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avra: code consolidation

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This commit is contained in:
Virgil Dupras 2019-12-15 20:15:44 -05:00
parent b130cac635
commit 5c43988649
1 changed files with 103 additions and 130 deletions
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233
apps/zasm/avr.asm
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@ -36,53 +36,49 @@ instrNames:
.db "ADC", 0
.db "ADD", 0
.db "AND", 0
.db "ASR", 0
.db "BLD", 0
.db "BST", 0
.db "CLR", 0
.db "CP", 0
.db "CPC", 0
.db "CPSE", 0
.db "EOR", 0
.db "MOV", 0
.db "MUL", 0
.db "OR", 0
.db "SBC", 0
.db "SBRC", 0
.db "SBRS", 0
.db "SUB", 0
.equ I_ANDI 35
.db "ANDI", 0
.db "CPI", 0
.db "LDI", 0
.db "ORI", 0
.db "SBCI", 0
.db "SBR", 0
.db "SUBI", 0
.equ I_RCALL 42
.db "RCALL", 0
.db "RJMP", 0
.equ I_IN 44
.db "IN", 0
.equ I_OUT 45
.db "OUT", 0
; no arg (from here, instrTbl16)
.equ I_BREAK 46
.db "BREAK", 0
.db "BST", 0
.db "CLC", 0
.db "CLH", 0
.db "CLI", 0
.db "CLN", 0
.db "CLR", 0
.db "CLS", 0
.db "CLT", 0
.db "CLV", 0
.db "CLZ", 0
.db "COM", 0
.db "CP", 0
.db "CPC", 0
.db "CPSE", 0
.db "DEC", 0
.db "EICALL", 0
.db "EIJMP", 0
.db "EOR", 0
.db "ICALL", 0
.db "IJMP", 0
.db "IN", 0
.db "INC", 0
.db "LAC", 0
.db "LAS", 0
.db "LAT", 0
.db "LSR", 0
.db "MOV", 0
.db "MUL", 0
.db "NEG", 0
.db "NOP", 0
.db "OR", 0
.db "OUT", 0
.db "POP", 0
.db "PUSH", 0
.db "RET", 0
.db "RETI", 0
.db "ROR", 0
.db "SBC", 0
.db "SBRC", 0
.db "SBRS", 0
.db "SEC", 0
.db "SEH", 0
.db "SEI", 0
@ -92,23 +88,21 @@ instrNames:
.db "SEV", 0
.db "SEZ", 0
.db "SLEEP", 0
.db "WDR", 0
; Rd(5)
.equ I_ASR 72
.db "ASR", 0
.db "COM", 0
.db "DEC", 0
.db "INC", 0
.db "LAC", 0
.db "LAS", 0
.db "LAT", 0
.db "LSR", 0
.db "NEG", 0
.db "POP", 0
.db "PUSH", 0
.db "ROR", 0
.db "SUB", 0
.db "SWAP", 0
.db "WDR", 0
.db "XCH", 0
.equ I_ANDI 77
.db "ANDI", 0
.db "CPI", 0
.db "LDI", 0
.db "ORI", 0
.db "SBCI", 0
.db "SBR", 0
.db "SUBI", 0
.equ I_RCALL 84
.db "RCALL", 0
.db "RJMP", 0
.db 0xff
; Instruction table
@ -133,24 +127,68 @@ instrNames:
; In the same order as in instrNames
instrTbl:
; Rd(5) + Rd(5) (0x02) and Rd(5) + bit (0x05) (same processing)
; Regular processing: Rd with second arg having its 4 low bits placed in C's
; 3:0 bits and the 4 high bits being place in B's 4:1 bits
; No args are also there.
