Go to the first, previous, next, last section, table of contents.
These `-m' options are defined for the AMD Am29000:
-mdw
- Generate code that assumes the
DW
bit is set, i.e., that byte and
halfword operations are directly supported by the hardware. This is the
default.
-mndw
- Generate code that assumes the
DW
bit is not set.
-mbw
- Generate code that assumes the system supports byte and halfword write
operations. This is the default.
-mnbw
- Generate code that assumes the systems does not support byte and
halfword write operations. `-mnbw' implies `-mndw'.
-msmall
- Use a small memory model that assumes that all function addresses are
either within a single 256 KB segment or at an absolute address of less
than 256k. This allows the
call
instruction to be used instead
of a const
, consth
, calli
sequence.
-mnormal
- Use the normal memory model: Generate
call
instructions only when
calling functions in the same file and calli
instructions
otherwise. This works if each file occupies less than 256 KB but allows
the entire executable to be larger than 256 KB. This is the default.
-mlarge
- Always use
calli
instructions. Specify this option if you expect
a single file to compile into more than 256 KB of code.
-m29050
- Generate code for the Am29050.
-m29000
- Generate code for the Am29000. This is the default.
-mkernel-registers
- Generate references to registers
gr64-gr95
instead of to
registers gr96-gr127
. This option can be used when compiling
kernel code that wants a set of global registers disjoint from that used
by user-mode code.
Note that when this option is used, register names in `-f' flags
must use the normal, user-mode, names.
-muser-registers
- Use the normal set of global registers,
gr96-gr127
. This is the
default.
-mstack-check
-mno-stack-check
- Insert (or do not insert) a call to
__msp_check
after each stack
adjustment. This is often used for kernel code.
-mstorem-bug
-mno-storem-bug
- `-mstorem-bug' handles 29k processors which cannot handle the
separation of a mtsrim insn and a storem instruction (most 29000 chips
to date, but not the 29050).
-mno-reuse-arg-regs
-mreuse-arg-regs
- `-mno-reuse-arg-regs' tells the compiler to only use incoming argument
registers for copying out arguments. This helps detect calling a function
with fewer arguments than it was declared with.
-msoft-float
- Generate output containing library calls for floating point.
Warning: the requisite libraries are not part of GNU CC.
Normally the facilities of the machine's usual C compiler are used, but
this can't be done directly in cross-compilation. You must make your
own arrangements to provide suitable library functions for
cross-compilation.
Go to the first, previous, next, last section, table of contents.