mirror of
https://github.com/A2osX/A2osX.git
synced 2024-11-03 12:06:05 +00:00
280 lines
5.2 KiB
Plaintext
280 lines
5.2 KiB
Plaintext
PR#3
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PREFIX /A2OSX.SRC
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NEW
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INC 1
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AUTO 6
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.LIST OFF
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*---------------------------------------
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* U-Operators :
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* B-Operators :
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* Num Format : 0-9 -> decimal
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* $ = Hex
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* % = binary
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* & = octal
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* * = PC
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*---------------------------------------
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EXP.Eval stz EXP.Operator
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stz EXP.Modifier
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jsr SRC.GetCharNB
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beq EXP.Eval.Missing
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jsr SRC.IsMODReserved
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bcs EXP.Eval.Next1
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stx EXP.Modifier
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bra EXP.Eval.Next
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EXP.Eval.Missing lda #ERR.MISSING.EXP
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sec
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rts
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EXP.Eval.Next jsr SRC.GetCharUC
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beq EXP.Eval.Missing
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EXP.Eval.Next1 cmp #'.' Local Label?
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bne .12
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jsr EXP.GetLocal
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bcs .14
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jmp EXP.EvalOperator
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.14 rts
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.12 cmp #'*'
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bne .10
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ldy #ASM.PC+3
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ldx #3
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.11 lda (pData),y
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sta SRC.ACC,x
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dey
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dex
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bpl .11
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jmp EXP.EvalOperator
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.10 jsr SRC.IsDigit10 Decimal constant ?
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bcs .1
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dec SRC.BufPtr
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jsr SRC.GetDecimal
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bcs EXP.EvalExitSYN
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bra EXP.EvalOperator
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.1 cmp #'$' Hex?
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bne .2
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jsr SRC.GetHex
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bcs EXP.EvalExitSYN
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bra EXP.EvalOperator
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.2 cmp #'%' binary?
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bne .3
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jsr SRC.GetBinary
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bcs EXP.EvalExitSYN
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bra EXP.EvalOperator
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.3 cmp #'&' octal?
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bne .4
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jsr SRC.GetOctal
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bcs EXP.EvalExitSYN
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bra EXP.EvalOperator
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.4 cmp #'''
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bne .43
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jsr SRC.GetChar
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beq EXP.EvalExitSYN
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jsr EXP.SetAccA
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jsr SRC.GetChar
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beq EXP.EvalOperator
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cmp #'''
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bne EXP.EvalExitSYN
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bra EXP.EvalOperator
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.43 cmp '"'
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bne .42
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jsr SRC.GetChar
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beq EXP.EvalExitSYN
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ora #$80
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jsr EXP.SetAccA
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jsr SRC.GetChar
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beq EXP.EvalOperator
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cmp #'"'
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bne EXP.EvalExitSYN
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bra EXP.EvalOperator
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.42 jsr SRC.IsLetter Symbol ?
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bcs EXP.EvalExitSYN
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dec SRC.BufPtr
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jsr EXP.GetSymbol
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bcs EXP.EvalExitRTS
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bra EXP.EvalOperator
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EXP.EvalExitOK dec SRC.BufPtr Back One Char
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EXP.EvalExitOK1 clc
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EXP.EvalExitRTS rts
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EXP.EvalExitSYN lda #ERR.SYNTAX.ERROR
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sec
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rts
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EXP.EvalExitUND lda #ERR.UNDEF.SYMBOL
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sec
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rts
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EXP.EvalOperator lda EXP.Operator
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beq .7
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jsr EXP.Compute
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bcs EXP.EvalExitRTS
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.7 jsr SRC.GetChar
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beq EXP.EvalExitOK1
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cmp #' '
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beq EXP.EvalExitOK
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jsr SRC.IsAMReserved
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bcc EXP.EvalExitOK
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jsr SRC.IsEXPReserved
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bcs EXP.EvalExitSYN
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stx EXP.Operator
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ldx #3
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.8 lda SRC.ACC,x
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sta SRC.ARG,x
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dex
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bpl .8
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jmp EXP.Eval.Next
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*---------------------------------------
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EXP.GetLocal jsr SRC.GetDecimal
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bcs EXP.EvalExitSYN
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lda SRC.ACC+1
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ora SRC.ACC+2
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ora SRC.ACC+3
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bne EXP.EvalExitSYN Max .255
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lda SRC.ACC
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beq EXP.EvalExitSYN .0 is not allowed
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jsr SYM.SearchLocal
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bcs EXP.EvalExitUND
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rts
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*---------------------------------------
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EXP.SetAccA sta SRC.ACC
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stz SRC.ACC+1
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stz SRC.ACC+2
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stz SRC.ACC+3
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rts
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*---------------------------------------
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EXP.GetSymbol >LDYA L.SRC.ELabel.Len
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jsr SRC.GetLabel
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bcs EXP.EvalExitSYN
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>LDYA L.SRC.ELabel.Flags
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jsr SYM.SearchGlobal
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bcc .1
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ldy #ASM.PASS
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lda (pData),y pass#2?
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bne EXP.EvalExitUND yes, undefined symbol
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lda #$C0 Valid+Pending
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sta SRC.ELabel.Flags
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>LDYA L.SRC.ELabel.Flags
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jsr SYM.AddGToGBlockYA
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rts
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.1 ldx #3
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.2 lda SRC.FLabel.Value,x
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sta SRC.ACC,x
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dex
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bpl .2
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clc
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rts
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*---------------------------------------
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EXP.Compute dec
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asl
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tax
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* ldy #ASM.PASS
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* lda (pData),y pass#2?
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* beq .8
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jmp (J.EXP.OP,x)
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.8 clc
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rts
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*---------------------------------------
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EXP.Compute.EOR
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*---------------------------------------
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EXP.Compute.ORA
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*---------------------------------------
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EXP.Compute.AND
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*---------------------------------------
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EXP.Compute.LOW
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*---------------------------------------
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EXP.Compute.EQU
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*---------------------------------------
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EXP.Compute.GRT
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clc
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rts
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*---------------------------------------
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EXP.Compute.ADD ldx #0 ARG-ACC->ACC
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ldy #4
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clc
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.1 lda SRC.ARG,x
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adc SRC.ACC,x
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sta SRC.ACC,x
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inx
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dey
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bne .1
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bcc .8
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lda #ERR.VAL.TOO.BIG
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.8 rts
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*---------------------------------------
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EXP.Compute.SUB ldx #0 ARG-ACC->ACC
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ldy #4
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sec
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.1 lda SRC.ARG,x
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sbc SRC.ACC,x
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sta SRC.ACC,x
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inx
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dey
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bne .1
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bcs .8
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lda #ERR.VAL.TOO.BIG
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sec
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rts
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.8 clc
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rts
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*---------------------------------------
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EXP.Compute.MUL
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*---------------------------------------
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EXP.Compute.DIV
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clc
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rts
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*---------------------------------------
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MAN
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SAVE BIN/ASM.S.EXP
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LOAD BIN/ASM.S
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ASM
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