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indy.asm
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948 lines (774 loc) · 12.3 KB
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INDIANA_VERSION: equ 1
bits 64
default rel
%use altreg
%use smartalign
alignmode p6
;; Return stack manipulation.
%macro RBPUSH 1
lea rbp, [rbp - 8]
mov [rbp], %1
%endmacro
%macro RBPOP 1
mov %1, [rbp]
lea rbp, [rbp + 8]
%endmacro
;; Syscall.
%macro SYSCALL 1
mov rax, %1
syscall
%endmacro
%macro SYSCALL 2
mov rdi, %2
SYSCALL %1
%endmacro
%macro SYSCALL 3
mov rsi, %3
SYSCALL %1, %2
%endmacro
%macro SYSCALL 4
mov rdx, %4
SYSCALL %1, %2, %3
%endmacro
;; Main.
%macro NEXT 0
lodsq
jmp [rax]
%endmacro
section .text
align 16
docol:
RBPUSH rsi
lea rsi, [rax + 8]
NEXT
section .bss
alignb 4096
rstack: resb 8192
.$:
START
mov [var_sz], rsp
xor r12, r12
mov rbp, rstack.$
mov rsi, .quit
NEXT
section .rodata
.quit: dq quit
;; Dictionary.
F_IMMED: equ 1000_0000b
F_HIDDEN: equ 0100_0000b
F_LENMASK: equ 0011_1111b
%define LINK 0
;; DEFWORD "name", label, flags
%macro DEFWORD 2-3 0
section .rodata
align 8
word_%2:
dq LINK
%define LINK word_%2
%strlen WORD_LEN %1
db WORD_LEN | %3
db %1
align 8
$%2: dq docol
%endmacro
;; DEFCODE "name", label, flags
%macro DEFCODE 2-3 0
section .rodata
align 8
word_%2:
dq LINK
%define LINK word_%2
%strlen WORD_LEN %1
db WORD_LEN | %3
db %1
align 8
$%2: dq code_%2
section .text
align 16
code_%2:
%endmacro
;; DEFCONST "name", label, value, flags
%macro DEFCONST 3-4 0
DEFCODE %1, %2, %4
push r12
mov r12, %3
NEXT
%endmacro
;; DEFVAR "name", label, value, flags
%macro DEFVAR 2-4 0, 0
DEFCODE %1, %2, %4
push r12
mov r12, var_%2
NEXT
section .data
align 8
var_%2: dq %3
%endmacro
;; Essentials.
DEFCODE "EXIT", exit
RBPOP rsi
NEXT
DEFCODE "LIT", lit
push r12
lodsq
mov r12, rax
NEXT
DEFCODE "LITSTRING", litstring
push r12
lodsq
push rsi
mov r12, rax
add rsi, rax
add rsi, 7
and rsi, ~7
NEXT
;; Constants.
DEFCONST "VERSION", version, INDIANA_VERSION
DEFCONST "R0", rz, rstack.$
DEFCONST "LIMIT", limit, data.$
DEFCONST "DOCOL", _docol, docol
DEFCONST "F_IMMED", f_immed, F_IMMED
DEFCONST "F_HIDDEN", f_hidden, F_HIDDEN
DEFCONST "F_LENMASK", f_lenmask, F_LENMASK
DEFCONST "SYS_EXIT", sys_exit, SYS_EXIT
DEFCONST "SYS_OPEN", sys_open, SYS_OPEN
DEFCONST "SYS_CLOSE", sys_close, SYS_CLOSE
DEFCONST "SYS_READ", sys_read, SYS_READ
DEFCONST "SYS_WRITE", sys_write, SYS_WRITE
DEFCONST "O_RDONLY", o_rdonly, O_RDONLY
DEFCONST "O_WRONLY", o_wronly, O_WRONLY
DEFCONST "O_RDWR", o_rdwr, O_RDWR
DEFCONST "O_CREAT", o_creat, O_CREAT
DEFCONST "O_EXCL", o_excl, O_EXCL
DEFCONST "O_TRUNC", o_trunc, O_TRUNC
DEFCONST "O_APPEND", o_append, O_APPEND
DEFCONST "O_NONBLOCK", o_nonblock, O_NONBLOCK
;; Variables.
DEFVAR "STATE", state
DEFVAR "HERE", here, data
DEFVAR "LATEST", latest, word_last
DEFVAR "S0", sz
DEFVAR "BASE", base, 10
;; Basic stack operations.
