CL-PS7500FE 데이터 시트보기 (PDF) - Cirrus Logic

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CL-PS7500FE

System-on-a Chip for Internet Appliance

Cirrus Logic 

CL-PS7500FE

System-on-a-Chip for Internet Appliance

19.2.2 Monadic Operations

<ABS|URD|NRM|MVF|MNF|SQT|RND>{cond}<S|D|E>{P|M|Z} Fd, Fn, <Fm|#value>

19.2.3 Library Calls

It is recommended that the following floating-point operators are implemented with calls to an appropriate

library (for example, the C library):

q Power

q Reverse power

q Polar angle

q Logarithm base 10

q Logarithm base 0

q Exponent

q Sine

q Cosine

q Tangent

q Arc sine

q Arc cosine

q Arc tangent

19.2.4 Backwards Compatibility

For backwards compatibility with existing floating-point code, the following floating-point mnemonics are

defined in the ARM floating-point instruction set. These opcodes are treated by the FPA as undefined

instructions, and must be handled by support code, less efficient than using library calls.

<POW|RPW|POL>

<LOG|LGN|EXP|SIN|COS|TAN|ASN|ACS|ATN>

abcdj

00000

00010

00100

00110

01000

01010

01100

01110

10000

10010

Mnemonic

ADF

MUF

SUF

RSF

DVF

RDF

POW

RPW

RMF

FML

Description

Add

Multiply

Subtract

Reverse Subtract

Divide

Reverse Divide

Power

Reverse Power

Remainder

Fast Multiply

Operation

Fd := Fn + Fm

Fd := Fn × Fm

Fd := Fn − Fm

Fd := Fm − Fn

Fd := Fn ÷ Fm

Fd := Fm ÷ Fn

Fd := Fn raised to the power of Fm

Fd := Fm raised to the power of Fn

Fd := IEEE remainder of Fn / Fm

Fd := Fn × Fm

Note

1

1

June 1997

ADVANCE DATA BOOK v2.0

FLOATING-POINT INSTRUCTION SET

175

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