
• Parameter 'zstart' must be a compile time constant.

v8cacc48 msc4_sym_uct_cn	(	v8cacc48	acc,
		v16cint16	xbuff,
		int	xstart,
		unsigned int	xoffsets,
		int	ystart,
		int	uct_shift,
		v4cint32	zbuff,
		int	zstart,
		unsigned int	zoffsets
	)

Complex symetric multiply-subtract intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x input buffer using small X input buffer.

acc0 -= z00*(cnj(x00) + cnj(y00))
acc1 -= z10*(cnj(x10) + cnj(y10))
acc2 -= z20*(cnj(x20) + cnj(y20))
acc3 -= z30*(cnj(x30) + cnj(y30))
acc4 = y00 << uct_shift
acc5 = y10 << uct_shift
acc6 = y20 << uct_shift
acc7 = y30 << uct_shift

Parameters

Input/Output	Type	Comments
return	v8cacc48	Returned accumulation vector (8 x cint48 lanes)
acc	v8cacc48	Incoming accumulation vector (8 x cint48 lanes)
xbuff	v16cint16	Input buffer of 16 elements of type cint16
xstart	int	Starting position offset applied to all lanes of input from X buffer.
xoffsets	unsigned int	4b offset for each lane, applied to both x and y buffers. LSB apply to first lane
ystart	int	Starting position offset applied to all lanes for input from Y buffer.
uct_shift	int	Upshift value to the four upshifted lanes
zbuff	v4cint32	Input buffer of 4 elements of type cint32
zstart	int	Starting position offset applied to all lanes for input from Z buffer. This must be a compile time constant. Only the 4 LSB of the argument are used.
zoffsets	unsigned int	4b offset for each lane, applied to input from Z buffer. LSB apply to first lane

Note

• For more information on how data selection works from the buffers go here. The data buffer and coefficient buffer in this intrinsic use the general scheme.
• Parameter 'zstart' must be a compile time constant.

v8cacc48 msc4_sym_uct_cn	(	v8cacc48	acc,
		v16cint16	xbuff,
		int	xstart,
		unsigned int	xoffsets,
		v16cint16	ybuff,
		int	ystart,
		int	uct_shift,
		v4cint32	zbuff,
		int	zstart,
		unsigned int	zoffsets
	)

Complex symetric multiply-subtract intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x and y input buffers using small X input buffer.

acc0 -= z00*(cnj(x00) + cnj(y00))
acc1 -= z10*(cnj(x10) + cnj(y10))
acc2 -= z20*(cnj(x20) + cnj(y20))
acc3 -= z30*(cnj(x30) + cnj(y30))
acc4 = y00 << uct_shift
acc5 = y10 << uct_shift
acc6 = y20 << uct_shift
acc7 = y30 << uct_shift

Parameters

Input/Output	Type	Comments
return	v8cacc48	Returned accumulation vector (8 x cint48 lanes)
acc	v8cacc48	Incoming accumulation vector (8 x cint48 lanes)
xbuff	v16cint16	Input buffer of 16 elements of type cint16
xstart	int	Starting position offset applied to all lanes of input from X buffer.
xoffsets	unsigned int	4b offset for each lane, applied to both x and y buffers. LSB apply to first lane
ybuff	v16cint16	Right input buffer of 16 elements of type cint16
ystart	int	Starting position offset applied to all lanes for input from Y buffer.
uct_shift	int	Upshift value to the four upshifted lanes
zbuff	v4cint32	Input buffer of 4 elements of type cint32
zstart	int	Starting position offset applied to all lanes for input from Z buffer. This must be a compile time constant. Only the 4 LSB of the argument are used.
zoffsets	unsigned int	4b offset for each lane, applied to input from Z buffer. LSB apply to first lane

Note

• For more information on how data selection works from the buffers go here. The data buffer and coefficient buffer in this intrinsic use the general scheme.
• Parameter 'zstart' must be a compile time constant.

v8cacc48 mul4_sym_uct_cn	(	v32cint16	xbuff,
		int	xstart,
		unsigned int	xoffsets,
		int	ystart,
		int	uct_shift,
		v4cint32	zbuff,
		int	zstart,
		unsigned int	zoffsets
	)

Complex symetric multiply intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x input buffer .

acc0 = z00*(cnj(x00) + cnj(y00))
acc1 = z10*(cnj(x10) + cnj(y10))
acc2 = z20*(cnj(x20) + cnj(y20))
acc3 = z30*(cnj(x30) + cnj(y30))
acc4 = y00 << uct_shift
acc5 = y10 << uct_shift
acc6 = y20 << uct_shift
acc7 = y30 << uct_shift

