Difference between revisions of "Lua:signExtend"
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===Examples=== | ===Examples=== | ||
| − | < | + | <syntaxhighlight lang="lua" line> |
local value = signExtend(0x7F, 7) | local value = signExtend(0x7F, 7) | ||
print(value) | print(value) | ||
-- 127 | -- 127 | ||
| − | </ | + | </syntaxhighlight> |
| − | < | + | <syntaxhighlight lang="lua" line> |
local value = signExtend(0x80, 7) | local value = signExtend(0x80, 7) | ||
print(value) | print(value) | ||
-- -128 | -- -128 | ||
| − | </ | + | </syntaxhighlight> |
| − | < | + | <syntaxhighlight lang="lua" line> |
local value = signExtend(0xFF, 7) | local value = signExtend(0xFF, 7) | ||
print(value) | print(value) | ||
-- -1 | -- -1 | ||
| − | </ | + | </syntaxhighlight> |
{{LuaSeeAlso}} | {{LuaSeeAlso}} | ||
Latest revision as of 23:26, 26 June 2026
Sign-extends the given value.
If the specified most significant bit is set, the value will be extended as a negative signed integer. If the bit is not set, the value remains positive.
Function Parameters[edit]
| Parameter | Type | Description |
|---|---|---|
| value | Integer | The value to sign-extend. |
| mostSignificantBit | Integer | The bit index to treat as the most significant sign bit. |
Returns[edit]
integer — The sign-extended integer value.
Examples[edit]
1 local value = signExtend(0x7F, 7)
2
3 print(value)
4 -- 127
1 local value = signExtend(0x80, 7)
2
3 print(value)
4 -- -128
1 local value = signExtend(0xFF, 7)
2
3 print(value)
4 -- -1
