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improved number-to-decimal routines
This commit is contained in:
Irmen de Jong
parent
b5b24636ae
commit
f6d4c90dea
@ -7,7 +7,6 @@
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<module fileurl="file://$PROJECT_DIR$/docs/docs.iml" filepath="$PROJECT_DIR$/docs/docs.iml" />
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<module fileurl="file://$PROJECT_DIR$/examples/examples.iml" filepath="$PROJECT_DIR$/examples/examples.iml" />
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<module fileurl="file://$PROJECT_DIR$/parser/parser.iml" filepath="$PROJECT_DIR$/parser/parser.iml" />
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<module fileurl="file://$PROJECT_DIR$/sim65/sim65.iml" filepath="$PROJECT_DIR$/sim65/sim65.iml" />
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</modules>
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</component>
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</project>
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</project>
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@ -15,28 +15,199 @@ c64utils {
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const uword ESTACK_HI = $cf00
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; ----- utility functions ----
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; ----- number conversions to decimal strings
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asmsub ubyte2decimal (ubyte value @ A) -> ubyte @ Y, ubyte @ X, ubyte @ A {
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; ---- A to decimal string in Y/X/A (100s in Y, 10s in X, 1s in A)
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%asm {{
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ldy #$2f
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ldx #$3a
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sec
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- iny
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sbc #100
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bcs -
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- dex
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adc #10
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bmi -
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adc #$2f
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rts
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asmsub ubyte2decimal (ubyte value @ A) -> ubyte @ Y, ubyte @ A, ubyte @ X {
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; ---- A to decimal string in Y/A/X (100s in Y, 10s in A, 1s in X)
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%asm {{
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ldy #uword2decimal.ASCII_0_OFFSET
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bne uword2decimal.hex_try200
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rts
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}}
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}
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asmsub byte2decimal (ubyte value @ A) -> ubyte @ Y, ubyte @ X, ubyte @ A {
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; ---- A (signed byte) to decimal string in Y/X/A (100s in Y, 10s in X, 1s in A)
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; note: the '-' is not part of the conversion here if it's a negative number
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asmsub uword2decimal (uword value @ AY) -> ubyte @Y, ubyte @A, ubyte @X {
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; ---- convert 16 bit uword in A/Y to decimal
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; output in uword2decimal.decTenThousands, decThousands, decHundreds, decTens, decOnes
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; (these are terminated by a zero byte so they can be easily printed)
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; also returns Y = 100's, A = 10's, X = 1's
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%asm {{
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;Convert 16 bit Hex to Decimal (0-65535) Rev 2
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;By Omegamatrix Further optimizations by tepples
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; routine from http://forums.nesdev.com/viewtopic.php?f=2&t=11341&start=15
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;HexToDec99
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; start in A
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; end with A = 10's, decOnes (also in X)
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;HexToDec255
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; start in A
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; end with Y = 100's, A = 10's, decOnes (also in X)
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;HexToDec999
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; start with A = high byte, Y = low byte
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; end with Y = 100's, A = 10's, decOnes (also in X)
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; requires 1 extra temp register on top of decOnes, could combine
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; these two if HexToDec65535 was eliminated...
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;HexToDec65535
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; start with A/Y (low/high) as 16 bit value
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; end with decTenThousand, decThousand, Y = 100's, A = 10's, decOnes (also in X)
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; (irmen: I store Y and A in decHundreds and decTens too, so all of it can be easily printed)
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ASCII_0_OFFSET = $30
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temp = c64.SCRATCH_ZPB1 ; byte in zeropage
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hexHigh = c64.SCRATCH_ZPWORD1 ; byte in zeropage
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hexLow = c64.SCRATCH_ZPWORD1+1 ; byte in zeropage
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HexToDec65535; SUBROUTINE
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sty hexHigh ;3 @9
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sta hexLow ;3 @12
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tya
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tax ;2 @14
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lsr a ;2 @16
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lsr a ;2 @18 integer divide 1024 (result 0-63)
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cpx #$A7 ;2 @20 account for overflow of multiplying 24 from 43,000 ($A7F8) onward,
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adc #1 ;2 @22 we can just round it to $A700, and the divide by 1024 is fine...