Parameters

Input/Output	Type	Comments
return	v8cacc48	Returned accumulation vector (8 x cint48 lanes)
xbuff	v32cint16	Input buffer of 32 elements of type cint16
xstart	int	Starting position offset applied to all lanes of input from X buffer.
xoffsets	unsigned int	4b offset for each lane, applied to both x and y buffers. LSB apply to first lane
ystart	int	Starting position offset applied to all lanes for input from Y buffer.
uct_shift	int	Upshift value to the four upshifted lanes
zbuff	v4cint32	Input buffer of 4 elements of type cint32
zstart	int	Starting position offset applied to all lanes for input from Z buffer. This must be a compile time constant. Only the 4 LSB of the argument are used.
zoffsets	unsigned int	4b offset for each lane, applied to input from Z buffer. LSB apply to first lane

Note

• For more information on how data selection works from the buffers go here. The data buffer and coefficient buffer in this intrinsic use the general scheme.
• Parameter 'zstart' must be a compile time constant.

v8cacc48 mul4_sym_uct_cn	(	v16cint16	xbuff,
		int	xstart,
		unsigned int	xoffsets,
		int	ystart,
		int	uct_shift,
		v4cint32	zbuff,
		int	zstart,
		unsigned int	zoffsets
	)

Complex symetric multiply intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x input buffer using small X input buffer.

acc0 = z00*(cnj(x00) + cnj(y00))
acc1 = z10*(cnj(x10) + cnj(y10))
acc2 = z20*(cnj(x20) + cnj(y20))
acc3 = z30*(cnj(x30) + cnj(y30))
acc4 = y00 << uct_shift
acc5 = y10 << uct_shift
acc6 = y20 << uct_shift
acc7 = y30 << uct_shift

Parameters

Input/Output	Type	Comments
return	v8cacc48	Returned accumulation vector (8 x cint48 lanes)
xbuff	v16cint16	Input buffer of 16 elements of type cint16
xstart	int	Starting position offset applied to all lanes of input from X buffer.
xoffsets	unsigned int	4b offset for each lane, applied to both x and y buffers. LSB apply to first lane
ystart	int	Starting position offset applied to all lanes for input from Y buffer.
uct_shift	int	Upshift value to the four upshifted lanes
zbuff	v4cint32	Input buffer of 4 elements of type cint32
zstart	int	Starting position offset applied to all lanes for input from Z buffer. This must be a compile time constant. Only the 4 LSB of the argument are used.
zoffsets	unsigned int	4b offset for each lane, applied to input from Z buffer. LSB apply to first lane

Note

• For more information on how data selection works from the buffers go here. The data buffer and coefficient buffer in this intrinsic use the general scheme.
• Parameter 'zstart' must be a compile time constant.

v8cacc48 mul4_sym_uct_cn	(	v16cint16	xbuff,
		int	xstart,
		unsigned int	xoffsets,
		v16cint16	ybuff,
		int	ystart,
		int	uct_shift,
		v4cint32	zbuff,
		int	zstart,
		unsigned int	zoffsets
	)

Complex symetric multiply intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x and y input buffers using small X input buffer.

acc0 = z00*(cnj(x00) + cnj(y00))
acc1 = z10*(cnj(x10) + cnj(y10))
acc2 = z20*(cnj(x20) + cnj(y20))
acc3 = z30*(cnj(x30) + cnj(y30))
acc4 = y00 << uct_shift
acc5 = y10 << uct_shift
acc6 = y20 << uct_shift
acc7 = y30 << uct_shift

Parameters

Input/Output	Type	Comments
return	v8cacc48	Returned accumulation vector (8 x cint48 lanes)
xbuff	v16cint16	Input buffer of 16 elements of type cint16
xstart	int	Starting position offset applied to all lanes of input from X buffer.
xoffsets	unsigned int	4b offset for each lane, applied to both x and y buffers. LSB apply to first lane
ybuff	v16cint16	Right input buffer of 16 elements of type cint16
ystart	int	Starting position offset applied to all lanes for input from Y buffer.
uct_shift	int	Upshift value to the four upshifted lanes
zbuff	v4cint32	Input buffer of 4 elements of type cint32
zstart	int	Starting position offset applied to all lanes for input from Z buffer. This must be a compile time constant. Only the 4 LSB of the argument are used.
zoffsets	unsigned int	4b offset for each lane, applied to input from Z buffer. LSB apply to first lane

Note

• For more information on how data selection works from the buffers go here. The data buffer and coefficient buffer in this intrinsic use the general scheme.
• Parameter 'zstart' must be a compile time constant.

v8cacc48 negmul4_sym_uct_cn	(	v32cint16	xbuff,
		int	xstart,
		unsigned int	xoffsets,
		int	ystart,
		int	uct_shift,
		v4cint32	zbuff,
		int	zstart,
		unsigned int	zoffsets
	)

Complex symetric multiply-negate intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x input buffer .

acc0 = -( z00*(cnj(x00) + cnj(y00)) )
acc1 = -( z10*(cnj(x10) + cnj(y10)) )
acc2 = -( z20*(cnj(x20) + cnj(y20)) )
acc3 = -( z30*(cnj(x30) + cnj(y30)) )
acc4 = y00 << uct_shift )
acc5 = y10 << uct_shift )
acc6 = y20 << uct_shift )
acc7 = y30 << uct_shift )

