diff options
Diffstat (limited to 'gas/doc/c-cris.texi')
| -rw-r--r-- | gas/doc/c-cris.texi | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/gas/doc/c-cris.texi b/gas/doc/c-cris.texi index 2551b18..e814767 100644 --- a/gas/doc/c-cris.texi +++ b/gas/doc/c-cris.texi @@ -74,6 +74,25 @@ When @option{-N} is specified, @code{@value{AS}} will emit a warning when a 16-bit branch instruction is expanded into a 32-bit multiple-instruction construct (@pxref{CRIS-Expand}). +@cindex @option{--no-mul-bug-abort} command line option, CRIS +@cindex @option{--mul-bug-abort} command line option, CRIS +@cindex CRIS @option{--no-mul-bug-abort} command line option +@cindex CRIS @option{--mul-bug-abort} command line option + +Some versions of the CRIS v10, for example in the Etrax 100 LX, +contain a bug that causes destabilizing memory accesses when a +multiply instruction is executed with certain values in the +first operand just before a cache-miss. When the +@option{--mul-bug-abort} command line option is active (the +default value), @code{@value{AS}} will refuse to assemble a file +containing a multiply instruction at a dangerous offset, one +that could be the last on a cache-line, or is in a section with +insufficient alignment. This placement checking does not catch +any case where the multiply instruction is dangerously placed +because it is located in a delay-slot. The +@option{--mul-bug-abort} command line option turns off the +checking. + @node CRIS-Expand @section Instruction expansion |