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Hex1 assembler optimization to reduce size and number of clock cycles 

required to process input
This commit is contained in:
Jeremiah Orians 2017-12-17 21:29:35 -05:00
parent 0ad7d92437
commit 0805284391
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6 changed files with 207 additions and 513 deletions
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2
CHANGELOG.org
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@ -21,6 +21,7 @@ Added program to search for unusual characters that are not human detectable
** Changed
Expanded stage0 web IDE to include the PC and instruction counter
Performance tuned hex1 to reduce both size and instruction count
** Fixed
Fixed behavior of R@ thanks to reepca
@ -31,6 +32,7 @@ Fixed output of large negative numbers in hex
** Removed
Removed stage1_assembler-0's need for Memory and reduced size of program while at it
Removed stage1_assembler-1's hex1 implementation as it ended up being useless in bootstrapping
* 0.0.9 - 2017-08-17
** Added

2
bootstrapping Steps.org
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@ -93,7 +93,7 @@ So we are going to limit ourselves to single character labels and pointers (:a a
To build our improved hex assembler:
./bin/vm --rom roms/stage1_assembler-0 --tape_01 stage1/stage1_assembler-1.hex0 --tape_02 roms/stage1_assembler-1
roms/stage1_assembler-1 should have the sha256sum of e4f0ed6e78ae79bb5e4a4fbde36f085dd0469cd6ae036dce5953b3d1c89801ce
roms/stage1_assembler-1 should have the sha256sum of e59338381ca3ab01a14fa0fc85d0fa1c6e4d59a06ac2d9d75668d878ab469769
* Step 4 get even long label support
Now that we have labels and pointers, I want the ability to have labels like :main_function and :stack_start and be able to reference the absolute address of things in my code like $stack_start and complex objects that have 32bit pointers like &foo_bar.

248
stage1/stage1_assembler-1.hex0
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@ -1,7 +1,7 @@
## Copyright (C) 2016 Jeremiah Orians
## This file is part of stage0.
##
## stage0 is free software: you an redistribute it and/or modify
## stage0 is free software: you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
@ -14,14 +14,11 @@
## You should have received a copy of the GNU General Public License
## along with stage0. If not, see <http://www.gnu.org/licenses/>.
# start
2D2801e8 # LOADUI R8 @table ; Where we are putting our address pointers
2D2900ff # LOADUI R9 0xFF ; Byte mask
2D2A000f # LOADUI R10 0x0F ; nybble mask
2D2B0001 # LOADUI R11 1 ; Our toggle
0D00002C # FALSE R12 ; Our PC counter
2D2D0600 # LOADUI R13 0x600 ; Where we are starting our Stack
# ;; We will be using R14 for our condition codes
#:start 0
2D2B019C # LOADUI R11 $table ; Where we are putting our address pointers
0D00003C # TRUE R12 ; Our toggle
0D00002D # FALSE R13 ; Our PC counter
2D2E0040 # LOADUI R14 $getLables_2 ; our first iterator
# ;; We will be using R15 for holding our processed nybbles
# ;; Prep TAPE_01
@ -32,211 +29,194 @@
2D201101 # LOADUI R0 0x1101
42100001 # FOPEN_WRITE
# ;; Function for collecting the address of all labels
# getLables
2D211100 # LOADUI R1 0x1100 ; Read from tape_01
42100100 # FGETC ; Read a Char
# ;; Check for EOF
A0100000 # CMPSKIPI.GE R0 0
3C00005c # JUMP @stage2
