2020-11-05 00:26:45 +00:00
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; ---- builtin functions
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func_any_b_stack .proc
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jsr func_any_b_into_A
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2020-11-05 21:27:50 +00:00
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sta P8ESTACK_LO,x
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2020-11-05 00:26:45 +00:00
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dex
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rts
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.pend
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func_all_b_stack .proc
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jsr func_all_b_into_A
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2020-11-05 21:27:50 +00:00
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sta P8ESTACK_LO,x
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dex
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rts
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2020-11-05 00:26:45 +00:00
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.pend
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func_any_b_into_A .proc
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; -- any(array), array in P8ZP_SCRATCH_W1, num bytes in A
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sta _cmp_mod+1 ; self-modifying code
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ldy #0
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- lda (P8ZP_SCRATCH_W1),y
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bne _got_any
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iny
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_cmp_mod cpy #255 ; modified
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bne -
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lda #0
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rts
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_got_any lda #1
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rts
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.pend
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func_all_b_into_A .proc
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; -- all(array), array in P8ZP_SCRATCH_W1, num bytes in A
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sta _cmp_mod+1 ; self-modifying code
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ldy #0
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- lda (P8ZP_SCRATCH_W1),y
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beq _got_not_all
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iny
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_cmp_mod cpy #255 ; modified
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bne -
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lda #1
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_got_not_all rts
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.pend
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2020-11-05 21:27:50 +00:00
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func_any_w_into_A .proc
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asl a
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jmp func_any_b_into_A
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.pend
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func_any_w_stack .proc
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asl a
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jsr func_any_b_into_A
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sta P8ESTACK_LO,x
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dex
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rts
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.pend
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func_all_w_into_A .proc
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; -- all(warray), array in P8ZP_SCRATCH_W1, num bytes in A
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asl a ; times 2 because of word
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sta _cmp_mod+1 ; self-modifying code
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ldy #0
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- lda (P8ZP_SCRATCH_W1),y
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bne +
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iny
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lda (P8ZP_SCRATCH_W1),y
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bne ++
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lda #0
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rts
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+ iny
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+ iny
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_cmp_mod cpy #255 ; modified
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bne -
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lda #1
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rts
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.pend
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func_all_w_stack .proc
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jsr func_all_w_into_A
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sta P8ESTACK_LO,x
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dex
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rts
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.pend
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abs_b_stack .proc
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2022-04-18 19:20:01 +00:00
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; -- push abs(A) on stack (as unsigned word)
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2022-06-23 23:51:54 +00:00
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jsr abs_b_into_AY
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2020-11-05 21:27:50 +00:00
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sta P8ESTACK_LO,x
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2022-06-23 23:51:54 +00:00
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stz P8ESTACK_HI,x
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2020-11-05 21:27:50 +00:00
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dex
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rts
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.pend
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2022-04-18 19:20:01 +00:00
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abs_b_into_AY .proc