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;at this point we have a number 1-65 that we have to times by 24,
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;add to original sum, and Mod 1024 to get a remainder 0-999
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sta temp ;3 @25
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asl a ;2 @27
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adc temp ;3 @30 x3
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tay ;2 @32
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lsr a ;2 @34
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lsr a ;2 @36
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lsr a ;2 @38
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lsr a ;2 @40
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lsr a ;2 @42
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tax ;2 @44
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tya ;2 @46
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asl a ;2 @48
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asl a ;2 @50
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asl a ;2 @52
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clc ;2 @54
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adc hexLow ;3 @57
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sta hexLow ;3 @60
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txa ;2 @62
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adc hexHigh ;3 @65
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sta hexHigh ;3 @68
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ror a ;2 @70
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lsr a ;2 @72
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tay ;2 @74 integer divide 1,000 (result 0-65)
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lsr a ;2 @76 split the 1,000 and 10,000 digit
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tax ;2 @78
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lda ShiftedBcdTab,x ;4 @82
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tax ;2 @84
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rol a ;2 @86
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and #$0F ;2 @88
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ora #ASCII_0_OFFSET
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sta decThousands ;3 @91
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txa ;2 @93
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lsr a ;2 @95
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lsr a ;2 @97
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lsr a ;2 @99
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ora #ASCII_0_OFFSET
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sta decTenThousands ;3 @102
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lda hexLow ;3 @105
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cpy temp ;3 @108
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bmi _doSubtract ;2³ @110/111
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beq _useZero ;2³ @112/113
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adc #23 + 24 ;2 @114
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_doSubtract
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sbc #23 ;2 @116
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sta hexLow ;3 @119
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_useZero
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lda hexHigh ;3 @122
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sbc #0 ;2 @124
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Start100s
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and #$03 ;2 @126
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tax ;2 @128 0,1,2,3
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cmp #2 ;2 @130
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rol a ;2 @132 0,2,5,7
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ora #ASCII_0_OFFSET
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tay ;2 @134 Y = Hundreds digit
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lda hexLow ;3 @137
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adc Mod100Tab,x ;4 @141 adding remainder of 256, 512, and 256+512 (all mod 100)
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bcs hex_doSub200 ;2³ @143/144
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hex_try200
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cmp #200 ;2 @145
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bcc hex_try100 ;2³ @147/148
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hex_doSub200
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iny ;2 @149
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iny ;2 @151
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sbc #200 ;2 @153
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hex_try100
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cmp #100 ;2 @155
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bcc HexToDec99 ;2³ @157/158
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iny ;2 @159
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sbc #100 ;2 @161
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HexToDec99; SUBROUTINE
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lsr a ;2 @163
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tax ;2 @165
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lda ShiftedBcdTab,x ;4 @169
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tax ;2 @171
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rol a ;2 @173
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and #$0F ;2 @175
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ora #ASCII_0_OFFSET
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sta decOnes ;3 @178
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txa ;2 @180
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lsr a ;2 @182
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lsr a ;2 @184
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lsr a ;2 @186
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ora #ASCII_0_OFFSET
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; irmen: load X with ones, and store Y and A too, for easy printing afterwards
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sty decHundreds
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sta decTens
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ldx decOnes
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rts ;6 @192 Y=hundreds, A = tens digit, X=ones digit
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HexToDec999; SUBROUTINE
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sty hexLow ;3 @9
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jmp Start100s ;3 @12
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Mod100Tab
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.byte 0,56,12,56+12
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ShiftedBcdTab
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.byte $00,$01,$02,$03,$04,$08,$09,$0A,$0B,$0C
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.byte $10,$11,$12,$13,$14,$18,$19,$1A,$1B,$1C
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.byte $20,$21,$22,$23,$24,$28,$29,$2A,$2B,$2C
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.byte $30,$31,$32,$33,$34,$38,$39,$3A,$3B,$3C
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.byte $40,$41,$42,$43,$44,$48,$49,$4A,$4B,$4C
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decTenThousands .byte 0
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decThousands .byte 0
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decHundreds .byte 0
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decTens .byte 0
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decOnes .byte 0
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.byte 0 ; zero-terminate the decimal output string
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}}
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}
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; ----- utility functions ----
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asmsub byte2decimal (byte value @ A) -> ubyte @ Y, ubyte @ A, ubyte @ X {
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; ---- A (signed byte) to decimal string in Y/A/X (100s in Y, 10s in A, 1s in X)
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; note: if the number is negative, you have to deal with the '-' yourself!
