avra: code consolidation
This commit is contained in:
Virgil Dupras
parent
b130cac635
commit
5c43988649
@ -36,53 +36,49 @@ instrNames:
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.db "ADC", 0
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.db "ADD", 0
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.db "AND", 0
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.db "ASR", 0
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.db "BLD", 0
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.db "BST", 0
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.db "CLR", 0
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.db "CP", 0
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.db "CPC", 0
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.db "CPSE", 0
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.db "EOR", 0
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.db "MOV", 0
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.db "MUL", 0
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.db "OR", 0
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.db "SBC", 0
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.db "SBRC", 0
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.db "SBRS", 0
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.db "SUB", 0
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.equ I_ANDI 35
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.db "ANDI", 0
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.db "CPI", 0
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.db "LDI", 0
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.db "ORI", 0
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.db "SBCI", 0
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.db "SBR", 0
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.db "SUBI", 0
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.equ I_RCALL 42
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.db "RCALL", 0
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.db "RJMP", 0
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.equ I_IN 44
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.db "IN", 0
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.equ I_OUT 45
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.db "OUT", 0
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; no arg (from here, instrTbl16)
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.equ I_BREAK 46
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.db "BREAK", 0
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.db "BST", 0
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.db "CLC", 0
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.db "CLH", 0
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.db "CLI", 0
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.db "CLN", 0
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.db "CLR", 0
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.db "CLS", 0
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.db "CLT", 0
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.db "CLV", 0
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.db "CLZ", 0
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.db "COM", 0
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.db "CP", 0
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.db "CPC", 0
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.db "CPSE", 0
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.db "DEC", 0
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.db "EICALL", 0
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.db "EIJMP", 0
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.db "EOR", 0
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.db "ICALL", 0
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.db "IJMP", 0
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.db "IN", 0
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.db "INC", 0
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.db "LAC", 0
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.db "LAS", 0
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.db "LAT", 0
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.db "LSR", 0
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.db "MOV", 0
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.db "MUL", 0
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.db "NEG", 0
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.db "NOP", 0
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.db "OR", 0
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.db "OUT", 0
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.db "POP", 0
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.db "PUSH", 0
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.db "RET", 0
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.db "RETI", 0
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.db "ROR", 0
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.db "SBC", 0
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.db "SBRC", 0
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.db "SBRS", 0
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.db "SEC", 0
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.db "SEH", 0
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.db "SEI", 0
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@ -92,23 +88,21 @@ instrNames:
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.db "SEV", 0
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.db "SEZ", 0
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.db "SLEEP", 0
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.db "WDR", 0
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; Rd(5)
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.equ I_ASR 72
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.db "ASR", 0
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.db "COM", 0
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.db "DEC", 0
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.db "INC", 0
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.db "LAC", 0
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.db "LAS", 0
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.db "LAT", 0
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.db "LSR", 0
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.db "NEG", 0
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.db "POP", 0
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.db "PUSH", 0
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.db "ROR", 0
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.db "SUB", 0
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.db "SWAP", 0
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.db "WDR", 0
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.db "XCH", 0
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.equ I_ANDI 77
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.db "ANDI", 0
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.db "CPI", 0
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.db "LDI", 0
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.db "ORI", 0
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.db "SBCI", 0
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.db "SBR", 0
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.db "SUBI", 0
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.equ I_RCALL 84
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.db "RCALL", 0
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.db "RJMP", 0
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.db 0xff
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; Instruction table
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@ -133,24 +127,68 @@ instrNames:
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; In the same order as in instrNames
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instrTbl:
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; Rd(5) + Rd(5) (0x02) and Rd(5) + bit (0x05) (same processing)
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; Regular processing: Rd with second arg having its 4 low bits placed in C's
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; 3:0 bits and the 4 high bits being place in B's 4:1 bits
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; No args are also there.
