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comparison src/cpu/sparc/vm/vm_version_sparc.cpp @ 1365:6476042f815c

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6940701: Don't align loops in stubs for Niagara sparc Summary: Don't align loops in stubs for Niagara sparc since NOPs are expensive. Reviewed-by: twisti, never
author kvn
date Wed, 07 Apr 2010 09:37:47 -0700
parents f6da6f0174ac
children 9e321dcfa5b7
comparison
equal deleted inserted replaced
1364:0dc88ad3244e 1365:6476042f815c
84 // Single-issue, so entry and loop tops are 84 // Single-issue, so entry and loop tops are
85 // aligned on a single instruction boundary 85 // aligned on a single instruction boundary
86 if (FLAG_IS_DEFAULT(InteriorEntryAlignment)) { 86 if (FLAG_IS_DEFAULT(InteriorEntryAlignment)) {
87 FLAG_SET_DEFAULT(InteriorEntryAlignment, 4); 87 FLAG_SET_DEFAULT(InteriorEntryAlignment, 4);
88 } 88 }
89 if (FLAG_IS_DEFAULT(OptoLoopAlignment)) {
90 FLAG_SET_DEFAULT(OptoLoopAlignment, 4);
91 }
92 if (is_niagara1_plus() && FLAG_IS_DEFAULT(AllocatePrefetchDistance)) { 89 if (is_niagara1_plus() && FLAG_IS_DEFAULT(AllocatePrefetchDistance)) {
93 // Use smaller prefetch distance on N2 90 // Use smaller prefetch distance on N2
94 FLAG_SET_DEFAULT(AllocatePrefetchDistance, 256); 91 FLAG_SET_DEFAULT(AllocatePrefetchDistance, 256);
95 } 92 }
96 #endif 93 #endif
94 if (FLAG_IS_DEFAULT(OptoLoopAlignment)) {
95 FLAG_SET_DEFAULT(OptoLoopAlignment, 4);
96 }
97 } 97 }
98 98
99 // Use hardware population count instruction if available. 99 // Use hardware population count instruction if available.
100 if (has_hardware_popc()) { 100 if (has_hardware_popc()) {
101 if (FLAG_IS_DEFAULT(UsePopCountInstruction)) { 101 if (FLAG_IS_DEFAULT(UsePopCountInstruction)) {