Experimenting to determine if change will fix external format problem
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@ -1,39 +1,49 @@
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* Instruction Listing
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** 00 xx xx xx :: NOP
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00 00 00 00 # Proper NOP
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00 xx xx xx # NOP equivelent, although these instructions will all be treated as NOPs. DO NOT USE THEM.
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| Hex | Name | Comment |
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|-------------+-----------------+---------------------------------------------------------------------------|
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| 00 00 00 00 | Proper NOP | |
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| 00 xx xx xx | NOP equivelent. | Although these instructions will all be treated as NOPs. DO NOT USE THEM. |
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** 4OP Groups
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4OP nn is the XOP, a = b OP c Cond d
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*** 01 nn ab cd :: 4OP Integer group
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**** Add subgroup
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01 00 ab cd # ADD.CI a b c d :: a = b + c + CARRY? d [signed]
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01 01 ab cd # ADD.CO a b c d :: a = b + c; d = CARRY? [signed]
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01 02 ab cd # ADD.CIO a b c d :: a = b + c + CARRY? d; d = CARRY? [signed]
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01 03 ab cd # ADDU.CI a b c d :: a = b + c + CARRY? d [unsigned]
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01 04 ab cd # ADDU.CO a b c d :: a = b + c; d = CARRY? [unsigned]
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01 05 ab cd # ADDU.CIO a b c d :: a = b + c + CARRY? d; d = CARRY? [unsigned]
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| Hex | Name | Comment |
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|-------------+------------------+---------------------------------------------|
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| 01 00 ab cd | ADD.CI a b c d | a = b + c + CARRY? d [signed] |
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| 01 01 ab cd | ADD.CO a b c d | a = b + c; d = CARRY? [signed] |
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| 01 02 ab cd | ADD.CIO a b c d | a = b + c + CARRY? d; d = CARRY? [signed] |
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| 01 03 ab cd | ADDU.CI a b c d | a = b + c + CARRY? d [unsigned] |
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| 01 04 ab cd | ADDU.CO a b c d | a = b + c; d = CARRY? [unsigned] |
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| 01 05 ab cd | ADDU.CIO a b c d | a = b + c + CARRY? d; d = CARRY? [unsigned] |
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**** Subtract subgroup
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01 06 ab cd # SUB.BI a b c d :: a = b - c - BORROW? d [signed]
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01 07 ab cd # SUB.BO a b c d :: a = b - c; d = BORROW? [signed]
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01 08 ab cd # SUB.BIO a b c d :: a = b - c - BORROW? d; d = BORROW? [signed]
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01 09 ab cd # SUBU.BI a b c d :: a = b - c - BORROW? d [unsigned]
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01 0A ab cd # SUBU.BO a b c d :: a = b - c; d = BORROW? [unsigned]
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01 0B ab cd # SUBU.BIO a b c d :: a = b - c - BORROW? d; d = BORROW? [unsigned]
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| Hex | Name | Comment |
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|-------------+------------------+-----------------------------------------------|
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| 01 06 ab cd | SUB.BI a b c d | a = b - c - BORROW? d [signed] |
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| 01 07 ab cd | SUB.BO a b c d | a = b - c; d = BORROW? [signed] |
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| 01 08 ab cd | SUB.BIO a b c d | a = b - c - BORROW? d; d = BORROW? [signed] |
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| 01 09 ab cd | SUBU.BI a b c d | a = b - c - BORROW? d [unsigned] |
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| 01 0A ab cd | SUBU.BO a b c d | a = b - c; d = BORROW? [unsigned] |
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| 01 0B ab cd | SUBU.BIO a b c d | a = b - c - BORROW? d; d = BORROW? [unsigned] |
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**** long math subgroup
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01 0C ab cd # MULTIPLY a b c d :: a = MUL c d; b = MULH c d [signed]
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01 0D ab cd # MULTIPLYU a b c d :: a = MUL c d; b = MULH c d [unsigned]
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01 0E ab cd # DIVIDE a b c d :: a = DIV c d; b = MOD c d [signed]
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01 0F ab cd # DIVIDEU a b c d :: a = DIV c d; b = MOD c d [unsigned]
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| Hex | Name | Comment |
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|-------------+-------------------+--------------------------------------|
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| 01 0C ab cd | MULTIPLY a b c d | a = MUL c d; b = MULH c d [signed] |
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| 01 0D ab cd | MULTIPLYU a b c d | a = MUL c d; b = MULH c d [unsigned] |
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| 01 0E ab cd | DIVIDE a b c d | a = DIV c d; b = MOD c d [signed] |
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| 01 0F ab cd | DIVIDEU a b c d | a = DIV c d; b = MOD c d [unsigned] |
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**** Logic subgroup
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01 10 ab cd # MUX a b c d :: a = (c & ~b) | (d & b)
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01 11 ab cd # NMUX a b c d :: a = (c & b) | (d & ~b)
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01 12 ab cd # SORT a b c d :: a = MAX(c, d); b = MIN(c, d) [signed]
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01 13 ab cd # SORTU a b c d :: a = MAX(c, d); b = MIN(c, d) [unsigned]
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| Hex | Name | Comment |
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|-------------+---------------+-----------------------------------------|
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| 01 10 ab cd | MUX a b c d | a = (c & ~b) \vert (d & b) |
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| 01 11 ab cd | NMUX a b c d | a = (c & b) \vert (d & ~b) |
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| 01 12 ab cd | SORT a b c d | a = MAX(c, d); b = MIN(c, d) [signed] |
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| 01 13 ab cd | SORTU a b c d | a = MAX(c, d); b = MIN(c, d) [unsigned] |
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**** Reserved Block
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01 14 xx xx # Reserved
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