[v3] speed tweak to __int_to_char

[Jerry Quinn]

[message only made it to gcc-patches before]

Relocating the common case of decimal printing first improves the
overall speed on testsuite/performance/ofstream_insert_float.cc by
about 0.1 sec to ~3.8 seconds.

OK for 3.3 and mainline?

Jerry



2003-07-04  Jerry Quinn  <jlquinn@optonline.net>

	* include/bits/locale_facets.tcc (__int_to_char): Move common
        case to the top.


*** locale_facets.tcc.~1.103.~	Tue Jul  1 01:28:56 2003
--- locale_facets.tcc	Thu Jul  3 22:22:20 2003
***************
*** 692,698 ****
        _CharT* __buf = __out + __size - 1;
        _CharT* __bufend = __out + __size;
  
!       if (__builtin_expect(__basefield == ios_base::oct, false))
  	{
  	  // Octal.
  	  do 
--- 714,735 ----
        _CharT* __buf = __out + __size - 1;
        _CharT* __bufend = __out + __size;
  
!       if (__builtin_expect(__basefield != ios_base::oct &&
! 			   __basefield != ios_base::hex, true))
! 	{
! 	  // Decimal.
! 	  do 
! 	    {
! 	      *__buf-- = __lit[(__v % 10) + __num_base::_S_odigits];
! 	      __v /= 10;
! 	    } 
! 	  while (__v != 0);
! 	  if (__neg)
! 	    *__buf-- = __lit[__num_base::_S_ominus];
! 	  else if (__flags & ios_base::showpos)
! 	    *__buf-- = __lit[__num_base::_S_oplus];
! 	}
! 	else if (__basefield == ios_base::oct)
  	{
  	  // Octal.
  	  do 
***************
*** 704,710 ****
  	  if (__showbase)
  	    *__buf-- = __lit[__num_base::_S_odigits];
  	}
!       else if (__builtin_expect(__basefield == ios_base::hex, false))
  	{
  	  // Hex.
  	  const bool __uppercase = __flags & ios_base::uppercase;
--- 741,747 ----
  	  if (__showbase)
  	    *__buf-- = __lit[__num_base::_S_odigits];
  	}
!       else
  	{
  	  // Hex.
  	  const bool __uppercase = __flags & ios_base::uppercase;
***************
*** 724,743 ****
  	      *__buf-- = __lit[__num_base::_S_odigits];
  	    }
  	}
-       else
- 	{
- 	  // Decimal.
- 	  do 
- 	    {
- 	      *__buf-- = __lit[(__v % 10) + __num_base::_S_odigits];
- 	      __v /= 10;
- 	    } 
- 	  while (__v != 0);
- 	  if (__neg)
- 	    *__buf-- = __lit[__num_base::_S_ominus];
- 	  else if (__flags & ios_base::showpos)
- 	    *__buf-- = __lit[__num_base::_S_oplus];
- 	}
        int __ret = __bufend - __buf - 1;
        return __ret;
      }
--- 761,766 ----