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; -- AY = abs(A) (abs always returns unsigned word)
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ldy #0
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2020-11-05 21:27:50 +00:00
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cmp #0
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bmi +
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rts
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+ eor #$ff
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clc
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adc #1
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rts
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.pend
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abs_w_stack .proc
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; -- push abs(AY) on stack (as word)
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jsr abs_w_into_AY
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sta P8ESTACK_LO,x
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tya
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sta P8ESTACK_HI,x
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dex
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rts
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.pend
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abs_w_into_AY .proc
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; -- AY = abs(AY)
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cpy #0
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bmi +
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rts
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+ eor #$ff
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pha
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tya
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eor #$ff
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tay
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pla
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clc
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adc #1
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bcc +
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iny
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+ rts
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.pend
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func_sign_b_into_A .proc
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cmp #0
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beq _zero
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bmi _neg
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lda #1
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_zero rts
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_neg lda #-1
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rts
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.pend
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func_sign_b_stack .proc
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jsr func_sign_b_into_A
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sta P8ESTACK_LO,x
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dex
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rts
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.pend
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func_sign_ub_into_A .proc
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cmp #0
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bne _pos
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rts
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_pos lda #1
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rts
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.pend
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func_sign_ub_stack .proc
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jsr func_sign_ub_into_A
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sta P8ESTACK_LO,x
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dex
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rts
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.pend
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func_sign_uw_into_A .proc
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cpy #0
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beq _possibly_zero
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_pos lda #1
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rts
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_possibly_zero cmp #0
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bne _pos
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rts
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.pend
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func_sign_uw_stack .proc
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jsr func_sign_uw_into_A
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sta P8ESTACK_LO,x
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dex
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rts
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.pend
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func_sign_w_into_A .proc
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cpy #0
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beq _possibly_zero
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bmi _neg
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_pos lda #1
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rts
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_neg lda #-1
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rts
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_possibly_zero cmp #0
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bne _pos
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rts
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.pend
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func_sign_w_stack .proc
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jsr func_sign_w_into_A
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sta P8ESTACK_LO,x
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dex
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rts
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.pend
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func_sqrt16_stack .proc
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jsr func_sqrt16_into_A
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sta P8ESTACK_LO,x
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dex
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rts
