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comparison src/share/vm/runtime/stubRoutines.cpp @ 2446:13bc79b5c9c8

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7033154: Improve C1 arraycopy performance Summary: better static analysis. Take advantage of array copy stubs. Reviewed-by: never
author roland
date Sun, 03 Apr 2011 12:00:54 +0200
parents 0ac769a57c64
children 38fa55e5e792
comparison
equal deleted inserted replaced
2445:08eb13460b3a 2446:13bc79b5c9c8
431 return NULL; 431 return NULL;
432 } 432 }
433 433
434 #undef RETURN_STUB 434 #undef RETURN_STUB
435 } 435 }
436
437 // constants for computing the copy function
438 enum {
439 COPYFUNC_UNALIGNED = 0,
440 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize
441 COPYFUNC_CONJOINT = 0,
442 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend
443 };
444
445 // Note: The condition "disjoint" applies also for overlapping copies
446 // where an descending copy is permitted (i.e., dest_offset <= src_offset).
447 address
448 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) {
449 int selector =
450 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) +
451 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT);
452
453 #define RETURN_STUB(xxx_arraycopy) { \
454 name = #xxx_arraycopy; \
455 return StubRoutines::xxx_arraycopy(); }
456
457 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \
458 name = #xxx_arraycopy; \
459 return StubRoutines::xxx_arraycopy(parm); }
460
461 switch (t) {
462 case T_BYTE:
463 case T_BOOLEAN:
464 switch (selector) {
465 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy);
466 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy);
467 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy);
468 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy);
469 }
470 case T_CHAR:
471 case T_SHORT:
472 switch (selector) {
473 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy);
474 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy);
475 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy);
476 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy);
477 }
478 case T_INT:
479 case T_FLOAT:
480 switch (selector) {
481 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy);
482 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy);
483 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy);
484 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy);
485 }
486 case T_DOUBLE:
487 case T_LONG:
488 switch (selector) {
489 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy);
490 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy);
491 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy);
492 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy);
493 }
494 case T_ARRAY:
495 case T_OBJECT:
496 switch (selector) {
497 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized);
498 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized);
499 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized);
500 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized);
501 }
502 default:
503 ShouldNotReachHere();
504 return NULL;
505 }
506
507 #undef RETURN_STUB
508 #undef RETURN_STUB_PARM
509 }