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| author | Kyrylo Tkachov <kyrylo.tkachov@arm.com> | 2014-10-10 12:28:45 +0000 |
|---|---|---|
| committer | Kyrylo Tkachov <ktkachov@gcc.gnu.org> | 2014-10-10 12:28:45 +0000 |
| commit | 75cf149453542f0107a957624b27e8c3cce106fa (patch) | |
| tree | ffcfff25f5f96b8c613f337c9da709e167e9e127 /gcc/doc | |
| parent | b9696ffb6e8e8fbb59b0cc925e218e92c2d71be0 (diff) | |
| download | gcc-75cf149453542f0107a957624b27e8c3cce106fa.zip gcc-75cf149453542f0107a957624b27e8c3cce106fa.tar.gz gcc-75cf149453542f0107a957624b27e8c3cce106fa.tar.bz2 | |
[AArch64] Implement workaround for ARM Cortex-A53 erratum 835769
* config/aarch64/aarch64.h (FINAL_PRESCAN_INSN): Define.
(ADJUST_INSN_LENGTH): Define.
* config/aarch64/aarch64.opt (mfix-cortex-a53-835769): New option.
* config/aarch64/aarch64.c (is_mem_p): New function.
(is_memory_op): Likewise.
(aarch64_prev_real_insn): Likewise.
(is_madd_op): Likewise.
(dep_between_memop_and_curr): Likewise.
(aarch64_madd_needs_nop): Likewise.
(aarch64_final_prescan_insn): Likewise.
* doc/invoke.texi (AArch64 Options): Document -mfix-cortex-a53-835769
and -mno-fix-cortex-a53-835769 options.
From-SVN: r216075
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 8f3eb16..f1ba77b 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -489,6 +489,7 @@ Objective-C and Objective-C++ Dialects}. -mstrict-align @gol -momit-leaf-frame-pointer -mno-omit-leaf-frame-pointer @gol -mtls-dialect=desc -mtls-dialect=traditional @gol +-mfix-cortex-a53-835769 -mno-fix-cortex-a53-835769 @gol -march=@var{name} -mcpu=@var{name} -mtune=@var{name}} @emph{Adapteva Epiphany Options} @@ -11757,6 +11758,14 @@ of TLS variables. This is the default. Use traditional TLS as the thread-local storage mechanism for dynamic accesses of TLS variables. +@item -mfix-cortex-a53-835769 +@itemx -mno-fix-cortex-a53-835769 +@opindex -mfix-cortex-a53-835769 +@opindex -mno-fix-cortex-a53-835769 +Enable or disable the workaround for the ARM Cortex-A53 erratum number 835769. +This will involve inserting a NOP instruction between memory instructions and +64-bit integer multiply-accumulate instructions. + @item -march=@var{name} @opindex march Specify the name of the target architecture, optionally suffixed by one or |