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.db 0x02, 0b00011100, 0x00 ; ADC Rd, Rr
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.db 0x02, 0b00001100, 0x00 ; ADD Rd, Rr
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.db 0x02, 0b00100000, 0x00 ; AND Rd, Rr
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.db 0x01, 0b10010100, 0b00000101 ; ASR Rd
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.db 0x05, 0b11111000, 0x00 ; BLD Rd, b
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.db 0x00, 0b10010101, 0b10011000 ; BREAK
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.db 0x05, 0b11111010, 0x00 ; BST Rd, b
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.db 0x00, 0b10010100, 0b10001000 ; CLC
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.db 0x00, 0b10010100, 0b11011000 ; CLH
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.db 0x00, 0b10010100, 0b11111000 ; CLI
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.db 0x00, 0b10010100, 0b10101000 ; CLN
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.db 0x41, 0b00100100, 0x00 ; CLR Rd (Bit 6)
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.db 0x00, 0b10010100, 0b11001000 ; CLS
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.db 0x00, 0b10010100, 0b11101000 ; CLT
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.db 0x00, 0b10010100, 0b10111000 ; CLV
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.db 0x00, 0b10010100, 0b10011000 ; CLZ
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.db 0x01, 0b10010100, 0b00000000 ; COM Rd
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.db 0x02, 0b00010100, 0x00 ; CP Rd, Rr
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.db 0x02, 0b00000100, 0x00 ; CPC Rd, Rr
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.db 0x02, 0b00010000, 0x00 ; CPSE Rd, Rr
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.db 0x01, 0b10010100, 0b00001010 ; DEC Rd
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.db 0x00, 0b10010101, 0b00011001 ; EICALL
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.db 0x00, 0b10010100, 0b00011001 ; EIJMP
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.db 0x02, 0b00100100, 0x00 ; EOR Rd, Rr
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.db 0x00, 0b10010101, 0b00001001 ; ICALL
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.db 0x00, 0b10010100, 0b00001001 ; IJMP
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.db 0x07, 0b10110000, 0x00 ; IN Rd, A
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.db 0x01, 0b10010100, 0b00000011 ; INC Rd
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.db 0x01, 0b10010010, 0b00000110 ; LAC Rd
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.db 0x01, 0b10010010, 0b00000101 ; LAS Rd
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.db 0x01, 0b10010010, 0b00000111 ; LAT Rd
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.db 0x01, 0b10010100, 0b00000110 ; LSR Rd
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.db 0x00, 0b00000000, 0b00000000 ; NOP
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.db 0x02, 0b00101100, 0x00 ; MOV Rd, Rr
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.db 0x02, 0b10011100, 0x00 ; MUL Rd, Rr
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.db 0x01, 0b10010100, 0b00000001 ; NEG Rd
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.db 0x02, 0b00101000, 0x00 ; OR Rd, Rr
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.db 0x87, 0b10111000, 0x00 ; OUT A, Rr (Bit 7)
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.db 0x01, 0b10010000, 0b00001111 ; POP Rd
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.db 0x01, 0b10010010, 0b00001111 ; PUSH Rd
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.db 0x00, 0b10010101, 0b00001000 ; RET
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.db 0x00, 0b10010101, 0b00011000 ; RETI
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.db 0x01, 0b10010100, 0b00000111 ; ROR Rd
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.db 0x02, 0b00001000, 0x00 ; SBC Rd, Rr
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.db 0x05, 0b11111100, 0x00 ; SBRC Rd, b
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.db 0x05, 0b11111110, 0x00 ; SBRS Rd, b
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.db 0x00, 0b10010100, 0b00001000 ; SEC
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.db 0x00, 0b10010100, 0b01011000 ; SEH
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.db 0x00, 0b10010100, 0b01111000 ; SEI
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.db 0x00, 0b10010100, 0b00101000 ; SEN
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.db 0x00, 0b10010100, 0b01001000 ; SES
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.db 0x00, 0b10010100, 0b01101000 ; SET
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.db 0x00, 0b10010100, 0b00111000 ; SEV
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.db 0x00, 0b10010100, 0b00011000 ; SEZ
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.db 0x00, 0b10010101, 0b10001000 ; SLEEP
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.db 0x02, 0b00011000, 0x00 ; SUB Rd, Rr
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.db 0x01, 0b10010100, 0b00000010 ; SWAP Rd
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.db 0x00, 0b10010101, 0b10101000 ; WDR
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.db 0x01, 0b10010010, 0b00000100 ; XCH Rd
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; Rd(4) + K(8): XXXXKKKK ddddKKKK
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.db 0x04, 0b01110000, 0x00 ; ANDI
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.db 0x04, 0b00110000, 0x00 ; CPI
