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https://gitlab.com/camelot/kickc.git
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647 lines
11 KiB
NASM
647 lines
11 KiB
NASM
// A lightweight library for printing on the C64.
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// Printing with this library is done by calling print_ function for each element
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// Commodore 64 PRG executable file
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.file [name="test-comparisons.prg", type="prg", segments="Program"]
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.segmentdef Program [segments="Basic, Code, Data"]
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.segmentdef Basic [start=$0801]
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.segmentdef Code [start=$80d]
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.segmentdef Data [startAfter="Code"]
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.segment Basic
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:BasicUpstart(main)
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.label print_screen = $400
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.label print_line_cursor = 6
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.label print_char_cursor = $a
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.segment Code
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main: {
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.label b = $c
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.label a = 2
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.label i = 3
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.label r = 4
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// print_cls()
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jsr print_cls
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lda #<print_screen
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sta.z print_line_cursor
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lda #>print_screen
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sta.z print_line_cursor+1
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lda #0
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sta.z i
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lda #<print_screen
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sta.z print_char_cursor
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lda #>print_screen
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sta.z print_char_cursor+1
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lda #7
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sta.z a
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__b1:
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// byte b = $ce-a
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lda #$ce
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sec
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sbc.z a
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sta.z b
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// if(a<b)
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lda.z a
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cmp.z b
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bcs __b22
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ldy #'+'
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jmp __b2
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__b22:
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ldy #'-'
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__b2:
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// printu(a, "< ", b, r)
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ldx.z a
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lda.z b
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sta.z printu.b
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sty.z printu.res
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lda #<op
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sta.z printu.op
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lda #>op
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sta.z printu.op+1
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jsr printu
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// if(a<$37)
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lda.z a
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cmp #$37
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bcs __b23
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lda #'+'
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jmp __b3
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__b23:
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lda #'-'
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__b3:
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// printu(a, "< ", $37, r)
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ldx.z a
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sta.z printu.res
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lda #$37
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sta.z printu.b
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lda #<op
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sta.z printu.op
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lda #>op
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sta.z printu.op+1
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jsr printu
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// if(a<cs[i])
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lda.z a
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ldy.z i
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cmp cs,y
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bcs __b24
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lda #'+'
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sta.z r
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jmp __b4
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__b24:
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lda #'-'
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sta.z r
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__b4:
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// printu(a, "< ", cs[i], r)
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ldx.z a
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ldy.z i
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lda cs,y
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sta.z printu.b
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lda #<op
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sta.z printu.op
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lda #>op
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sta.z printu.op+1
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jsr printu
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// if(a<a)
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lda.z a
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cmp.z a
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bcs __b25
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ldy #'+'
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jmp __b5
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__b25:
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ldy #'-'
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__b5:
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// printu(a, "< ", a, r)
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ldx.z a
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txa
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sta.z printu.b
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sty.z printu.res
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lda #<op
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sta.z printu.op
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lda #>op
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sta.z printu.op+1
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jsr printu
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// print_ln()
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jsr print_ln
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// if(a>b)
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lda.z b
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cmp.z a
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bcs __b26
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ldy #'+'
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jmp __b6
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__b26:
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ldy #'-'
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__b6:
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// printu(a, "> ", b, r)
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ldx.z a
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lda.z b
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sta.z printu.b
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sty.z printu.res
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lda.z print_line_cursor
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sta.z print_char_cursor
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lda.z print_line_cursor+1
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sta.z print_char_cursor+1
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// printu(a, "> ", b, r)
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lda #<op4
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sta.z printu.op
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lda #>op4
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sta.z printu.op+1
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jsr printu
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// if(a>$37)
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lda.z a
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cmp #$37+1
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bcc __b27
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lda #'+'
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jmp __b7
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__b27:
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lda #'-'
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__b7:
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// printu(a, "> ", $37, r)
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ldx.z a
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sta.z printu.res
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lda #$37
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sta.z printu.b
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lda #<op4
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sta.z printu.op
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lda #>op4
