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4809552: Optimize Arrays.fill(...)

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Reviewed-by: kvn
This commit is contained in:
Tom Rodriguez 2010-08-27 17:33:49 -07:00
parent 519c627fe5
commit 08d9e03b81
17 changed files with 940 additions and 11 deletions
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85
hotspot/src/share/vm/runtime/stubRoutines.cpp
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@ -97,6 +97,15 @@ address StubRoutines::_checkcast_arraycopy = NULL;
address StubRoutines::_unsafe_arraycopy = NULL;
address StubRoutines::_generic_arraycopy = NULL;
address StubRoutines::_jbyte_fill;
address StubRoutines::_jshort_fill;
address StubRoutines::_jint_fill;
address StubRoutines::_arrayof_jbyte_fill;
address StubRoutines::_arrayof_jshort_fill;
address StubRoutines::_arrayof_jint_fill;
double (* StubRoutines::_intrinsic_log )(double) = NULL;
double (* StubRoutines::_intrinsic_log10 )(double) = NULL;
double (* StubRoutines::_intrinsic_exp )(double) = NULL;
@ -195,6 +204,46 @@ void StubRoutines::initialize2() {
#undef TEST_ARRAYCOPY
#define TEST_FILL(type) \
if (_##type##_fill != NULL) { \
union { \
double d; \
type body[96]; \
} s; \
\
int v = 32; \
for (int offset = -2; offset <= 2; offset++) { \
for (int i = 0; i < 96; i++) { \
s.body[i] = 1; \
} \
type* start = s.body + 8 + offset; \
for (int aligned = 0; aligned < 2; aligned++) { \
if (aligned) { \
if (((intptr_t)start) % HeapWordSize == 0) { \
((void (*)(type*, int, int))StubRoutines::_arrayof_##type##_fill)(start, v, 80); \
} else { \
continue; \
} \
} else { \
((void (*)(type*, int, int))StubRoutines::_##type##_fill)(start, v, 80); \
} \
for (int i = 0; i < 96; i++) { \
if (i < (8 + offset) || i >= (88 + offset)) { \
assert(s.body[i] == 1, "what?"); \
} else { \
assert(s.body[i] == 32, "what?"); \
} \
} \
} \
} \
} \
TEST_FILL(jbyte);
TEST_FILL(jshort);
TEST_FILL(jint);
#undef TEST_FILL
#define TEST_COPYRTN(type) \
test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_##type##s_atomic), sizeof(type)); \
test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::arrayof_conjoint_##type##s), (int)MAX2(sizeof(HeapWord), sizeof(type)))
@ -315,3 +364,39 @@ JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, siz
Copy::arrayof_conjoint_oops(src, dest, count);
gen_arraycopy_barrier((oop *) dest, count);
JRT_END
address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) {
#define RETURN_STUB(xxx_fill) { \
name = #xxx_fill; \
return StubRoutines::xxx_fill(); }
switch (t) {
case T_BYTE:
case T_BOOLEAN:
if (!aligned) RETURN_STUB(jbyte_fill);
RETURN_STUB(arrayof_jbyte_fill);
case T_CHAR:
case T_SHORT:
if (!aligned) RETURN_STUB(jshort_fill);
RETURN_STUB(arrayof_jshort_fill);
case T_INT:
case T_FLOAT:
if (!aligned) RETURN_STUB(jint_fill);
RETURN_STUB(arrayof_jint_fill);
case T_DOUBLE:
case T_LONG:
case T_ARRAY:
case T_OBJECT:
case T_NARROWOOP:
case T_ADDRESS:
// Currently unsupported
return NULL;
default:
ShouldNotReachHere();
return NULL;
}
#undef RETURN_STUB
}