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%asm {{
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cmp #0
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bpl +
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@ -48,7 +219,7 @@ asmsub byte2decimal (ubyte value @ A) -> ubyte @ Y, ubyte @ X, ubyte @ A {
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}
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asmsub ubyte2hex (ubyte value @ A) -> ubyte @ A, ubyte @ Y {
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; ---- A to hex string in AY (first hex char in A, second hex char in Y)
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; ---- A to hex petscii string in AY (first hex char in A, second hex char in Y)
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%asm {{
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stx c64.SCRATCH_ZPREGX
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pha
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@ -69,7 +240,6 @@ _hex_digits .text "0123456789abcdef" ; can probably be reused for other stuff as
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}}
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}
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asmsub uword2hex (uword value @ AY) clobbers(A,Y) {
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; ---- convert 16 bit uword in A/Y into 4-character hexadecimal string 'uword2hex.output' (0-terminated)
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%asm {{
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@ -87,91 +257,6 @@ output .text "0000", $00 ; 0-terminated output buffer (to make printing ea
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}}
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}
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asmsub uword2bcd (uword value @ AY) clobbers(A,Y) {
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; Convert an 16 bit binary value to BCD
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;
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; This function converts a 16 bit binary value in A/Y into a 24 bit BCD. It
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; works by transferring one bit a time from the source and adding it
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; into a BCD value that is being doubled on each iteration. As all the
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; arithmetic is being done in BCD the result is a binary to decimal
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; conversion.
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%asm {{
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sta c64.SCRATCH_ZPB1
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sty c64.SCRATCH_ZPREG
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php
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pla ; read status register
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and #%00000100
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sta _had_irqd
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sed ; switch to decimal mode
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lda #0 ; ensure the result is clear
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sta bcdbuff+0
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sta bcdbuff+1
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sta bcdbuff+2
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ldy #16 ; the number of source bits
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- asl c64.SCRATCH_ZPB1 ; shift out one bit
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rol c64.SCRATCH_ZPREG
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lda bcdbuff+0 ; and add into result
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adc bcdbuff+0
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sta bcdbuff+0
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lda bcdbuff+1 ; propagating any carry
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adc bcdbuff+1
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sta bcdbuff+1
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lda bcdbuff+2 ; ... thru whole result
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adc bcdbuff+2
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sta bcdbuff+2
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dey ; and repeat for next bit
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bne -
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cld ; back to binary
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lda _had_irqd
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bne +
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cli ; enable interrupts again (only if they were enabled before)
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+ rts
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_had_irqd .byte 0
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bcdbuff .byte 0,0,0
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}}
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}
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asmsub uword2decimal (uword value @ AY) clobbers(A) -> ubyte @ Y {
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; ---- convert 16 bit uword in A/Y into 0-terminated decimal string into memory 'uword2decimal.output'
