diff options
Diffstat (limited to 'ld/ld.texinfo')
| -rw-r--r-- | ld/ld.texinfo | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/ld/ld.texinfo b/ld/ld.texinfo index 1f8e34db94..7fae2c242e 100644 --- a/ld/ld.texinfo +++ b/ld/ld.texinfo @@ -6078,7 +6078,7 @@ respectively. @cindex synthesizing on H8/300 @item synthesizing instructions -@c FIXME: specifically mov.b, or any mov instructions really? +@c FIXME: specifically mov.b, or any mov instructions really? -> mov.b only, at least on H8, H8H, H8S @command{ld} finds all @code{mov.b} instructions which use the sixteen-bit absolute address form, but refer to the top page of memory, and changes them to use the eight-bit address form. @@ -6086,6 +6086,14 @@ page of memory, and changes them to use the eight-bit address form. @samp{mov.b @code{@@}@var{aa}:8} whenever the address @var{aa} is in the top page of memory). +@command{ld} finds all @code{mov} instructions which use the register +indirect with 32-bit displacement addressing mode, but use a small +displacement inside 16-bit displacement range, and changes them to use +the 16-bit displacement form. (That is: the linker turns @samp{mov.b +@code{@@}@var{d}:32,ERx} into @samp{mov.b @code{@@}@var{d}:16,ERx} +whenever the displacement @var{d} is in the 16 bit signed integer +range. Only implemented in ELF-format ld). + @item bit manipulation instructions @command{ld} finds all bit manipulation instructions like @code{band, bclr, biand, bild, bior, bist, bixor, bld, bnot, bor, bset, bst, btst, bxor} |