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3.19.16 FRV Options

--mgpr-32 -

Only use the first 32 general-purpose registers.

--mgpr-64 -

Use all 64 general-purpose registers.

--mfpr-32 -

Use only the first 32 floating-point registers.

--mfpr-64 -

Use all 64 floating-point registers.

--mhard-float -

Use hardware instructions for floating-point operations.

--msoft-float -

Use library routines for floating-point operations.

--malloc-cc -

Dynamically allocate condition code registers.

--mfixed-cc -

Do not try to dynamically allocate condition code registers, only use icc0 and fcc0.

--mdword -

Change ABI to use double word insns.

- -mno-dword -

Do not use double word instructions.

--mdouble -

Use floating-point double instructions.

--mno-double -

Do not use floating-point double instructions.

--mmedia -

Use media instructions.

--mno-media -

Do not use media instructions.

--mmuladd -

Use multiply and add/subtract instructions.

--mno-muladd -

Do not use multiply and add/subtract instructions.

--mfdpic -

Select the FDPIC ABI, which uses function descriptors to represent pointers to functions. Without any PIC/PIE-related options, it implies -fPIE. With -fpic or -fpie, it assumes GOT entries and small data are within a 12-bit range from the GOT base address; with -fPIC or -fPIE, GOT offsets are computed with 32 bits. With a ‘bfin-elf’ target, this option implies -msim.

--minline-plt -

Enable inlining of PLT entries in function calls to functions that are not known to bind locally. It has no effect without -mfdpic. It’s enabled by default if optimizing for speed and compiling for shared libraries (i.e., -fPIC or -fpic), or when an optimization option such as -O3 or above is present in the command line.

--mTLS -

Assume a large TLS segment when generating thread-local code.

--mtls -

Do not assume a large TLS segment when generating thread-local code.

--mgprel-ro -

Enable the use of GPREL relocations in the FDPIC ABI for data that is known to be in read-only sections. It’s enabled by default, except for -fpic or -fpie: even though it may help make the global offset table smaller, it trades 1 instruction for 4. With -fPIC or -fPIE, it trades 3 instructions for 4, one of which may be shared by multiple symbols, and it avoids the need for a GOT entry for the referenced symbol, so it’s more likely to be a win. If it is not, -mno-gprel-ro can be used to disable it.

--multilib-library-pic -

Link with the (library, not FD) pic libraries. It’s implied by -mlibrary-pic, as well as by -fPIC and -fpic without -mfdpic. You should never have to use it explicitly.

--mlinked-fp -

Follow the EABI requirement of always creating a frame pointer whenever a stack frame is allocated. This option is enabled by default and can be disabled with -mno-linked-fp.

--mlong-calls -

Use indirect addressing to call functions outside the current compilation unit. This allows the functions to be placed anywhere within the 32-bit address space.

--malign-labels -

Try to align labels to an 8-byte boundary by inserting NOPs into the previous packet. This option only has an effect when VLIW packing is enabled. It doesn’t create new packets; it merely adds NOPs to existing ones.

--mlibrary-pic -

Generate position-independent EABI code.

--macc-4 -

Use only the first four media accumulator registers.

--macc-8 -

Use all eight media accumulator registers.

--mpack -

Pack VLIW instructions.

--mno-pack -

Do not pack VLIW instructions.

--mno-eflags -

Do not mark ABI switches in e_flags.

--mcond-move -

Enable the use of conditional-move instructions (default).

This switch is mainly for debugging the compiler and will likely be removed in a future version.

--mno-cond-move -

Disable the use of conditional-move instructions.

This switch is mainly for debugging the compiler and will likely be removed in a future version.

--mscc -

Enable the use of conditional set instructions (default).

This switch is mainly for debugging the compiler and will likely be removed in a future version.

--mno-scc -

Disable the use of conditional set instructions.

This switch is mainly for debugging the compiler and will likely be removed in a future version.

--mcond-exec -

Enable the use of conditional execution (default).

This switch is mainly for debugging the compiler and will likely be removed in a future version.

--mno-cond-exec -

Disable the use of conditional execution.

This switch is mainly for debugging the compiler and will likely be removed in a future version.

--mvliw-branch -

Run a pass to pack branches into VLIW instructions (default).

This switch is mainly for debugging the compiler and will likely be removed in a future version.

--mno-vliw-branch -

Do not run a pass to pack branches into VLIW instructions.

This switch is mainly for debugging the compiler and will likely be removed in a future version.

--mmulti-cond-exec -

Enable optimization of && and || in conditional execution (default).

This switch is mainly for debugging the compiler and will likely be removed in a future version.

--mno-multi-cond-exec -

Disable optimization of && and || in conditional execution.

This switch is mainly for debugging the compiler and will likely be removed in a future version.

--mnested-cond-exec -

Enable nested conditional execution optimizations (default).

This switch is mainly for debugging the compiler and will likely be removed in a future version.

--mno-nested-cond-exec -

Disable nested conditional execution optimizations.

This switch is mainly for debugging the compiler and will likely be removed in a future version.

--moptimize-membar -

This switch removes redundant membar instructions from the compiler-generated code. It is enabled by default.

- -mno-optimize-membar -

This switch disables the automatic removal of redundant membar instructions from the generated code.

--mtomcat-stats -

Cause gas to print out tomcat statistics.

--mcpu=cpu -

Select the processor type for which to generate code. Possible values are ‘frv’, ‘fr550’, ‘tomcat’, ‘fr500’, ‘fr450’, ‘fr405’, ‘fr400’, ‘fr300’ and ‘simple’.

Next: GNU/Linux Options, Previous: FT32 Options, Up: Machine-Dependent Options [Contents][Index]

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- © Free Software Foundation
Licensed under the GNU Free Documentation License, Version 1.3.
- https://gcc.gnu.org/onlinedocs/gcc-13.1.0/gcc/FRV-Options.html -

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