kvisc/vm/in/LOGIC

# The OS/K Team licenses this file to you under the MIT license.
# See the LICENSE file in the project root for more information.

#---------------------------------------------------------------------------#
# Logical instructions                                                      #
#---------------------------------------------------------------------------#

#
# TEST Comparison instruction
#
#       $1 AND $2
#
# Clears OF and CF
# Sets ZF and SF according to the result
#
test r ri

#
# Bitwise NOT operation
#
#       $1 = NOT($2)
#
# Preserves all flags
#
not r r

#
# Bitwise OR operation
#
#       $dest = $src1 OR $src2
#
# Preserves all flags
#
or r ri
or r r ri
or m ri
or m r ri

# $dest = $src1 OR NOT($src2)
orn r ri
orn r r ri

# $dest = NOT($src1 OR $src2)
nor r ri
nor r r ri

#
# Bitwise AND operation
#
#       $dest = $src1 AND $src2
#
# Preserves all flags
#
and r rim
and r r rim
and m ri
and m r ri

# $dest = $src1 AND NOT($src2)
andn r ri
andn r r ri

# $dest = NOT($src1 AND $src2)
nand r ri
nand r r ri

#
# Bitwise XOR operation
# 
#       $dest = $src1 XOR $src2
#
# Preserves all flags
#
xor r rim
xor r r rim
xor m ri
xor m r ri

# $dest = $src1 XOR NOT($src2)
xorn r ri
xorn r r ri

# $dest = NOT($src1 XOR $src2)
xnor r ri
xnor r r ri

# To document

shl r ri
shl r r ri
shl m ri
shl m r ri

shr r ri
shr r r ri
shr m ri
shr m r ri

sal r ri
sal r r ri
sal m ri
sal m r ri

sar r ri
sar r r ri
sar m ri
sar m r ri