kvisc/vm/in/MISC

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

#---------------------------------------------------------------------------#
# Misc. instructions                                                        #
#---------------------------------------------------------------------------#

#
# Do nothing (NOOP)
#
#       (nothing)
#
# Throws:
#       (nothing)
#
# Preserves all flags
#
nop

#
# Pause the CPU for a very short amount of time (PAUSE)
# Used in spin-like loops
#
pause

#
# Pause the CPU for a relatively long time (XPAUSE)
#
# Throws:
#       #SYS if not in supervisor mode
#
xpause

#
# Get timestamp in seconds
#
time r

#
# Get timestamp in µseconds
#
utime r

#
# CPU Identification Number
#
# Does nothing (for now)
#
cpuid

#---------------------------------------------------------------------------#
# Clean-up misc. instructions                                               #
#---------------------------------------------------------------------------#

#
# Clear base volatile registers (CLR)
#
#       RAX = RBX = RCX = RDX = 0
#       RSX = RBI = RDI = RSI = 0
#
clr

#
# Clear argument registers (CLA)
#
#       AX0 = AX1 = AX2 = AX3 = 0
#       AX4 = AX5 = AX6 = AX7 = 0
#
cla

#---------------------------------------------------------------------------#
# Byte-wise / bit-wise manipulation instructions                            #
#---------------------------------------------------------------------------#

#
# Byte/word/dword swap (xSWAP)
#
# Change endianness
#
bswap r r
wswap r r
dswap r r