.db 0x02, 0b00011100, 0x00 ; ADC Rd, Rr
.db 0x02, 0b00001100, 0x00 ; ADD Rd, Rr
.db 0x02, 0b00100000, 0x00 ; AND Rd, Rr
.db 0x01, 0b10010100, 0b00000101 ; ASR Rd
.db 0x05, 0b11111000, 0x00 ; BLD Rd, b
.db 0x00, 0b10010101, 0b10011000 ; BREAK
.db 0x05, 0b11111010, 0x00 ; BST Rd, b
.db 0x00, 0b10010100, 0b10001000 ; CLC
.db 0x00, 0b10010100, 0b11011000 ; CLH
.db 0x00, 0b10010100, 0b11111000 ; CLI
.db 0x00, 0b10010100, 0b10101000 ; CLN
.db 0x41, 0b00100100, 0x00 ; CLR Rd (Bit 6)
.db 0x00, 0b10010100, 0b11001000 ; CLS
.db 0x00, 0b10010100, 0b11101000 ; CLT
.db 0x00, 0b10010100, 0b10111000 ; CLV
.db 0x00, 0b10010100, 0b10011000 ; CLZ
.db 0x01, 0b10010100, 0b00000000 ; COM Rd
.db 0x02, 0b00010100, 0x00 ; CP Rd, Rr
.db 0x02, 0b00000100, 0x00 ; CPC Rd, Rr
.db 0x02, 0b00010000, 0x00 ; CPSE Rd, Rr
.db 0x01, 0b10010100, 0b00001010 ; DEC Rd
.db 0x00, 0b10010101, 0b00011001 ; EICALL
.db 0x00, 0b10010100, 0b00011001 ; EIJMP
.db 0x02, 0b00100100, 0x00 ; EOR Rd, Rr
.db 0x00, 0b10010101, 0b00001001 ; ICALL
.db 0x00, 0b10010100, 0b00001001 ; IJMP
.db 0x07, 0b10110000, 0x00 ; IN Rd, A
.db 0x01, 0b10010100, 0b00000011 ; INC Rd
.db 0x01, 0b10010010, 0b00000110 ; LAC Rd
.db 0x01, 0b10010010, 0b00000101 ; LAS Rd
.db 0x01, 0b10010010, 0b00000111 ; LAT Rd
.db 0x01, 0b10010100, 0b00000110 ; LSR Rd
.db 0x00, 0b00000000, 0b00000000 ; NOP
.db 0x02, 0b00101100, 0x00 ; MOV Rd, Rr
.db 0x02, 0b10011100, 0x00 ; MUL Rd, Rr
.db 0x01, 0b10010100, 0b00000001 ; NEG Rd
.db 0x02, 0b00101000, 0x00 ; OR Rd, Rr
.db 0x87, 0b10111000, 0x00 ; OUT A, Rr (Bit 7)
.db 0x01, 0b10010000, 0b00001111 ; POP Rd
.db 0x01, 0b10010010, 0b00001111 ; PUSH Rd
.db 0x00, 0b10010101, 0b00001000 ; RET
.db 0x00, 0b10010101, 0b00011000 ; RETI
.db 0x01, 0b10010100, 0b00000111 ; ROR Rd
.db 0x02, 0b00001000, 0x00 ; SBC Rd, Rr
.db 0x05, 0b11111100, 0x00 ; SBRC Rd, b
.db 0x05, 0b11111110, 0x00 ; SBRS Rd, b
.db 0x00, 0b10010100, 0b00001000 ; SEC
.db 0x00, 0b10010100, 0b01011000 ; SEH
.db 0x00, 0b10010100, 0b01111000 ; SEI
.db 0x00, 0b10010100, 0b00101000 ; SEN
.db 0x00, 0b10010100, 0b01001000 ; SES
.db 0x00, 0b10010100, 0b01101000 ; SET
.db 0x00, 0b10010100, 0b00111000 ; SEV
.db 0x00, 0b10010100, 0b00011000 ; SEZ
.db 0x00, 0b10010101, 0b10001000 ; SLEEP
.db 0x02, 0b00011000, 0x00 ; SUB Rd, Rr
.db 0x01, 0b10010100, 0b00000010 ; SWAP Rd
.db 0x00, 0b10010101, 0b10101000 ; WDR
.db 0x01, 0b10010010, 0b00000100 ; XCH Rd
; Rd(4) + K(8): XXXXKKKK ddddKKKK
.db 0x04, 0b01110000, 0x00 ; ANDI
.db 0x04, 0b00110000, 0x00 ; CPI
@ -162,51 +200,6 @@ instrTbl:
; k(12): XXXXkkkk kkkkkkkk
.db 0x08, 0b11010000, 0x00 ; RCALL k
.db 0x08, 0b11000000, 0x00 ; RJMP k
; IN and OUT
.db 0x07, 0b10110000, 0x00 ; IN
.db 0x87, 0b10111000, 0x00 ; OUT (Bit 7)
; no arg
.db 0x00, 0b10010101, 0b10011000 ; BREAK
.db 0x00, 0b10010100, 0b10001000 ; CLC
.db 0x00, 0b10010100, 0b11011000 ; CLH
.db 0x00, 0b10010100, 0b11111000 ; CLI
.db 0x00, 0b10010100, 0b10101000 ; CLN
.db 0x00, 0b10010100, 0b11001000 ; CLS
.db 0x00, 0b10010100, 0b11101000 ; CLT
.db 0x00, 0b10010100, 0b10111000 ; CLV
.db 0x00, 0b10010100, 0b10011000 ; CLZ
.db 0x00, 0b10010101, 0b00011001 ; EICALL
.db 0x00, 0b10010100, 0b00011001 ; EIJMP
.db 0x00, 0b10010101, 0b00001001 ; ICALL
.db 0x00, 0b10010100, 0b00001001 ; IJMP
.db 0x00, 0b00000000, 0b00000000 ; NOP
.db 0x00, 0b10010101, 0b00001000 ; RET
.db 0x00, 0b10010101, 0b00011000 ; RETI
.db 0x00, 0b10010100, 0b00001000 ; SEC
.db 0x00, 0b10010100, 0b01011000 ; SEH