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@ -162,51 +200,6 @@ instrTbl:
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; k(12): XXXXkkkk kkkkkkkk
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.db 0x08, 0b11010000, 0x00 ; RCALL k
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.db 0x08, 0b11000000, 0x00 ; RJMP k
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; IN and OUT
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.db 0x07, 0b10110000, 0x00 ; IN
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.db 0x87, 0b10111000, 0x00 ; OUT (Bit 7)
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; no arg
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.db 0x00, 0b10010101, 0b10011000 ; BREAK
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.db 0x00, 0b10010100, 0b10001000 ; CLC
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.db 0x00, 0b10010100, 0b11011000 ; CLH
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.db 0x00, 0b10010100, 0b11111000 ; CLI
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.db 0x00, 0b10010100, 0b10101000 ; CLN
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.db 0x00, 0b10010100, 0b11001000 ; CLS
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.db 0x00, 0b10010100, 0b11101000 ; CLT
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.db 0x00, 0b10010100, 0b10111000 ; CLV
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.db 0x00, 0b10010100, 0b10011000 ; CLZ
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.db 0x00, 0b10010101, 0b00011001 ; EICALL
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.db 0x00, 0b10010100, 0b00011001 ; EIJMP
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.db 0x00, 0b10010101, 0b00001001 ; ICALL
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.db 0x00, 0b10010100, 0b00001001 ; IJMP
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.db 0x00, 0b00000000, 0b00000000 ; NOP
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.db 0x00, 0b10010101, 0b00001000 ; RET
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.db 0x00, 0b10010101, 0b00011000 ; RETI
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.db 0x00, 0b10010100, 0b00001000 ; SEC
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.db 0x00, 0b10010100, 0b01011000 ; SEH
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.db 0x00, 0b10010100, 0b01111000 ; SEI
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.db 0x00, 0b10010100, 0b00101000 ; SEN
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.db 0x00, 0b10010100, 0b01001000 ; SES
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.db 0x00, 0b10010100, 0b01101000 ; SET
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.db 0x00, 0b10010100, 0b00111000 ; SEV
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.db 0x00, 0b10010100, 0b00011000 ; SEZ
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.db 0x00, 0b10010101, 0b10001000 ; SLEEP
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.db 0x00, 0b10010101, 0b10101000 ; WDR
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; Rd(5): XXXXXXXd ddddXXXX
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.db 0x01, 0b10010100, 0b00000101 ; ASR
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.db 0x01, 0b10010100, 0b00000000 ; COM
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.db 0x01, 0b10010100, 0b00001010 ; DEC
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.db 0x01, 0b10010100, 0b00000011 ; INC
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.db 0x01, 0b10010010, 0b00000110 ; LAC
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.db 0x01, 0b10010010, 0b00000101 ; LAS
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.db 0x01, 0b10010010, 0b00000111 ; LAT
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.db 0x01, 0b10010100, 0b00000110 ; LSR
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.db 0x01, 0b10010100, 0b00000001 ; NEG
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.db 0x01, 0b10010000, 0b00001111 ; POP
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.db 0x01, 0b10010010, 0b00001111 ; PUSH
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.db 0x01, 0b10010100, 0b00000111 ; ROR
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.db 0x01, 0b10010100, 0b00000010 ; SWAP
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.db 0x01, 0b10010010, 0b00000100 ; XCH
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; Same signature as getInstID in instr.asm
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; Reads string in (HL) and returns the corresponding ID (I_*) in A. Sets Z if
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@ -268,7 +261,7 @@ parseInstruction:
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push hl \ pop ix ; IX is now our tblrow
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ld hl, 0
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or a
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jr z, .noarg
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jr z, .spit ; No arg? spit right away
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and 0xf ; lower nibble
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dec a ; argspec index is 1-based
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ld hl, argSpecs
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@ -283,7 +276,6 @@ parseInstruction:
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call nz, .swapHL ; Bit 7 set, swap H and L
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call _parseArgs
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ret nz
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.noarg:
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; *** Step 3: place arguments in binary upcode and spit.
