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zasm: add a bunch of instructions

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This commit is contained in:
Virgil Dupras 2019-04-17 16:48:29 -04:00
parent 76caf944dd
commit 8ce528c752
1 changed files with 25 additions and 12 deletions
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37
apps/zasm/zasm.asm
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@ -4,7 +4,7 @@
; Number of rows in the argspec table
ARGSPEC_TBL_CNT .equ 27
; Number of rows in the primary instructions table
INSTR_TBLP_CNT .equ 64
INSTR_TBLP_CNT .equ 74
; size in bytes of each row in the primary instructions table
INSTR_TBLP_ROWSIZE .equ 8
@ -167,11 +167,12 @@ isSepOrLineEnd:
call isLineEnd
ret
; read word in (HL) and put it in (DE), null terminated. A is the read
; length. HL is advanced to the next separator char.
; read word in (HL) and put it in (DE), null terminated, for a maximum of A
; characters. As a result, A is the read length. HL is advanced to the next
; separator char.
readWord:
push bc
ld b, 4
ld b, a
.loop:
ld a, (hl)
call isSepOrLineEnd
@ -222,6 +223,7 @@ toWord:
readArg:
push de
ld de, tmpBuf
ld a, 6
call readWord
push hl
ld hl, tmpBuf
@ -250,6 +252,7 @@ readLine:
ld (curArg1), a
ld (curArg2), a
ld de, curWord
ld a, 4
call readWord
call toWord
jr nz, .end
@ -426,15 +429,15 @@ matchArg:
ret z
; not an exact match, let's check for numerical constants.
call JUMP_UPCASE
cp 'N'
jr z, .expectsNumber
cp 'M'
call checkNOrM
jr z, .expectsNumber
jr .notNumber
.expectsNumber:
ld a, (hl)
call checkNOrM ; In parsed arg, we don't have 'n' or 'm', only
; 'N' and 'M'
; Our argument is a number N or M. Never a lower-case version. At this
; point in the processing, we don't care about whether N or M is upper,
; we do truncation tests later. So, let's just perform the same == test
; but in a case-insensitive way instead
cp a, (hl)
ret ; whether we match or not, the result of Z is
; the good one.
.notNumber:
@ -702,16 +705,22 @@ argGrpABCDEHL:
; decreased by 2 (djnz, jr).
instrTBlPrimary:
.db "ADC", 0, 'A', 'h', 0, 0x8e ; ADC A, HL
.db "ADC", 0, 'A', 0xb, 0, 0b10001000 ; ADC A, r
.db "ADC", 0, 'A', 'n', 0, 0xce ; ADC A, n
.db "ADD", 0, 'A', 'h', 0, 0x86 ; ADD A, HL
.db "ADD", 0, 'A', 0xb, 0, 0b10000000 ; ADD A, r
.db "ADD", 0, 'A', 'n', 0, 0xc6 ; ADD A, n
.db "ADC", 0, 'A', 'h', 0, 0x8e ; ADC A, HL
.db "ADC", 0, 'A', 0xb, 0, 0b10001000 ; ADC A, r
.db "ADD", 0, 'h', 0x3, 4, 0b00001001 ; ADD HL, ss
.db "AND", 0, 'l', 0, 0, 0xa6 ; AND (HL)
.db "AND", 0, 0xa, 0, 0, 0b10100000 ; AND r
.db "AND", 0, 'n', 0, 0, 0xe6 ; AND n
.db "CALL", 0xa, 'N', 3, 0b11000100 ; CALL cc, NN
.db "CALL", 'N', 0, 0, 0xcd ; CALL NN
.db "CCF", 0, 0, 0, 0, 0x3f ; CCF
.db "CP",0,0, 'l', 0, 0, 0xbe ; CP (HL)
.db "CP",0,0, 0xb, 0, 0, 0b10111000 ; CP r
.db "CP",0,0, 'n', 0, 0, 0xfe ; CP n
.db "CPL", 0, 0, 0, 0, 0x2f ; CPL
.db "DAA", 0, 0, 0, 0, 0x27 ; DAA
.db "DI",0,0, 0, 0, 0, 0xf3 ; DI
@ -746,6 +755,10 @@ instrTBlPrimary:
.db "LD",0,0, 'l', 'n', 0, 0x36 ; LD (HL), n
.db "LD",0,0, 0xb, 'n', 3, 0b00000110 ; LD r, (HL)
.db "LD",0,0, 0x3, 'N', 4, 0b00000001 ; LD dd, n
.db "LD",0,0, 'M', 'A', 0, 0x32 ; LD (NN), A
.db "LD",0,0, 'A', 'M', 0, 0x3a ; LD A, (NN)
.db "LD",0,0, 'M', 'h', 0, 0x22 ; LD (NN), HL
.db "LD",0,0, 'h', 'M', 0, 0x2a ; LD HL, (NN)
.db "NOP", 0, 0, 0, 0, 0x00 ; NOP
.db "OR",0,0, 'l', 0, 0, 0xb6 ; OR (HL)
.db "OR",0,0, 0xb, 0, 0, 0b10110000 ; OR r