Use dynamic branch prediction hint in more cases.

From-SVN: r37105

Use dynamic branch prediction hint in more cases.
From-SVN: r37105
55d8cb78 · Bernd Schmidt · Bernd Schmidt · 005f39ce · 55d8cb78 · 55d8cb78
Commit 55d8cb78 authored Oct 28, 2000 by Bernd Schmidt Committed by Bernd Schmidt Oct 28, 2000
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gcc/ChangeLog
+2 -0

gcc/config/ia64/ia64.c
+2 -2

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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -8,6 +8,8 @@

 	* config/ia64/ia64.h (RTX_COSTS): A few more entries, and a more
 	accurate value for MULT.
+	* config/ia64/ia64.c (ia64_print_operand): Require probability to be
+	2% or > 98% before using static branch prediction bits.

 2000-10-28  Neil Booth  <neilb@earthling.net>


--- a/gcc/config/ia64/ia64.c
+++ b/gcc/config/ia64/ia64.c
@@ -3311,11 +3311,11 @@ ia64_print_operand (file, x, code)
 	    int pred_val = INTVAL (XEXP (x, 0));

 	    /* Guess top and bottom 10% statically predicted.  */
-	    if (pred_val < REG_BR_PROB_BASE / 10)
+	    if (pred_val < REG_BR_PROB_BASE / 50)
 	      which = ".spnt";
 	    else if (pred_val < REG_BR_PROB_BASE / 2)
 	      which = ".dpnt";
-	    else if (pred_val < REG_BR_PROB_BASE * 9 / 10)
+	    else if (pred_val < REG_BR_PROB_BASE / 100 * 98)
 	      which = ".dptk";
 	    else
 	      which = ".sptk";