DEFCODE "DROP", drop
pop r12
NEXT
DEFCODE "SWAP", swap
xchg r12, [rsp]
NEXT
DEFCODE "DUP", dup
push r12
NEXT
DEFCODE "OVER", over
push r12
mov r12, [rsp + 8]
NEXT
DEFCODE "ROT", rot
xchg r12, [rsp]
xchg r12, [rsp + 8]
NEXT
DEFCODE "-ROT", nrot
xchg r12, [rsp + 8]
xchg r12, [rsp]
NEXT
DEFCODE "2DROP", twodrop
pop r12
pop r12
NEXT
DEFCODE "2DUP", twodup
push r12
push qword [rsp + 8]
NEXT
DEFCODE "2SWAP", twoswap
pop r13
pop r14
pop r15
push r13
push r12
push r15
mov r12, r14
NEXT
DEFCODE "?DUP", qdup
test r12, r12
jz .else
push r12
.else:
NEXT
;; Arithmetic.
DEFCODE "1+", incr
add r12, 1
NEXT
DEFCODE "1-", decr
sub r12, 1
NEXT
DEFCODE "8+", incr8
add r12, 8
NEXT
DEFCODE "8-", decr8
sub r12, 8
NEXT
DEFCODE "+", add
pop r13
add r12, r13
NEXT
DEFCODE "-", sub
pop r13
sub r13, r12
mov r12, r13
NEXT
DEFCODE "*", mul
pop r13
imul r12, r13
NEXT
DEFCODE "/MOD", divmod
pop rax
cqo
idiv r12
push rdx
mov r12, rax
NEXT
;; Comparisons.
%macro CMP 1
xor rax, rax
pop r13
cmp r13, r12
set%+1 al
mov r12, rax
%endmacro
DEFCODE "=", equ
CMP e
NEXT
DEFCODE "<>", nequ
CMP ne
NEXT
DEFCODE "<", lt
CMP l
NEXT
DEFCODE ">", gt
CMP g
NEXT
DEFCODE "<=", le
CMP le
NEXT
DEFCODE ">=", ge
CMP ge
NEXT
%macro TEST 1
xor rax, rax
test r12, r12
set%+1 al
mov r12, rax
%endmacro
DEFCODE "0=", zequ
TEST z
NEXT
DEFCODE "0<>", znequ
TEST nz
NEXT
DEFCODE "0<", zlt
TEST l
NEXT
DEFCODE "0>", zgt
TEST g
NEXT
DEFCODE "0<=", zle
TEST le
NEXT
DEFCODE "0>=", zge
TEST ge
NEXT
;; Bitwise operations.
DEFCODE "AND", and
pop r13
and r12, r13
NEXT
DEFCODE "OR", or
pop r13
or r12, r13
NEXT
DEFCODE "XOR", xor
pop r13
xor r12, r13
NEXT
DEFCODE "INVERT", invert
not r12
NEXT
;; Memory operations.
DEFCODE "!", store
pop r13
mov [r12], r13
pop r12
NEXT
DEFCODE "@", fetch
mov r12, [r12]
NEXT
DEFCODE "+!", addstore
pop r13
add [r12], r13
pop r12
NEXT
DEFCODE "-!", substore
pop r13
sub [r12], r13
pop r12
NEXT
DEFCODE "C!", cstore
pop r13
mov [r12], r13l
pop r12
NEXT
DEFCODE "C@", cfetch
mov r12l, [r12]
movzx r12, r12l
NEXT
DEFCODE "C@C!", ccopy
mov rbx, rsi
mov rdi, r12
pop rsi
movsb
push rsi
mov r12, rdi
mov rsi, rbx
NEXT
DEFCODE "CMOVE", cmove
mov rbx, rsi
mov rcx, r12
pop rdi
pop rsi
rep movsb
pop r12
mov rsi, rbx
NEXT
;; Direct stack opreations.
DEFCODE ">R", tor
RBPUSH r12
pop r12
NEXT
DEFCODE "R>", fromr
push r12
RBPOP r12
NEXT
DEFCODE "RSP@", rspfetch
push r12
mov r12, rbp
NEXT
DEFCODE "RSP!", rspstore
mov rbp, r12
pop r12
NEXT
DEFCODE "RDROP", rdrop
add rbp, 8
NEXT
DEFCODE "DSP@", dspfetch
push r12
mov r12, rsp
NEXT
DEFCODE "DSP!", dspstore
mov rsp, r12
pop r12
NEXT
;; Input, output.
