RE: Quick FUNCTION_MODE doco query

["Dave Korn" <dave dot korn at artimi dot com>]

On 10 March 2007 18:11, Paul Brook wrote:

[ redirected from gcc@ to gcc-patches@ ]

>>  @defmac FUNCTION_MODE
>>  An alias for the machine mode used for memory references to functions
>> being called, in @code{call} RTL expressions.  On most CISC machines,
>> where an instruction can begin at any byte address, this should be
>> @code{QImode}; on RISC machines, where all instructions are word-sized
>> and aligned, this should be a mode with the same size and alignment as
>> the machine instruction words - @code{SImode} for 32-bit processors, or
>> perhaps @code{HImode} for such machines as the ARM cpu in Thumb mode,
>> which uses 16-bit instructions.
>>  @end defmac
> 
> I think the last sentence just adds more confusion than value. Maybe:
> 
> [...]. On most RISC machines, where all instructions have fixed sized and
> alignment, this should be a mode with the same size and alignment as the
> machine instruction words - Typically @code{SImode} or @code{HImode}.
> 
> Paul

  Thanks for the suggestion.  Attached patch updates the FUNCTION_MODE
documentation.


2007-03-10  Dave Korn  <dave.korn@artimi.com>

	* doc/tm.texi (FUNCTION_MODE):  Update and extend documentation.

    cheers,
      DaveK
-- 
Can't think of a witty .sigline today....

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