# ;; Function for collecting the address of all labels
#:getLables 24
42100100 # FGETC ; Read a Char
2CC00048 # JUMP.NP R0 @stage2 ; Check for EOF
# ;; Check for Label
A030003a # CMPSKIPI.NE R0 58 ; If the Char is : the next char is the label
2D0D0040 # CALLI R13 @storeLabel
A030003A # CMPSKIPI.NE R0 58 ; If the Char is : the next char is the label
3C000030 # JUMP @storeLabel
# ;; Check for pointer to label
1FE00040 # CMPUI R14 R0 64 ; If the Char is @ the next char is the pointer to a label
2C6E0014 # JUMP.NE R14 @.L0
A0300040 # CMPSKIPI.NE R0 64 ; If the Char is @ the next char is the pointer to a label
3C00001C # JUMP @ignorePointer
# ;; Ignore the pointer for now
2D211100 # LOADUI R1 0x1100 ; Read from tape_01
42100100 # FGETC ; Read a Char
0FCC0002 # ADDUI R12 R12 2 ; The pointer will end up taking 2 bytes
3C00ffd4 # JUMP @getLables
# .L0
# ;; Otherwise attempt to process
2D0D00fc # CALLI R13 @hex ; Convert it
A0100000 # CMPSKIPI.GE R0 0 ; Don't record, nonhex values
3C00ffc8 # JUMP @getLables ; Move onto Next char
3C0000DC # JUMP @hex ; Convert it
# ;; Determine if we got a full byte
2C9B000c # JUMP.Z R11 @.L1 ; Jump if toggled
#:getLables_2 40
2CC0FFE4 # JUMP.NP R0 @getLables ; Don't record, nonhex values
090006CC # NOT R12 R12 ; Flip the toggle
2C9CFFDC # JUMP.Z R12 @getLables ; First half doesn't need anything
# ;; Deal with case of first half of byte
0D00002B # FALSE R11 ; Flip the toggle
3C00ffbc # JUMP @getLables
# .L1
# ;; Deal with case of second half of byte
0D00003B # TRUE R11 ; Flip the toggle
0FCC0001 # ADDUI R12 R12 1 ; increment PC now that we have a full byte
3C00ffb0 # JUMP @getLables
0FDD0001 # ADDUI R13 R13 1 ; increment PC now that we have a full byte
3C00FFD4 # JUMP @getLables
#:ignorePointer 54
# ;; Ignore the pointer for now
42100100 # FGETC ; Read a Char
0FDD0002 # ADDUI R13 R13 2 ; The pointer will end up taking 2 bytes
3C00FFC8 # JUMP @getLables
# ;; Function for storing the address of the label
# storeLabel
#:storeLabel 60
# ;; Get the char of the Label
2D211100 # LOADUI R1 0x1100 ; Read from tape_01
42100100 # FGETC ; Read a Char
# ;; We require 4 bytes to store the pointer values
2D500002 # SL0I R0 2 ; Thus we multiply our label by 4
# ;; We require 2 bytes to store the pointer values
2D500001 # SL0I R0 1 ; Thus we multiply our label by 2
# ;; Store the current Program counter
05048C80 # STOREX R12 R8 R0
0504ADB0 # STOREX16 R13 R11 R0
# ;; Label is safely stored, return
0D01001D # RET R13
3C00FFB8 # JUMP @getLables
# ;; Main Functionality
# stage2
# ;; Now that we have all of the label addresses,
# ;; We can process input to produce our output
#:stage2 70
# ;; We first need to rewind tape_01 to perform our second pass
2D201100 # LOADUI R0 0x1100
42100003 # REWIND
# ;; Reset our toggle and counter, just in case
2D2B0001 # LOADUI R11 1 ; Our toggle
0D00002C # FALSE R12 ; Our PC counter
# ;; Reset our toggle and counter
2D291101 # LOADUI R9 0x1101 ; Where to write the combined byte
0D00003C # TRUE R12 ; Our toggle
0D00002D # FALSE R13 ; Our PC counter
2D2E00A4 # LOADUI R14 $loop_hex ; The hex return target
# loop
2D211100 # LOADUI R1 0x1100 ; Read from tape_01
#:loop 88
42100100 # FGETC ; Read a Char
# ;; Check for EOF
A0100000 # CMPSKIPI.GE R0 0
3C000128 # JUMP @finish
2CC000FC # JUMP.NP R0 @finish ; Check for EOF
# ;; Check for Label
1FE0003a # CMPUI R14 R0 58 ; Make sure we jump over the label
