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comparison 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
comparison
equal deleted inserted replaced
1913:3b2dea75431e 1914:ae065c367d93
1839 return false; 1839 return false;
1840 } 1840 }
1841 1841
1842 bool Matcher::is_spillable_arg( int reg ) { 1842 bool Matcher::is_spillable_arg( int reg ) {
1843 return can_be_java_arg(reg); 1843 return can_be_java_arg(reg);
1844 }
1845
1846 bool Matcher::use_asm_for_ldiv_by_con( jlong divisor ) {
1847 // Use hardware SDIVX instruction when it is
1848 // faster than a code which use multiply.
1849 return VM_Version::has_fast_idiv();
1844 } 1850 }
1845 1851
1846 // Register for DIVI projection of divmodI 1852 // Register for DIVI projection of divmodI
1847 RegMask Matcher::divI_proj_mask() { 1853 RegMask Matcher::divI_proj_mask() {
1848 ShouldNotReachHere(); 1854 ShouldNotReachHere();