.db 0x00, 0b10010100, 0b01111000 ; SEI
.db 0x00, 0b10010100, 0b00101000 ; SEN
.db 0x00, 0b10010100, 0b01001000 ; SES
.db 0x00, 0b10010100, 0b01101000 ; SET
.db 0x00, 0b10010100, 0b00111000 ; SEV
.db 0x00, 0b10010100, 0b00011000 ; SEZ
.db 0x00, 0b10010101, 0b10001000 ; SLEEP
.db 0x00, 0b10010101, 0b10101000 ; WDR
; Rd(5): XXXXXXXd ddddXXXX
.db 0x01, 0b10010100, 0b00000101 ; ASR
.db 0x01, 0b10010100, 0b00000000 ; COM
.db 0x01, 0b10010100, 0b00001010 ; DEC
.db 0x01, 0b10010100, 0b00000011 ; INC
.db 0x01, 0b10010010, 0b00000110 ; LAC
.db 0x01, 0b10010010, 0b00000101 ; LAS
.db 0x01, 0b10010010, 0b00000111 ; LAT
.db 0x01, 0b10010100, 0b00000110 ; LSR
.db 0x01, 0b10010100, 0b00000001 ; NEG
.db 0x01, 0b10010000, 0b00001111 ; POP
.db 0x01, 0b10010010, 0b00001111 ; PUSH
.db 0x01, 0b10010100, 0b00000111 ; ROR
.db 0x01, 0b10010100, 0b00000010 ; SWAP
.db 0x01, 0b10010010, 0b00000100 ; XCH
; Same signature as getInstID in instr.asm
; Reads string in (HL) and returns the corresponding ID (I_*) in A. Sets Z if
@ -268,7 +261,7 @@ parseInstruction:
push hl \ pop ix ; IX is now our tblrow
ld hl, 0
or a
jr z, .noarg
jr z, .spit ; No arg? spit right away
and 0xf ; lower nibble
dec a ; argspec index is 1-based
ld hl, argSpecs
@ -283,7 +276,6 @@ parseInstruction:
call nz, .swapHL ; Bit 7 set, swap H and L
call _parseArgs
ret nz
.noarg:
; *** Step 3: place arguments in binary upcode and spit.
; (IX) is table row
; Parse arg values now in H and L
@ -294,21 +286,13 @@ parseInstruction:
call nz, .cpHintoL ; Bit 6 set, copy H into L
ld a, e ; InstrID
cp I_ANDI
jr c, .spitRd5Rr5
jr c, .spitRegular
cp I_RCALL
jr c, .spitRdK8
cp I_IN
jr c, .spitk12
cp I_BREAK
jp c, .spitINOUT
cp I_ASR
jp c, .spit ; no arg
; spitRd5
call .placeRd
jp .spit
.spitRd5Rr5:
; This is used for both Rd(5) + Rr(5) and Rd(5) + bit because the same
; logic works for both cases.
jr .spitk12
.spitRegular:
; Regular process which places H and L, ORring it with upcode. Works
; in most cases.
call .placeRd
call .placeRr
jr .spit
@ -343,21 +327,6 @@ parseInstruction:
ld b, a
jr .spit
.spitINOUT:
; Rd in H, A in L
call .placeRd
ld a, l
and 0xf
or c
; LSB ready
call ioPutB
; The two high bits of A go in bits 3:1 of MSB
ld a, l
rra \ rra \ rra
and 0b110
or b
ld b, a
jr .spitMSB
.spit:
; LSB is spit *before* MSB
ld a, (ix+2)
@ -494,16 +463,18 @@ argSpecs:
; and thus parse their args themselves.
; Z for success.
_parseArgs:
; For the duration of the routine, our final value will be in DE, and
; then placed in HL at the end.
; For the duration of the routine, argspec is in DE and final MSB is
; in BC. We place result in HL at the end.
push de
push bc
ld bc, 0
ex de, hl ; argspecs now in DE
call readWord
jr nz, .end
ld a, d
call .parse
jr nz, .end
ld d, a
ld b, a
ld a, e
or a
jr z, .end ; no arg
@ -515,10 +486,12 @@ _parseArgs:
call .parse
jr nz, .end
; we're done with (HL) now
ld l, a
ld c, a
cp a ; ensure Z
.end:
ld h, d
ld h, b
ld l, c
pop bc
pop de
ret
@ -575,9 +548,9 @@ _readDouble:
push ix
call parseExpr
jr nz, .end
push ix \ pop hl
; HL is already set. For good measure, let's set A to HL's MSB
ld a, h
push ix \ pop bc
; BC is already set. For good measure, let's set A to BC's MSB
ld a, b
.end:
pop ix
ret
@ -603,7 +576,7 @@ _readk7:
inc hl \ inc hl
ex de, hl
sbc hl, de
jp c, .err ; Carry? error
jr c, .err ; Carry? error
ld de, 0x7f
sbc hl, de
; We're within bounds! However, our value in L is the number of