Freescale-semiconductor StarCore SC140 Instrukcja Użytkownika Pobierz pdf (Strona 100)

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2-68 SC140 DSP Core Reference Manual

Memory Interface

Table 2-30 shows the representation of the change-of-flow instructions in big and little endian modes. In

this table, it is assumed that the stack access is to address A0. This shows how the contents of the PC and

SR are transferred to/from memory like 32-bit long words.

Table 2-31 shows the representation of the control instructions in big and little endian modes. In this table,

it is assumed that the stack access is to address A0.

Table 2-31. Control Instructions in Big and Little Endian Modes

Table 2-30. Non-Loop Change-of-Flow Instructions in Big and Little Endian Modes

Instruction Register Operands

Big

Endian

Little

Endian

BSR

BSRD

JSR

JSRD

RTE

RTED

A0 = A

A1 = B

A2 = C

A3 = D

A4 = E

A5 = F

A6 = G

A7 = H

A0 = D

A1 = C

A2 = B

A3 = A

A4 = H

A5 = G

A6 = F

A7 = E

RTS

RTSD

RTSTK

RTSTKD

A0 = A

A1 = B

A2 = C

A3 = D

A0 = D

A1 = C

A2 = B

A3 = A

Instruction Register Operands

Big

Endian

Little

Endian

TRAP

ILLEGAL

Interrupt Service

A0 = A

A1 = B

A2 = C

A3 = D

A4 = E

A5 = F

A6 = G

A7 = H

A0 = D

A1 = C

A2 = B

A3 = A

A4 = H

A5 = G

A6 = F

A7 = E

031

PC =

SR =

031

PC =

031

PC =

SR =

1 2 ... 95 96 97 98 99 100 101 102 103 104 105 ... 759 760

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