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sta.z printu.op+1
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jsr printu
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// if(a>cs[i])
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ldy.z i
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lda cs,y
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cmp.z a
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bcs __b28
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lda #'+'
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sta.z r
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jmp __b8
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__b28:
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lda #'-'
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sta.z r
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__b8:
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// printu(a, "> ", cs[i], r)
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ldx.z a
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ldy.z i
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lda cs,y
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sta.z printu.b
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lda #<op4
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sta.z printu.op
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lda #>op4
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sta.z printu.op+1
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jsr printu
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// if(a>a)
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lda.z a
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cmp.z a
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bcs __b29
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ldy #'+'
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jmp __b9
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__b29:
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ldy #'-'
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__b9:
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// printu(a, "> ", a, r)
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ldx.z a
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txa
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sta.z printu.b
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sty.z printu.res
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lda #<op4
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sta.z printu.op
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lda #>op4
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sta.z printu.op+1
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jsr printu
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// print_ln()
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jsr print_ln
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// if(a<=b)
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lda.z b
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cmp.z a
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bcc __b30
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ldy #'+'
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jmp __b10
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__b30:
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ldy #'-'
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__b10:
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// printu(a, "<=", b, r)
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ldx.z a
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lda.z b
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sta.z printu.b
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sty.z printu.res
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lda.z print_line_cursor
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sta.z print_char_cursor
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lda.z print_line_cursor+1
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sta.z print_char_cursor+1
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// printu(a, "<=", b, r)
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lda #<op8
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sta.z printu.op
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lda #>op8
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sta.z printu.op+1
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jsr printu
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// if(a<=$37)
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lda.z a
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cmp #$37+1
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bcs __b31
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lda #'+'
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jmp __b11
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__b31:
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lda #'-'
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__b11:
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// printu(a, "<=", $37, r)
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ldx.z a
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sta.z printu.res
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lda #$37
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sta.z printu.b
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lda #<op8
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sta.z printu.op
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lda #>op8
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sta.z printu.op+1
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jsr printu
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// if(a<=cs[i])
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ldy.z i
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lda cs,y
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cmp.z a
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bcc __b32
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lda #'+'
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sta.z r
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jmp __b12
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__b32:
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lda #'-'
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sta.z r
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__b12:
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// printu(a, "<=", cs[i], r)
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ldx.z a
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ldy.z i
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lda cs,y
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sta.z printu.b
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lda #<op8
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sta.z printu.op
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lda #>op8
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sta.z printu.op+1
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jsr printu
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// if(a<=a)
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lda.z a
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cmp.z a
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bcc __b33
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ldy #'+'
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jmp __b13
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__b33:
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ldy #'-'
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__b13:
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// printu(a, "<=", a, r)
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ldx.z a
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txa
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sta.z printu.b
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sty.z printu.res
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lda #<op8
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sta.z printu.op
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lda #>op8
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sta.z printu.op+1
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jsr printu
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// print_ln()
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jsr print_ln
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// if(a>=b)
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lda.z a
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cmp.z b
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bcc __b34
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ldy #'+'
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jmp __b14
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__b34:
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ldy #'-'
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__b14:
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// printu(a, ">=", b, r)
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ldx.z a
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lda.z b
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sta.z printu.b
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sty.z printu.res
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lda.z print_line_cursor
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sta.z print_char_cursor
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lda.z print_line_cursor+1
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sta.z print_char_cursor+1
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// printu(a, ">=", b, r)
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lda #<op12
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sta.z printu.op
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lda #>op12
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sta.z printu.op+1
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jsr printu
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// if(a>=$37)
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lda.z a
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cmp #$37
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bcc __b35
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lda #'+'
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jmp __b15
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__b35:
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lda #'-'
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__b15:
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// printu(a, ">=", $37, r)
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ldx.z a
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sta.z printu.res
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lda #$37