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; returns length of resulting string in Y
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%asm {{
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jsr uword2bcd
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lda uword2bcd.bcdbuff+2
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clc
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adc #'0'
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sta output
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ldy #1
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lda uword2bcd.bcdbuff+1
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jsr +
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lda uword2bcd.bcdbuff+0
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+ pha
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lsr a
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lsr a
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lsr a
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lsr a
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clc
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adc #'0'
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sta output,y
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iny
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pla
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and #$0f
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adc #'0'
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sta output,y
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iny
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lda #0
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sta output,y
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rts
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output .text "00000", $00 ; 0 terminated
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}}
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}
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asmsub str2uword(str string @ AY) -> uword @ AY {
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; -- returns the unsigned word value of the string number argument in AY
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; the number may NOT be preceded by a + sign and may NOT contain spaces
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@ -226,7 +311,6 @@ _result_times_10 ; (W*4 + W)*2
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}}
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}
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asmsub str2word(str string @ AY) -> word @ AY {
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; -- returns the signed word value of the string number argument in AY
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; the number may be preceded by a + or - sign but may NOT contain spaces
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@ -282,7 +366,6 @@ _negative .byte 0
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}}
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}
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asmsub set_irqvec_excl() clobbers(A) {
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%asm {{
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sei
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@ -372,7 +455,6 @@ IRQ_SCRATCH_ZPWORD2 .word 0
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}}
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}
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asmsub restore_irqvec() {
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%asm {{
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sei
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@ -389,7 +471,6 @@ asmsub restore_irqvec() {
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}}
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}
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asmsub set_rasterirq(uword rasterpos @ AY) clobbers(A) {
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%asm {{
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sei
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@ -454,13 +535,11 @@ _raster_irq_handler
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}
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} ; ------ end of block c64utils
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c64scr {
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; ---- this block contains (character) Screen and text I/O related functions ----
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@ -480,7 +559,6 @@ asmsub clear_screen (ubyte char @ A, ubyte color @ Y) clobbers(A) {
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}
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asmsub clear_screenchars (ubyte char @ A) clobbers(Y) {
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; ---- clear the character screen with the given fill character (leaves colors)
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; (assumes screen matrix is at the default address)
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@ -521,7 +599,6 @@ _loop sta c64.Colors,y
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}}
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}
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asmsub scroll_left_full (ubyte alsocolors @ Pc) clobbers(A, Y) {