2C6E0010 # JUMP.NE R14 @.L97
A030003A # CMPSKIPI.NE R0 58 ; Make sure we jump over the label
3C000044 # JUMP @ignoreLabel
# ;; Consume next char
2D211100 # LOADUI R1 0x1100 ; Read from tape_01
42100100 # FGETC ; Read a Char
3C00ffe0 # JUMP @loop
# .L97
# ;; Check for Pointer
1FE00040 # CMPUI R14 R0 64 ; If it is a pointer Deal with it
2C6E000c # JUMP.NE R14 @.L98 ; Otherwise attempt to process it
2D0D004c # CALLI R13 @storePointer
3C00ffd0 # JUMP @loop
A0300040 # CMPSKIPI.NE R0 64 ; If it is a pointer Deal with it
3C000044 # JUMP @storePointer
# .L98
# ;; Process Char
2D210000 # LOADUI R1 0 ; Write to Char to TTY
42100200 # FPUTC ; Print the Char
2D0D0078 # CALLI R13 @hex ; Convert it
12E00000 # CMPI R14 R0 0 ; Check if it is hex
2C8Effbc # JUMP.L R14 @loop ; Don't use nonhex chars
2C9B0010 # JUMP.Z R11 @.L99 ; Jump if toggled
3C000078 # JUMP @hex ; Convert it
#:loop_hex a4
2CC0FFE4 # JUMP.NP R0 @loop ; Don't use nonhex chars
090006CC # NOT R12 R12 ; Flip the toggle
2CAC000C # JUMP.NZ R12 @loop_second_nybble ; Jump if toggled
# ;; Process first byte of pair
05020F0A # AND R15 R0 R10 ; Store First nibble
0D00002B # FALSE R11 ; Flip the toggle
3C00ffac # JUMP @loop
B0F0000F # ANDI R15 R0 0xF ; Store First nibble
3C00FFD4 # JUMP @loop
# .L99
#:loop_second_nybble b8
2D5F0004 # SL0I R15 4 ; Shift our first nibble
0502000A # AND R0 R0 R10 ; Mask out top
B000000F # ANDI R0 R0 0xF ; Mask out top
0500000F # ADD R0 R0 R15 ; Combine nibbles
0D00003B # TRUE R11 ; Flip the toggle
2D211101 # LOADUI R1 0x1101 ; Write the combined byte
09000319 # SWAP R1 R9 ; Set to write to tape_2
42100200 # FPUTC ; To TAPE_02
0FCC0001 # ADDUI R12 R12 1 ; increment PC now that we have a full byte
3C00ff8c # JUMP @loop ; Try to get more bytes
09000319 # SWAP R1 R9 ; Restore from tape_1
0FDD0001 # ADDUI R13 R13 1 ; increment PC now that we have a full byte
3C00FFB4 # JUMP @loop ; Try to get more bytes
# storePointer
#:ignoreLabel d8
# ;; Consume next char
42100100 # FGETC ; Read a Char
3C00FFAC # JUMP @loop
#:storePointer e0
# ;; Correct the PC to reflect the size of the pointer
0FCC0002 # ADDUI R12 R12 2 ; Exactly 2 bytes
0FDD0002 # ADDUI R13 R13 2 ; Exactly 2 bytes
# ;; Get the char of the Label
2D211100 # LOADUI R1 0x1100 ; Read from tape_01
42100100 # FGETC ; Read a Char
# ;; Since we stored a full pointer taking up 4 bytes
2D500002 # SL0I R0 2 ; Thus we multiply our label by 4 to get where it is stored
05038280 # LOADX R2 R8 R0 ; Load the address of the label
# ;; Since we stored a short pointer taking up 2 bytes
2D500001 # SL0I R0 1 ; Thus we multiply our label by 2 to get where it is stored
0503C3B0 # LOADXU16 R3 R11 R0 ; Load the address of the label
# ;; We now have to calculate the distance and store the 2 bytes
0500222C # SUB R2 R2 R12 ; First determine the difference between the current PC and the stored PC of the label
0F220004 # ADDUI R2 R2 4 ; Adjust for relative positioning
0500233D # SUB R3 R3 R13 ; First determine the difference between the current PC and the stored PC of the label
0F330004 # ADDUI R3 R3 4 ; Adjust for relative positioning
# ;; Store Upper byte
09000402 # COPY R0 R2
B003FF00 # ANDI R0 R3 0xFF00 ; Mask out everything but top byte
2D400008 # SARI R0 8 ; Drop the bottom 8 bits
05020009 # AND R0 R0 R9 ; Mask out everything but bottom bits
