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zasm: add LD r, (IX/Y+d) support

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This commit is contained in:
Virgil Dupras 2019-05-17 23:01:29 -04:00
parent f44c3e5413
commit 650eec23de
2 changed files with 22 additions and 2 deletions
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22
apps/zasm/instr.asm
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@ -2,7 +2,7 @@
; Number of rows in the argspec table
ARGSPEC_TBL_CNT .equ 31
; Number of rows in the primary instructions table
INSTR_TBL_CNT .equ 144
INSTR_TBL_CNT .equ 146
; size in bytes of each row in the primary instructions table
INSTR_TBL_ROWSIZE .equ 6
; Instruction IDs They correspond to the index of the table in instrNames
@ -513,6 +513,22 @@ handleLDIXYr:
ld c, 3
ret
handleLDrIX:
ld a, 0xdd
jr handleLDrIXY
handleLDrIY:
ld a, 0xfd
handleLDrIXY:
ld (instrUpcode), a
ld a, (curArg1+1) ; group value
rla \ rla \ rla
or 0b01000110 ; second upcode
ld (instrUpcode+1), a
ld a, (curArg2+1) ; IXY displacement
ld (instrUpcode+2), a
ld c, 3
ret
handleLDrr:
; first argument is displaced by 3 bits, second argument is not
; displaced and we or that with a leading 0b01000000
@ -1038,7 +1054,7 @@ instrTBl:
.db I_LD, 'l', 'n', 0, 0x36 , 0 ; LD (HL), n
.db I_LD, 0xb, 'n', 3, 0b00000110 , 0 ; LD r, n
.db I_LD, 0xb, 0xb, 0x20 \ .dw handleLDrr ; LD r, r'
.db I_LD, 0x3, 'N', 4, 0b00000001 , 0 ; LD dd, n
.db I_LD, 0x3, 'N', 4, 0b00000001 , 0 ; LD dd, nn
.db I_LD, 'X', 'N', 0, 0xdd, 0x21 ; LD IX, NN
.db I_LD, 'Y', 'N', 0, 0xfd, 0x21 ; LD IY, NN
.db I_LD, 'M', 'A', 0, 0x32 , 0 ; LD (NN), A
@ -1055,6 +1071,8 @@ instrTBl:
.db I_LD, 'y', 'n', 0x20 \ .dw handleLDIYn ; LD (IY+d), n
.db I_LD, 'x', 0xb, 0x20 \ .dw handleLDIXr ; LD (IX+d), r
.db I_LD, 'y', 0xb, 0x20 \ .dw handleLDIYr ; LD (IY+d), r
.db I_LD, 0xb, 'x', 0x20 \ .dw handleLDrIX ; LD r, (IX+d)
.db I_LD, 0xb, 'y', 0x20 \ .dw handleLDrIY ; LD r, (IY+d)
.db I_LDD, 0, 0, 0, 0xed, 0xa8 ; LDD
.db I_LDDR,0, 0, 0, 0xed, 0xb8 ; LDDR
.db I_LDI, 0, 0, 0, 0xed, 0xa0 ; LDI

2
tools/tests/zasm/test1.asm
View File

@ -17,3 +17,5 @@ label2: .dw 0x42
ld ix, 1234
ld iy, 2345
ld (ix+1), l
ld l, (ix+1)
ld hl, 0x100