DEFCODE "KEY", key
push r12
mov rbx, rsi
call _key
mov rsi, rbx
mov r12, rax
NEXT
section .bss
alignb 4096
keybuf: resb 4096
.#: equ $ - keybuf
section .data
align 8
.@: dq keybuf
.$: dq keybuf
section .text
align 16
_key:
mov rdx, [keybuf.@]
cmp rdx, [keybuf.$]
jge .fill
xor eax, eax
mov al, [rdx]
add qword [keybuf.@], 1
ret
align 16
.fill:
SYSCALL SYS_READ, 0, keybuf, keybuf.#
test rax, rax
jbe .exit
mov rdx, keybuf
mov [keybuf.@], rdx
add rdx, rax
mov [keybuf.$], rdx
jmp _key
align 16
.exit:
SYSCALL SYS_EXIT, rax
jmp .exit
DEFCODE "EMIT", emit
push r12
mov rbx, rsi
SYSCALL SYS_WRITE, 1, rsp, 1
mov rsi, rbx
pop rax
pop r12
NEXT
DEFCODE "WORD", word
push r12
call _word
push rdi
mov r12, rcx
NEXT
section .bss
wordbuf: resb 64
section .text
align 16
_word:
call _key
cmp al, '\'
je .comment
cmp al, ' '
jbe _word
mov rdi, wordbuf
.loop:
stosb
push rdi
call _key
pop rdi
cmp al, ' '
ja .loop
mov rax, wordbuf
sub rdi, rax
mov rcx, rdi
mov rdi, rax
ret
align 16
.comment:
call _key
cmp al, `\n`
jne .comment
jmp _word
DEFCODE "NUMBER", number
mov rcx, r12
pop rdi
call _number
push rax
mov r12, rcx
NEXT
align 16
_number:
xor rax, rax
xor rbx, rbx
test rcx, rcx
jz .empty
mov rdx, [var_base]
mov bl, [rdi]
add rdi, 1
cmp bl, '-'
sete r13l
jne .parse
sub rcx, 1
jz .error
align 16
.loop:
imul rax, rdx
mov bl, [rdi]
add rdi, 1
.parse:
sub bl, '0'
jb .break
cmp bl, 10
jb .base
sub bl, 'A' - '0'
jb .break
add bl, 10
align 16
.base:
cmp bl, dl
jge .break
add rax, rbx
sub rcx, 1
jnz .loop
align 16
.break:
test r13l, r13l
jnz .negate
ret
align 16
.negate:
neg rax
ret
align 16
.error:
mov rcx, 1
ret
align 16
.empty:
ret
DEFCODE "TELL", tell
pop rax
mov rbx, rsi
SYSCALL SYS_WRITE, 1, rax, r12
mov rsi, rbx
pop r12
NEXT
DEFCODE "CHAR", char
push r12
call _word
xor r12, r12
mov r12l, [rdi]
NEXT
;; Dictionary lookup.
DEFCODE "FIND", find
mov rcx, r12
pop rdi
call _find
mov r12, rax
NEXT
align 16
_find:
mov rbx, rsi
mov rdx, var_latest
align 16
.loop:
mov rdx, [rdx]
test rdx, rdx
jz .null
xor rax, rax
mov al, [rdx + 8]
and al, F_LENMASK | F_HIDDEN
cmp al, cl
jne .loop
mov r14, rcx
mov r13, rdi
lea rsi, [rdx + 9]
repe cmpsb
mov rdi, r13
mov rcx, r14
jne .loop
mov rsi, rbx
mov rax, rdx
ret
align 16
.null:
mov rsi, rbx
xor rax, rax
ret
DEFCODE ">CFA", tcfa
mov rdi, r12
call _tcfa
mov r12, rdi
NEXT
align 16
_tcfa:
xor rax, rax
add rdi, 8
mov al, [rdi]
add rdi, 1
and al, F_LENMASK
add rdi, rax
add rdi, 7
and rdi, ~7
ret
DEFWORD ">DFA", tdfa
dq tcfa
dq incr8
dq exit
;; Compiling.
