| package flate |
| |
| const ( |
| // Masks for shifts with register sizes of the shift value. |
| // This can be used to work around the x86 design of shifting by mod register size. |
| // It can be used when a variable shift is always smaller than the register size. |
| |
| // reg8SizeMaskX - shift value is 8 bits, shifted is X |
| reg8SizeMask8 = 7 |
| reg8SizeMask16 = 15 |
| reg8SizeMask32 = 31 |
| reg8SizeMask64 = 63 |
| |
| // reg16SizeMaskX - shift value is 16 bits, shifted is X |
| reg16SizeMask8 = reg8SizeMask8 |
| reg16SizeMask16 = reg8SizeMask16 |
| reg16SizeMask32 = reg8SizeMask32 |
| reg16SizeMask64 = reg8SizeMask64 |
| |
| // reg32SizeMaskX - shift value is 32 bits, shifted is X |
| reg32SizeMask8 = reg8SizeMask8 |
| reg32SizeMask16 = reg8SizeMask16 |
| reg32SizeMask32 = reg8SizeMask32 |
| reg32SizeMask64 = reg8SizeMask64 |
| |
| // reg64SizeMaskX - shift value is 64 bits, shifted is X |
| reg64SizeMask8 = reg8SizeMask8 |
| reg64SizeMask16 = reg8SizeMask16 |
| reg64SizeMask32 = reg8SizeMask32 |
| reg64SizeMask64 = reg8SizeMask64 |
| |
| // regSizeMaskUintX - shift value is uint, shifted is X |
| regSizeMaskUint8 = reg8SizeMask8 |
| regSizeMaskUint16 = reg8SizeMask16 |
| regSizeMaskUint32 = reg8SizeMask32 |
| regSizeMaskUint64 = reg8SizeMask64 |
| ) |