Gcc/10.2.0/gcc/FRV-Options
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3.19.17 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
andfcc0
.-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: Submodel Options [Contents][Index]