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120 lines
3.8 KiB
120 lines
3.8 KiB
13 years ago
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32-bit op-code bit definitions
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Machine model:
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SPB 32-bit Pascal stack base address
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SP 32-bit Pascal stack pointer
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LSP 32-bit Level stack pointer
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CSB 32-bit Character stack base address
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CSP 32-bit Character stack pointer
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DS 32-bit Data size register (for multiple reg transfers)
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PC 32-bit Program Counter
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CC Condition code register
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--- Volatile general purpose registers
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--- Static general purpose registers
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Condition codes: Z(ero), N(egative)
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+=====+=====+
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| Z | N |
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+=====+=====+=====+
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| EQ | 1 | - |
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| NEQ | 0 | - |
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| LT | - | 1 |
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| GTE | - | 0 |
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| GT | 0 | 0 |
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| LTE | 1 | 1 |
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+=====+=====+=====+
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Opcode Encoding Summary:
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0rxx xxxx 1rxxx xxxx
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xr00 0000 NOP LD uoffs4
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xr00 0001 NEG LDH uoffs3
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xr00 0010 ABS LDB uoffs
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xr00 0011 INC LDM uoffs4
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xr00 0100 DEC ST uoffs4
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xr00 0101 NOT STH uoffs2
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xr00 0110 ADD STB uoffs
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xr00 0111 SUB STM uoffs4
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xr00 1000 MUL LDX uoffs4
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xr00 1001 DIV LDXH uoffs2
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xr00 1010 MOD LDXB uoffs
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xr00 1011 SLL LDXM uoffs4
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xr00 1100 SRL STX uoffs4
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xr00 1101 SRA STXH uoffs2
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xr00 1110 OR STXB uoffs
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xr00 1111 AND STXM uoffs
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xr01 0000 EQUZ JEQUZ ilbl
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xr01 0001 NEQZ JNEQZ ilbl
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xr01 0010 LTZ JLTZ ilbl
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xr01 0011 GTEZ JGTEZ ilbl
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xr01 0100 GTZ JGTZ ilbl
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xr01 0101 LTEZ JLTEZ ilbl
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xr01 0110 --- JMP ilbl
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xr01 0111 --- PUSH nn
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xr01 1000 EQU JEQU ilbl
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xr01 1001 NEQ JNEQ ilbl
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xr01 1010 LT JLT ilbl
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xr01 1011 GTE JGTE ilbl
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xr01 1100 GT JGT ilbl
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xr01 1101 LTE JLTE ilbl
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xr01 1110 --- ---
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xr01 1111 BIT INDS nn
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xr10 0000 LDI LDS offs4
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xr10 0001 LDIH LDSH offs3
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xr10 0010 LDIB LDSB offs
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xr10 0011 LDIM LDSM offs4
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xr10 0100 STI STS offs4
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xr10 0101 STIH STSH offs2
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xr10 0110 STIB STSB offs
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xr10 0111 STIM STSM offs4
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xr10 1000 DUP LDSX offs4
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xr10 1001 --- LDSXH offs2
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xr10 1010 PUSHS LDSXB offs
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xr10 1011 POPS LDSXM offs4
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xr10 1100 --- STSX offs4
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xr10 1101 --- STSXH offs2
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xr10 1110 --- STSXB offs
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xr10 1111 RET STSXM offs
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xr11 0000 --- LA uoffs
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xr11 0001 --- LAS offs
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xr11 0010 --- LAC dlbl
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xr11 0011 --- ---
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xr11 0100 --- LAX uoffs
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xr11 0101 --- LASX offs
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xr11 0110 --- SLSP level
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xr11 0111 --- SDC uu
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xr11 1000 --- ---
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xr11 1001 --- PCAL ilbl
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xr11 1010 --- SYSIO fn,sop
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xr11 1011 --- LIB lop
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xr11 1100 --- FLOAT fop
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xr11 1101 --- *LABEL ilbl
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xr11 1110 --- *INCLUDE fn
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xr11 1111 END *LINE lineno
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KEY:
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r = Reserved bit (must be zero)
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fn = 8-bit file number
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lvl = 8-bit static nexting level
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sop = 17-bit sysio operation
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lineno = 17-bit line number
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nn = 32-bit constant value (signed)
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uu = 32-bit constant value (unsigned)
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fop = 32-bit floating point operation
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lop = 32-bit library call identifier
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ilbl = 32-bit Instruction space label number
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dlbl = 32-stack data label
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offs4 = 32-bit word offset with respect to LSP (signed)
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offs2 = 32-bit halfword offset with respect to LSP (signed)
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offs = 32-bit byte offset with respect to LSP (signed)
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uoffs4 = 32-bit word offset with respect to SPB (unsigned)
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uoffs2 = 32-bit halfword offset with respect to SPB (unsigned)
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uoffs = 32-bit byte offset with respect to SPB (unsigned)
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c = string follows psuedo-operation
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= Indicates pseudo-operations (these are removed
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