2D211101 # LOADUI R1 0x1101 ; Write the byte
09000319 # SWAP R1 R9 ; Write the byte
42100200 # FPUTC ; To TAPE_02
# ;; Store Lower byte
05020029 # AND R0 R2 R9 ; Drop everything but the bottom 8 bits
B00300FF # ANDI R0 R3 0xFF ; Preserve bottom half for later
42100200 # FPUTC ; Write the byte to TAPE_02
0D01001D # RET R13
09000319 # SWAP R1 R9 ; Restore Read
3C00FF74 # JUMP @loop
# hex
# ;; Hex function
# ;; Returns hex value of ascii char
# ;; Or -1 if not a hex char
#:hex 118
# ;; Deal with line comments starting with #
1FE00023 # CMPUI R14 R0 35
2C5E0060 # JUMP.E R14 @ascii_comment
A0300023 # CMPSKIPI.NE R0 35
3C000058 # JUMP @ascii_comment
# ;; Deal with line comments starting with ;
1FE0003b # CMPUI R14 R0 59
2C5E0058 # JUMP.E R14 @ascii_comment
A030003B # CMPSKIPI.NE R0 59
3C000050 # JUMP @ascii_comment
# ;; Deal with all ascii less than '0'
1FE00030 # CMPUI R14 R0 48
2C8E0048 # JUMP.L R14 @ascii_other
A0100030 # CMPSKIPI.GE R0 48
3C000054 # JUMP @ascii_other
# ;; Deal with '0'-'9'
1FE00039 # CMPUI R14 R0 57
2C7E0028 # JUMP.LE R14 @ascii_num
A0000039 # CMPSKIPI.G R0 57
3C000028 # JUMP @ascii_num
# ;; Deal with all ascii less than 'A'
1FE00041 # CMPUI R14 R0 65
2C8E0038 # JUMP.L R14 @ascii_other
A0100041 # CMPSKIPI.GE R0 65
3C000044 # JUMP @ascii_other
# ;; Deal with 'A'-'F'
1FE00046 # CMPUI R14 R0 70
2C7E0028 # JUMP.LE R14 @ascii_high
A0000046 # CMPSKIPI.G R0 70
3C000028 # JUMP @ascii_high
# ;; Deal with all ascii less than 'a'
1FE00061 # CMPUI R14 R0 97
2C8E0028 # JUMP.L R14 @ascii_other
A0100061 # CMPSKIPI.GE R0 97
3C000034 # JUMP @ascii_other
# ;; Deal with 'a'-'f'
1FE00066 # CMPUI R14 R0 102
2C7E0010 # JUMP.LE R14 @ascii_low
A0000066 # CMPSKIPI.G R0 102
3C000010 # JUMP @ascii_low
# ;; Ignore the rest
3C00001c # JUMP @ascii_other
3C000028 # JUMP @ascii_other
# ascii_num
#:ascii_num 15c
11000030 # SUBUI R0 R0 48
0D01001D # RET R13
0D01000E # JSR_COROUTINE R14
# ascii_low
#:ascii_low 164
11000057 # SUBUI R0 R0 87
0D01001D # RET R13
0D01000E # JSR_COROUTINE R14
# ascii_high
#:ascii_high 16c
11000037 # SUBUI R0 R0 55
0D01001D # RET R13
0D01000E # JSR_COROUTINE R14
# ascii_other
0D000030 # TRUE R0
0D01001D # RET R13
# ascii_comment
2D211100 # LOADUI R1 0x1100 ; Read from TAPE_01
#:ascii_comment 174
42100100 # FGETC ; Read another char
1FE0000a # CMPUI R14 R0 10 ; Stop at the end of line
2D210000 # LOADUI R1 0 ; Write to TTY
42100200 # FPUTC ; The char we just read
2C6Effec # JUMP.NE R14 @ascii_comment ; Otherwise keep looping
3C00ffe0 # JUMP @ascii_other
A020000A # CMPSKIPI.E R0 10 ; Stop at the end of line
3C00FFF8 # JUMP @ascii_comment ; Otherwise keep looping
# finish
#:ascii_other 180
0D000030 # TRUE R0
0D01000E # JSR_COROUTINE R14
#:finish 188
2D201100 # LOADUI R0 0x1100 ; Close TAPE_01
42100002 # FCLOSE
2D201101 # LOADUI R0 0x1101 ; Close TAPE_02
@ -244,4 +224,4 @@ A0100000 # CMPSKIPI.GE R0 0
FFFFFFFF # HALT
# ;; Where all of our pointers will be stored for our locations
# table
#:table 19c

265
stage1/stage1_assembler-1.hex1
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@ -1,265 +0,0 @@
## Copyright (C) 2016 Jeremiah Orians
## This file is part of stage0.
##
## stage0 is free software: you an redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## stage0 is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with stage0. If not, see <http://www.gnu.org/licenses/>.
