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author | Jim Wilson <jimw@sifive.com> | 2017-11-30 18:03:46 +0000 |
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committer | Jim Wilson <wilson@gcc.gnu.org> | 2017-11-30 10:03:46 -0800 |
commit | fb0e72c8c06acbc30759e707d807c35758c6961c (patch) | |
tree | 40dec4c6b8f7d59e2b2a7aa14561a3c9d9ddf771 /gcc | |
parent | 2d11897a77255a521a6c420739266d3bec0c76fe (diff) | |
download | gcc-fb0e72c8c06acbc30759e707d807c35758c6961c.zip gcc-fb0e72c8c06acbc30759e707d807c35758c6961c.tar.gz gcc-fb0e72c8c06acbc30759e707d807c35758c6961c.tar.bz2 |
Cleanup riscv option docs.
gcc/
* doc/invoke.texi (RISC-V Options): Delete nonexistent -mmemcpy and
-mno-memcpy options. For -mplt, -mfdiv, -mdiv, -msave-restore, and
-mstrict-align, add info on default value. Delete redundant lines for
-mabi. Add missing -mexplicit-relocs docs.
From-SVN: r255280
Diffstat (limited to 'gcc')
-rw-r--r-- | gcc/ChangeLog | 7 | ||||
-rw-r--r-- | gcc/doc/invoke.texi | 34 |
2 files changed, 27 insertions, 14 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index aee1325..400ce97 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2017-11-30 Jim Wilson <jimw@sifive.com> + + * doc/invoke.texi (RISC-V Options): Delete nonexistent -mmemcpy and + -mno-memcpy options. For -mplt, -mfdiv, -mdiv, -msave-restore, and + -mstrict-align, add info on default value. Delete redundant lines for + -mabi. Add missing -mexplicit-relocs docs. + 2017-11-30 Claudiu Zissulescu <claziss@synopsys.com> * config/arc/arc.md (trap): New pattern. diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 2de3db1..c105800 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -979,7 +979,6 @@ See RS/6000 and PowerPC Options. @emph{RISC-V Options} @gccoptlist{-mbranch-cost=@var{N-instruction} @gol --mmemcpy -mno-memcpy @gol -mplt -mno-plt @gol -mabi=@var{ABI-string} @gol -mfdiv -mno-fdiv @gol @@ -21757,20 +21756,14 @@ These command-line options are defined for RISC-V targets: @opindex mbranch-cost Set the cost of branches to roughly @var{n} instructions. -@item -mmemcpy -@itemx -mno-memcpy -@opindex mmemcpy -Don't optimize block moves. - @item -mplt @itemx -mno-plt @opindex plt -When generating PIC code, allow the use of PLTs. Ignored for non-PIC. +When generating PIC code, do or don't allow the use of PLTs. Ignored for +non-PIC. The default is @option{-mplt}. @item -mabi=@var{ABI-string} @opindex mabi -@item -mabi=@var{ABI-string} -@opindex mabi Specify integer and floating-point calling convention. @var{ABI-string} contains two parts: the size of integer types and the registers used for floating-point types. For example @samp{-march=rv64ifd -mabi=lp64d} means that @@ -21793,13 +21786,16 @@ registers are only 32 bits wide. @item -mfdiv @itemx -mno-fdiv @opindex mfdiv -Use hardware floating-point divide and square root instructions. This requires -the F or D extensions for floating-point registers. +Do or don't use hardware floating-point divide and square root instructions. +This requires the F or D extensions for floating-point registers. The default +is to use them if the specified architecture has these instructions. @item -mdiv @itemx -mno-div @opindex mdiv -Use hardware instructions for integer division. This requires the M extension. +Do or don't use hardware instructions for integer division. This requires the +M extension. The default is to use them if the specified architecture has +these instructions. @item -march=@var{ISA-string} @opindex march @@ -21819,12 +21815,16 @@ Put global and static data smaller than @var{n} bytes into a special section @item -msave-restore @itemx -mno-save-restore @opindex msave-restore -Use smaller but slower prologue and epilogue code. +Do or don't use smaller but slower prologue and epilogue code that uses +library function calls. The default is to use fast inline prologues and +epilogues. @item -mstrict-align @itemx -mno-strict-align @opindex mstrict-align -Do not generate unaligned memory accesses. +Do not or do generate unaligned memory accesses. The default is set depending +on whether the processor we are optimizing for supports fast unaligned access +or not. @item -mcmodel=medlow @opindex mcmodel=medlow @@ -21839,6 +21839,12 @@ Generate code for the medium-any code model. The program and its statically defined symbols must be within any single 2 GiB address range. Programs can be statically or dynamically linked. +@item -mexplicit-relocs +@itemx -mno-exlicit-relocs +Use or do not use assembler relocation operators when dealing with symbolic +addresses. The alternative is to use assembler macros instead, which may +limit optimization. + @end table @node RL78 Options |