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6812678: macro assembler needs delayed binding of a few constants (for 6655638)

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Minor assembler enhancements preparing for method handles

Reviewed-by: kvn
This commit is contained in:
John R Rose 2009-03-04 09:58:39 -08:00
parent 3e2ae68252
commit 07321dec65
17 changed files with 467 additions and 83 deletions
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41
hotspot/src/cpu/sparc/vm/assembler_sparc.cpp
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@ -2615,6 +2615,29 @@ void MacroAssembler::cas_under_lock(Register top_ptr_reg, Register top_reg, Regi
}
}
RegisterConstant MacroAssembler::delayed_value(intptr_t* delayed_value_addr,
Register tmp,
int offset) {
intptr_t value = *delayed_value_addr;
if (value != 0)
return RegisterConstant(value + offset);
// load indirectly to solve generation ordering problem
Address a(tmp, (address) delayed_value_addr);
load_ptr_contents(a, tmp);
#ifdef ASSERT
tst(tmp);
breakpoint_trap(zero, xcc);
#endif
if (offset != 0)
add(tmp, offset, tmp);
return RegisterConstant(tmp);
}
void MacroAssembler::biased_locking_enter(Register obj_reg, Register mark_reg,
Register temp_reg,
Label& done, Label* slow_case,
@ -4057,6 +4080,24 @@ void MacroAssembler::card_write_barrier_post(Register store_addr, Register new_v
card_table_write(bs->byte_map_base, tmp, store_addr);
}
// Loading values by size and signed-ness
void MacroAssembler::load_sized_value(Register s1, RegisterConstant s2, Register d,
int size_in_bytes, bool is_signed) {
switch (size_in_bytes ^ (is_signed ? -1 : 0)) {
case ~8: // fall through:
case 8: ld_long( s1, s2, d ); break;
case ~4: ldsw( s1, s2, d ); break;
case 4: lduw( s1, s2, d ); break;
case ~2: ldsh( s1, s2, d ); break;
case 2: lduh( s1, s2, d ); break;
case ~1: ldsb( s1, s2, d ); break;
case 1: ldub( s1, s2, d ); break;
default: ShouldNotReachHere();
}
}
void MacroAssembler::load_klass(Register src_oop, Register klass) {
// The number of bytes in this code is used by
// MachCallDynamicJavaNode::ret_addr_offset()