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why in the world would you use negative values for example bitshift RHS operands?

This commit is contained in:
zeromus 2018-03-13 20:57:54 -04:00
parent d55e03538f
commit 96a13e64f7
1 changed files with 5 additions and 5 deletions
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10
BizHawk.Client.Common/lua/EmuLuaLibrary.Bit.cs
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@ -44,35 +44,35 @@ namespace BizHawk.Client.Common
return val ^ amt;
}
[LuaMethodExample("lshift", "local uibitlsh = bit.lshift( 1000, -4 );")]
[LuaMethodExample("lshift", "local uibitlsh = bit.lshift( 1000, 4 );")]
[LuaMethod("lshift", "Logical shift left of 'val' by 'amt' bits")]
public static uint Lshift(uint val, int amt)
{
return val << amt;
}
[LuaMethodExample("rol", "local uibitrol = bit.rol( 1000, -4 );")]
[LuaMethodExample("rol", "local uibitrol = bit.rol( 1000, 4 );")]
[LuaMethod("rol", "Left rotate 'val' by 'amt' bits")]
public static uint Rol(uint val, int amt)
{
return (val << amt) | (val >> (32 - amt));
}
[LuaMethodExample("ror", "local uibitror = bit.ror( 1000, -4 );")]
[LuaMethodExample("ror", "local uibitror = bit.ror( 1000, 4 );")]
[LuaMethod("ror", "Right rotate 'val' by 'amt' bits")]
public static uint Ror(uint val, int amt)
{
return (val >> amt) | (val << (32 - amt));
}
[LuaMethodExample("rshift", "local uibitrsh = bit.rshift( 1000, -4 );")]
[LuaMethodExample("rshift", "local uibitrsh = bit.rshift( 1000, 4 );")]
[LuaMethod("rshift", "Logical shift right of 'val' by 'amt' bits")]
public static uint Rshift(uint val, int amt)
{
return (uint)(val >> amt);
}
[LuaMethodExample("arshift", "local inbitars = bit.arshift( -1000, -4 );")]
[LuaMethodExample("arshift", "local inbitars = bit.arshift( -1000, 4 );")]
[LuaMethod("arshift", "Arithmetic shift right of 'val' by 'amt' bits")]
public static int Arshift(int val, int amt)
{