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; ---- scroll the whole screen 1 character to the left
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; contents of the rightmost column are unchanged, you should clear/refill this yourself
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@ -582,7 +659,6 @@ _scroll_screen ; scroll the screen memory
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}}
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}
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asmsub scroll_right_full (ubyte alsocolors @ Pc) clobbers(A) {
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; ---- scroll the whole screen 1 character to the right
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; contents of the leftmost column are unchanged, you should clear/refill this yourself
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@ -635,7 +711,6 @@ _scroll_screen ; scroll the screen memory
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}}
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}
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asmsub scroll_up_full (ubyte alsocolors @ Pc) clobbers(A) {
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; ---- scroll the whole screen 1 character up
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; contents of the bottom row are unchanged, you should refill/clear this yourself
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@ -688,7 +763,6 @@ _scroll_screen ; scroll the screen memory
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}}
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}
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asmsub scroll_down_full (ubyte alsocolors @ Pc) clobbers(A) {
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; ---- scroll the whole screen 1 character down
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; contents of the top row are unchanged, you should refill/clear this yourself
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@ -742,7 +816,6 @@ _scroll_screen ; scroll the screen memory
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}
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asmsub print (str text @ AY) clobbers(A,Y) {
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; ---- print null terminated string from A/Y
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; note: the compiler contains an optimization that will replace
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@ -761,7 +834,6 @@ asmsub print (str text @ AY) clobbers(A,Y) {
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}}
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}
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asmsub print_ub0 (ubyte value @ A) clobbers(A,Y) {
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; ---- print the ubyte in A in decimal form, with left padding 0s (3 positions total)
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%asm {{
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@ -770,16 +842,15 @@ asmsub print_ub0 (ubyte value @ A) clobbers(A,Y) {
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pha
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tya
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jsr c64.CHROUT
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txa
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jsr c64.CHROUT
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pla
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jsr c64.CHROUT
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txa
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jsr c64.CHROUT
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ldx c64.SCRATCH_ZPREGX
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rts
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}}
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}
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asmsub print_ub (ubyte value @ A) clobbers(A,Y) {
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; ---- print the ubyte in A in decimal form, without left padding 0s
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%asm {{
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@ -788,15 +859,14 @@ asmsub print_ub (ubyte value @ A) clobbers(A,Y) {
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_print_byte_digits
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pha
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cpy #'0'
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bne _print_hundreds
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cpx #'0'
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bne _print_tens
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jmp _end
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_print_hundreds tya
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beq +
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tya
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jsr c64.CHROUT
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_print_tens txa
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jsr c64.CHROUT
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||||
_end pla
|
||||
+ pla
|
||||
cmp #'0'
|
||||
beq +
|
||||
jsr c64.CHROUT
|
||||
+ txa
|
||||
jsr c64.CHROUT
|
||||
ldx c64.SCRATCH_ZPREGX
|
||||
rts
|
||||
