X-Git-Url: https://git.rrq.au/?a=blobdiff_plain;f=compile.asm;h=fe19b203620ee3dab25f407657704c588641fe20;hb=9b8fcf87eaed58b6dfabcf885f8eef5484643de6;hp=d06913876a00feab6e6a6a2d74815cc3166b1f7c;hpb=c7022e938a1d35c0929374616a871c2caba15598;p=rrq%2Frrqforth.git

diff --git a/compile.asm b/compile.asm
index d069138..fe19b20 100644
--- a/compile.asm
+++ b/compile.asm
@@ -8,10 +8,10 @@
 	;; CREATE ( chars* n -- tfa )
 	;; Add the pstring as a new word in the current wordlist.
 	pushr rsi
-	mov rax,qword [p_wordlist_DFA] ; Current word list
-	mov rax,[rax]		; last word of current wordlist
+	mov rdx,qword [p_wordlist_DFA] ; Current word list
 	mov rbx,qword [p_here_DFA] 
-	mov [rbx],rax		; TFA of new word
+	mov rax,qword [rdx]	; set up tfa linking to previous word
+	mov qword [rbx],rax	; 
 	mov qword [rbx+16],0	; flags field
 	;; copy pname
 	pop rcx			; n
@@ -22,19 +22,18 @@
 p_create_COPY:
 	movsb
 	dec rcx
-	jge p_create_COPY
+	jg p_create_COPY
 	mov byte [rdi],0	; extra NUL
 	inc rdi
 	mov qword [rdi],rbx	; pTFA
 	add rdi,8
-	mov qword [rdi],rbx	; OFF
+	mov qword [rdi],0	; OFF
 	add rdi,8
 	mov qword [rbx+8],rdi	; pCFA
+	mov qword [rdi],dovariable ; CFA
 	add rdi,8
-	mov qword [rdi],dovalue	;CFA
-	add rdi,8
-	mov qword [rax],rbx	; Install new word
 	mov qword [p_here_DFA],rdi ; allocate the space
+	mov qword [rdx],rbx	; Install new word (rdx still wordlist ptr)
 	push rbx
 	popr rsi
 	next
@@ -43,10 +42,37 @@ p_create_COPY:
 	;; ( n -- )
 	;; Allocate n bytes on the heap
 	pop rax
-	add rax,qword [p_here_DFA]
-	mov qword [p_here_DFA],rax
+	add qword [p_here_DFA],rax
 	next
 	
+	WORD p_quote,"'",fasm
+	;; ( "word" -- cfa )
+	;; Find the following word and push its cfa, or 0
+	pushr rsi
+	DOFORTH p_stdin, p_read_word, p_find
+	cmp qword[rsp],0
+	jne p_quote_tfa
+	add rsp,16
+	mov qword[rsp],0
+	jmp p_quote_end
+p_quote_tfa:
+	mov rax,qword [rsp]
+	tfa2cfa rax
+	mov qword [rsp],rax
+p_quote_end:
+	popr rsi
+	next
+
+	WORD p_bracketed_quote,"[']",doforth,IMMEDIATE
+	;; Compilation ( "word" -- cfa )
+	;; Find the following word and push its cfa, or 0
+	dq p_literal
+	dq p_literal
+	dq p_comma
+	dq p_quote
+	dq p_comma
+	dq p_exit
+
 	WORD p_comma,',',fasm
 	;; ( v -- )
 	;; Put cell value onto the heap and advance "HERE"
@@ -67,32 +93,56 @@ p_create_COPY:
 	mov qword [p_here_DFA],rax
 	next
 
-	WORD p_does,'DOES>',fasm,IMMEDIATE
+	WORD p_does,"DOES>",fasm,IMMEDIATE
 	;; ( -- )
-	;; Change the "DOES offset" of latest compilation and assign
-	;; it the "dodoes" execution semantics, 
-	mov rax,qword [p_wordlist_DFA] 
-	mov rax,[rax]		; last word of current wordlist
+	;; Change the "DOES offset" of most recent word and assign it
+	;; the "dodoes" execution semantics that follows.
+	mov rax,qword [rsp]
+	mov rbx,rax
 	tfa2does rax		; *rax is the DOES offset field
-	;; offset = qword [p_here_DFA]) - (rax+2*8)
-	mov rbx,qword [p_here_DFA]
-	sub rbx,rax
-	sub rbx,16
-	mov qword [rax],rbx
+	tfa2dfa rbx
+	mov rcx,qword [p_here_DFA]
+	sub rcx,rbx
+	mov qword [rax],rcx ; save offset from DFA to HERE
 	mov qword [rax+8],dodoes
 	next
 
