[ << ] | [ < ] | [ Up ] | [ > ] | [ >> ] | [Top] | [Contents] | [Index] | [ ? ] |
3.17.12 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’.
[ << ] | [ < ] | [ Up ] | [ > ] | [ >> ] | [Top] | [Contents] | [Index] | [ ? ] |
This document was generated on October 19, 2013 using texi2html 5.0.