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; (IX) is table row
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; Parse arg values now in H and L
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@ -294,21 +286,13 @@ parseInstruction:
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call nz, .cpHintoL ; Bit 6 set, copy H into L
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ld a, e ; InstrID
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cp I_ANDI
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jr c, .spitRd5Rr5
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jr c, .spitRegular
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cp I_RCALL
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jr c, .spitRdK8
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cp I_IN
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jr c, .spitk12
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cp I_BREAK
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jp c, .spitINOUT
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cp I_ASR
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jp c, .spit ; no arg
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; spitRd5
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call .placeRd
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jp .spit
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.spitRd5Rr5:
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; This is used for both Rd(5) + Rr(5) and Rd(5) + bit because the same
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; logic works for both cases.
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jr .spitk12
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.spitRegular:
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; Regular process which places H and L, ORring it with upcode. Works
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; in most cases.
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call .placeRd
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call .placeRr
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jr .spit
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@ -343,21 +327,6 @@ parseInstruction:
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ld b, a
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jr .spit
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.spitINOUT:
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; Rd in H, A in L
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call .placeRd
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ld a, l
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and 0xf
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or c
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; LSB ready
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call ioPutB
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; The two high bits of A go in bits 3:1 of MSB
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ld a, l
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rra \ rra \ rra
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and 0b110
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or b
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ld b, a
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jr .spitMSB
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.spit:
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; LSB is spit *before* MSB
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ld a, (ix+2)
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@ -494,16 +463,18 @@ argSpecs:
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; and thus parse their args themselves.
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; Z for success.
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_parseArgs:
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; For the duration of the routine, our final value will be in DE, and
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; then placed in HL at the end.
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; For the duration of the routine, argspec is in DE and final MSB is
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; in BC. We place result in HL at the end.
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push de
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push bc
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ld bc, 0
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ex de, hl ; argspecs now in DE
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call readWord
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jr nz, .end
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ld a, d
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call .parse
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jr nz, .end
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ld d, a
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ld b, a
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ld a, e
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or a
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jr z, .end ; no arg
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@ -515,10 +486,12 @@ _parseArgs:
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call .parse
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jr nz, .end
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; we're done with (HL) now
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ld l, a
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ld c, a
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cp a ; ensure Z
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.end:
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ld h, d
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ld h, b
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ld l, c
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pop bc
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pop de
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ret
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@ -575,9 +548,9 @@ _readDouble:
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push ix
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call parseExpr
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jr nz, .end
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push ix \ pop hl
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; HL is already set. For good measure, let's set A to HL's MSB
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ld a, h
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push ix \ pop bc
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; BC is already set. For good measure, let's set A to BC's MSB
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ld a, b
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.end:
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pop ix
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ret
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@ -603,7 +576,7 @@ _readk7:
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inc hl \ inc hl
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ex de, hl
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sbc hl, de
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jp c, .err ; Carry? error
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jr c, .err ; Carry? error
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ld de, 0x7f
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sbc hl, de
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; We're within bounds! However, our value in L is the number of
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