 	WORD p_literal,'LIT',fasm
 	;; ( -- v )
-	;; Push the value of successor cell onto stack, and skip it
+	;; Push the value of successor cell onto stack, and skip it.
+	;; not for interactive use!!
 	push qword [rsi]
 	add rsi,8
 	next
 
-	WORD p_literal_string,'S"',fasm
-	                              ;; " (fool emacs)
-	;; ( -- chars* n )
-	;; Push the value of successor cell onto stack, and skip it
+	WORD p_literal_string,'S"',fasm,IMMEDIATE ;; " (fool emacs)
+	;; ( -- char* n )
+	;; Save string on heap to make available at interpretation
+	;; not for interactive use!!
+	cmp qword [p_state_DFA],0
+	je p_literal_string_executing
+	pushr rsi
+	mov rdi,qword [p_here_DFA]
+	mov qword [rdi],p_literal_string
+	add rdi,8
+	mov qword [p_here_DFA],rdi
+	DOFORTH p_double_quote
+	pop rcx
+	pop rsi
+	mov rdi,qword [p_here_DFA]
+	mov qword [rdi],rcx
+	add rdi,8
+p_literal_string_copy:
+	dec rcx
+	jl p_literal_string_copied
+	movsb
+	jmp p_literal_string_copy
+p_literal_string_copied:
+	mov qword [p_here_DFA],rdi
+	popr rsi
+	next
+	
+p_literal_string_executing:
 	mov rax,qword [rsi]
 	add rsi,8
 	push rsi
@@ -100,16 +150,13 @@ p_create_COPY:
 	add rsi,rax
 	next
 
-;;; ========================================
-;;; The text interpreter
-
 	WORD p_state,'STATE',dovariable
 	;; Interpretation state (0=interpreting, 1=compiling)
 	dq 0
 
 	WORD p_left_bracket,'[',fasm,IMMEDIATE
 	;; ( -- )
-	;; Change state to interpretation state.
+	;; Change state to interpreting state.
 	mov qword[p_state_DFA],0
 	next
 
@@ -139,42 +186,56 @@ p_create_COPY:
 	pushr rsi
 	pop rcx			; ( -- chars* )
 	pop rsi			; ( -- )
-	xor rdi,rdi
+	xor rdi,rdi		; value
+	mov rbx,1		; sign (byte 0=0 means negative)
+	cmp qword [p_base_DFA],10
+	jne p_number_LOOP
+	cmp byte [rsi],'-'
+	jne p_number_LOOP
+	mov rbx,0
+	inc rsi
+	dec rcx
+	jle p_number_BAD
 p_number_LOOP:
-	dec rbx
+	dec rcx
 	jl p_number_DONE
+	xor rax,rax		; clearing
 	lodsb
-	mov bl,al		; into bl
-	cmp bl,'0'
+	cmp al,'0'
 	jl p_number_BAD
-	cmp bl,'9'
+	cmp al,'9'
 	jg p_number_ALPHA
-	sub bl,'0'
+	sub al,'0'
 p_number_CONSUME:
+	mov r8,rax
 	mov rax,rdi
-	mul qword [p_base_DFA]
-	add rax,rbx
+	mul qword [p_base_DFA]	; uses rdx:rax
+	add rax,r8
 	mov rdi,rax
 	jmp p_number_LOOP
 p_number_ALPHA:
-	cmp bl,'A'
+	cmp al,'A'
 	jl p_number_BAD
-	cmp bl,'Z'
+	cmp al,'Z'
 	jg p_number_alpha
-	sub bl,'A'-10
+	sub al,'A'-10
 	jmp p_number_CONSUME
 p_number_alpha:
-	cmp bl,'a'
+	cmp al,'a'
 	jl p_number_BAD
-	cmp bl,'z'
+	cmp al,'z'
 	jg p_number_BAD
-	sub bl,'a'-10
+	sub al,'a'-10
 	jmp p_number_CONSUME
 p_number_BAD:
 	push qword 0
 	popr rsi
 	next
 p_number_DONE:
+	cmp rbx,0
+	jne p_numper_POSITIVE
+	neg rdi
+p_numper_POSITIVE:
 	push rdi
 	push qword 1
 	popr rsi
@@ -184,30 +245,120 @@ p_number_DONE:
 	dq 0,0 			; ( n chars* )
 
