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3.17.29 MN10300 Options

These -m options are defined for Matsushita MN10300 architectures:

-mmult-bug
Generate code to avoid bugs in the multiply instructions for the MN10300 processors. This is the default.
-mno-mult-bug
Do not generate code to avoid bugs in the multiply instructions for the MN10300 processors.
-mam33
Generate code using features specific to the AM33 processor.
-mno-am33
Do not generate code using features specific to the AM33 processor. This is the default.
-mam33-2
Generate code using features specific to the AM33/2.0 processor.
-mam34
Generate code using features specific to the AM34 processor.
-mtune=cpu-type
Use the timing characteristics of the indicated CPU type when scheduling instructions. This does not change the targeted processor type. The CPU type must be one of `mn10300', `am33', `am33-2' or `am34'.
-mreturn-pointer-on-d0
When generating a function that returns a pointer, return the pointer in both a0 and d0. Otherwise, the pointer is returned only in a0, and attempts to call such functions without a prototype would result in errors. Note that this option is on by default; use -mno-return-pointer-on-d0 to disable it.
-mno-crt0
Do not link in the C run-time initialization object file.
-mrelax
Indicate to the linker that it should perform a relaxation optimization pass to shorten branches, calls and absolute memory addresses. This option only has an effect when used on the command line for the final link step.

This option makes symbolic debugging impossible.

-mliw
Allow the compiler to generate Long Instruction Word instructions if the target is the `AM33' or later. This is the default. This option defines the preprocessor macro `__LIW__'.
-mnoliw
Do not allow the compiler to generate Long Instruction Word instructions. This option defines the preprocessor macro `__NO_LIW__'.
-msetlb
Allow the compiler to generate the SETLB and Lcc instructions if the target is the `AM33' or later. This is the default. This option defines the preprocessor macro `__SETLB__'.
-mnosetlb
Do not allow the compiler to generate SETLB or Lcc instructions. This option defines the preprocessor macro `__NO_SETLB__'.