bitwise_reverse32
WARNING: May produce unexpected results with Game Maker 6 including crashing.
Well known precision problems in Game Maker 6 reduce integer support to only 23 bits.
Certain combinations of high-order bits have special meaning to the 32-bit floating point routines.
Many of these combinations will crash Game Maker 6.
bitwise_reverse32(n) Returns the given 32-bit number with bits in reverse order.
/*
** Usage:
** bitwise_reverse32(n)
**
** Arguments:
** n a 32-bit integer
**
** Returns:
** the given number with bits in reverse order
**
** GMLscripts.com
*/
{
var n;
n = argument0;
n = (n & $55555555) << 1 | (n & $AAAAAAAA) >> 1;
n = (n & $33333333) << 2 | (n & $CCCCCCCC) >> 2;
n = (n & $0F0F0F0F) << 4 | (n & $F0F0F0F0) >> 4;
n = (n & $00FF00FF) << 8 | (n & $FF00FF00) >> 8;
n = (n & $0000FFFF) << 16 | (n & $FFFF0000) >> 16;
return n;
}
** Usage:
** bitwise_reverse32(n)
**
** Arguments:
** n a 32-bit integer
**
** Returns:
** the given number with bits in reverse order
**
** GMLscripts.com
*/
{
var n;
n = argument0;
n = (n & $55555555) << 1 | (n & $AAAAAAAA) >> 1;
n = (n & $33333333) << 2 | (n & $CCCCCCCC) >> 2;
n = (n & $0F0F0F0F) << 4 | (n & $F0F0F0F0) >> 4;
n = (n & $00FF00FF) << 8 | (n & $FF00FF00) >> 8;
n = (n & $0000FFFF) << 16 | (n & $FFFF0000) >> 16;
return n;
}
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Projects: 8
Related: bitwise_reverse16, bitwise_reverse32, bitwise_reverse8, bitwise_rol, bitwise_ror
Contributor: xot
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