Parameters

Input/Output	Type	Comments
return	v8cacc48	Returned accumulation vector (8 x cint48 lanes)
xbuff	v32cint16	Input buffer of 32 elements of type cint16
xstart	int	Starting position offset applied to all lanes of input from X buffer.
xoffsets	unsigned int	4b offset for each lane, applied to both x and y buffers. LSB apply to first lane
ystart	int	Starting position offset applied to all lanes for input from Y buffer.
uct_shift	int	Upshift value to the four upshifted lanes
zbuff	v4cint32	Input buffer of 4 elements of type cint32
zstart	int	Starting position offset applied to all lanes for input from Z buffer. This must be a compile time constant. Only the 4 LSB of the argument are used.
zoffsets	unsigned int	4b offset for each lane, applied to input from Z buffer. LSB apply to first lane

Note

• For more information on how data selection works from the buffers go here. The data buffer and coefficient buffer in this intrinsic use the general scheme.
• Parameter 'zstart' must be a compile time constant.

v8cacc48 negmul4_sym_uct_cn	(	v16cint16	xbuff,
		int	xstart,
		unsigned int	xoffsets,
		int	ystart,
		int	uct_shift,
		v4cint32	zbuff,
		int	zstart,
		unsigned int	zoffsets
	)

Complex symetric multiply-negate intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x input buffer using small X input buffer.

acc0 = -( z00*(cnj(x00) + cnj(y00)) )
acc1 = -( z10*(cnj(x10) + cnj(y10)) )
acc2 = -( z20*(cnj(x20) + cnj(y20)) )
acc3 = -( z30*(cnj(x30) + cnj(y30)) )
acc4 = y00 << uct_shift )
acc5 = y10 << uct_shift )
acc6 = y20 << uct_shift )
acc7 = y30 << uct_shift )

Parameters

Input/Output	Type	Comments
return	v8cacc48	Returned accumulation vector (8 x cint48 lanes)
xbuff	v16cint16	Input buffer of 16 elements of type cint16
xstart	int	Starting position offset applied to all lanes of input from X buffer.
xoffsets	unsigned int	4b offset for each lane, applied to both x and y buffers. LSB apply to first lane
ystart	int	Starting position offset applied to all lanes for input from Y buffer.
uct_shift	int	Upshift value to the four upshifted lanes
zbuff	v4cint32	Input buffer of 4 elements of type cint32
zstart	int	Starting position offset applied to all lanes for input from Z buffer. This must be a compile time constant. Only the 4 LSB of the argument are used.
zoffsets	unsigned int	4b offset for each lane, applied to input from Z buffer. LSB apply to first lane

Note

• For more information on how data selection works from the buffers go here. The data buffer and coefficient buffer in this intrinsic use the general scheme.
• Parameter 'zstart' must be a compile time constant.

v8cacc48 negmul4_sym_uct_cn	(	v16cint16	xbuff,
		int	xstart,
		unsigned int	xoffsets,
		v16cint16	ybuff,
		int	ystart,
		int	uct_shift,
		v4cint32	zbuff,
		int	zstart,
		unsigned int	zoffsets
	)

Complex symetric multiply-negate intrinsic function with unit center-tap optimization with x buffer conjugation with pre-add from x and y input buffers using small X input buffer.

acc0 = -( z00*(cnj(x00) + cnj(y00)) )
acc1 = -( z10*(cnj(x10) + cnj(y10)) )
acc2 = -( z20*(cnj(x20) + cnj(y20)) )
acc3 = -( z30*(cnj(x30) + cnj(y30)) )
acc4 = y00 << uct_shift )
acc5 = y10 << uct_shift )
acc6 = y20 << uct_shift )
acc7 = y30 << uct_shift )

Parameters

Input/Output	Type	Comments
return	v8cacc48	Returned accumulation vector (8 x cint48 lanes)
xbuff	v16cint16	Input buffer of 16 elements of type cint16
xstart	int	Starting position offset applied to all lanes of input from X buffer.
xoffsets	unsigned int	4b offset for each lane, applied to both x and y buffers. LSB apply to first lane
ybuff	v16cint16	Right input buffer of 16 elements of type cint16
ystart	int	Starting position offset applied to all lanes for input from Y buffer.
uct_shift	int	Upshift value to the four upshifted lanes
zbuff	v4cint32	Input buffer of 4 elements of type cint32
zstart	int	Starting position offset applied to all lanes for input from Z buffer. This must be a compile time constant. Only the 4 LSB of the argument are used.
zoffsets	unsigned int	4b offset for each lane, applied to input from Z buffer. LSB apply to first lane

Note

• For more information on how data selection works from the buffers go here. The data buffer and coefficient buffer in this intrinsic use the general scheme.
• Parameter 'zstart' must be a compile time constant.