;;; Dynamic memory management. Allocated with MALLOC and released with
;;; MUNMAP (see below)
- ;; ( size -- addr )
- ;; Allocates memory (using brk)
WORD p_malloc,'MALLOC',fasm
+ ;; ( size -- addr )
+ ;; Allocates memory (using mmap)
pushr rsi ; pretend it's a FORTH word since it
; ends via sys_mmap_asm
pop rax
push qword 0 ; address of mapping (suggestion)
push rax ; length of mapping
push qword 3 ; protection mode PROT_READ | PROT_WRITE
- push qword 8226 ; flags PRIVATE | ANONYMOUS | LOCKED
+ push qword 34 ; flags PRIVATE | ANONYMOUS
push qword -1 ; fd -1
push qword 0 ; offset
jmp sys_mmap_asm ; exit via sys_mmap
+ WORD p_realloc,'REALLOC',fasm
+ ;; ( addr old new -- )
+ ;; Try remapping a given MMAP region of old size to a new size
+ ;; mremap(void *old_address, size_t old_size,
+ ;; size_t new_size, int flags, ... /* void *new_address */);
+ pushr rsi
+ push 1 ; MREMAP_MAYMOVE
+ jmp sys_mmap_asm ; exit via sys_mmap
+
;;; ========================================
;;; Input stream handling.
;;;
push rax
jmp exit
+ WORD p_unstream,'UNSTREAM',fasm
+ ;; ( stream -- )
+ ;; Release mmap-ed memory
+ pushr rsi
+ mov rax,qword [rsp]
+ mov rbx,qword [rax+8]
+ cmp rbx,0
+ jl p_unstream_incore
+ ;; unstream fd stream
+ push rbx
+ DOFORTH sys_close
+ pop rax
+ mov rax,qword [rsp]
+ push qword [rax+16]
+ add qword [rax+16],32
+ DOFORTH sys_munmap
+ pop rax
+ popr rsi
+ next
+p_unstream_incore:
+ mov rbx,qword [rax+16]
+ mov rax,qword [rax]
+ mov qword [rsp],rax
+ push rbx
+ DOFORTH sys_munmap
+ pop rax
+ popr rsi
+ next
+
WORD p_clear_stream,'CLEAR-STREAM',fasm
;; ( stream -- )
- ;; Clear buffer of input stream
+ ;; "Clear" the stream by moving its "current position" to the
+ ;; "fill position".
pop rax
mov rbx,qword [rax+16] ; copy fill
mov qword [rax+24],rbx ; into current
;; Read next word from the given stream into the PAD
pushr rsi
pop rax
+ pushr rax ; the stream
push qword p_pad_DFA
push qword 0
- push rax
p_read_word_skipblanks:
- FORTH
- dq p_dup
- dq p_read_stream_char
- ENDFORTH
+ DOFORTH p_Rget, p_read_stream_char
pop rbx
cmp bl,0
jl p_read_word_nomore
cmp bl,' '
jle p_read_word_skipblanks
-
+ cmp bl,'#'
+ je p_read_word_skipline
p_read_word_readword:
- ;; ( buffer length stream )
- mov rax,qword [rsp+16]
- mov rcx,qword [rsp+8]
+ ;; ( buffer length )
+ mov rax,qword [rsp+8]
+ mov rcx,qword [rsp]
mov [rax+rcx],bl
- inc qword [rsp+8]
- FORTH
- dq p_dup
- dq p_read_stream_char
- ENDFORTH
+ inc qword [rsp]
+ DOFORTH p_Rget, p_read_stream_char ; ( -- buffer length char )
pop rbx
cmp bl,0
jl p_read_word_nomore
jg p_read_word_readword
p_read_word_nomore:
- pop rax
+ xor rbx,rbx
+ mov rax,qword [rsp+8]
+ mov rcx,qword [rsp]
+ mov [rax+rcx],bl ; add NUL ending
+ inc qword [rsp]
+ DOFORTH p_str2temp
+ dec qword [rsp]
+ popr rax
popr rsi
next
+p_read_word_skipline:
+ DOFORTH p_Rget, p_read_stream_char
+ pop rbx
+ cmp bl,0
+ jl p_read_word_nomore
+ cmp bl,10 ; newline
+ je p_read_word_skipblanks
+ jmp p_read_word_skipline
+
WORD p_double_quote,'"',fasm ;; " (fool emacs)
;; ( -- char* n )
- ;; Scan to double quote in stream buffer, putting the string on PAD
+ ;; Scan to double quote in stream buffer, putting the string
+ ;; on PAD, plus an extra NUL, then copy that into a new temp
+ ;; object, but exclude the NUL from the returned count, n.