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.pend
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func_sqrt16_into_A .proc
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; integer square root from http://6502org.wikidot.com/software-math-sqrt
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sta P8ZP_SCRATCH_W1
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sty P8ZP_SCRATCH_W1+1
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txa
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pha
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lda #0
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sta P8ZP_SCRATCH_B1
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sta P8ZP_SCRATCH_REG
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ldx #8
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- sec
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lda P8ZP_SCRATCH_W1+1
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sbc #$40
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tay
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lda P8ZP_SCRATCH_REG
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sbc P8ZP_SCRATCH_B1
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bcc +
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sty P8ZP_SCRATCH_W1+1
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sta P8ZP_SCRATCH_REG
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+ rol P8ZP_SCRATCH_B1
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asl P8ZP_SCRATCH_W1
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rol P8ZP_SCRATCH_W1+1
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rol P8ZP_SCRATCH_REG
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asl P8ZP_SCRATCH_W1
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rol P8ZP_SCRATCH_W1+1
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rol P8ZP_SCRATCH_REG
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dex
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bne -
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pla
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tax
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lda P8ZP_SCRATCH_B1
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rts
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.pend
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func_rnd_stack .proc
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; -- put a random ubyte on the estack
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jsr math.randbyte
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sta P8ESTACK_LO,x
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dex
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rts
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.pend
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func_rndw_stack .proc
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; -- put a random uword on the estack
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jsr math.randword
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sta P8ESTACK_LO,x
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tya
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sta P8ESTACK_HI,x
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dex
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rts
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.pend
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func_sort_ub .proc
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; 8bit unsigned sort
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; sorting subroutine coded by mats rosengren (mats.rosengren@esa.int)
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; input: address of array to sort in P8ZP_SCRATCH_W1, length in S
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; first, put pointer BEFORE array
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sta P8ZP_SCRATCH_B1
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lda P8ZP_SCRATCH_W1
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bne +
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dec P8ZP_SCRATCH_W1+1
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+ dec P8ZP_SCRATCH_W1
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_sortloop ldy P8ZP_SCRATCH_B1 ;start of subroutine sort
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lda (P8ZP_SCRATCH_W1),y ;last value in (what is left of) sequence to be sorted
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sta P8ZP_SCRATCH_REG ;save value. will be over-written by largest number
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jmp _l2
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_l1 dey
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beq _l3
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lda (P8ZP_SCRATCH_W1),y
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cmp P8ZP_SCRATCH_W2+1
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bcc _l1
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_l2 sty P8ZP_SCRATCH_W2 ;index of potentially largest value
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sta P8ZP_SCRATCH_W2+1 ;potentially largest value
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jmp _l1
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_l3 ldy P8ZP_SCRATCH_B1 ;where the largest value shall be put
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lda P8ZP_SCRATCH_W2+1 ;the largest value
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sta (P8ZP_SCRATCH_W1),y ;put largest value in place
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ldy P8ZP_SCRATCH_W2 ;index of free space
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lda P8ZP_SCRATCH_REG ;the over-written value
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sta (P8ZP_SCRATCH_W1),y ;put the over-written value in the free space
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dec P8ZP_SCRATCH_B1 ;end of the shorter sequence still left
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bne _sortloop ;start working with the shorter sequence
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rts
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.pend
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func_sort_b .proc
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; 8bit signed sort
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; sorting subroutine coded by mats rosengren (mats.rosengren@esa.int)
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; input: address of array to sort in P8ZP_SCRATCH_W1, length in A
