LLVMCTypeIntrinsics.java

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package com.oracle.truffle.llvm.nodes.intrinsics.c;

import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.dsl.NodeChild;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.llvm.nodes.intrinsics.llvm.LLVMIntrinsic;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMExpressionNode;

@NodeChild(type = LLVMExpressionNode.class)
public abstract class LLVMCTypeIntrinsics extends LLVMIntrinsic {

    public static boolean isLowercaseLetter(int value) {
        return value >= 'a' && value <= 'z';
    }

    public static boolean isUppercaseLetter(int value) {
        return value >= 'A' && value <= 'Z';
    }

    public static boolean isAsciiCharacter(int value) {
        return value >= 0 && value < 128;
    }

    public abstract static class LLVMToUpper extends LLVMCTypeIntrinsics {

        @Specialization(guards = "isLowercaseLetter(value)")
        public int fromLower(int value) {
            return value - 0x20;
        }

        @Specialization(guards = "isUppercaseLetter(value)")
        public int fromUpper(int value) {
            return value;
        }

        @Specialization(guards = "isAsciiCharacter(value)")
        public int fromCharacter(int value) {
            if (isLowercaseLetter(value)) {
                return fromLower(value);
            }
            return value;
        }

        @Specialization(replaces = {"fromLower", "fromUpper", "fromCharacter"})
        @TruffleBoundary
        public int executeIntrinsic(int value) {
            return Character.toUpperCase(value);
        }

    }

    public abstract static class LLVMTolower extends LLVMCTypeIntrinsics {

        @Specialization(guards = "isLowercaseLetter(value)")
        public int fromLower(int value) {
            return value;
        }

        @Specialization(guards = "isUppercaseLetter(value)")
        public int fromUpper(int value) {
            return value + 0x20;
        }

        @Specialization(guards = "isAsciiCharacter(value)")
        public int fromCharacter(int value) {
            if (isUppercaseLetter(value)) {
                return fromUpper(value);
            }
            return value;
        }

        @Specialization(replaces = {"fromLower", "fromUpper", "fromCharacter"})
        @TruffleBoundary
        public int executeIntrinsic(int value) {
            return Character.toLowerCase(value);
        }

    }

    public abstract static class LLVMIsalpha extends LLVMCTypeIntrinsics {

        @Specialization
        @TruffleBoundary
        public int executeIntrinsic(int value) {
            return Character.isAlphabetic(value) ? 1 : 0;
        }

    }

    public abstract static class LLVMIsspace extends LLVMCTypeIntrinsics {

        @Specialization
        @TruffleBoundary
        public int executeIntrinsic(int value) {
            return Character.isWhitespace(value) ? 1 : 0;
        }

    }

    public abstract static class LLVMIsupper extends LLVMCTypeIntrinsics {

        @Specialization(guards = "isLowercaseLetter(value)")
        public int fromLower(@SuppressWarnings("unused") int value) {
            return 0;
        }

        @Specialization(guards = "isUppercaseLetter(value)")
        public int fromUpper(@SuppressWarnings("unused") int value) {
            return 1;
        }

        @Specialization(guards = "isAsciiCharacter(value)")
        public int fromCharacter(int value) {
            if (isUppercaseLetter(value)) {
                return 1;
            }
            return 0;
        }

        @Specialization(replaces = {"fromLower", "fromUpper", "fromCharacter"})
        @TruffleBoundary
        public int executeIntrinsic(int value) {
            return Character.isUpperCase(value) ? 1 : 0;
        }

    }
}