3.17.17 SH Options
These -m options are defined for the SH implementations:
- Generate code for the SH1.
- Generate code for the SH2.
- Generate code for the SH2e.
- Generate code for the SH3.
- Generate code for the SH3e.
- Generate code for the SH4 without a floating-point unit.
- Generate code for the SH4 with a floating-point unit that only
supports single-precision arithmetic.
- Generate code for the SH4 assuming the floating-point unit is in
single-precision mode by default.
- Generate code for the SH4.
- Compile code for the processor in big endian mode.
- Compile code for the processor in little endian mode.
- Align doubles at 64-bit boundaries. Note that this changes the calling
conventions, and thus some functions from the standard C library will
not work unless you recompile it first with -mdalign.
- Shorten some address references at link time, when possible; uses the
linker option -relax.
- Use 32-bit offsets in
switch tables. The default is to use
- Enable the use of the instruction
- Comply with the calling conventions defined by Renesas.
- Mark the
MAC register as call-clobbered, even if
-mhitachi is given.
- Increase IEEE-compliance of floating-point code.
- Dump instruction size and location in the assembly code.
- This option is deprecated. It pads structures to multiple of 4 bytes,
which is incompatible with the SH ABI.
- Optimize for space instead of speed. Implied by -Os.
- When generating position-independent code, emit function calls using
the Global Offset Table instead of the Procedure Linkage Table.
- Generate a library function call to invalidate instruction cache
entries, after fixing up a trampoline. This library function call
doesn't assume it can write to the whole memory address space. This
is the default when the target is