Arm VERSION 1.2 Manual do Utilizador descarregar pdf (Página 347)

100

101

Directives Reference

7.7.16 NOFP

The

NOFP

directive disallows floating-point instructions in an assembly language source

file.

Syntax

NOFP

Usage

Use

NOFP

to ensure that no floating-point instructions are used in situations where there

is no support for floating-point instructions either in software or in target hardware.

If a floating-point instruction occurs after the

NOFP

directive, an

Unknown opcode

error is

generated and the assembly fails.

If a

NOFP

directive occurs after a floating-point instruction, the assembler generates the

error:

Too late to ban floating point instructions

and the assembly fails.

7.7.17 REQUIRE

The

REQUIRE

directive specifies a dependency between sections.

Syntax

REQUIRE label

where:

label

is the name of the required label.

Usage

Use

REQUIRE

to ensure that a related section is included, even if it is not directly called.

If the section containing the

REQUIRE

directive is included in a link, the linker also

includes the section containing the definition of the specified label.

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