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kvisc/vm/in/ALU
2019-07-17 20:26:03 +02:00

267 lines
4.2 KiB
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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.
#---------------------------------------------------------------------------#
# 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 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 r ri
# $dest = NOT($src1 AND $src2)
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 r ri
# $dest = NOT($src1 XOR $src2)
xnor r r ri
#
# Logical left/right shift (SHL/SHR)
#
# $dest = $src1 << $src2 (SHL)
# $dest = $src1 >> $src2 (SHR)
#
# Preserves all flags
#
shl r r ri
shr r r ri
#
# Arithmetical left/right shift (SAL/SAR)
#
# $dest = $src1 <<< $src2 (SAL)
# $dest = $src1 >>> $src2 (SAR)
#
# Preserves all flags
#
sal r r ri
sar r r ri
#---------------------------------------------------------------------------#
# Arithmetic instructions #
#---------------------------------------------------------------------------#
#
# CMP Comparison instruction
#
# $1 - $2
#
# Sets CF if unsigned integer overflow occur, clears it otherwise
# Sets OF is signed integer overflow occur, clears it otherwise
# Sets ZF and SF according to the result
#
cmp r ri
cmp m ri
#
# Arithmetical SGN operation
#
# IF ($1 == 0) THEN
# $2 = 0
# ELIF ($1 GT 0) THEN
# $2 = 1
# ELSE
# $2 = LONG_MIN
# FI
#
# Treats $1 and $2 as signed values
#
# Preserves all flags
#
sgn r r
#
# Arithmetical NEG operation
#
# $1 = NOT($2) + 1
#
# Preserves all flags
#
neg r r
#
# Arithmetical INC operation
#
# $1 = $1 + 1
#
# Preserves all flags
#
inc rm
#
# Arithmetical DEC operation
#
# $1 = $1 - 1
#
# Preserves all flags
#
dec rm
#
# Arithmetical ADD operation
#
# $dest1 = $src1 + $src2
#
# Sets CF if unsigned integer overflow occur, clears it otherwise
# Sets OF is signed integer overflow occur, clears it otherwise
# Sets ZF and SF according to the result
#
add r rim
add r r ri
add m ri
addf r r ri
addo r r ri
#
# Atomic exchange and add (XADD)
#
# $tmp = $1
# $1 = $1 + $2
# $2 = $1
#
# Preserves all flags
#
xadd r rm
xadd m r
#
# Arithmetical SUB operation
#
# $dest = $src1 - $src2
#
# Sets CF if unsigned integer overflow occur, clears it otherwise
# Sets OF is signed integer overflow occur, clears it otherwise
# Sets ZF and SF according to the result
#
sub r rim
sub r r ri
sub r i r
sub m ri
subf r r ri
subf r i r
subo r r ri
subo r i r
#
# Arithmetical ADD/SUB operation, with carry/overflow
#
# $dest = $src1 + $src2 + CF (ADC)
# $dest = $src1 + $src2 + OF (ADO)
# $dest = $src1 - $src2 - CF (SBB)
# $dest = $src1 - $src2 - OF (SBO)
#
# Preserves ZF and SF
# Flags CF and OF are undefined for now
#
adcx r r ri
adox r r ri
sbbx r r ri
sbox r r ri
#
# Arithmetical unsigned MUL operation
#
# $dest = LO($src1 * $src2)
#
# Preserves ZF and SF
# Sets CF and OF if HI($src1 * $src2) > 0, clears them otherwise
#
mul r r ri
mulf r r ri
mulo r r ri
# Arithmetical unsigned MUL operation
#
# $dest1 = HI($dest2 * $src)
# $dest2 = LO($dest2 * $src)
#
# Sets CF and OF if HI($2 * $3) > 0, clears them otherwise
# Preserves ZF and SF
#
mulhi r r ri
#
# Arithmetical unsigned DIV operation
#
# $dest1 = $1 DIV $2
#
# Preserves all flags
#
div r r ri
#
# Arithmetical unsigned modulo operation (REM)
#
# $1 = $1 MOD $2
#
# Preserves all flags
#
rem r r ri