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conv.str_ub and partners are now much shorter routines than before
This commit is contained in:
Irmen de Jong
parent
119040fc50
commit
dd0f0fe415
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@ -8,92 +8,90 @@ conv {
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str @shared string_out = "????????????????" ; result buffer for the string conversion routines
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asmsub str_ub0 (ubyte value @ A) clobbers(X) -> str @AY {
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; ---- convert the ubyte in A in decimal string form, with left padding 0s (3 positions total)
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%asm {{
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jsr conv.ubyte2decimal
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sty string_out
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sta string_out+1
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stx string_out+2
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lda #0
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sta string_out+3
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lda #<string_out
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ldy #>string_out
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rts
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}}
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}
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asmsub str_ub0(ubyte value @A) clobbers(X) -> str @AY {
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; ---- convert the ubyte in A in decimal string form, with left padding 0s (3 positions total)
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%asm {{
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jsr internal_str_ub0
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sty conv.string_out
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stx conv.string_out+1
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sta conv.string_out+2
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lda #0
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sta conv.string_out+3
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lda #<conv.string_out
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ldy #>conv.string_out
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rts
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}}
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}
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asmsub str_ub (ubyte value @ A) clobbers(X) -> str @AY {
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; ---- convert the ubyte in A in decimal string form, without left padding 0s
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%asm {{
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ldy #0
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sty P8ZP_SCRATCH_B1
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jsr ubyte2decimal ; result in Y/A/X (100s, 10s, 1s).
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; hundreds?
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cpy #'0'
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beq +
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sty string_out
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sta string_out+1
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stx string_out+2
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lda #0
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sta string_out+3
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jmp _done
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; tens?
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+ cmp #'0'
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beq +
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sta string_out
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stx string_out+1
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lda #0
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sta string_out+2
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jmp _done
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+ ; ones.
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stx string_out
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lda #0
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sta string_out+1
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_done lda #<string_out
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ldy #>string_out
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rts
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}}
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}
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asmsub str_ub(ubyte value @A) clobbers(X) -> str @AY {
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; ---- convert the ubyte in A in decimal string form, without left padding 0s
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%asm {{
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jsr internal_str_ub0
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cpy #'0'
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beq +
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sty conv.string_out
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stx conv.string_out+1
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sta conv.string_out+2
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lda #0
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sta conv.string_out+3
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jmp _done
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+ cpx #'0'
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beq +
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stx conv.string_out
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sta conv.string_out+1
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lda #0
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sta conv.string_out+2
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jmp _done
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+ sta conv.string_out
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lda #0
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sta conv.string_out+1
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_done lda #<conv.string_out
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ldy #>conv.string_out
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rts
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}}
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}
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asmsub str_b (byte value @ A) clobbers(X) -> str @AY {
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; ---- convert the byte in A in decimal string form, without left padding 0s
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%asm {{
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ldy #0
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cmp #0
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bpl +
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ldy #'-'
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sty string_out
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ldy #1
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+ sty P8ZP_SCRATCH_REG
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jsr conv.byte2decimal ; result in Y/A/X (100s, 10s, 1s). and in uword2decimal.decHundreds, decTens, decOnes.
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; hundreds?
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cpy #'0'
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bne _out_hundreds
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ldy P8ZP_SCRATCH_REG
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cmp #'0'
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bne _out_tens
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beq _out_ones
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_out_hundreds
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ldy P8ZP_SCRATCH_REG
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lda uword2decimal.decHundreds
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sta string_out,y
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iny
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_out_tens
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lda uword2decimal.decTens
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sta string_out,y
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iny
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_out_ones
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lda uword2decimal.decOnes
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sta string_out,y
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iny
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lda #0
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sta string_out,y
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lda #<string_out
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ldy #>string_out
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rts
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}}
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}
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asmsub str_b(byte value @A) clobbers(X) -> str @AY {
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; ---- convert the byte in A in decimal string form, without left padding 0s
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%asm {{
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cmp #0
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bpl str_ub
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eor #255
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clc
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adc #1
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jsr str_ub
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; insert a minus sign at the start
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lda #0
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sta conv.string_out+4
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lda conv.string_out+2
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sta conv.string_out+3
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lda conv.string_out+1
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sta conv.string_out+2
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lda conv.string_out
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sta conv.string_out+1
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lda #'-'
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sta conv.string_out
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lda #<conv.string_out
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ldy #>conv.string_out
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rts
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}}
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}
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asmsub internal_str_ub0(ubyte value @A) -> ubyte @Y, ubyte @X, ubyte @A {
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%asm {{
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ldy #'0'-1
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ldx #'9'+1
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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 #'0'-1
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rts
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}}
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}
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asmsub str_ubhex (ubyte value @ A) clobbers(X) -> str @AY {
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; ---- convert the ubyte in A in hex string form
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@ -1,8 +1,6 @@
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TODO
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====
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- add more optimized routine in conv to convert (u)byte to string. (it now reuses the pretty large word to string routine)
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...
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@ -1,15 +1,29 @@
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; test_divmode.p8
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%import textio
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%import conv
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%zeropage basicsafe
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%option no_sysinit
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main {
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ubyte c
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ubyte l
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sub start() {
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divmod(99, 10, c, l)
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for cx16.r0L in 0 to 255 {
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txt.print(conv.str_ub0(cx16.r0L))
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txt.nl()
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}
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txt.nl()
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txt.nl()
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for cx16.r0L in 0 to 255 {
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txt.print(conv.str_ub(cx16.r0L))
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txt.nl()
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}
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txt.nl()
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txt.nl()
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for cx16.r0sL in -128 to 127 {
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txt.print(conv.str_b(cx16.r0sL))
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txt.nl()
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}
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txt.nl()
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txt.nl()
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}
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}
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