as: M32R-Opts
9.20.1 M32R Options
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The Renesas M32R version of 'as' has a few machine dependent options:
'-m32rx'
'as' can assemble code for several different members of the Renesas
M32R family. Normally the default is to assemble code for the M32R
microprocessor. This option may be used to change the default to
the M32RX microprocessor, which adds some more instructions to the
basic M32R instruction set, and some additional parameters to some
of the original instructions.
'-m32r2'
This option changes the target processor to the M32R2
microprocessor.
'-m32r'
This option can be used to restore the assembler's default
behaviour of assembling for the M32R microprocessor. This can be
useful if the default has been changed by a previous command-line
option.
'-little'
This option tells the assembler to produce little-endian code and
data. The default is dependent upon how the toolchain was
configured.
'-EL'
This is a synonym for _-little_.
'-big'
This option tells the assembler to produce big-endian code and
data.
'-EB'
This is a synonym for _-big_.
'-KPIC'
This option specifies that the output of the assembler should be
marked as position-independent code (PIC).
'-parallel'
This option tells the assembler to attempts to combine two
sequential instructions into a single, parallel instruction, where
it is legal to do so.
'-no-parallel'
This option disables a previously enabled _-parallel_ option.
'-no-bitinst'
This option disables the support for the extended bit-field
instructions provided by the M32R2. If this support needs to be
re-enabled the _-bitinst_ switch can be used to restore it.
'-O'
This option tells the assembler to attempt to optimize the
instructions that it produces. This includes filling delay slots
and converting sequential instructions into parallel ones. This
option implies _-parallel_.
'-warn-explicit-parallel-conflicts'
Instructs 'as' to produce warning messages when questionable
parallel instructions are encountered. This option is enabled by
default, but 'gcc' disables it when it invokes 'as' directly.
Questionable instructions are those whose behaviour would be
different if they were executed sequentially. For example the code
fragment 'mv r1, r2 || mv r3, r1' produces a different result from
'mv r1, r2 \n mv r3, r1' since the former moves r1 into r3 and then
r2 into r1, whereas the later moves r2 into r1 and r3.
'-Wp'
This is a shorter synonym for the
_-warn-explicit-parallel-conflicts_ option.
'-no-warn-explicit-parallel-conflicts'
Instructs 'as' not to produce warning messages when questionable
parallel instructions are encountered.
'-Wnp'
This is a shorter synonym for the
_-no-warn-explicit-parallel-conflicts_ option.
'-ignore-parallel-conflicts'
This option tells the assembler's to stop checking parallel
instructions for constraint violations. This ability is provided
for hardware vendors testing chip designs and should not be used
under normal circumstances.
'-no-ignore-parallel-conflicts'
This option restores the assembler's default behaviour of checking
parallel instructions to detect constraint violations.
'-Ip'
This is a shorter synonym for the _-ignore-parallel-conflicts_
option.
'-nIp'
This is a shorter synonym for the _-no-ignore-parallel-conflicts_
option.
'-warn-unmatched-high'
This option tells the assembler to produce a warning message if a
'.high' pseudo op is encountered without a matching '.low' pseudo
op. The presence of such an unmatched pseudo op usually indicates
a programming error.
'-no-warn-unmatched-high'
Disables a previously enabled _-warn-unmatched-high_ option.
'-Wuh'
This is a shorter synonym for the _-warn-unmatched-high_ option.
'-Wnuh'
This is a shorter synonym for the _-no-warn-unmatched-high_ option.
Info Catalog
as: M32R-Dependent
as: M32R-Directives