Freescale-semiconductor StarCore SC140 Manual do Utilizador descarregar pdf (Página 317)

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DSP Core Instruction Set

SC140 DSP Core Reference Manual A-3

Table A-2 describes the operators and operations syntax for each instruction.

Table A-3 describes the abbreviations used for the core registers.

Table A-2. Operations Syntax

Operator Description

+Add

– Subtract

* Multiply

/ Divide

| | Absolute value

& Logical AND

| Logical OR

⊕

Exclusive OR

~ Bitwise complement

= = Test for equality, 1 if equal, 0 if not equal

→

Transfer left to right

↔

Indicates either right or left transfers, but not both at once

>> Arithmetic right shift (sign bits shifted right)

<< Arithmetic or logical left shift (functionally the same)

>>> Logical right shift

> Compare for greater than

Rnd( ) Rounding function

x:y Concatenation of x and y

Table A-3. Register Abbreviations

Abbreviation Register Name

D0-D15 General purpose data register

R0-R15 General purpose address register

EMR Exception and mode register

VBA Vector base address register

SP Stack pointer registers: normal (NSP) and exception (ESP)

PC Program counter

SR Status register

MCTL Modifier control register

SA0-SA3 Start address registers

LC0-LC3 Loop counter registers

B0-B7 Modulo base registers

N0-N3 Offset registers

M0-M3 Modulo registers

OSP Other stack pointer

1 2 ... 312 313 314 315 316 317 318 319 320 321 322 ... 759 760

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