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   gcc    ( 1 )

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Параметры подробно (Options detail)

MMIX

These options are defined for the MMIX:

       -mlibfuncs
       -mno-libfuncs
           Specify that intrinsic library functions are being compiled,
           passing all values in registers, no matter the size.

       -mepsilon
       -mno-epsilon
           Generate floating-point comparison instructions that compare
           with respect to the "rE" epsilon register.

       -mabi=mmixware
       -mabi=gnu
           Generate code that passes function parameters and return
           values that (in the called function) are seen as registers $0
           and up, as opposed to the GNU ABI which uses global registers
           $231 and up.

       -mzero-extend
       -mno-zero-extend
           When reading data from memory in sizes shorter than 64 bits,
           use (do not use) zero-extending load instructions by default,
           rather than sign-extending ones.

       -mknuthdiv
       -mno-knuthdiv
           Make the result of a division yielding a remainder have the
           same sign as the divisor.  With the default, -mno-knuthdiv,
           the sign of the remainder follows the sign of the dividend.
           Both methods are arithmetically valid, the latter being
           almost exclusively used.

       -mtoplevel-symbols
       -mno-toplevel-symbols
           Prepend (do not prepend) a : to all global symbols, so the
           assembly code can be used with the "PREFIX" assembly
           directive.

       -melf
           Generate an executable in the ELF format, rather than the
           default mmo format used by the mmix simulator.

       -mbranch-predict
       -mno-branch-predict
           Use (do not use) the probable-branch instructions, when
           static branch prediction indicates a probable branch.

       -mbase-addresses
       -mno-base-addresses
           Generate (do not generate) code that uses base addresses.
           Using a base address automatically generates a request
           (handled by the assembler and the linker) for a constant to
           be set up in a global register.  The register is used for one
           or more base address requests within the range 0 to 255 from
           the value held in the register.  The generally leads to short
           and fast code, but the number of different data items that
           can be addressed is limited.  This means that a program that
           uses lots of static data may require -mno-base-addresses.

       -msingle-exit
       -mno-single-exit
           Force (do not force) generated code to have a single exit
           point in each function.