Started to implement M0-macro in assembly
This commit is contained in:
Jeremiah Orians
parent
1a32cfa8c9
commit
25f68d8af8
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@ -7,7 +7,6 @@
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FILE* source_file;
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bool Reached_EOF;
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uint32_t ip;
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struct Token
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{
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@ -300,7 +299,6 @@ int main(int argc, char **argv)
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source_file = fopen(argv[1], "r");
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Reached_EOF = false;
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ip = 0;
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struct Token* head = NULL;
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while(!Reached_EOF)
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{
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@ -0,0 +1,156 @@
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:start
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;; We will be using R13 for storage of Head
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;; We will be using R14 for our condition codes
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LOADUI R15 $stack ; Put stack at end of program
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;; Main program
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;; Reads contents of Tape_01 and applies all Definitions
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;; Writes results to Tape_02
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;; Accepts no arguments and HALTS when done
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:main
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;; Prep TAPE_01
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LOADUI R0 0x1100
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FOPEN_READ
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FALSE R0 ; Head is NULL
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LOADUI R0 0x1100 ; Read Tape_01
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FALSE R14 ; We haven't yet reached EOF
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:main_0
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CALLI R15 @Tokenize_Line ; Call Tokenize_Line
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JUMP.Z R14 @main_0 ; Until we reach EOF
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;; Done reading File
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LOADUI R0 0x1100 ; Close TAPE_01
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FCLOSE
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CALLI R15 @Identify_Macros ; Tag all nodes that are macros
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CALLI R15 @Line_Macro ; Apply macros down nodes
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CALLI R15 @Process_String ; Convert string values to Hex16
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CALLI R15 @Eval_Immediates ; Convert numbers to hex
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CALLI R15 @Preserve_Other ; Ensure labels/Pointers aren't lost
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CALLI R15 @Print_Hex ; Write Nodes to Tape_02
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HALT ; We are Done
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;; Primative malloc function
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;; Recieves number of bytes to allocate in R0
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;; Returns pointer to block of that size in R0
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;; Returns to whatever called it
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:malloc
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;; Preserve registers
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PUSHR R1 R15
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;; Get current malloc pointer
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LOADR R1 @malloc_pointer
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;; Deal with special case
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CMPSKIP.NE R1 0 ; If Zero set to our start of heap space
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LOADUI R1 0x4000
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;; update malloc pointer
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SWAP R0 R1
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ADD R1 R0 R1
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STORER R1 @malloc_pointer
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;; Done
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;; Restore registers
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POPR R1 R15
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RET R15
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;; Our static value for malloc pointer
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:malloc_pointer
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NOP
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;; Tokenize_Line function
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;; Recieves pointer to Head in R0 and desired input in R1
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;; Alters R14 when EOF Reached
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;; Returns to whatever called it
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:Tokenize_Line
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;; Preserve registers
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PUSHR R0 R15
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PUSHR R1 R15
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PUSHR R2 R15
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PUSHR R3 R15
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PUSHR R4 R15
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;; Initialize
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MOVE R4 R0 ; Get Head pointer out of the way
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:Tokenize_Line_0
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FGETC ; Get a Char
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;; Deal with lines comments starting with #
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CMPSKIP.NE R0 35
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JUMP @Purge_Line_Comment
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;; Deal with Line comments starting with ;
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CMPSKIP.NE R0 59
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JUMP @Purge_Line_Comment
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;; Deal with Tab
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CMPSKIP.NE R0 9
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JUMP @Tokenize_Line_0 ; Throw away byte and try again
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;; Deal with New line
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CMPSKIP.NE R0 10
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JUMP @Tokenize_Line_0 ; Throw away byte and try again
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;; Deal with space characters
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CMPSKIP.NE R0 32
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JUMP @Tokenize_Line_0 ; Throw away byte and try again
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;; Flag if reached EOF
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CMPSKIP.GE R0 0
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TRUE R14
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;; Stop if EOF
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CMPSKIP.GE R0 0
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JUMP @Tokenize_Line_Done
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;; Allocate a new Node
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MOVE R2 R0 ; Get Char out the way
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LOADUI R0 16 ; Allocate 16 Bytes
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CALLI R15 @malloc ; Get address of new Node
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SWAP R2 R0 ; Store Pointer in R2
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;; Deal with Strings wrapped in "
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CMPSKIP.NE R0 34
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JUMP @Store_String
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;; Deal with Strings wrapped in '
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CMPSKIP.NE R0 39
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JUMP @Store_String
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;; Everything else is an atom store it
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CALLI R15 @Store_Atom
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:Tokenize_Line_Done
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CALLI R15 @Add_Token ; Append new token to Head
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;; Restore registers
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POPR R4 R15
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POPR R3 R15
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POPR R2 R15
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POPR R1 R15
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POPR R0 R15
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;; Return since we are done
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RET R15
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;; Purge_Line_Comment Function
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;; Recieves char in R0 and desired input in R1
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;; Modifies R0
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;; Returns to Tokenize_Line as if the entire line
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;; Comment never existed
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:Purge_Line_Comment
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FGETC ; Get another Char
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CMPSKIP.E R0 10 ; Stop When LF is reached
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JUMP @Purge_Line_Comment ; Otherwise keep looping
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JUMP @Tokenize_Line_0 ; Return as if this never happened
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;; Store_String function
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;; Recieves Char in R0, desired input in R1
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;; And node pointer in R2
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;; Where we are putting the start of our stack
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:stack
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