Translated improvement into hex2 version of stage1_assembler-2
This commit is contained in:
Jeremiah Orians
parent
7fc352944d
commit
cdea34fa4f
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@ -3,6 +3,7 @@
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# ;; We will be using R14 for our condition codes
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2D2F7fff # LOADUI R15 0x7FFF ; We will be using R15 for our stack
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# ;; Main program functionality
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# ;; Reads in Tape_01 and writes out results onto Tape_02
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# ;; Accepts no arguments and HALTS when done
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@ -36,6 +37,7 @@
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42100002 # FCLOSE
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FFFFFFFF # HALT
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# ;; First pass function
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# ;; Reads Tape_01 and creates our label table
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# ;; Will Overwrite R0 R10 R11
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@ -46,14 +48,19 @@ FFFFFFFF # HALT
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# ;; Check for EOF
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A0100000 # CMPSKIP.GE R0 0
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0D01001F # RET R15
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# ;; Check for and deal with label
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# ;; Check for and deal with label (:)
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A030003a # CMPSKIP.NE R0 58
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3C00 @storeLabel # JUMP @storeLabel
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# ;; Check for and deal with pointers to labels
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# ;; Starting with (@)
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A0300040 # CMPSKIP.NE R0 64
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3C00 @ThrowAwayPointer # JUMP @ThrowAwayPointer
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# ;; Then dealing with ($)
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A0300024 # CMPSKIP.NE R0 36
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3C00 @ThrowAwayPointer # JUMP @ThrowAwayPointer
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# ;; Now check for absolute addresses (&)
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A0300026 # CMPSKIP.NE R0 38
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3C00 @ThrowAwayAddress # JUMP @ThrowAwayAddress
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# ;; Otherwise attempt to process
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2D0F @hex # CALLI R15 @hex ; Convert it
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A0100000 # CMPSKIP.GE R0 0 ; Don't record, nonhex values
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@ -69,6 +76,7 @@ A0100000 # CMPSKIP.GE R0 0 ; Don't record, nonhex values
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0FBB0001 # ADDUI R11 R11 1 ; increment PC now that that we have a full byte
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3C00 @first_pass # JUMP @first_pass
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# ;; Second pass function
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# ;; Reads from Tape_01 and uses the values in the table
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# ;; To write desired contents onto Tape_02
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@ -88,6 +96,8 @@ A0300040 # CMPSKIP.NE R0 64 ; @ for relative
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3C00 @StoreRelativePointer # JUMP @StoreRelativePointer
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A0300024 # CMPSKIP.NE R0 36 ; $ for absolute
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3C00 @StoreAbsolutePointer # JUMP @StoreAbsolutePointer
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A0300026 # CMPSKIP.NE R0 38 ; & for address
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3C00 @StoreAbsoluteAddress # JUMP @StoreAbsoluteAddress
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# ;; Process everything else
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2D0F @hex # CALLI R15 @hex ; Attempt to Convert it
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A0100000 # CMPSKIP.GE R0 0 ; Don't record, nonhex values
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@ -109,6 +119,7 @@ A0100000 # CMPSKIP.GE R0 0 ; Don't record, nonhex values
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0FBB0001 # ADDUI R11 R11 1 ; increment PC now that that we have a full byte
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3C00 @second_pass # JUMP @second_pass
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# ;; Store Label function
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# ;; Writes out the token and the current PC value
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# ;; Its static variable for storing the next index to be used
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@ -132,6 +143,7 @@ A0300000 # CMPSKIP.NE R0 0 ; If zero intialize from R13
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:current_index
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00000000 # NOP
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# ;; StoreRelativepointer function
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# ;; Deals with the special case of relative pointers
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# ;; Clears Temp
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@ -153,6 +165,7 @@ A0300000 # CMPSKIP.NE R0 0 ; If zero intialize from R13
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2D0F @ProcessImmediate # CALLI R15 @ProcessImmediate ; Write out the value
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3C00 @second_pass # JUMP @second_pass
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# ;; StoreAbsolutepointer function
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# ;; Deals with the special case of absolute pointers
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# ;; Clears Temp
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@ -172,6 +185,34 @@ A0300000 # CMPSKIP.NE R0 0 ; If zero intialize from R13
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2D0F @ProcessImmediate # CALLI R15 @ProcessImmediate ; Write out the value
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3C00 @second_pass # JUMP @second_pass
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# ;; StoreAbsoluteAddress function
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# ;; Deal with the special case of absolute Addresses
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# ;; Clear Temp
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# ;; Stores string in Temp
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# ;; Finds match in Table
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# ;; Writes out the full absolute address [32 bit machine]
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# ;; Modifies R0 R11
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# ;; Jumpbacs back into Pass2
