diff options
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 29 |
1 files changed, 8 insertions, 21 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 0980230..c1e708b 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -915,7 +915,7 @@ Objective-C and Objective-C++ Dialects}. @emph{AVR Options} (@ref{AVR Options}) @gccoptlist{-mmcu=@var{mcu} -mabsdata -maccumulate-args -mcvt -mbranch-cost=@var{cost} -mfuse-add=@var{level} -mfuse-move=@var{level} --mcall-prologues -mgas-isr-prologues -mint8 -mflmap +-mfuse-move2 -mcall-prologues -mgas-isr-prologues -mint8 -mflmap -mdouble=@var{bits} -mlong-double=@var{bits} -mno-call-main -mn_flash=@var{size} -mfract-convert-truncate -mno-interrupts -mmain-is-OS_task -mrelax -mrmw -mstrict-X -mtiny-stack @@ -25110,6 +25110,10 @@ Valid values for @var{level} are in the range @code{0} @dots{} @code{23} which is a 3:2:2:2 mixed radix value. Each digit controls some aspect of the optimization. +@opindex mfuse-move2 +@item -mfuse-move2 +Run a post combine optimization pass that tries to fuse move instructions. + @opindex mstrict-X @item -mstrict-X Use address register @code{X} in a way proposed by the hardware. This means @@ -31370,31 +31374,14 @@ When the RISC-V specifications define an extension as depending on other extensions, GCC will implicitly add the dependent extensions to the enabled extension set if they weren't added explicitly. -@opindex mcpu -@item -mcpu=@var{processor-string} -Use architecture of and optimize the output for the given processor, specified -by particular CPU name. -Permissible values for this option are: @samp{mips-p8700}, @samp{sifive-e20}, -@samp{sifive-e21}, @samp{sifive-e24}, @samp{sifive-e31}, @samp{sifive-e34}, -@samp{sifive-e76}, @samp{sifive-s21}, @samp{sifive-s51}, @samp{sifive-s54}, -@samp{sifive-s76}, @samp{sifive-u54}, @samp{sifive-u74}, @samp{sifive-x280}, -@samp{sifive-xp450}, @samp{sifive-x670}, @samp{thead-c906}, @samp{tt-ascalon-d8}, -@samp{xiangshan-nanhu}, @samp{xiangshan-kunminghu}, @samp{xt-c908}, @samp{xt-c908v}, -@samp{xt-c910}, @samp{xt-c910v2}, @samp{xt-c920}, @samp{xt-c920v2}. +@include riscv-mcpu.texi Note that @option{-mcpu} does not override @option{-march} or @option{-mtune}. -@opindex mtune -@item -mtune=@var{processor-string} -Optimize the output for the given processor, specified by microarchitecture or -particular CPU name. Permissible values for this option are: -@samp{generic-ooo}, @samp{mips-p8700}, @samp{rocket}, @samp{sifive-3-series}, -@samp{sifive-5-series}, @samp{sifive-7-series}, @samp{size}, -@samp{sifive-p400-series}, @samp{sifive-p600-series}, and all valid options for -@option{-mcpu=}. +@include riscv-mtune.texi When @option{-mtune=} is not specified, use the setting from @option{-mcpu}, -the default is @samp{rocket} if both are not specified. +the default is @samp{generic} if both are not specified. The @samp{size} choice is not intended for use by end-users. This is used when @option{-Os} is specified. It overrides the instruction cost info |