Chapter 14. CRIS Dependent Features

95

be a function entry and will be resolved by the run time resolver as with

PLT

. The relocation is

R_CRIS_32_GOTPLT

. Example:

jsr [$r0+fnname:GOTPLT]

GOTPLT16

A variant of

GOTPLT

giving a 16 bit value. Its relocation name is

R_CRIS_16_GOTPLT

. Example:

jsr [$r0+fnname:GOTPLT16]

GOTOFF

This suffix must only be attached to a local symbol, but may be used in an expression adding an

offset. The value is the address of the symbol relative to the start of the global offset table. The

relocation name is

R_CRIS_32_GOTREL

. Example:

move.d [$r0+localsym:GOTOFF],r3

14.3.3. Register names

A

$

character may always prefix a general or special register name in an instruction operand

but is mandatory when the option

 no underscore

is specified or when the

.syntax

register_prefix

directive is in effect. Register names are case insensitive.

14.3.4. Assembler Directives

There are a few CRIS specific pseudo directives in addition to the generic ones. Chapter 8 Assembler

Directives. Constants emitted by pseudo directives are in little endian order for CRIS. There is no

support for floating point specific directives for CRIS.

.dword EXPRESSIONS

The

.dword

directive is a synonym for

.int

, expecting zero or more EXPRESSIONS, separated

by commas. For each expression, a 32 bit little endian constant is emitted.

.syntax ARGUMENT

The

.syntax

directive takes as ARGUMENT one of the following case sensitive choices.

no_register_prefix

The

.syntax no_register_prefix

directive makes a

$

character prefix on all registers

optional. It overrides a previous setting, including the corresponding effect of the option

 no underscore

. If this directive is used when ordinary symbols do not have a

_

character

prefix, care must be taken to avoid ambiguities whether an operand is a register or a symbol;

using symbols with names the same as general or special registers then invoke undefined

behavior.

register_prefix

This directive makes a

$

character prefix on all registers mandatory. It overrides a previous

setting, including the corresponding effect of the option

 underscore

.

leading_underscore

This is an assertion directive, emitting an error if the

 no underscore

option is in effect.

no_leading_underscore

This is the opposite of the

.syntax leading_underscore

directive and emits an error

if the option

 underscore

is in effect.