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mask out least significant bits during class dereference in generated code

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This commit is contained in:
Joel Dice 2007-10-17 19:25:30 -06:00
parent 1aee58e390
commit 569c81019c
1 changed files with 12 additions and 5 deletions
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17
src/compile.cpp
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@ -1848,12 +1848,16 @@ class Assembler {
}
void and_(int32_t v, Register dst) {
assert(code.s, isByte(v)); // todo
rex();
code.append(0x83);
code.append(0xe0 | dst);
code.append(v);
if (isByte(v)) {
code.append(0x83);
code.append(0xe0 | dst);
code.append(v);
} else {
code.append(0x81);
code.append(0xe0 | dst);
code.append(v);
}
}
void shl(int8_t v, Register dst) {
@ -2921,6 +2925,7 @@ class JavaCompiler: public Compiler {
mov(poolRegister(), poolReference(class_), rcx);
mov(rax, 0, rax);
and_(PointerMask, rax);
cmp(rcx, rax);
je(next);
@ -3633,6 +3638,7 @@ class JavaCompiler: public Compiler {
mov(poolRegister(), poolReference(class_), rcx);
mov(rax, 0, rax);
and_(PointerMask, rax);
cmp(rcx, rax);
jne(call);
@ -3733,6 +3739,7 @@ class JavaCompiler: public Compiler {
mov(rsp, instance, rax); // load instance
mov(rax, 0, rax); // load class
and_(PointerMask, rax); // clean pointer
mov(rax, ClassVirtualTable, rax); // load vtable
mov(rax, offset, rax); // load method