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kvisc/vm/in/FLAGS
2019-06-23 12:40:18 +02:00

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# The OS/K Team licenses this file to you under the MIT license.
# See the LICENSE file in the project root for more information.
#---------------------------------------------------------------------------#
# Flag manipulation instructions #
#---------------------------------------------------------------------------#
#
# Clear or set interrupt flag (CLI/STI)
#
# Throws:
# #SYS if not in supervisor mode
#
cli
sti
#
# Clear or set direction flag (CLD/STD)
#
cld
std
#
# Complement, clear or set carry flag (CMC/CLC/STC)
#
cmc
clc
stc
#
# Load FLG register (LODF)
#
# $1 = FLG
#
lodf rm
#
# Store FLG register - lower byte only (STOFB)
#
# FLG[7:0] = $1[7:0]
#
# Note: FLG's lower byte contains CF, OF, ZF, SF, PF and DF
#
stofb rm