 	WORD p_evaluate_stream,'EVALUATE-STREAM'
-	;; ( stream -- *?* flag )
+	;; ( stream* -- *?* flag )
 	;; Execute the words from the given stream
 	;; returns 1 if stream ends and 0 if an unknown word is found
+	dq p_gtR		; Keep the stream on the return stack.
+p_evaluate_stream_PROMPT:
+	dq p_verboseQ
+	dq p_get
+	BRANCH 0,p_evaluate_stream_LOOP
+	dq p_depth
+	dq p_dot
+	dq p_literal_string
+	STRING '> '
+	dq p_tell
+	dq p_Rget
+	dq p_clear_stream
 p_evaluate_stream_LOOP:
-	dq p_read_word		; ( -- chars* n )
+	dq p_Rget
+	dq p_read_word
 	dq p_dup
-	BRANCH 0,p_evaluate_stream_END
-	dq p_2dup		; ( -- chars* n chars* n )
-	dq p_this_word		; ( -- chars* n chars* n p )
-	dq p_2put		; ( -- chars* n )
-	dq p_find		; ( -- [ chars* n 0 ]/[ tfa ] )
-	dq p_dup		; ( -- [ chars* n 0 0 ]/[ tfa tfa ] )
-	BRANCH 0,p_evaluate_stream_NOTWORD ; ( -- chars* n tfa/0 )
-	dq p_execute		; ( -- chars* n tfa/0 )
-	BRANCH ,p_evaluate_stream_LOOP
+	BRANCH 0,p_evaluate_stream_END ; branch if 0 on TOP
+	dq p_2dup
+	dq p_this_word
+	dq p_2put
+	dq p_find
+	dq p_dup
+	BRANCH 0,p_evaluate_stream_NOTWORD ; branch if 0 on TOP
+	dq p_state
+	dq p_get
+	BRANCH 0,p_evaluate_stream_INTERPRET
+	dq p_dup
+	dq p_tfa2flags_get
+	dq p_literal, 1 ; the immediate bit
+	dq p_and
+	BRANCH 0,p_evaluate_stream_COMPILE
+p_evaluate_stream_INTERPRET:
+	dq p_tfa2cfa
+	dq p_execute
+	BRANCH ,p_evaluate_stream_AFTER
+p_evaluate_stream_COMPILE:
+	dq p_tfa2cfa
+	dq p_comma
+	BRANCH ,p_evaluate_stream_AFTER
 p_evaluate_stream_NOTWORD:
-	dq p_drop		; ( -- chars* n )
-	dq p_number		; ( -- [ 0 ]/[ v 1 ] )
+	dq p_drop
+	dq p_number
 	dq p_dup
-	BRANCH 0,p_evaluate_stream_BAD
+	BRANCH 0,p_evaluate_stream_BAD ; branch if 0
 	dq p_drop
+	dq p_state
+	dq p_get
+	BRANCH 0,p_evaluate_stream_AFTER ; branch if 0
+	dq p_literal, p_literal
+	dq p_comma, p_comma
+p_evaluate_stream_AFTER:
+	dq p_Rget
+	dq p_stream_nchars
+	BRANCH 0,p_evaluate_stream_PROMPT
 	BRANCH ,p_evaluate_stream_LOOP
 p_evaluate_stream_END:
-	dq p_literal
-	dq 1
+	dq p_2drop
+	dq p_literal, 1
 p_evaluate_stream_BAD:
+	dq p_Rgt
+	dq p_drop
+	dq p_exit
+
+	WORD p_colon,':'
+	;; ( -- )
+	;; Read next word as a new word into current wordlist, set it
+	;; to be a doforth word, and set compiling mode.
+	dq p_literal, doforth
+	dq p_stdin
+	dq p_read_word
+	dq p_create
+	dq p_tfa2cfa
+	dq p_put
+	dq p_right_bracket
+	dq p_exit
+
+	WORD p_semicolon,';',,IMMEDIATE
+	;; ( -- )
+	;; Lay out p_exit, and set interpreting mode
+	dq p_left_bracket
+	dq p_literal, p_exit
+	dq p_comma
+	dq p_left_bracket
+	dq p_exit
+
+	WORD p_immediate,'IMMEDIATE',fasm,IMMEDIATE
+	;; ( -- )
+	;; Set "immediate flag" of the word being defined
+	mov rax,qword [p_wordlist_DFA]
+	mov rax,qword [rax]	; tfa of most recent word
+	mov qword [rax+16],1	; set the flags field to 1
+	next
+
+	WORD p_open_file_quote,'OPEN-FILE"'
+	;; ( "name" -- fd )
+	dq p_double_quote
+	dq p_create
+	dq p_tfa2namez
+	dq p_literal,0
+	dq p_literal,0
+	dq sys_open
+	dq p_exit
+
+	WORD p_load_file_quote,'LOAD-FILE"'
+	;; ( "name" -- )
+	;; Create a word for the nominated file for a stream to,
+	;; and store that stream pointer, then invoke evaluate-stream
+	dq p_open_file_quote ; fd
+	dq p_literal, 15000 ; buffer size
+	dq p_stream
+	dq p_dup
+	dq p_comma
+	dq p_evaluate_stream
 	dq p_exit