3.17.38. RX Options
3.17.38 RX Options
These command-line options are defined for RX targets:
-
-m64bit-doubles
-m32bit-doubles
-
Make the
double
data type be 64 bits (-m64bit-doubles
) or 32 bits (-m32bit-doubles
) in size. The default is-m32bit-doubles
. Note RX floating-point hardware only works on 32-bit values, which is why the default is-m32bit-doubles
. -
-fpu
-nofpu
-
Enables (
-fpu
) or disables (-nofpu
) the use of RX floating-point hardware. The default is enabled for the RX600 series and disabled for the RX200 series.Floating-point instructions are only generated for 32-bit floating-point values, however, so the FPU hardware is not used for doubles if the
-m64bit-doubles
option is used.Note If the
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