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

Example 26 with Word

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

the class Simplifier method refShl.

private static DefUseEffect refShl(Instruction s, OptOptions opts) {
    if (opts.SIMPLIFY_REF_OPS) {
        Operand op2 = Binary.getVal2(s);
        Operand op1 = Binary.getVal1(s);
        if (op2.isIntConstant()) {
            int val2 = op2.asIntConstant().value;
            if (op1.isConstant() && !op1.isMovableObjectConstant()) {
                // BOTH CONSTANTS: FOLD
                Word val1 = getAddressValue(op1).toWord();
                Move.mutate(s, REF_MOVE, Binary.getClearResult(s), AC(val1.lsh(val2).toAddress()));
                return DefUseEffect.MOVE_FOLDED;
            } else {
                // ONLY OP2 IS CONSTANT: ATTEMPT TO APPLY AXIOMS
                if (val2 == 0) {
                    // x << 0 == x
                    Move.mutate(s, REF_MOVE, Binary.getClearResult(s), Binary.getClearVal1(s));
                    return DefUseEffect.MOVE_REDUCED;
                }
                if ((val2 >= BITS_IN_ADDRESS) || (val2 < 0)) {
                    // x << 32 == 0
                    Move.mutate(s, REF_MOVE, Binary.getClearResult(s), IC(0));
                    return DefUseEffect.MOVE_FOLDED;
                }
            }
        } else if (op1.isConstant() && !op1.isMovableObjectConstant()) {
            Word val1 = getAddressValue(op1).toWord();
            // ONLY OP1 IS CONSTANT: ATTEMPT TO APPLY AXIOMS
            if (val1.isZero()) {
                // 0 << x == 0
                Move.mutate(s, REF_MOVE, Binary.getClearResult(s), AC(Address.zero()));
                return DefUseEffect.MOVE_FOLDED;
            }
        }
    }
    return DefUseEffect.UNCHANGED;
}

Example 27 with Word

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

the class Simplifier method refNeg.

private static DefUseEffect refNeg(Instruction s, OptOptions opts) {
    if (opts.SIMPLIFY_REF_OPS) {
        Operand op = Unary.getVal(s);
        if (op.isConstant() && !op.isMovableObjectConstant()) {
            // CONSTANT: FOLD
            Word val = getAddressValue(op).toWord();
            Word negVal = Word.zero().minus(val);
            Move.mutate(s, REF_MOVE, Unary.getClearResult(s), AC(negVal.toAddress()));
            return DefUseEffect.MOVE_FOLDED;
        }
    }
    return DefUseEffect.UNCHANGED;
}

Example 28 with Word

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

the class Simplifier method refShr.

private static DefUseEffect refShr(Instruction s, OptOptions opts) {
    if (opts.SIMPLIFY_REF_OPS) {
        Operand op1 = Binary.getVal1(s);
        Operand op2 = Binary.getVal2(s);
        if (op2.isIntConstant()) {
            int val2 = op2.asIntConstant().value;
            if (op1.isConstant() && !op1.isMovableObjectConstant()) {
                // BOTH CONSTANTS: FOLD
                Word val1 = getAddressValue(op1).toWord();
                Move.mutate(s, REF_MOVE, Binary.getClearResult(s), AC(val1.rsha(val2).toAddress()));
                return DefUseEffect.MOVE_FOLDED;
            } else {
                // ONLY OP2 IS CONSTANT: ATTEMPT TO APPLY AXIOMS
                if (val2 == 0) {
                    // x >> 0 == x
                    Move.mutate(s, REF_MOVE, Binary.getClearResult(s), Binary.getClearVal1(s));
                    return DefUseEffect.MOVE_REDUCED;
                }
                if ((val2 >= BITS_IN_ADDRESS) || (val2 < 0)) {
                    // x >> 32 == x >> 31
                    Binary.setVal2(s, IC(BITS_IN_ADDRESS - 1));
                    return DefUseEffect.UNCHANGED;
                }
            }
        } else if (op1.isConstant() && !op1.isMovableObjectConstant()) {
            Word val1 = getAddressValue(op1).toWord();
            // -1 >> x == -1, 0 >> x == 0
            if (val1.EQ(Word.zero()) || val1.EQ(Word.zero().minus(Word.one()))) {
                Move.mutate(s, REF_MOVE, Binary.getClearResult(s), op1);
                return DefUseEffect.MOVE_FOLDED;
            }
        }
    }
    return DefUseEffect.UNCHANGED;
}

Example 29 with Word

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

the class TestNullChecks_Resolved 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;
    }
}

Example 30 with Word

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

the class TestNullChecks_Unresolved_ReadFromNonNullObject 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;
    }
}