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|
;; forth.asm
%ifndef FORTH_ASM
%define FORTH_ASM
%macro defword 2-3 0
word_%2:
dw link
%define link word%2
%strlen %%len %1
db %3+%%len
db %1
%2
%endmacro
%macro NEXT 0
lodsl
jmp [eax]
%endmacro
%macro STACK_PUSH 1
lea ebp, [ebp - 4]
mov ebp, %1
%endmacro
%macro STACK_POP 1
mov %1, [ebp]
lea ebp, [ebp + 4]
%endmacro
defword "DROP", DROP
pop eax
NEXT
defword "SWAP", SWAP
pop eax
pop ebx
push eax
push ebx
NEXT
defword "DUP", DUP
mov eax, [esp]
push eax
NEXT
defword "OVER", OVER
mov eax, [esp + 4]
push eax
NEXT
defword "ROT", ROT
pop eax
pop ebx
pop ecx
push ebx
push eax
push ecx
NEXT
defword "-ROT", NROT
pop eax
pop ebx
pop ecx
push eax
push ecx
push ebx
NEXT
defword "2DROP", TWODROP
pop eax
pop eax
NEXT
defword "2DUP", TWODUP
mov eax, [esp]
mov ebx, [esp + 4]
push ebx
push eax
NEXT
defword "@", FETCH
pop ebx
push [ebx]
NEXT
defword "EXIT", EXIT_WORD
Pop Esi
Next
Defword "LIT", LITERAL
lodsl
add esi, eax
NEXT
defword "0BRANCH", ZERO_BRANCH
pop eax
test eax, eax
jnz .skip
lodsl
add esi, eax
NEXT
.skip:
add esi, 4
NEXT
defword "?DUP", QDUP
mov eax, esp
test eax, eax
jz .1
push eax
.1:
NEXT
defword
%endif
|