# start
2D28 @z # LOADUI R8 @table ; Where we are putting our address pointers
2D2900ff # LOADUI R9 0xFF ; Byte mask
2D2A000f # LOADUI R10 0x0F ; nybble mask
2D2B0001 # LOADUI R11 1 ; Our toggle
0D00002C # FALSE R12 ; Our PC counter
2D2D0600 # LOADUI R13 0x600 ; Where we are starting our Stack
# ;; We will be using R14 for our condition codes
# ;; We will be using R15 for holding our processed nybbles
# ;; Prep TAPE_01
2D201100 # LOADUI R0 0x1100
42100000 # FOPEN_READ
# ;; Prep TAPE_02
2D201101 # LOADUI R0 0x1101
42100001 # FOPEN_WRITE
# ;; Function for collecting the address of all labels
# getLables
:a
2D211100 # LOADUI R1 0x1100 ; Read from tape_01
42100100 # FGETC ; Read a Char
# ;; Check for EOF
A0100000 # CMPSKIPI.GE R0 0
3C00 @e # JUMP @stage2
# ;; Check for Label
A030003a # CMPSKIPI.NE R0 58 ; If the Char is : the next char is the label
2D0D @d # CALLI R13 @storeLabel
# ;; Check for pointer to label
1FE00040 # CMPUI R14 R0 64 ; If the Char is @ the next char is the pointer to a label
2C6E @b # JUMP.NE R14 @.L0
# ;; Ignore the pointer for now
2D211100 # LOADUI R1 0x1100 ; Read from tape_01
42100100 # FGETC ; Read a Char
0FCC0002 # ADDUI R12 R12 2 ; The pointer will end up taking 2 bytes
3C00 @a # JUMP @getLables
# .L0
:b
# ;; Otherwise attempt to process
2D0D @k # CALLI R13 @hex ; Convert it
A0100000 # CMPSKIPI.GE R0 0 ; Don't record, nonhex values
3C00 @a # JUMP @getLables ; Move onto Next char
# ;; Determine if we got a full byte
2C9B @c # JUMP.Z R11 @.L1 ; Jump if toggled
# ;; Deal with case of first half of byte
0D00002B # FALSE R11 ; Flip the toggle
3C00 @a # JUMP @getLables
# .L1
:c
# ;; Deal with case of second half of byte
0D00003B # TRUE R11 ; Flip the toggle
0FCC0001 # ADDUI R12 R12 1 ; increment PC now that we have a full byte
3C00 @a # JUMP @getLables
# ;; Function for storing the address of the label
# storeLabel
:d
# ;; Get the char of the Label
2D211100 # LOADUI R1 0x1100 ; Read from tape_01
42100100 # FGETC ; Read a Char
# ;; We require 4 bytes to store the pointer values
2D500002 # SL0I R0 2 ; Thus we multiply our label by 4
# ;; Store the current Program counter
05048C80 # STOREX R12 R8 R0
# ;; Label is safely stored, return
0D01001D # RET R13
# ;; Main Functionality
# stage2
:e
# ;; We first need to rewind tape_01 to perform our second pass
2D201100 # LOADUI R0 0x1100
42100003 # REWIND
# ;; Reset our toggle and counter, just in case
2D2B0001 # LOADUI R11 1 ; Our toggle
0D00002C # FALSE R12 ; Our PC counter
# loop
:f
2D211100 # LOADUI R1 0x1100 ; Read from tape_01
42100100 # FGETC ; Read a Char
# ;; Check for EOF
A0100000 # CMPSKIPI.GE R0 0
3C00 @q # JUMP @finish
# ;; Check for Label
1FE0003a # CMPUI R14 R0 58 ; Make sure we jump over the label
2C6E @g # JUMP.NE R14 @.L97
# ;; Consume next char
2D211100 # LOADUI R1 0x1100 ; Read from tape_01
42100100 # FGETC ; Read a Char
3C00 @f # JUMP @loop
# .L97
:g