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sta.z printu.b
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lda #<op12
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sta.z printu.op
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lda #>op12
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sta.z printu.op+1
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jsr printu
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// if(a>=cs[i])
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lda.z a
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ldy.z i
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cmp cs,y
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bcc __b36
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lda #'+'
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sta.z r
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jmp __b16
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__b36:
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lda #'-'
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sta.z r
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__b16:
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// printu(a, ">=", cs[i], r)
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ldx.z a
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ldy.z i
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lda cs,y
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sta.z printu.b
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lda #<op12
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sta.z printu.op
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lda #>op12
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sta.z printu.op+1
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jsr printu
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// if(a>=a)
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lda.z a
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cmp.z a
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bcc __b37
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ldy #'+'
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jmp __b17
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__b37:
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ldy #'-'
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__b17:
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// printu(a, ">=", a, r)
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ldx.z a
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txa
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sta.z printu.b
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sty.z printu.res
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lda #<op12
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sta.z printu.op
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lda #>op12
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sta.z printu.op+1
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jsr printu
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// print_ln()
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jsr print_ln
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// if(a==b)
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lda.z a
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cmp.z b
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bne __b38
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ldy #'+'
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jmp __b18
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__b38:
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ldy #'-'
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__b18:
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// printu(a, "==", b, r)
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ldx.z a
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lda.z b
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sta.z printu.b
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sty.z printu.res
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lda.z print_line_cursor
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sta.z print_char_cursor
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lda.z print_line_cursor+1
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sta.z print_char_cursor+1
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// printu(a, "==", b, r)
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lda #<op16
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sta.z printu.op
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lda #>op16
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sta.z printu.op+1
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jsr printu
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// if(a==$37)
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lda #$37
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cmp.z a
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bne __b39
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lda #'+'
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jmp __b19
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__b39:
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lda #'-'
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__b19:
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// printu(a, "==", $37, r)
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ldx.z a
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sta.z printu.res
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lda #$37
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sta.z printu.b
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lda #<op16
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sta.z printu.op
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lda #>op16
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sta.z printu.op+1
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jsr printu
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// if(a==cs[i])
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lda.z a
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ldy.z i
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cmp cs,y
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bne __b40
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lda #'+'
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sta.z r
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jmp __b20
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__b40:
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lda #'-'
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sta.z r
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__b20:
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// printu(a, "==", cs[i], r)
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ldx.z a
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ldy.z i
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lda cs,y
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sta.z printu.b
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lda #<op16
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sta.z printu.op
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lda #>op16
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sta.z printu.op+1
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jsr printu
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// if(a==a)
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lda.z a
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cmp.z a
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bne __b41
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ldy #'+'
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jmp __b21
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__b41:
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ldy #'-'
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__b21:
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// printu(a, "==", a, r)
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ldx.z a
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txa
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sta.z printu.b
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sty.z printu.res
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lda #<op16
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sta.z printu.op
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lda #>op16
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sta.z printu.op+1
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jsr printu
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// print_ln()
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jsr print_ln
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// a=a+$30
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lax.z a
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axs #-[$30]
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stx.z a
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// for( byte i : 0..4 )
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inc.z i
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lda #5
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cmp.z i
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bne __b68
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__b42:
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jmp __b42
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__b68:
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lda.z print_line_cursor
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sta.z print_char_cursor
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lda.z print_line_cursor+1
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sta.z print_char_cursor+1
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jmp __b1
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.segment Data
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cs: .byte 7, $c7, $37, $97, $67
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op: .text "< "
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.byte 0
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op4: .text "> "
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.byte 0
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op8: .text "<="
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.byte 0
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op12: .text ">="
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.byte 0
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op16: .text "=="
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.byte 0
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}
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.segment Code
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// Clear the screen. Also resets current line/char cursor.