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:StoreAbsoluteAddress
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# ;; COrrect the PC to reflect the size of the address
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0FBB0004 # ADDUI R11 R11 4 ; 4 Bytes on 32bit machines
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2D20 $Temp # LOADUI R0 $Temp ; Set where we ant to shove our string
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2D0F @Clear_string # CALLI R15 @Clear_string ; Clear it
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2D0F @writeout_token # CALLI R15 @writeout_token ; Write it
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2D0F @Match_string # CALLI R15 @Match_string ; Find the Match
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090200EF # PUSHR R14 R15 ; Get a temp storage place
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18E0fffc # LOAD32 R14 R0 -4 ; Get the value we care about
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0900040E # COPY R0 R14 ; We need to print the top 2 bytes first
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2D400010 # SARI R0 16 ; Drop bottom 16 bits
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2D0F @ProcessImmediate # CALLI R15 @ProcessImmediate ; Write out top 2 bytes
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2D20ffff # LOADUI R0 0xFFFF ; Provide mask to keep bottom 2 bytes
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0502000E # AND R0 R0 R14 ; Drop top 16 bits
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090280EF # POPR R14 R15 ; Restore R14
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2D0F @ProcessImmediate # CALLI R15 @ProcessImmediate ; Write out bottom 2 bytes
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3C00 @second_pass # JUMP @second_pass
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# ;; Writeout Token Function
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# ;; Writes the Token [minus first char] to the address
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# ;; It recieves in R0 until it reaches a delimiter
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@ -208,6 +249,7 @@ A030000a # CMPSKIP.NE R0 10 ; Finished if newline
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# ;; And be done
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0D01001F # RET R15
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# ;; Clear string function
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# ;; Clears string pointed at by the value of R0
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# ;; Until a null character is reached
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@ -236,6 +278,7 @@ A030000a # CMPSKIP.NE R0 10 ; Finished if newline
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0902800F # POPR R0 R15
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0D01001F # RET R15
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# ;; Match string function
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# ;; Walks down table until match is found
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# ;; Then returns address of matching string in R0
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@ -265,6 +308,7 @@ A030000a # CMPSKIP.NE R0 10 ; Finished if newline
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0902801F # POPR R1 R15
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0D01001F # RET R15
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# ;; Our simple string compare function
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# ;; Recieves two pointers in R0 and R1
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# ;; Returns the difference between the strings in R0
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@ -294,6 +338,7 @@ A0200000 # CMPSKIP.E R0 0 ; Stop if byte is NULL
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0902802F # POPR R2 R15
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0D01001F # RET R15
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# ;; Processimmediate Function
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# ;; Recieves an integer value in R0
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# ;; Writes out the values to Tape_02
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@ -322,6 +367,7 @@ A0200000 # CMPSKIP.E R0 0 ; Stop if byte is NULL
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# ;; Be Done
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0D01001F # RET R15
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# ;; ThrowAwaypointer function
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# ;; Handle the special case of a generic problem
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# ;; for Pass1, Will update R11 and modify R0
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@ -332,6 +378,18 @@ A0200000 # CMPSKIP.E R0 0 ; Stop if byte is NULL
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2D0F @throwAwayToken # CALLI R15 @throwAwayToken ; Get rid of rest of token
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3C00 @first_pass # JUMP @first_pass ; Then return to the proper place
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# ;; ThrowAwayAddress function
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# ;; Handle the case of a 32bit absolute address storage
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# ;; for Pass1, Will update R11 and modify R0
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# ;; Will return to the start of first_pass
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# ;; Never call this function, conly jump to it
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:ThrowAwayAddress
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0FBB0004 # ADDUI R11 R11 4 ; Addresses on 32bit systems take up 4 bytes
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2D0F @throwAwayToken # CALLI R15 @throwAwayToken ; Get rid of rest of token
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3C00 @first_pass # JUMP @first_pass ; Then return to the proper place
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# ;; ThrowAwaylabel function
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# ;; Handle the special case of a generic problem
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# ;; for Pass2, Will update R11 and modify R0
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@ -414,6 +472,7 @@ A030000a # CMPSKIP.NE R0 10
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2C6E @ascii_comment # JUMP.NE R14 @ascii_comment ; Otherwise keep looping
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3C00 @ascii_other # JUMP @ascii_other
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# ;; Where we are storing our Temp
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:Temp
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00000000 # NOP
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@ -433,5 +492,6 @@ A030000a # CMPSKIP.NE R0 10
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00000000 # NOP
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00000000 # NOP
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# ;; Where we will putting our Table
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:table
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