45 lines
824 B
ArmAsm
45 lines
824 B
ArmAsm
global _ft_puts
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global ft_puts
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extern ft_strlen
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extern ft_putchar
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%define STDOUT 1
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section .data
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string db "(null)"
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.len: equ $ - string
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_ft_puts: ; int puts(const char *s)
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ft_puts:
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push rdi ; because strlen will clobber rdi
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call ft_strlen
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pop rdi
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cmp rax, 0
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je print_nl ; if empty string skip printing
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print_string:
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; int write(int fd, const char *str, size_t size)
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mov rsi, rdi ; char *str
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mov rdi, STDOUT ; int fd
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mov rdx, rax ; size_t strlen
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mov rax, WRITE ; WRITE
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syscall
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cmp rax, 0
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jl error
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print_nl:
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; xor rdi, rdi
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; add rdi, 0xa
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mov rdi, 0xa
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call ft_putchar
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cmp rax, 0
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jl error
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success:
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mov rax, 0xa ; success returns '\n'
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ret
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error:
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mov rax, -1 ; Return EOF (alias -1) on error
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ret
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