30 lines
306 B
NASM
30 lines
306 B
NASM
check_is_number:
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cmp al, 48
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jl .not_number
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cmp al, 57
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jg .not_number
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stc
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ret
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.not_number:
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clc
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ret
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check_is_letter:
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cmp al, 65
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jl .not_letter
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cmp al, 122
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jg .not_letter
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cmp al, 90
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jg .maybe_not_letter
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stc
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ret
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.maybe_not_letter:
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cmp al, 97
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jl .not_letter
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stc
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ret
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.not_letter:
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clc
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ret
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