DEFCODE "CREATE", create
mov rcx, r12
pop rbx
mov rdi, [var_here]
mov rax, [var_latest]
stosq
mov al, cl
stosb
mov r15, rsi
mov rsi, rbx
rep movsb
mov rsi, r15
add rdi, 7
and rdi, ~7
mov rax, [var_here]
mov [var_latest], rax
mov [var_here], rdi
pop r12
NEXT
DEFCODE ",", comma
mov rax, r12
call _comma
pop r12
NEXT
align 16
_comma:
mov rdi, [var_here]
stosq
mov [var_here], rdi
ret
DEFCODE "[", lbrac, F_IMMED
mov qword [var_state], 0
NEXT
DEFCODE "]", rbrac
mov qword [var_state], 1
NEXT
DEFCODE "IMMEDIATE", immediate, F_IMMED
mov rdi, [var_latest]
add rdi, 8
xor byte [rdi], F_IMMED
NEXT
DEFCODE "HIDDEN", hidden
add r12, 8
xor byte [r12], F_HIDDEN
pop r12
NEXT
DEFCODE "'", tick
push r12
lodsq
mov r12, rax
NEXT
DEFWORD ":", colon
dq $word
dq create
dq lit, docol, comma
dq latest, fetch, hidden
dq rbrac
dq exit
DEFWORD ";", semicolon, F_IMMED
dq lit, exit, comma
dq latest, fetch, hidden
dq lbrac
dq exit
DEFWORD "HIDE", hide
dq $word
dq find
dq hidden
dq exit
;; Branching.
DEFCODE "BRANCH", branch
add rsi, [rsi]
NEXT
DEFCODE "0BRANCH", zbranch
test r12, r12
pop r12
jz code_branch
lodsq
NEXT
;; Interpreter.
DEFWORD "QUIT", quit
dq rz, rspstore
dq interpret
dq quit
section .data
align 8
islit: db 0
section .rodata
errmsg: db "PARSE ERROR: "
.#: equ $ - errmsg
.nl: db `\n`
DEFCODE "INTERPRET", interpret
call _word
mov qword [islit], 0
call _find
test rax, rax
jz .lit
mov rdi, rax
mov dl, [rdi + 8]
call _tcfa
and dl, F_IMMED
mov rax, rdi
jnz .exec
jmp .compile
align 16
.lit:
mov qword [islit], 1
call _number
test rcx, rcx
jnz .error
mov rbx, rax
mov rax, lit
align 16
.compile:
mov rdx, [var_state]
test rdx, rdx
jz .exec
call _comma
mov rcx, [islit]
test rcx, rcx
jnz .clit
NEXT
align 16
.clit:
mov rax, rbx
call _comma
NEXT
align 16
.exec:
mov rcx, [islit]
test rcx, rcx
jnz .elit
jmp [rax]
align 16
.elit:
push r12
mov r12, rbx
NEXT
align 16
.error:
mov rbx, rsi
SYSCALL SYS_WRITE, 2, errmsg, errmsg.#
mov rcx, [keybuf.@]
mov rdx, rcx
mov rax, keybuf
sub rdx, rax
cmp rdx, 40
jle .print
mov rdx, 40
.print:
sub rcx, rdx
SYSCALL SYS_WRITE, 2, rcx, rdx
SYSCALL SYS_WRITE, 2, errmsg.nl, 1
mov rsi, rbx
NEXT
DEFCODE "EXECUTE", execute
mov rax, r12
pop r12
jmp [rax]
DEFCODE "SYSCALL3", syscall3
pop r13
pop r14
pop r15
mov rbx, rsi
SYSCALL r12, r13, r14, r15
mov rsi, rbx
mov r12, rax
NEXT
DEFCODE "SYSCALL2", syscall2
pop r13
pop r14
mov rbx, rsi
SYSCALL r12, r13, r14
mov rsi, rbx
mov r12, rax
NEXT
DEFCODE "SYSCALL1", syscall1
pop r13
mov rbx, rsi
SYSCALL r12, r13
mov rsi, rbx
mov r12, rax
NEXT
DEFCODE "SYSCALL0", syscall0
mov rbx, rsi
SYSCALL r12
mov rsi, rbx
mov r12, rax
NEXT
DEFWORD "LAST", last, F_HIDDEN
dq exit
;; 640K ought to be enough for anybody.
section .bss
alignb 4096
data: resb 655360
.$: