ST10F280_12 datasheet(60/239 Pages) STMICROELECTRONICS

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Central Processing Unit (CPU)

ST10F280

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The Table 6 shows the various combinations of pointer post-modification for each of these 2

new addressing modes. In this document the symbols “[Rwn⊗]” and “[IDXi⊗]” refer to these

addressing modes.

CoLOAD

Rwn, Rwm

[IDXi⊗], [Rwm⊗]

Rwn, [Rwm⊗]

CoLOAD-

CoLOAD2

CoLOAD2-

CoCMP

CoSHL

Rwm

#data4

[Rwm⊗]

Yes

CoSHR

CoASHR

CoASHR, rnd

CoABS

Rwn, Rwm

[IDXi⊗], [Rwm⊗]

Rwn, [Rwm⊗]

Table 6.

Pointer post-modification combinations for IDXi and Rwn

Symbol

Mnemonic

Address pointer operation

“[IDXi⊗]” stands for

[IDXi](IDXi) ← (IDXi) (no-op)

[IDXi+](IDXi) ← (IDXi) +2 (i=0,1)

[IDXi](IDXi) ← (IDXi)2 (i=0,1)

[IDXi + QXj](IDXi) ← (IDXi) + (QXj) (i, j =0,1)

[IDXi QXj](IDXi) ← (IDXi) (QXj) (i, j =0,1)

“[Rwn⊗]” stands for

[Rwn]

(Rwn)

← (Rwn) (no-op)

[Rwn

(Rwn)

← (Rwn) +2 (n=0-15)

[Rwn-]

(Rwn)

← (Rwn)2 (k=0-15)

[Rwn

+QRj]

(Rwn)

← (Rwn) + (QRj) (n=0-15;j =0,1)

[Rwn QRj]

(Rwn)

← (Rwn) (QRj) (n=0-15; j =0,1)

Table 7.

MAC registers referenced as ‘CoReg‘

Registers

Description

Address in Opcode

MSW

MAC-Unit Status Word

00000b

MAH

MAC-Unit Accumulator High

00001b

MAS

“limited” MAH /signed

00010b

Table 5.

MAC coprocessor specific instructions (continued)

Mnemonic

Addressing modes

Repeatability

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