# ;; Check for Pointer
1FE00040 # CMPUI R14 R0 64 ; If it is a pointer Deal with it
2C6E @h # JUMP.NE R14 @.L98 ; Otherwise attempt to process it
2D0D @j # CALLI R13 @storePointer
3C00 @f # JUMP @loop
# .L98
:h
# ;; Process Char
2D210000 # LOADUI R1 0 ; Write to Char to TTY
42100200 # FPUTC ; Print the Char
2D0D @k # CALLI R13 @hex ; Convert it
12E00000 # CMPI R14 R0 0 ; Check if it is hex
2C8E @f # JUMP.L R14 @loop ; Don't use nonhex chars
2C9B @i # JUMP.Z R11 @.L99 ; Jump if toggled
# ;; Process first byte of pair
05020F0A # AND R15 R0 R10 ; Store First nibble
0D00002B # FALSE R11 ; Flip the toggle
3C00 @f # JUMP @loop
# .L99
:i
2D5F0004 # SL0I R15 4 ; Shift our first nibble
0502000A # AND R0 R0 R10 ; Mask out top
0500000F # ADD R0 R0 R15 ; Combine nibbles
0D00003B # TRUE R11 ; Flip the toggle
2D211101 # LOADUI R1 0x1101 ; Write the combined byte
42100200 # FPUTC ; To TAPE_02
0FCC0001 # ADDUI R12 R12 1 ; increment PC now that we have a full byte
3C00 @f # JUMP @loop ; Try to get more bytes
# storePointer
:j
# ;; Correct the PC to reflect the size of the pointer
0FCC0002 # ADDUI R12 R12 2 ; Exactly 2 bytes
# ;; Get the char of the Label
2D211100 # LOADUI R1 0x1100 ; Read from tape_01
42100100 # FGETC ; Read a Char
# ;; Since we stored a full pointer taking up 4 bytes
2D500002 # SL0I R0 2 ; Thus we multiply our label by 4 to get where it is stored
05038280 # LOADX R2 R8 R0 ; Load the address of the label
# ;; We now have to calculate the distance and store the 2 bytes
0500222C # SUB R2 R2 R12 ; First determine the difference between the current PC and the stored PC of the label
0F220004 # ADDUI R2 R2 4 ; Adjust for relative positioning
# ;; Store Upper byte
09000402 # COPY R0 R2
2D400008 # SARI R0 8 ; Drop the bottom 8 bits
05020009 # AND R0 R0 R9 ; Mask out everything but bottom bits
2D211101 # LOADUI R1 0x1101 ; Write the byte
42100200 # FPUTC ; To TAPE_02
# ;; Store Lower byte
05020029 # AND R0 R2 R9 ; Drop everything but the bottom 8 bits
42100200 # FPUTC ; Write the byte to TAPE_02
0D01001D # RET R13
# hex
:k
# ;; Deal with line comments starting with #
1FE00023 # CMPUI R14 R0 35
2C5E @p # JUMP.E R14 @ascii_comment
# ;; Deal with line comments starting with ;
1FE0003b # CMPUI R14 R0 59
2C5E @p # JUMP.E R14 @ascii_comment
# ;; Deal with all ascii less than '0'
1FE00030 # CMPUI R14 R0 48
2C8E @o # JUMP.L R14 @ascii_other
# ;; Deal with '0'-'9'
1FE00039 # CMPUI R14 R0 57
2C7E @l # JUMP.LE R14 @ascii_num
# ;; Deal with all ascii less than 'A'
1FE00041 # CMPUI R14 R0 65
2C8E @o # JUMP.L R14 @ascii_other
# ;; Deal with 'A'-'F'
1FE00046 # CMPUI R14 R0 70
2C7E @n # JUMP.LE R14 @ascii_high
# ;; Deal with all ascii less than 'a'
1FE00061 # CMPUI R14 R0 97
2C8E @o # JUMP.L R14 @ascii_other
# ;; Deal with 'a'-'f'
1FE00066 # CMPUI R14 R0 102
2C7E @m # JUMP.LE R14 @ascii_low
# ;; Ignore the rest
3C00 @o # JUMP @ascii_other
# ascii_num
:l
11000030 # SUBUI R0 R0 48
0D01001D # RET R13
# ascii_low
:m
11000057 # SUBUI R0 R0 87
