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Added several more important forth functions

This commit is contained in:
Jeremiah Orians 2016-10-29 21:36:22 -04:00
parent 07fe743b2f
commit 2716530746
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1 changed files with 122 additions and 1 deletions
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stage2/forth.s
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@ -45,6 +45,14 @@
ADDUI R13 R13 4 ; Increment Next
JSR_COROUTINE R12 ; Jump to next thing
;; DOCOL Function
;; The Interpreter for DO COLON
;; Jumps to NEXT
:DOCOL
PUSHR R13 R15 ; Push NEXT onto Return Stack
ADDUI R13 R12 4 ; Update NEXT to point to the instruction after itself
JUMP @NEXT ; Use NEXT
;; Some Forth primatives
;; Drop
@ -653,6 +661,10 @@
&Emit_Entry ; Pointer to Emit
&Word_Text ; Pointer to Name
NOP ; Flags
CALLI R15 @Word_Direct ; Trick for direct calls
JSR_COROUTINE R11 ; NEXT
:Word_Direct
COPY R1 R7 ; Using designated IO
FALSE R2 ; Starting at index 0
@ -696,7 +708,7 @@
CMPSKIPI.LE R2 0 ; If number of bytes is greater than 0
ADDUI R2 R2 1 ; Add a null to end of string
ADD R8 R8 R2 ; Update HEAP pointer
JSR_COROUTINE R11 ; NEXT
RET R15
;; NUMBER
:Number_Text
@ -819,5 +831,114 @@
PUSHR R3 R14 ; Push pointer or Zero onto parameter stack
JSR_COROUTINE R11 ; NEXT
;; >CFA
:TCFA_Text
">CFA"
:TCFA_Entry
&Find_Entry ; Pointer to Find
&TCFA_Text ; Pointer to Name
NOP ; Flags
POPR R0 R14 ; Get Node pointer
ADDUI R0 R0 12 ; Move to CFA
PUSHR R0 R14 ; Push the result
JSR_COROUTINE R11 ; NEXT
;; >DFA
:TDFA_Text
">DFA"
:TDFA_Entry
&TCFA_Entry ; Pointer to >CFA
&TDFA_Text ; Pointer to Name
NOP ; Flags
POPR R0 R14 ; Get Node pointer
ADDUI R0 R0 16 ; Move to DFA
PUSHR R0 R14 ; Push the result
JSR_COROUTINE R11 ; NEXT
;; CREATE
:Create_Text
"CREATE"
:Create_Entry
&TDFA_Entry ; Pointer to >DFA
&Create_Text ; Pointer to Name
NOP ; Flags
COPY R0 R8 ; Preserve HERE for next LATEST
PUSHR R9 R8 ; Store LATEST onto HEAP
POPR R1 R14 ; Get pointer to string
PUSHR R1 R8 ; Store string pointer onto HEAP
FALSE R1 ; Prepare NOP for Flag
PUSHR R1 R8 ; Push NOP Flag
MOVE R0 R9 ; Set LATEST
JSR_COROUTINE R11 ; NEXT
;; DEFINE
:Define_Text
"DEFINE"
:Define_Entry
&Create_Entry ; Pointer to Create
&Define_Text ; Pointer to Name
NOP ; Flags
CALLI R15 @Word_Direct ; Get Word
COPY R0 R8 ; Preserve HERE for next LATEST
PUSHR R9 R8 ; Store LATEST onto HEAP
POPR R1 R14 ; Get pointer to string
PUSHR R1 R8 ; Store string pointer onto HEAP
TRUE R1 ; Prepare HIDDEN for Flag
PUSHR R1 R8 ; Push HIDDEN Flag
LOADR R1 @Define_DOCOL ; Get address of DOCOL
PUSHR R1 R8 ; Push DOCOL Address onto HEAP
MOVE R9 R0 ; Set LATEST
LOADUI R10 1 ; Set STATE to Compile Mode
LOADUI R0 $EXIT ; Load pointer to EXIT
JSR_COROUTINE R0 ; EXIT
:Define_DOCOL
&DOCOL ; Store the address of DOCOL
;; COMA
:Comma_Text
","
:Comma_Entry
&Define_Entry ; Pointer to DEFINE
&Comma_Text ; Pointer to Name
NOP ; Flags
POPR R0 R14 ; Get top of parameter stack
PUSHR R0 R8 ; Push onto HEAP and increment HEAP pointer
JSR_COROUTINE R11 ; NEXT
;; [
:LBRAC_Text
"["
:LBRAC_Entry
&Comma_Entry ; Pointer to Comma
&LBRAC_Text ; Pointer to Name
NOP ; Flags
FALSE R10 ; Set STATE to Interpret Mode
JSR_COROUTINE R11 ; NEXT
;; ]
:RBRAC_Text
"]"
:RBRACK_Entry
&LBRAC_Entry ; Pointer to LBRAC
&RBRAC_Text ; Pointer to Name
NOP ; Flags
LOADUI R10 1 ; Set State to Compile Mode
JSR_COROUTINE R11 ; NEXT
;; ;
:SEMICOLON_Text
";"
:SEMICOLON_Entry
&RBRACK_Entry ; Pointer to RBRAC
&SEMICOLON_Text ; Pointer to Name
NOP ; Flags
LOADUI R0 $EXIT ; Get EXIT Pointer
PUSHR R0 R8 ; Push EXIT onto HEAP and increment HEAP pointer
FALSE R0 ; Prep NULL for Flag
STORE R0 R9 8 ; Set Flag
FALSE R10 ; Set State to Interpret Mode
LOADUI R0 $EXIT ; Load pointer to EXIT
JSR_COROUTINE R0 ; EXIT
:cold_start
;;