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diff src/cpu/sparc/vm/sparc.ad @ 1914:ae065c367d93

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6987135: Performance regression on Intel platform with 32-bits edition between 6u13 and 6u14. Summary: Use hardware DIV instruction for long division by constant when it is faster than code with multiply. Reviewed-by: never
author kvn
date Tue, 02 Nov 2010 09:00:37 -0700
parents 3e8fbc61cee8
children 885e464e1a40
line wrap: on
line diff
--- a/src/cpu/sparc/vm/sparc.ad	Sat Oct 30 13:08:23 2010 -0700
+++ b/src/cpu/sparc/vm/sparc.ad	Tue Nov 02 09:00:37 2010 -0700
@@ -1843,6 +1843,12 @@
   return can_be_java_arg(reg);
 }
 
+bool Matcher::use_asm_for_ldiv_by_con( jlong divisor ) {
+  // Use hardware SDIVX instruction when it is
+  // faster than a code which use multiply.
+  return VM_Version::has_fast_idiv();
+}
+
 // Register for DIVI projection of divmodI
 RegMask Matcher::divI_proj_mask() {
   ShouldNotReachHere();