@findex read_pc
@findex write_pc
@findex read_sp
-@findex write_sp
@findex read_fp
These change the behavior of @code{read_pc}, @code{write_pc},
-@code{read_sp}, @code{write_sp} and @code{read_fp}. For most targets,
-these may be left undefined. @value{GDBN} will call the read and write
-register functions with the relevant @code{_REGNUM} argument.
+@code{read_sp} and @code{read_fp}. For most targets, these may be left
+undefined. @value{GDBN} will call the read and write register functions
+with the relevant @code{_REGNUM} argument.
These macros are useful when a target keeps one of these registers in a
hard to get at place; for example, part in a segment register and part