Motorola 24-Bit Digital Signal Processor, DSP56000 manual Data Arithmetic Logic Unit Motorola

SECTION CONTENTS

SECTION 3.1 DATA ARITHMETIC LOGIC UNIT	3
SECTION 3.2 OVERVIEW AND DATA ALU ARCHITECTURE	3
3.2.1 Data ALU Input Registers (X1, X0, Y1, Y0)	5
3.2.2 MAC and Logic Unit	6
3.2.3 Data ALU A and B Accumulators	7
3.2.4 Accumulator Shifter	9
3.2.5 Data Shifter/Limiter	9
3.2.5.1 Limiting (Saturation Arithmetic)	9
3.2.5.2 Scaling	10
SECTION 3.3 DATA REPRESENTATION AND ROUNDING	10
SECTION 3.4 DOUBLE PRECISION MULTIPLY MODE	16
SECTION 3.5 DATA ALU PROGRAMMING MODEL	19
SECTION 3.6 DATA ALU SUMMARY	19

3 - 2 DATA ARITHMETIC LOGIC UNIT MOTOROLA