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Chapter 25. M32R Dependent Features

 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 encoun 

tered. This option is enabled by default, but

gcc

disables it when it invokes

as

directly. Question 

able instructions are those whoes 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 en 

countered.

 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 contraint 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 encoun 

tered without a mathcing

.low

pseudo op. The presence of such an unmatches pseudo op usually

indicates a programming error.

 no warn unmatched high

Disables a previously enabled  warn unmatched high option.