171 lines
2.8 KiB
Plaintext
171 lines
2.8 KiB
Plaintext
# The OS/K Team licenses this file to you under the MIT license.
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# See the LICENSE file in the project root for more information.
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#---------------------------------------------------------------------------#
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# Arithmetic instructions #
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#---------------------------------------------------------------------------#
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#
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# CMP Comparison instruction
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#
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# $1 - $2
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#
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# Sets CF if unsigned integer overflow occur, clears it otherwise
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# Sets OF is signed integer overflow occur, clears it otherwise
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# Sets ZF and SF according to the result
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#
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cmp r ri
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cmp m ri
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#
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# Arithmetical SGN operation
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#
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# IF ($1 == 0) THEN
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# $2 = 0
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# ELIF ($1 GT 0) THEN
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# $2 = 1
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# ELSE
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# $2 = LONG_MIN
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# FI
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#
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# Treats $1 and $2 as signed values
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#
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# Preserves all flags
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#
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sgn r r
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#
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# Arithmetical NEG operation
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#
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# $1 = NOT($2) + 1
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#
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# Preserves all flags
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#
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neg r r
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#
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# Arithmetical INC operation
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#
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# $1 = $1 + 1
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#
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# Preserves all flags
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#
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inc rm
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#
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# Arithmetical DEC operation
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#
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# $1 = $1 - 1
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#
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# Preserves all flags
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#
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dec rm
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#
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# Arithmetical ADD operation
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#
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# $dest1 = $src1 + $src2
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#
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# Sets CF if unsigned integer overflow occur, clears it otherwise
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# Sets OF is signed integer overflow occur, clears it otherwise
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# Sets ZF and SF according to the result
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#
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add r rim
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add r r ri
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add m ri
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add m r ri
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addf r ri
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addf r r ri
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#
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# Atomic exchange and add (XADD)
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#
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# $tmp = $1
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# $1 = $1 + $2
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# $2 = $1
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#
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# Preserves all flags
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#
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xadd r rm
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xadd m r
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#
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# Arithmetical SUB operation
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#
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# $dest = $src1 - $src2
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#
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# Sets CF if unsigned integer overflow occur, clears it otherwise
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# Sets OF is signed integer overflow occur, clears it otherwise
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# Sets ZF and SF according to the result
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#
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sub r rim
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sub r r ri
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sub m ri
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sub m r ri
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subf r ri
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subf r r ri
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#
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# Arithmetical ADD/SUB operation, with carry/overflow
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#
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# $dest = $src1 + $src2 + CF (ADC)
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# $dest = $src1 + $src2 + OF (ADO)
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# $dest = $src1 - $src2 - CF (SBB)
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# $dest = $src1 - $src2 - OF (SBO)
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#
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# Preserves ZF and SF
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# Flags CF and OF are undefined for now
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#
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adc r r
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ado r r
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sbb r r
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sbo r r
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#
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# Arithmetical unsigned MUL operation
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#
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# $dest = LO($src1 * $src2)
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#
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# Preserves ZF and SF
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# Sets CF and OF if HI($src1 * $src2) > 0, clears them otherwise
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#
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mul r ri
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mul r r ri
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mulf r r ri
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# Arithmetical unsigned MUL operation
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#
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# $dest1 = HI($dest2 * $src)
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# $dest2 = LO($dest2 * $src)
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#
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# Sets CF and OF if HI($2 * $3) > 0, clears them otherwise
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# Preserves ZF and SF
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#
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mulhi r r ri
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#
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# Arithmetical unsigned DIV operation
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#
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# $dest1 = $1 DIV $2
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#
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# Preserves all flags
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#
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div r ri
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div r r ri
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#
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# Arithmetical unsigned modulo operation (REM)
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#
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# $1 = $1 MOD $2
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#
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# Preserves all flags
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#
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rem r ri
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rem r r ri
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