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Diffstat (limited to 'gas/doc/internals.texi')
| -rw-r--r-- | gas/doc/internals.texi | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gas/doc/internals.texi b/gas/doc/internals.texi index c63a2db..a97ead3 100644 --- a/gas/doc/internals.texi +++ b/gas/doc/internals.texi @@ -1045,6 +1045,16 @@ pointer, for any expression that can not be recognized. When the function is called, @code{input_line_pointer} will point to the start of the expression. +@item md_register_arithmetic +@cindex md_register_arithmetic +If this macro is defined and evaluates to zero then GAS will not fold +expressions that add or subtract a constant to/from a register to give +another register. For example GAS's default behaviour is to fold the +expression "r8 + 1" into "r9", which is probably not the result +intended by the programmer. The default is to allow such folding, +since this maintains backwards compatibility with earlier releases of +GAS. + @item tc_unrecognized_line @cindex tc_unrecognized_line If you define this macro, GAS will call it when it finds a line that it can not |