AT75C datasheet(69/171 Pages) ATMEL

Part #	AT75C

Description	Smart Internet Appliance Processor (SIAP)

PDF	171 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

Logo

69 / 171 page

AT75C DSP Subsystem

1368C–INTAP–08/02

MAASU – Multiply Signed by Unsigned and Accumulate

Aligned Previous Product

Syntax:

maasu operand1, operand2, aX

Operation:

aX + aligned and shifted p –> aX

operand1 –> y

operand2 –> x

signed y • unsigned x –> p

Operands:

y, (rN)

y, REG

(rJ), (rI)

(rN), ##long immediate

Affected Flags:

Cycles:

2 when the second operand is ##long immediate

Words:

2 when the second operand is ##long immediate

Notes:

Aligned and shifted p means that the previous product is sign-extended

into 36 bits, then shifted as defined by the PS field of status register st1,

and then aligned with sign-extension, 16 bits to the right.

y –> y means that y retains its value.

The REG cannot be aX, bX, p.

The multiplication in

maasu (rJ), (rI), aX is between X-RAM and Y-RAM

only, where rJ points to Y-RAM and rI points to X-RAM.

NVCE

xxxxxxx

–

AT75C Datasheet(PDF) 69 Page - ATMEL Corporation