Lua:bShr

<> Lua API Reference

function bShr(int1, int2) : Integer

Performs a bitwise right shift operation. This function shifts the bits of the first integer (int1) to the right by the number of positions specified in int2. It behaves the same as Lua’s right-shift operator (>) in Cheat Engine.

Function Parameters

Parameter	Type	Description
int1	integer	The value whose bits will be shifted to the right.
int2	integer	The number of bit positions to shift int1.

Returns

An integer representing the result of right-shifting int1 by int2 bits.

Description

Bit shifting right moves every bit of the number toward the less significant side. Each shift effectively divides the value by 2, discarding any remainder.

Binary example (12 >> 2):

0000 1100   (12)
>> 2
--------------
0000 0011   (3)

Right shifting is commonly used for:

• Extracting specific bit fields
• Efficient division by powers of two
• Unpacking packed data

Usage Examples

Simple right shift:

1 print( bShr(12, 2) )   -- 3

Equivalent Lua operator:

1 print( 12 >> 2 )       -- 3

Extracting high nibble of a byte:

1 local byte = 0xAB       -- 10101011
2 local highNibble = bShr(byte, 4)  -- 0xA
3 print(string.format("0x%X", highNibble))

Unpacking a 16-bit value into two 8-bit values:

1 local packed = 0x1234
2 local high = bShr(packed, 8) & 0xFF
3 local low  = packed & 0xFF
4 print(string.format("High: 0x%X, Low: 0x%X", high, low))

Behavior

• Returns an integer.
• Only works on numeric values.
• Bits shifted out on the right are discarded; zeroes are shifted in from the left.
• Equivalent to Lua's native bitwise shift-right operator (>> in CE Lua syntax).

Advanced Examples

Combining shift with OR to manipulate bit fields:

local section = 0xF0
local shifted = bShr(section, 4)  -- move to bits 0–3
local result = bOr(shifted, 0x05)
print(string.format("0x%X", result))

Main Pages

Core Lua documentation entry points

◆ Lua
◆ Script Engine

Bitwise Related Lua Functions

◆ bOr – Bitwise OR
◆ bXor – Bitwise XOR
◆ bAnd – Bitwise AND
◆ bShl – Bitwise Shift Left
◆ bShr – Bitwise Shift Right
◆ bNot – Bitwise NOT