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51 lines
1.3 KiB
Plaintext
51 lines
1.3 KiB
Plaintext
/**********************************************
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* bitlib - Bit Manipulation Routines for C02 *
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**********************************************/
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/* Duplicate Low Order Nybble in Byte *
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* Args: char b - Byte to Duplicate *
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* Returns: char d - Duplicated Byte */
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char dupl();
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/* Pack Nybbles into Single Byte *
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* Args: char l - Left Nybble *
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* char r - Right Nybble *
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* Returns: char b - Packed Byte */
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char pack();
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/* Rotate Byte Left *
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* Args: char b - Byte to Rotate *
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* char n - Number of Bits *
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* Returns: char r - Rotated Byte */
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char rotl();
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/* Rotate Byte Right *
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* Args: char b - Byte to Rotate *
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* char n - Number of Bits *
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* Returns: char r - Rotated Byte */
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char rotr();
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/* Shift Byte Left *
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* Args: char b - Byte to Shift *
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* char n - Number of Bits *
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* Returns: char r - Shifted Byte */
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char shiftl();
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/* Shift Byte Right *
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* Args: char b - Byte to Shift *
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* char n - Number of Bits *
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* Returns: char r - Shifted Byte */
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char shiftr();
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/* Swap Nybbles in Byte *
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* Args: char b - Byte to Swap *
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* Returns: char d - Swapped Byte */
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char swap();
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/* Unpack Byte into Separate Nybbles *
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* Args: char b - Byte to Unpack *
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* Returns: char l - Left Nybble *
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* char r - Right Nybble */
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char unpack();
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