Xtensa port, part 4: documentation changes

[Joseph S. Myers]

On Fri, 30 Nov 2001, Bob Wilson wrote:

> + @emph{Xtensa Options}
> + -mbig-endian -mlittle-endian

This list should be inside @gccoptlist and with lines terminated with
@gol.  This is to support manpage generation.

> + The Xtensa architecture is designed to support many different
> + configurations.  The compiler's default options can be set to match a
> + particular Xtensa configuration by copying a configuration file into the
> + GCC sources when building GCC.  The @samp{-m} options below may be used

"@." for full stops at ends of sentences following a capital letter.

> + @table @code

This should be @table @gcctabopt.

> + @item -mbig-endian
> + @itemx -mlittle-endian

In general, options need indexing with @opindex.

> + Enable or disable use of the optional normalization shift amount
> + (@code{NSA}) instructions to implement the built-in @samp{ffs} function.

@code{ffs}.

> + @item -mfused-madd
> + @itemx -mno-fused-madd
> + Enable or disable use of fused multiply/add and multiply/subtract
> + instructions in the floating-point option.  This has no effect if the

Just a note, we should probably implement the C99 fma functions as
built-in functions (which expand to such an instruction if available,
otherwise just call the external library function).  The default for this
option should depend on the FP_CONTRACT pragma - which however we don't
yet support.

> + The default is @samp{-mserialize-@-volatile}.  Use
> + @samp{-mno-@-serialize-@-volatile} to omit the @code{MEMW} instructions.

The option names in the text should be the same as those in the @item
lines, inside @option (not @samp).  Do you actually need discretionary
hyphens here?

> + Control the treatment of literal pools.  The default is
> + @samp{--no-@-text-@-section-@-literals}, which places literals in a
> + separate section in the output file.  This allows the literal pool to be
> + placed in a data RAM/ROM, and it also allows the linker to combine literal
> + pools from separate object files to remove redundant literals and
> + improve code size.  With @samp{--text-@-section-@-literals}, the

Likewise.

-- 
Joseph S. Myers
jsm28@cam.ac.uk