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   gcc    ( 1 )

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Параметры подробно (Options detail)

C-SKY

GCC supports these options when compiling for C-SKY V2
       processors.

       -march=arch
           Specify the C-SKY target architecture.  Valid values for arch
           are: ck801, ck802, ck803, ck807, and ck810.  The default is
           ck810.

       -mcpu=cpu
           Specify the C-SKY target processor.  Valid values for cpu
           are: ck801, ck801t, ck802, ck802t, ck802j, ck803, ck803h,
           ck803t, ck803ht, ck803f, ck803fh, ck803e, ck803eh, ck803et,
           ck803eht, ck803ef, ck803efh, ck803ft, ck803eft, ck803efht,
           ck803r1, ck803hr1, ck803tr1, ck803htr1, ck803fr1, ck803fhr1,
           ck803er1, ck803ehr1, ck803etr1, ck803ehtr1, ck803efr1,
           ck803efhr1, ck803ftr1, ck803eftr1, ck803efhtr1, ck803s,
           ck803st, ck803se, ck803sf, ck803sef, ck803seft, ck807e,
           ck807ef, ck807, ck807f, ck810e, ck810et, ck810ef, ck810eft,
           ck810, ck810v, ck810f, ck810t, ck810fv, ck810tv, ck810ft, and
           ck810ftv.

       -mbig-endian
       -EB
       -mlittle-endian
       -EL Select big- or little-endian code.  The default is little-
           endian.

       -mhard-float
       -msoft-float
           Select hardware or software floating-point implementations.
           The default is soft float.

       -mdouble-float
       -mno-double-float
           When -mhard-float is in effect, enable generation of double-
           precision float instructions.  This is the default except
           when compiling for CK803.

       -mfdivdu
       -mno-fdivdu
           When -mhard-float is in effect, enable generation of
           "frecipd", "fsqrtd", and "fdivd" instructions.  This is the
           default except when compiling for CK803.

       -mfpu=fpu
           Select the floating-point processor.  This option can only be
           used with -mhard-float.  Values for fpu are fpv2_sf
           (equivalent to -mno-double-float -mno-fdivdu), fpv2
           (-mdouble-float -mno-divdu), and fpv2_divd (-mdouble-float
           -mdivdu).

       -melrw
       -mno-elrw
           Enable the extended "lrw" instruction.  This option defaults
           to on for CK801 and off otherwise.

       -mistack
       -mno-istack
           Enable interrupt stack instructions; the default is off.

           The -mistack option is required to handle the "interrupt" and
           "isr" function attributes.

       -mmp
           Enable multiprocessor instructions; the default is off.

       -mcp
           Enable coprocessor instructions; the default is off.

       -mcache
           Enable coprocessor instructions; the default is off.

       -msecurity
           Enable C-SKY security instructions; the default is off.

       -mtrust
           Enable C-SKY trust instructions; the default is off.

       -mdsp
       -medsp
       -mvdsp
           Enable C-SKY DSP, Enhanced DSP, or Vector DSP instructions,
           respectively.  All of these options default to off.

       -mdiv
       -mno-div
           Generate divide instructions.  Default is off.

       -msmart
       -mno-smart
           Generate code for Smart Mode, using only registers numbered
           0-7 to allow use of 16-bit instructions.  This option is
           ignored for CK801 where this is the required behavior, and it
           defaults to on for CK802.  For other targets, the default is
           off.

       -mhigh-registers
       -mno-high-registers
           Generate code using the high registers numbered 16-31.  This
           option is not supported on CK801, CK802, or CK803, and is
           enabled by default for other processors.

       -manchor
       -mno-anchor
           Generate code using global anchor symbol addresses.

       -mpushpop
       -mno-pushpop
           Generate code using "push" and "pop" instructions.  This
           option defaults to on.

       -mmultiple-stld
       -mstm
       -mno-multiple-stld
       -mno-stm
           Generate code using "stm" and "ldm" instructions.  This
           option isn't supported on CK801 but is enabled by default on
           other processors.

       -mconstpool
       -mno-constpool
           Create constant pools in the compiler instead of deferring it
           to the assembler.  This option is the default and required
           for correct code generation on CK801 and CK802, and is
           optional on other processors.

       -mstack-size
       -mno-stack-size
           Emit ".stack_size" directives for each function in the
           assembly output.  This option defaults to off.

       -mccrt
       -mno-ccrt
           Generate code for the C-SKY compiler runtime instead of
           libgcc.  This option defaults to off.

       -mbranch-cost=n
           Set the branch costs to roughly "n" instructions.  The
           default is 1.

       -msched-prolog
       -mno-sched-prolog
           Permit scheduling of function prologue and epilogue
           sequences.  Using this option can result in code that is not
           compliant with the C-SKY V2 ABI prologue requirements and
           that cannot be debugged or backtraced.  It is disabled by
           default.