Convert 4x4 matrices in HEX Q31.32 to decimal, requires Java 21 with --enable-preview.

QC.java

import java.util.Arrays;

// run with java QC.java --enable-preview
void main() {
    final String input = """
    0000:0000:B541:00AA 0000:0000:0000:0000 0000:0000:B4CB:D1C9 FFFF:FFE9:5F62:D8D0
    0000:0000:0000:0000 0000:0001:0000:0000 0000:0000:0000:0000 FFFF:FFF0:0000:0000
    FFFF:FFFF:4B37:2E37 0000:0000:0000:0000 0000:0000:B541:00AA FFFF:FFFF:F87D:11F0
    0000:0000:0000:0000 0000:0000:0000:0000 0000:0000:0000:0000 0000:0001:0000:0000
    """;

    /*final String input = """
    0000:0001:0000:0000 0000:0000:0000:0000 0000:0000:0000:0000 FFFF:FFF0:0000:0000
    0000:0000:0000:0000 0000:0001:0000:0000 0000:0000:0000:0000 FFFF:FFF0:0000:0000
    0000:0000:0000:0000 0000:0000:0000:0000 0000:0001:0000:0000 FFFF:FFF0:0000:0000
    0000:0000:0000:0000 0000:0000:0000:0000 0000:0000:0000:0000 0000:0001:0000:0000
    """;*/
    
    final double[] seq = Arrays.stream(input.split("\n"))
            .flatMap(line -> Arrays.stream(line.split(" "))
                    .mapToDouble(x -> convertToDecimal(x.trim()))
                    .boxed()
            ).mapToDouble(x -> x).toArray();
  
    final double[][] matrix44 = new double[][] {
            {seq[ 0], seq[ 1], seq[ 2], seq[ 3]},
            {seq[ 4], seq[ 5], seq[ 6], seq[ 7]},
            {seq[ 8], seq[ 9], seq[10], seq[11]},
            {seq[12], seq[13], seq[14], seq[15]}
    };
    
    printMatrix(matrix44);
}

void printMatrix(double[][] matrix) {
    for (double[] row : matrix) {
        for (int len = row.length, i = 0; i < len; ++i) {
            System.out.printf("%+.8f", row[i]);
            if (i < len - 1) {
                System.out.print(" ");
            }
        }
        System.out.println();
    }
}

double convertToDecimal(String hex) {
    final String[] parts = hex.split(":");
    final String wholeWord = parts[0] + parts[1];
    final String fractWord = parts[2] + parts[3];
    final int whole = Long.valueOf(wholeWord, 16).intValue();
    final double fract = Long.valueOf(fractWord, 16) / Math.pow(2, 32);
    return Double.valueOf(whole + fract);
}