1.1 --- a/src/share/vm/runtime/stubRoutines.cpp Sat Apr 02 10:54:15 2011 -0700
1.2 +++ b/src/share/vm/runtime/stubRoutines.cpp Sun Apr 03 12:00:54 2011 +0200
1.3 @@ -433,3 +433,77 @@
1.4
1.5 #undef RETURN_STUB
1.6 }
1.7 +
1.8 +// constants for computing the copy function
1.9 +enum {
1.10 + COPYFUNC_UNALIGNED = 0,
1.11 + COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize
1.12 + COPYFUNC_CONJOINT = 0,
1.13 + COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend
1.14 +};
1.15 +
1.16 +// Note: The condition "disjoint" applies also for overlapping copies
1.17 +// where an descending copy is permitted (i.e., dest_offset <= src_offset).
1.18 +address
1.19 +StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) {
1.20 + int selector =
1.21 + (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) +
1.22 + (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT);
1.23 +
1.24 +#define RETURN_STUB(xxx_arraycopy) { \
1.25 + name = #xxx_arraycopy; \
1.26 + return StubRoutines::xxx_arraycopy(); }
1.27 +
1.28 +#define RETURN_STUB_PARM(xxx_arraycopy, parm) { \
1.29 + name = #xxx_arraycopy; \
1.30 + return StubRoutines::xxx_arraycopy(parm); }
1.31 +
1.32 + switch (t) {
1.33 + case T_BYTE:
1.34 + case T_BOOLEAN:
1.35 + switch (selector) {
1.36 + case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy);
1.37 + case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy);
1.38 + case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy);
1.39 + case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy);
1.40 + }
1.41 + case T_CHAR:
1.42 + case T_SHORT:
1.43 + switch (selector) {
1.44 + case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy);
1.45 + case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy);
1.46 + case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy);
1.47 + case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy);
1.48 + }
1.49 + case T_INT:
1.50 + case T_FLOAT:
1.51 + switch (selector) {
1.52 + case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy);
1.53 + case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy);
1.54 + case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy);
1.55 + case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy);
1.56 + }
1.57 + case T_DOUBLE:
1.58 + case T_LONG:
1.59 + switch (selector) {
1.60 + case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy);
1.61 + case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy);
1.62 + case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy);
1.63 + case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy);
1.64 + }
1.65 + case T_ARRAY:
1.66 + case T_OBJECT:
1.67 + switch (selector) {
1.68 + case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized);
1.69 + case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized);
1.70 + case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized);
1.71 + case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized);
1.72 + }
1.73 + default:
1.74 + ShouldNotReachHere();
1.75 + return NULL;
1.76 + }
1.77 +
1.78 +#undef RETURN_STUB
1.79 +#undef RETURN_STUB_PARM
1.80 +}
