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These are the `-m' options defined for the 32000 series. The default values for these options depends on which style of 32000 was selected when the compiler was configured; the defaults for the most common choices are given below.
-m32032
-m32032
-m32332
-m32332
-m32532
-m32532
-m32081
-m32381
-mmulti-add
polyF
and dotF
. This option is only available if the -m32381
option is in effect. Using these instructions requires changes to
register allocation which generally has a negative impact on
performance. This option should only be enabled when compiling code
particularly likely to make heavy use of multiply-add instructions.
-mnomulti-add
polyF
and dotF
. This is the default on all platforms.
-msoft-float
-mieee-compare
-mno-ieee-compare
-mnobitfield
-mbitfield
-mrtd
ret
instruction.
This calling convention is incompatible with the one normally used on Unix, so you cannot use it if you need to call libraries compiled with the Unix compiler.
Also, you must provide function prototypes for all functions that
take variable numbers of arguments (including printf
);
otherwise incorrect code will be generated for calls to those
functions.
In addition, seriously incorrect code will result if you call a function with too many arguments. (Normally, extra arguments are harmlessly ignored.)
This option takes its name from the 680x0 rtd
instruction.
-mregparam
This calling convention is incompatible with the one normally
used on Unix, so you cannot use it if you need to call libraries
compiled with the Unix compiler.
-mnoregparam
-msb
-mnosb
-mhimem
-mnohimem