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Chapter 25. M32R Dependent Features

.m32r

The directive performs a similar thing as the  m32r command line option. It tells the assembler

to only accept M32R instructions from now on. An instructions from later M32R architectures

are refused.

.m32rx

The directive performs a similar thing as the  m32rx command line option. It tells the assembler

to start accepting the extra instructions in the M32RX ISA as well as the ordinary M32R ISA.

.m32r2

The directive performs a similar thing as the  m32r2 command line option. It tells the assembler

to start accepting the extra instructions in the M32R2 ISA as well as the ordinary M32R ISA.

.little

The directive performs a similar thing as the  little command line option. It tells the assembler

to start producing little endian code and data. This option should be used with care as producing

mixed endian binary files is frought with danger.

.big

The directive performs a similar thing as the  big command line option. It tells the assembler

to start producing big endian code and data. This option should be used with care as producing

mixed endian binary files is frought with danger.

25.3. M32R Warnings

There are several warning and error messages that can be produced by

as

which are specific to the

M32R:

output of 1st instruction is the same as an input to 2nd instruction   is

this intentional ?

This message is only produced if warnings for explicit parallel conflicts have been enabled.

It indicates that the assembler has encountered a parallel instruction in which the destination

register of the left hand instruction is used as an input register in the right hand instruction. For

example in this code fragment

mv r1, r2 || neg r3, r1

register r1 is the destination of the

move instruction and the input to the neg instruction.

output of 2nd instruction is the same as an input to 1st instruction   is

this intentional ?

This message is only produced if warnings for explicit parallel conflicts have been enabled.

It indicates that the assembler has encountered a parallel instruction in which the destination

register of the right hand instruction is used as an input register in the left hand instruction. For

example in this code fragment

mv r1, r2 || neg r2, r3

register r2 is the destination of the

neg instruction and the input to the move instruction.

instruction ... is for the M32RX only

This message is produced when the assembler encounters an instruction which is only supported

by the M32Rx processor, and the

 m32rx

command line flag has not been specified to allow

assembly of such instructions.