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Date: Tue, 18 Aug 2009 16:57:43 +0100
From: Nigel Horne <njh@bandsman.co.uk>
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Subject: [Qemu-devel] Arm emulation tweak
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To: qemu-devel@nongnu.org

This small patch reduces (on my machine) the call to new_tmp by 16 
bytes, which may not sound much, but it's called so often that it makes 
a nice speed up of Arm emulation:

*** Otranslate.c    2009-08-18 16:52:42.000000000 +0100
--- translate.c    2009-08-18 16:53:17.000000000 +0100
***************
*** 105,120 ****
  /* Allocate a temporary variable.  */
  static TCGv_i32 new_tmp(void)
  {
-     TCGv tmp;
      if (num_temps == MAX_TEMPS)
          abort();
 
      if (GET_TCGV_I32(temps[num_temps]))
        return temps[num_temps++];
 
!     tmp = tcg_temp_new_i32();
!     temps[num_temps++] = tmp;
!     return tmp;
  }
 
  /* Release a temporary variable.  */
--- 105,117 ----
  /* Allocate a temporary variable.  */
  static TCGv_i32 new_tmp(void)
  {
      if (num_temps == MAX_TEMPS)
          abort();
 
      if (GET_TCGV_I32(temps[num_temps]))
        return temps[num_temps++];
 
!     return temps[num_temps++] = tcg_temp_new_i32();
  }
 
  /* Release a temporary variable.  */

-- 
Nigel Horne. Arranger, Adjudicator, Band Trainer, Composer, Tutor, Typesetter.
NJH Music, ICQ#20252325
njh@bandsman.co.uk http://www.bandsman.co.uk