pushr rsi
push p_pad_DFA
push 0
p_double_quote_loop:
- DOFORTH p_stdin, p_read_stream_char
+ DOFORTH p_input, p_get, p_read_stream_char
pop rax
cmp rax,0
jl p_double_quote_endstream
jmp p_double_quote_loop
p_double_quote_endquote:
p_double_quote_endstream:
+ lea rdi,[p_pad_DFA]
+ add rdi,qword [rsp]
+ mov byte [rdi],0
+ ;; copy PAD string + NUL into new temp object
+ inc qword [rsp]
+ DOFORTH p_str2temp
+ dec qword [rsp]
popr rsi
next
- WORD p_tell,'TELL',fasm
+ WORD p_fdtell,'FDTELL',
+ ;; ( chars* n fd -- )
+ ;; Write n bytes from chars* to fd
+ dq p_rot, p_rot, sys_write, p_drop, p_return
+
+ WORD p_tell,'TELL'
;; ( chars* n -- )
;; Write n bytes from chars* to stdout
- pushr rsi
- pop rbx
- pop rax
- push 1
- push rax
- push rbx
- DOFORTH sys_write
- pop rax
- popr rsi
- next
+ dq p_literal,1,p_fdtell, p_return
- WORD p_emit,'EMIT',fasm
+ WORD p_fdemit,'FDEMIT'
+ ;; ( c fd -- )
+ ;; Write byte to fd
+ dq p_literal,1, p_dsp, p_literal,1, sys_write, p_2drop, p_return
+
+ WORD p_emit,'EMIT'
;; ( c -- )
;; Write byte to stdout
- pushr rsi
- mov rax,rsp
- push 1
- push rax
- push 1
- DOFORTH sys_write
- pop rax ; ignore return value
- pop rax ; drop input data
- popr rsi
- next
+ dq p_literal,1, p_fdemit, p_return
WORD p_nl,'NL',dovalue
;; ( -- c )
WORD p_sp,'SP',dovalue
;; ( -- c )
;; Pushes a space character on the stack
- dq 10
+ dq 32
WORD p_digits,'DIGITS',dovariable
db '0123456789abcdef'
- WORD p_dot,'.',fasm
+ WORD p_dot_temp,'.TEMP',fasm
;; ( v -- )
;; Print TOP value as unsigned BASE integer
pushr rsi
- mov rax,qword [rsp]
+ mov rdi,p_pad_DFA
+ pop rax
cmp rax,0
jge p_dot_positive
cmp qword [p_base_DFA],10
jne p_dot_positive
- push '-'
- DOFORTH p_emit
- mov rax,qword [rsp]
+ mov byte[rdi],'-'
+ inc rdi
neg rax
p_dot_positive:
+ call p_dot_pad_subr
+ xor rax,rax
+ stosb
+ push p_pad_DFA
+ sub rdi,p_pad_DFA
+ push rdi
+ DOFORTH p_str2temp
+ dec qword [rsp] ; don't count the ending NUL
+ popr rsi
+ next
+
+p_dot_pad_subr: ;
xor rdx,rdx
div qword [p_base_DFA] ; rdx:rax / BASE => q=rax, r=rdx
- mov qword [rsp],rdx
cmp rax,0
je p_dot_remainder
- push rax
- DOFORTH p_dot
-p_dot_remainder:
+ push rdx
+ call p_dot_pad_subr
pop rdx
+p_dot_remainder:
xor rax,rax
mov al,[p_digits_DFA+rdx]
- push rax
- DOFORTH p_emit
- popr rsi
- next
+ stosb
+ ret
+
+ WORD p_dot,'.'
+ ;; ( v -- )
+ ;; Print value to stdout
+ dq p_dot_temp, p_literal,1, p_fdtell, p_return
projects / rrq / rrqforth.git / blobdiff