D950CORE View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

D950CORE

16-Bit Fixed Point Digital Signal Processor (DSP) Core

STMicroelectronics 

D950-Core

Three-word Operand (oper_3)

ADD

Addition

ADDCAddition with Carry

ADDS Addition with Shift

AND

Logical AND

CMP

Compare

CMPS Compare Sign

OR

Logical OR

SUB

Subtraction

SUBC Subtraction with Carry

SUBR Reversed Subtraction

SUBRC Reversed Subtraction with Carry

SUBRS Reversed Subtraction with Shift

SUBS Subtraction with Shift

XOR

Exclusive OR

Figure 5.7 ALU Three-Word Operand (oper_3)

*AXm + IXs = ApH

*AYn + IYr = ApH

Ai = Lj oper_3 Ai

,

(CCR)* P

Ai = Rk oper_3 Ai

,

(CCR)* P

Ai = Lj oper_3 Rk

(CCR)* P

,

Ai = Aj oper_3 Ak

(CCR)*

Ai = Lj oper_3 Rk

(CCR)* Rj

Ak

Aj

P

Lp = *AXm + IXs

Rq = *AYn + IYr

A1=L1 oper_3 R1

(CCR)*

,

Li = *AX1 + IX3

*AY1 + IY3 = A1H

,

A1 = L1 oper_3 R1

(CCR)*

A1

,

Li = *AX1 + IX3

*AX1 + IX3 = A1H

A1 = L1 oper_3 R1

,

(CCR)* A1

,

P

Ri = *AY1 + IY3

(CCR)* is used in place of Ai or A1 when instruction=CMP or CMPS

,

Rj = *AY1 + IY3

VR02018F

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