1 package net.mograsim.logic.ui.am2900;
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3 public final class TestUtil
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11 * Transforms the last four bits of an int to a string that contains the binary ('1' and '0') representation of the 4 bits
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13 * @author Christian Femers
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15 public static String to4bitBin(int x)
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17 StringBuilder sb = new StringBuilder(4);
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18 sb.append((x & 0b1000) == 0 ? '0' : '1');
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19 sb.append((x & 0b0100) == 0 ? '0' : '1');
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20 sb.append((x & 0b0010) == 0 ? '0' : '1');
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21 sb.append((x & 0b0001) == 0 ? '0' : '1');
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22 return sb.toString();
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26 * Transforms the given boolean to a string that contains the binary ('1' and '0') representation of the bit
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28 * @author Christian Femers
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30 public static String to1bitBin(boolean bitIsSet)
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32 return bitIsSet ? "1" : "0";
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36 * Transforms the given int to a string that contains the binary ('1' and '0') representation of the int. "0" is only returned when the
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37 * int is equal to zero.
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39 * @author Christian Femers
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41 public static String to1bitBin(int someInt)
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43 return someInt != 0 ? "1" : "0";
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47 * Transforms a 4 bit signed integer (-8 to 7) to a int representing the same number. (Adding leading 1-bits if the 4 bit int is
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50 * @author Christian Femers
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52 public static int signed4ToSigned32(int signed4bit)
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54 if ((signed4bit & 0b1000) > 0)
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55 return signed4bit | 0xFF_FF_FF_F0;
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56 return signed4bit & 0x00_00_00_0F;
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60 * Transforms a 16 bit signed integer (-32768 to 32767 - a short) to a int representing the same number. (Adding leading 1-bits if the
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61 * 16 bit int is negative)
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63 * @author Christian Femers
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65 public static int signed16ToSigned32(int signed16bit)
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67 return (short) signed16bit;
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71 * Transforms the last n bits of an int to a string that contains the binary ('1' and '0') representation of the n bits
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73 * @author Christian Femers
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75 public static String toNbitString(int x, int n)
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77 StringBuilder sb = new StringBuilder(n);
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78 for (int i = 0; i < n; i++)
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80 sb.append((x >> i) & 1);
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82 return sb.reverse().toString();
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