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; first, put pointer BEFORE array
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sta P8ZP_SCRATCH_B1
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lda P8ZP_SCRATCH_W1
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bne +
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dec P8ZP_SCRATCH_W1+1
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+ dec P8ZP_SCRATCH_W1
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_sortloop ldy P8ZP_SCRATCH_B1 ;start of subroutine sort
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lda (P8ZP_SCRATCH_W1),y ;last value in (what is left of) sequence to be sorted
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sta P8ZP_SCRATCH_REG ;save value. will be over-written by largest number
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jmp _l2
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_l1 dey
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beq _l3
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lda (P8ZP_SCRATCH_W1),y
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cmp P8ZP_SCRATCH_W2+1
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bmi _l1
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_l2 sty P8ZP_SCRATCH_W2 ;index of potentially largest value
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sta P8ZP_SCRATCH_W2+1 ;potentially largest value
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jmp _l1
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_l3 ldy P8ZP_SCRATCH_B1 ;where the largest value shall be put
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lda P8ZP_SCRATCH_W2+1 ;the largest value
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sta (P8ZP_SCRATCH_W1),y ;put largest value in place
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ldy P8ZP_SCRATCH_W2 ;index of free space
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lda P8ZP_SCRATCH_REG ;the over-written value
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sta (P8ZP_SCRATCH_W1),y ;put the over-written value in the free space
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dec P8ZP_SCRATCH_B1 ;end of the shorter sequence still left
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bne _sortloop ;start working with the shorter sequence
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rts
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.pend
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func_sort_uw .proc
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; 16bit unsigned sort
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|
; sorting subroutine coded by mats rosengren (mats.rosengren@esa.int)
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|
; input: address of array to sort in P8ZP_SCRATCH_W1, length in A
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|
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; first: subtract 2 of the pointer
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asl a
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sta P8ZP_SCRATCH_B1
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lda P8ZP_SCRATCH_W1
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sec
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sbc #2
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sta P8ZP_SCRATCH_W1
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bcs _sort_loop
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dec P8ZP_SCRATCH_W1+1
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_sort_loop ldy P8ZP_SCRATCH_B1 ;start of subroutine sort
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lda (P8ZP_SCRATCH_W1),y ;last value in (what is left of) sequence to be sorted
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|
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sta _work3 ;save value. will be over-written by largest number
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|
iny
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lda (P8ZP_SCRATCH_W1),y
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sta _work3+1
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dey
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jmp _l2
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_l1 dey
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dey
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beq _l3
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|
iny
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lda (P8ZP_SCRATCH_W1),y
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dey
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|
cmp P8ZP_SCRATCH_W2+1
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|
bne +
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|
lda (P8ZP_SCRATCH_W1),y
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|
cmp P8ZP_SCRATCH_W2
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|
+ bcc _l1
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_l2 sty _work1 ;index of potentially largest value
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|
lda (P8ZP_SCRATCH_W1),y
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|
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|
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sta P8ZP_SCRATCH_W2 ;potentially largest value
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|
iny
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|
lda (P8ZP_SCRATCH_W1),y
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sta P8ZP_SCRATCH_W2+1
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dey
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jmp _l1
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_l3 ldy P8ZP_SCRATCH_B1 ;where the largest value shall be put
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lda P8ZP_SCRATCH_W2 ;the largest value
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sta (P8ZP_SCRATCH_W1),y ;put largest value in place
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|
|
|
|
iny
|
|
|
|
|
lda P8ZP_SCRATCH_W2+1
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|
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|
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sta (P8ZP_SCRATCH_W1),y
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|
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ldy _work1 ;index of free space
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|
|
|
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lda _work3 ;the over-written value
|
|
|
|
|
sta (P8ZP_SCRATCH_W1),y ;put the over-written value in the free space