@ -820,7 +890,6 @@ asmsub print_b (byte value @ A) clobbers(A,Y) {
|
||||
}}
|
||||
}
|
||||
|
||||
|
||||
asmsub print_ubhex (ubyte value @ A, ubyte prefix @ Pc) clobbers(A,Y) {
|
||||
; ---- print the ubyte in A in hex form (if Carry is set, a radix prefix '$' is printed as well)
|
||||
%asm {{
|
||||
@ -839,7 +908,6 @@ asmsub print_ubhex (ubyte value @ A, ubyte prefix @ Pc) clobbers(A,Y) {
|
||||
}}
|
||||
}
|
||||
|
||||
|
||||
asmsub print_ubbin (ubyte value @ A, ubyte prefix @ Pc) clobbers(A,Y) {
|
||||
; ---- print the ubyte in A in binary form (if Carry is set, a radix prefix '%' is printed as well)
|
||||
%asm {{
|
||||
@ -861,7 +929,6 @@ asmsub print_ubbin (ubyte value @ A, ubyte prefix @ Pc) clobbers(A,Y) {
|
||||
}}
|
||||
}
|
||||
|
||||
|
||||
asmsub print_uwbin (uword value @ AY, ubyte prefix @ Pc) clobbers(A,Y) {
|
||||
; ---- print the uword in A/Y in binary form (if Carry is set, a radix prefix '%' is printed as well)
|
||||
%asm {{
|
||||
@ -874,7 +941,6 @@ asmsub print_uwbin (uword value @ AY, ubyte prefix @ Pc) clobbers(A,Y) {
|
||||
}}
|
||||
}
|
||||
|
||||
|
||||
asmsub print_uwhex (uword value @ AY, ubyte prefix @ Pc) clobbers(A,Y) {
|
||||
; ---- print the uword in A/Y in hexadecimal form (4 digits)
|
||||
; (if Carry is set, a radix prefix '$' is printed as well)
|
||||
@ -888,51 +954,44 @@ asmsub print_uwhex (uword value @ AY, ubyte prefix @ Pc) clobbers(A,Y) {
|
||||
}}
|
||||
}
|
||||
|
||||
|
||||
asmsub print_uw0 (uword value @ AY) clobbers(A,Y) {
|
||||
; ---- print the uword in A/Y in decimal form, with left padding 0s (5 positions total)
|
||||
%asm {{
|
||||
stx c64.SCRATCH_ZPREGX
|
||||
jsr c64utils.uword2decimal
|
||||
ldy #0
|
||||
- lda c64utils.uword2decimal.output,y
|
||||
- lda c64utils.uword2decimal.decTenThousands,y
|
||||
beq +
|
||||
jsr c64.CHROUT
|
||||
iny
|
||||
cpy #5
|
||||
bne -
|
||||
+ ldx c64.SCRATCH_ZPREGX
|
||||
rts
|
||||
}}
|
||||
}
|
||||
|
||||
|
||||
asmsub print_uw (uword value @ AY) clobbers(A,Y) {
|
||||
; ---- print the uword in A/Y in decimal form, without left padding 0s
|
||||
%asm {{
|
||||
stx c64.SCRATCH_ZPREGX
|
||||
jsr c64utils.uword2decimal
|
||||
ldy #0
|
||||
lda c64utils.uword2decimal.output
|
||||
- lda c64utils.uword2decimal.decTenThousands,y
|
||||
beq _allzero
|
||||
cmp #'0'
|
||||
bne _pr_decimal
|
||||
iny
|
||||
lda c64utils.uword2decimal.output+1
|
||||
cmp #'0'
|
||||
bne _pr_decimal
|
||||
iny
|
||||
lda c64utils.uword2decimal.output+2
|
||||
cmp #'0'
|
||||
bne _pr_decimal
|
||||
iny
|
||||
lda c64utils.uword2decimal.output+3
|
||||
cmp #'0'
|
||||
bne _pr_decimal
|
||||
bne _gotdigit
|
||||
iny
|
||||
bne -
|
||||
|
||||
_pr_decimal
|
||||
lda c64utils.uword2decimal.output,y
|
||||
_gotdigit
|
||||
jsr c64.CHROUT
|
||||
iny
|
||||
cpy #5
|
||||
bcc _pr_decimal
|
||||
lda c64utils.uword2decimal.decTenThousands,y
|
||||
bne _gotdigit
|
||||
rts
|
||||
_allzero
|
||||
lda #'0'
|
||||
jmp c64.CHROUT
|
||||
}}
|
||||
}
|
||||
|
||||
|
||||
@ -1,2 +1 @@
|
||||
1.62
|
||||
|
||||
|
||||
@ -550,6 +550,15 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
|
||||
}
|
||||
}
|
||||
}
|
||||
"rsave" -> {
|
||||
// save cpu status flag and all registers A, X, Y.
|
||||
// see http://6502.org/tutorials/register_preservation.html
|
||||
asmgen.out(" php | sta ${C64Zeropage.SCRATCH_REG} | pha | txa | pha | tya | pha | lda ${C64Zeropage.SCRATCH_REG}")
|
||||
}
|
||||
"rrestore" -> {
|
||||
// restore all registers and cpu status flag
|
||||
asmgen.out(" pla | tay | pla | tax | pla | plp")
|
||||
}
|
||||
else -> {
|
||||
translateFunctionArguments(fcall.arglist, func)
|
||||
asmgen.out(" jsr prog8_lib.func_$functionName")
|
||||
|
||||
62
examples/testprints.p8
Normal file
62
examples/testprints.p8
Normal file
@ -0,0 +1,62 @@
|
||||
%zeropage basicsafe
|
||||
|
||||
main {
|
||||
|
||||
sub start() {
|
||||
|
||||
c64scr.print("print uw0:")
|
||||
c64scr.print_uw0(53204)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_uw0(3204)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_uw0(204)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_uw0(14)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_uw0(4)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_uw0(0)
|
||||
c64.CHROUT('\n')
|
||||
|
||||
c64scr.print("print uw:")
|
||||
c64scr.print_uw(53204)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_uw(3204)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_uw(204)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_uw(14)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_uw(4)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_uw(0)
|
||||
c64.CHROUT('\n')
|
||||
|
||||
c64scr.print("print w:")
|
||||
c64scr.print_w(23204)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_w(3204)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_w(204)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_w(14)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_w(4)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_w(0)
|
||||
c64.CHROUT('\n')
|
||||
c64scr.print_w(-23204)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_w(-3204)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_w(-204)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_w(-14)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_w(-4)
|
||||
c64.CHROUT(' ')
|
||||
c64scr.print_w(-0)
|
||||
c64.CHROUT('\n')
|
||||
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user