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comparison src/cpu/sparc/vm/vtableStubs_sparc.cpp @ 642:660978a2a31a

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6791178: Specialize for zero as the compressed oop vm heap base Summary: Use zero based compressed oops if java heap is below 32gb and unscaled compressed oops if java heap is below 4gb. Reviewed-by: never, twisti, jcoomes, coleenp
author kvn
date Thu, 12 Mar 2009 10:37:46 -0700
parents 9adddb8c0fc8
children 1d037ecd7960
comparison
equal deleted inserted replaced
641:6af0a709d52b 642:660978a2a31a
219 else { 219 else {
220 const int slop = 2*BytesPerInstWord; // sethi;add (needed for long offsets) 220 const int slop = 2*BytesPerInstWord; // sethi;add (needed for long offsets)
221 if (is_vtable_stub) { 221 if (is_vtable_stub) {
222 // ld;ld;ld,jmp,nop 222 // ld;ld;ld,jmp,nop
223 const int basic = 5*BytesPerInstWord + 223 const int basic = 5*BytesPerInstWord +
224 // shift;add for load_klass 224 // shift;add for load_klass (only shift with zero heap based)
225 (UseCompressedOops ? 2*BytesPerInstWord : 0); 225 (UseCompressedOops ?
226 ((Universe::narrow_oop_base() == NULL) ? BytesPerInstWord : 2*BytesPerInstWord) : 0);
226 return basic + slop; 227 return basic + slop;
227 } else { 228 } else {
228 const int basic = (28 LP64_ONLY(+ 6)) * BytesPerInstWord + 229 const int basic = (28 LP64_ONLY(+ 6)) * BytesPerInstWord +
229 // shift;add for load_klass 230 // shift;add for load_klass (only shift with zero heap based)
230 (UseCompressedOops ? 2*BytesPerInstWord : 0); 231 (UseCompressedOops ?
232 ((Universe::narrow_oop_base() == NULL) ? BytesPerInstWord : 2*BytesPerInstWord) : 0);
231 return (basic + slop); 233 return (basic + slop);
232 } 234 }
233 } 235 }
234 } 236 }
235 237