Examples with Word org.vmmagic.unboxed.Word used on opensource projects

Example 36 with Word

use of org.vmmagic.unboxed.Word in project JikesRVM by JikesRVM.

the class Simplifier method refXor.

private static DefUseEffect refXor(Instruction s, OptOptions opts) {
    if (opts.SIMPLIFY_REF_OPS) {
        canonicalizeCommutativeOperator(s);
        Operand op1 = Binary.getVal1(s);
        Operand op2 = Binary.getVal2(s);
        if (op1.similar(op2)) {
            // THE SAME OPERAND: x ^ x == 0
            Move.mutate(s, REF_MOVE, Binary.getClearResult(s), IC(0));
            return DefUseEffect.MOVE_FOLDED;
        }
        if (op2.isConstant() && !op2.isMovableObjectConstant()) {
            Word val2 = getAddressValue(op2).toWord();
            if (op1.isConstant() && !op1.isMovableObjectConstant()) {
                // BOTH CONSTANTS: FOLD
                Word val1 = getAddressValue(op1).toWord();
                Move.mutate(s, REF_MOVE, Binary.getClearResult(s), AC(val1.xor(val2).toAddress()));
                return DefUseEffect.MOVE_FOLDED;
            } else {
                // ONLY OP2 IS CONSTANT: ATTEMPT TO APPLY AXIOMS
                if (val2.isMax()) {
                    // x ^ -1 == x ^ 0xffffffff = ~x
                    Unary.mutate(s, REF_NOT, Binary.getClearResult(s), Binary.getClearVal1(s));
                    return DefUseEffect.REDUCED;
                }
                if (val2.isZero()) {
                    // x ^ 0 == x
                    Move.mutate(s, REF_MOVE, Binary.getClearResult(s), Binary.getClearVal1(s));
                    return DefUseEffect.MOVE_REDUCED;
                }
            }
        }
    }
    return DefUseEffect.UNCHANGED;
}

Example 37 with Word

use of org.vmmagic.unboxed.Word in project JikesRVM by JikesRVM.

the class Simplifier method refAnd.

private static DefUseEffect refAnd(Instruction s, OptOptions opts) {
    if (opts.SIMPLIFY_REF_OPS) {
        canonicalizeCommutativeOperator(s);
        Operand op1 = Binary.getVal1(s);
        Operand op2 = Binary.getVal2(s);
        if (op1.similar(op2)) {
            // THE SAME OPERAND: x & x == x
            Move.mutate(s, REF_MOVE, Binary.getClearResult(s), Binary.getClearVal1(s));
            return op1.isConstant() ? DefUseEffect.MOVE_FOLDED : DefUseEffect.MOVE_REDUCED;
        }
        if (op2.isConstant() && !op2.isMovableObjectConstant()) {
            Word val2 = getAddressValue(op2).toWord();
            if (op1.isConstant() && !op1.isMovableObjectConstant()) {
                // BOTH CONSTANTS: FOLD
                Word val1 = getAddressValue(op1).toWord();
                Move.mutate(s, REF_MOVE, Binary.getClearResult(s), AC(val1.and(val2).toAddress()));
                return DefUseEffect.MOVE_FOLDED;
            } else {
                // ONLY OP2 IS CONSTANT: ATTEMPT TO APPLY AXIOMS
                if (val2.isZero()) {
                    // x & 0 == 0
                    Move.mutate(s, REF_MOVE, Binary.getClearResult(s), AC(Address.zero()));
                    return DefUseEffect.MOVE_FOLDED;
                }
                if (val2.isMax()) {
                    // x & -1 == x & 0xffffffff == x
                    Move.mutate(s, REF_MOVE, Binary.getClearResult(s), Binary.getClearVal1(s));
                    return DefUseEffect.MOVE_REDUCED;
                }
            }
        }
    }
    return DefUseEffect.UNCHANGED;
}

Example 38 with Word

use of org.vmmagic.unboxed.Word in project JikesRVM by JikesRVM.

the class Simplifier method refOr.

private static DefUseEffect refOr(Instruction s, OptOptions opts) {
    if (opts.SIMPLIFY_REF_OPS) {
        canonicalizeCommutativeOperator(s);
        Operand op1 = Binary.getVal1(s);
        Operand op2 = Binary.getVal2(s);
        if (op1.similar(op2)) {
            // THE SAME OPERAND: x | x == x
            Move.mutate(s, REF_MOVE, Binary.getClearResult(s), Binary.getClearVal1(s));
            return op1.isConstant() ? DefUseEffect.MOVE_FOLDED : DefUseEffect.MOVE_REDUCED;
        }
        if (op2.isConstant() && !op2.isMovableObjectConstant()) {
            Word val2 = getAddressValue(op2).toWord();
            if (op1.isAddressConstant()) {
                // BOTH CONSTANTS: FOLD
                Word val1 = getAddressValue(op1).toWord();
                Move.mutate(s, REF_MOVE, Binary.getClearResult(s), AC(val1.or(val2).toAddress()));
                return DefUseEffect.MOVE_FOLDED;
            } else {
                // ONLY OP2 IS CONSTANT: ATTEMPT TO APPLY AXIOMS
                if (val2.isMax()) {
                    // x | -1 == x | 0xffffffff == 0xffffffff == -1
                    Move.mutate(s, REF_MOVE, Binary.getClearResult(s), AC(Address.max()));
                    return DefUseEffect.MOVE_FOLDED;
                }
                if (val2.isZero()) {
                    // x | 0 == x
                    Move.mutate(s, REF_MOVE, Binary.getClearResult(s), Binary.getClearVal1(s));
                    return DefUseEffect.MOVE_REDUCED;
                }
            }
        }
    }
    return DefUseEffect.UNCHANGED;
}

Example 39 with Word

use of org.vmmagic.unboxed.Word in project JikesRVM by JikesRVM.

the class TestNullChecks_Resolved method readVolatileWordField.

private static Word readVolatileWordField(ClassWithVolatileWordField c) {
    try {
        Word readVolatile = c.w;
        System.out.println("Read value " + readVolatile.toLong() + " from field");
        return readVolatile;
    } catch (NullPointerException npe) {
        System.out.println("Caught NPE when reading Word field");
        return NPE_WORD;
    }
}

Example 40 with Word

use of org.vmmagic.unboxed.Word in project JikesRVM by JikesRVM.

the class TestNullChecks_Unresolved_ReadFromNonNullObject method readWordField.

private static Word readWordField(ClassWithWordField c) {
    try {
        Word read = c.w;
        System.out.println("Read value " + read.toLong() + " from field");
        return read;
    } catch (NullPointerException npe) {
        System.out.println("Caught NPE when reading Word field");
        return NPE_WORD;
    }
}