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print_cls: {
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// memset(print_screen, ' ', 1000)
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jsr memset
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// }
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rts
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}
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// printu(byte register(X) a, byte* zp(8) op, byte zp(5) b, byte zp(4) res)
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printu: {
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.label b = 5
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.label res = 4
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.label op = 8
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// print_char(' ')
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lda #' '
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jsr print_char
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// print_uchar(a)
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jsr print_uchar
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// print_str(op)
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jsr print_str
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// print_uchar(b)
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ldx.z b
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jsr print_uchar
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// print_char(' ')
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lda #' '
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jsr print_char
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// print_char(res)
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lda.z res
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jsr print_char
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// }
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rts
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}
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// Print a newline
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print_ln: {
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__b1:
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// print_line_cursor + $28
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lda #$28
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clc
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adc.z print_line_cursor
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sta.z print_line_cursor
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bcc !+
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inc.z print_line_cursor+1
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!:
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// while (print_line_cursor<print_char_cursor)
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lda.z print_line_cursor+1
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cmp.z print_char_cursor+1
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bcc __b1
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bne !+
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lda.z print_line_cursor
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cmp.z print_char_cursor
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bcc __b1
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!:
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// }
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rts
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}
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// Copies the character c (an unsigned char) to the first num characters of the object pointed to by the argument str.
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memset: {
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.const c = ' '
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.const num = $3e8
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.label str = print_screen
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.label end = str+num
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.label dst = 8
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lda #<str
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sta.z dst
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lda #>str
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sta.z dst+1
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__b1:
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// for(char* dst = str; dst!=end; dst++)
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lda.z dst+1
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cmp #>end
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bne __b2
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lda.z dst
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cmp #<end
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bne __b2
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// }
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rts
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__b2:
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// *dst = c
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lda #c
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ldy #0
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sta (dst),y
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// for(char* dst = str; dst!=end; dst++)
|
|
inc.z dst
|
|
bne !+
|
|
inc.z dst+1
|
|
!:
|
|
jmp __b1
|
|
}
|
|
// Print a single char
|
|
// print_char(byte register(A) ch)
|
|
print_char: {
|
|
// *(print_char_cursor++) = ch
|
|
ldy #0
|
|
sta (print_char_cursor),y
|
|
// *(print_char_cursor++) = ch;
|
|
inc.z print_char_cursor
|
|
bne !+
|
|
inc.z print_char_cursor+1
|
|
!:
|
|
// }
|
|
rts
|
|
}
|
|
// Print a char as HEX
|
|
// print_uchar(byte register(X) b)
|
|
print_uchar: {
|
|
// b>>4
|
|
txa
|
|
lsr
|
|
lsr
|
|
lsr
|
|
lsr
|
|
// print_char(print_hextab[b>>4])
|
|
tay
|
|
lda print_hextab,y
|
|
// Table of hexadecimal digits
|
|
jsr print_char
|
|
// b&$f
|
|
txa
|
|
and #$f
|
|
// print_char(print_hextab[b&$f])
|
|
tay
|
|
lda print_hextab,y
|
|
jsr print_char
|
|
// }
|
|
rts
|
|
}
|
|
// Print a zero-terminated string
|
|
// print_str(byte* zp(8) str)
|
|
print_str: {
|
|
.label str = 8
|
|
__b1:
|
|
// while(*str)
|
|
ldy #0
|
|
lda (str),y
|
|
cmp #0
|
|
bne __b2
|
|
// }
|
|
rts
|
|
__b2:
|
|
// print_char(*(str++))
|
|
ldy #0
|
|
lda (str),y
|
|
jsr print_char
|
|
// print_char(*(str++));
|
|
inc.z str
|
|
bne !+
|
|
inc.z str+1
|
|
!:
|
|
jmp __b1
|
|
}
|
|
.segment Data
|
|
print_hextab: .text "0123456789abcdef"
|