Mercurial > hg > truffle

comparison src/share/vm/utilities/copy.hpp @ 1579:e9ff18c4ace7

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Merge
author jrose
date Wed, 02 Jun 2010 22:45:42 -0700
parents c18cbe5936b8 2d127394260e
children d93949c5bdcc
comparison
equal deleted inserted replaced
1562:dfe27f03244a 1579:e9ff18c4ace7
49 } 49 }
50 50
51 class Copy : AllStatic { 51 class Copy : AllStatic {
52 public: 52 public:
53 // Block copy methods have four attributes. We don't define all possibilities. 53 // Block copy methods have four attributes. We don't define all possibilities.
54 // alignment: aligned according to minimum Java object alignment (MinObjAlignment) 54 // alignment: aligned to BytesPerLong
55 // arrayof: arraycopy operation with both operands aligned on the same 55 // arrayof: arraycopy operation with both operands aligned on the same
56 // boundary as the first element of an array of the copy unit. 56 // boundary as the first element of an array of the copy unit.
57 // This is currently a HeapWord boundary on all platforms, except 57 // This is currently a HeapWord boundary on all platforms, except
58 // for long and double arrays, which are aligned on an 8-byte 58 // for long and double arrays, which are aligned on an 8-byte
59 // boundary on all platforms. 59 // boundary on all platforms.
68 // ('conjoint_' | 'disjoint_') 68 // ('conjoint_' | 'disjoint_')
69 // ('words' | 'bytes' | 'jshorts' | 'jints' | 'jlongs' | 'oops') 69 // ('words' | 'bytes' | 'jshorts' | 'jints' | 'jlongs' | 'oops')
70 // [ '_atomic' ] 70 // [ '_atomic' ]
71 // 71 //
72 // Except in the arrayof case, whatever the alignment is, we assume we can copy 72 // Except in the arrayof case, whatever the alignment is, we assume we can copy
73 // whole alignment units. E.g., if MinObjAlignment is 2x word alignment, an odd 73 // whole alignment units. E.g., if BytesPerLong is 2x word alignment, an odd
74 // count may copy an extra word. In the arrayof case, we are allowed to copy 74 // count may copy an extra word. In the arrayof case, we are allowed to copy
75 // only the number of copy units specified. 75 // only the number of copy units specified.
76 76
77 // HeapWords 77 // HeapWords
78 78
303 basic_fatal("not word aligned"); 303 basic_fatal("not word aligned");
304 #endif 304 #endif
305 } 305 }
306 static void assert_params_aligned(HeapWord* from, HeapWord* to) { 306 static void assert_params_aligned(HeapWord* from, HeapWord* to) {
307 #ifdef ASSERT 307 #ifdef ASSERT
308 if (mask_bits((uintptr_t)from, MinObjAlignmentInBytes-1) != 0) 308 if (mask_bits((uintptr_t)from, BytesPerLong-1) != 0)
309 basic_fatal("not object aligned"); 309 basic_fatal("not long aligned");
310 if (mask_bits((uintptr_t)to, MinObjAlignmentInBytes-1) != 0) 310 if (mask_bits((uintptr_t)to, BytesPerLong-1) != 0)
311 basic_fatal("not object aligned"); 311 basic_fatal("not long aligned");
312 #endif 312 #endif
313 } 313 }
314 314
315 static void assert_params_aligned(HeapWord* to) { 315 static void assert_params_aligned(HeapWord* to) {
316 #ifdef ASSERT 316 #ifdef ASSERT
317 if (mask_bits((uintptr_t)to, MinObjAlignmentInBytes-1) != 0) 317 if (mask_bits((uintptr_t)to, BytesPerLong-1) != 0)
318 basic_fatal("not object aligned"); 318 basic_fatal("not long aligned");
319 #endif 319 #endif
320 } 320 }
321 321
322 static void assert_non_zero(size_t count) { 322 static void assert_non_zero(size_t count) {
323 #ifdef ASSERT 323 #ifdef ASSERT