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|
|
|
|
iny
|
|
|
|
|
lda _work3+1
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|
|
|
|
sta (P8ZP_SCRATCH_W1),y
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|
|
|
|
dey
|
|
|
|
|
dec P8ZP_SCRATCH_B1 ;end of the shorter sequence still left
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|
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|
|
dec P8ZP_SCRATCH_B1
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|
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|
|
bne _sort_loop ;start working with the shorter sequence
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|
|
|
|
rts
|
|
|
|
|
_work1 .byte 0
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|
|
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|
_work3 .word 0
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|
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|
|
.pend
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
func_sort_w .proc
|
|
|
|
|
; 16bit signed sort
|
|
|
|
|
; sorting subroutine coded by mats rosengren (mats.rosengren@esa.int)
|
|
|
|
|
; input: address of array to sort in P8ZP_SCRATCH_W1, length in A
|
|
|
|
|
; first: subtract 2 of the pointer
|
|
|
|
|
asl a
|
|
|
|
|
sta P8ZP_SCRATCH_B1
|
|
|
|
|
lda P8ZP_SCRATCH_W1
|
|
|
|
|
sec
|
|
|
|
|
sbc #2
|
|
|
|
|
sta P8ZP_SCRATCH_W1
|
|
|
|
|
bcs _sort_loop
|
|
|
|
|
dec P8ZP_SCRATCH_W1+1
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|
|
|
|
_sort_loop ldy P8ZP_SCRATCH_B1 ;start of subroutine sort
|
|
|
|
|
lda (P8ZP_SCRATCH_W1),y ;last value in (what is left of) sequence to be sorted
|
|
|
|
|
sta _work3 ;save value. will be over-written by largest number
|
|
|
|
|
iny
|
|
|
|
|
lda (P8ZP_SCRATCH_W1),y
|
|
|
|
|
sta _work3+1
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|
|
|
|
dey
|
|
|
|
|
jmp _l2
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|
|
|
|
_l1 dey
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|
|
|
|
dey
|
|
|
|
|
beq _l3
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|
|
|
|
lda (P8ZP_SCRATCH_W1),y
|
|
|
|
|
cmp P8ZP_SCRATCH_W2
|
|
|
|
|
iny
|
|
|
|
|
lda (P8ZP_SCRATCH_W1),y
|
|
|
|
|
dey
|
|
|
|
|
sbc P8ZP_SCRATCH_W2+1
|
|
|
|
|
bvc +
|
|
|
|
|
eor #$80
|
|
|
|
|
+ bmi _l1
|
|
|
|
|
_l2 sty _work1 ;index of potentially largest value
|
|
|
|
|
lda (P8ZP_SCRATCH_W1),y
|
|
|
|
|
sta P8ZP_SCRATCH_W2 ;potentially largest value
|
|
|
|
|
iny
|
|
|
|
|
lda (P8ZP_SCRATCH_W1),y
|
|
|
|
|
sta P8ZP_SCRATCH_W2+1
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|
|
|
|
dey
|
|
|
|
|
jmp _l1
|
|
|
|
|
_l3 ldy P8ZP_SCRATCH_B1 ;where the largest value shall be put
|
|
|
|
|
lda P8ZP_SCRATCH_W2 ;the largest value
|
|
|
|
|
sta (P8ZP_SCRATCH_W1),y ;put largest value in place
|
|
|
|
|
iny
|
|
|
|
|
lda P8ZP_SCRATCH_W2+1
|
|
|
|
|
sta (P8ZP_SCRATCH_W1),y
|
|
|
|
|
ldy _work1 ;index of free space
|
|
|
|
|
lda _work3 ;the over-written value
|
|
|
|
|
sta (P8ZP_SCRATCH_W1),y ;put the over-written value in the free space
|
|
|
|
|
iny
|
|
|
|
|
lda _work3+1
|
|
|
|
|
sta (P8ZP_SCRATCH_W1),y
|
|
|
|
|
dey
|
|
|
|
|
dec P8ZP_SCRATCH_B1 ;end of the shorter sequence still left
|
|
|
|
|
dec P8ZP_SCRATCH_B1
|
|
|
|
|
bne _sort_loop ;start working with the shorter sequence
|
|
|
|
|
rts
|
|
|
|
|
_work1 .byte 0
|
|
|
|
|
_work3 .word 0
|
|
|
|
|
.pend
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
func_reverse_b .proc
|
|
|
|
|
; --- reverse an array of bytes (in-place)
|
|
|
|
|
; inputs: pointer to array in P8ZP_SCRATCH_W1, length in A
|
|
|
|
|
_index_right = P8ZP_SCRATCH_W2
|
|
|
|
|
_index_left = P8ZP_SCRATCH_W2+1
|
|
|
|
|
_loop_count = P8ZP_SCRATCH_REG
|
|
|
|
|
sta _loop_count
|
|
|
|
|
lsr _loop_count
|
|
|
|
|
sec
|
|
|
|
|
sbc #1
|
|
|
|
|
sta _index_right
|
|
|
|
|
lda #0
|
|
|
|
|
sta _index_left
|
|
|
|
|
_loop ldy _index_right
|
|
|
|
|
lda (P8ZP_SCRATCH_W1),y
|
|
|
|
|
pha
|
|
|
|
|
ldy _index_left
|
|
|
|
|
lda (P8ZP_SCRATCH_W1),y
|
|
|
|
|
ldy _index_right
|
|
|
|
|
sta (P8ZP_SCRATCH_W1),y
|
|
|
|
|
pla
|
|
|
|
|
ldy _index_left
|
|
|
|
|
sta (P8ZP_SCRATCH_W1),y
|
|
|
|
|
inc _index_left
|
|
|
|
|
dec _index_right
|
|
|
|
|
dec _loop_count
|
|
|
|
|
bne _loop
|
|
|
|
|
rts
|
|
|
|
|
.pend
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
func_reverse_w .proc
|
|
|
|
|
; --- reverse an array of words (in-place)
|
|
|
|
|
; inputs: pointer to array in P8ZP_SCRATCH_W1, length in A
|
|
|
|
|
_index_first = P8ZP_SCRATCH_W2
|
|
|
|
|
_index_second = P8ZP_SCRATCH_W2+1
|
|
|
|
|
_loop_count = P8ZP_SCRATCH_REG
|
|
|
|
|
pha
|
|
|
|
|
asl a ; *2 because words
|
|
|
|
|
sec
|
|
|
|
|
sbc #2
|
|
|
|
|
sta _index_first
|
|
|
|
|
lda #0
|
|
|
|
|
sta _index_second
|
|
|
|
|
pla
|
|
|
|
|
lsr a
|
|
|
|
|
pha
|
|
|
|
|
sta _loop_count
|
|
|
|
|
; first reverse the lsbs
|
|
|
|
|
_loop_lo ldy _index_first
|
|
|
|
|
lda (P8ZP_SCRATCH_W1),y
|
|
|
|
|
pha
|
|
|
|
|
ldy _index_second
|
|
|
|
|
lda (P8ZP_SCRATCH_W1),y
|
|
|
|
|
ldy _index_first
|
|
|
|
|
sta (P8ZP_SCRATCH_W1),y
|
|
|
|
|
pla
|
|
|
|
|
ldy _index_second
|
|
|
|
|
sta (P8ZP_SCRATCH_W1),y
|
|
|
|
|
inc _index_second
|
|
|
|
|
inc _index_second
|
|
|
|
|
dec _index_first
|
|
|
|
|
dec _index_first
|
|
|
|
|
dec _loop_count
|
|
|
|
|
bne _loop_lo
|
|
|
|
|
; now reverse the msbs
|
|
|
|
|
dec _index_second
|
|
|
|
|
inc _index_first
|
|
|
|
|
inc _index_first
|
|
|
|
|
inc _index_first
|
|
|
|
|
pla
|
|
|
|
|
sta _loop_count
|
|
|
|
|
_loop_hi ldy _index_first
|
|
|
|
|
lda (P8ZP_SCRATCH_W1),y
|
|
|
|
|
pha
|
|
|
|
|
ldy _index_second
|
|
|
|
|
lda (P8ZP_SCRATCH_W1),y
|
|
|
|
|
ldy _index_first
|
|
|
|
|
sta (P8ZP_SCRATCH_W1),y
|
|
|
|
|
pla
|
|
|
|
|
ldy _index_second
|
|
|
|
|
sta (P8ZP_SCRATCH_W1),y
|
|
|
|
|
dec _index_second
|
|
|
|
|
dec _index_second
|
|
|
|
|
inc _index_first
|
|
|
|
|
inc _index_first
|
|
|
|
|
dec _loop_count
|
|
|
|
|
bne _loop_hi
|
|
|
|
|
|
|
|
|
|
rts
|
|
|
|
|
.pend
|
|
|
|
|
|
|
|
|
|
|
2021-02-13 22:04:46 +00:00
|
|
|
func_peekw .proc
|
|
|
|
|
; -- read the word value on the address in AY
|
|
|
|
|
sta P8ZP_SCRATCH_W1
|
|
|
|
|
sty P8ZP_SCRATCH_W1+1
|
|
|
|
|
ldy #0
|
|
|
|
|
lda (P8ZP_SCRATCH_W1),y
|
|
|
|
|
pha
|
|
|
|
|
iny
|
|
|
|
|
lda (P8ZP_SCRATCH_W1),y
|
|
|
|
|
tay
|
|
|
|
|
pla
|
|
|
|
|
rts
|
|
|
|
|
.pend
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
func_pokew .proc
|
|
|
|
|
; -- store the word value in AY in the address in P8ZP_SCRATCH_W1
|
|
|
|
|
sty P8ZP_SCRATCH_REG
|
|
|
|
|
ldy #0
|
|
|
|
|
sta (P8ZP_SCRATCH_W1),y
|
|
|
|
|
iny
|
|
|
|
|
lda P8ZP_SCRATCH_REG
|
|
|
|
|
sta (P8ZP_SCRATCH_W1),y
|
|
|
|
|
rts
|
|
|
|
|
.pend
|
