Examples with AMD64ShiftOp org.graalvm.compiler.lir.amd64.AMD64ShiftOp used on opensource projects

Example 1 with AMD64ShiftOp

use of org.graalvm.compiler.lir.amd64.AMD64ShiftOp in project graal by oracle.

the class AMD64ArithmeticLIRGenerator method emitShift.

private Variable emitShift(AMD64Shift op, OperandSize size, Value a, Value b) {
    Variable result = getLIRGen().newVariable(LIRKind.combine(a, b).changeType(a.getPlatformKind()));
    AllocatableValue input = getLIRGen().asAllocatable(a);
    if (isJavaConstant(b)) {
        JavaConstant c = asJavaConstant(b);
        if (c.asLong() == 1) {
            getLIRGen().append(new AMD64Unary.MOp(op.m1Op, size, result, input));
        } else {
            /*
                 * c is implicitly masked to 5 or 6 bits by the CPU, so casting it to (int) is
                 * always correct, even without the NumUtil.is32bit() test.
                 */
            getLIRGen().append(new AMD64Binary.ConstOp(op.miOp, size, result, input, (int) c.asLong()));
        }
    } else {
        getLIRGen().emitMove(RCX_I, b);
        getLIRGen().append(new AMD64ShiftOp(op.mcOp, size, result, input, RCX_I));
    }
    return result;
}