0D01001D # RET R13
# ascii_high
:n
11000037 # SUBUI R0 R0 55
0D01001D # RET R13
# ascii_other
:o
0D000030 # TRUE R0
0D01001D # RET R13
# ascii_comment
:p
2D211100 # LOADUI R1 0x1100 ; Read from TAPE_01
42100100 # FGETC ; Read another char
1FE0000a # CMPUI R14 R0 10 ; Stop at the end of line
2D210000 # LOADUI R1 0 ; Write to TTY
42100200 # FPUTC ; The char we just read
2C6E @p # JUMP.NE R14 @ascii_comment ; Otherwise keep looping
3C00 @o # JUMP @ascii_other
# finish
:q
2D201100 # LOADUI R0 0x1100 ; Close TAPE_01
42100002 # FCLOSE
2D201101 # LOADUI R0 0x1101 ; Close TAPE_02
42100002 # FCLOSE
FFFFFFFF # HALT
# ;; Where all of our pointers will be stored for our locations
# table
:z

201
stage1/stage1_assembler-1.s
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@ -15,13 +15,10 @@
; along with stage0. If not, see <http://www.gnu.org/licenses/>.
:start
LOADUI R8 @table ; Where we are putting our address pointers
LOADUI R9 0xFF ; Byte mask
LOADUI R10 0x0F ; nybble mask
LOADUI R11 1 ; Our toggle
FALSE R12 ; Our PC counter
LOADUI R13 0x600 ; Where we are starting our Stack
;; We will be using R14 for our condition codes
LOADUI R11 $table ; Where we are putting our address pointers
TRUE R12 ; Our toggle
FALSE R13 ; Our PC counter
LOADUI R14 $getLables_2 ; our first iterator
;; We will be using R15 for holding our processed nybbles
;; Prep TAPE_01
@ -32,150 +29,135 @@
LOADUI R0 0x1101
FOPEN_WRITE
LOADUI R1 0x1100 ; Read from tape_01
;; Function for collecting the address of all labels
:getLables
LOADUI R1 0x1100 ; Read from tape_01
FGETC ; Read a Char
;; Check for EOF
CMPSKIPI.GE R0 0
JUMP @stage2
JUMP.NP R0 @stage2
;; Check for Label
CMPSKIPI.NE R0 58 ; If the Char is : the next char is the label
CALLI R13 @storeLabel
JUMP @storeLabel
;; Check for pointer to label
CMPUI R14 R0 64 ; If the Char is @ the next char is the pointer to a label
JUMP.NE R14 @.L0
CMPSKIPI.NE R0 64 ; If the Char is @ the next char is the pointer to a label
JUMP @ignorePointer
;; Ignore the pointer for now
LOADUI R1 0x1100 ; Read from tape_01
FGETC ; Read a Char
ADDUI R12 R12 2 ; The pointer will end up taking 2 bytes
JUMP @getLables
:.L0
;; Otherwise attempt to process
CALLI R13 @hex ; Convert it
CMPSKIPI.GE R0 0 ; Don't record, nonhex values
JUMP @getLables ; Move onto Next char
JUMP @hex ; Convert it
:getLables_2
JUMP.NP R0 @getLables ; Don't record, nonhex values
NOT R12 R12 ; Flip the toggle
JUMP.Z R12 @getLables ; First half doesn't need anything
;; Determine if we got a full byte
JUMP.Z R11 @.L1 ; Jump if toggled
;; Deal with case of first half of byte
FALSE R11 ; Flip the toggle
;; Deal with case of second half of byte
ADDUI R13 R13 1 ; increment PC now that we have a full byte
JUMP @getLables
:.L1
;; Deal with case of second half of byte
TRUE R11 ; Flip the toggle
ADDUI R12 R12 1 ; increment PC now that we have a full byte
:ignorePointer
;; Ignore the pointer for now
FGETC ; Read a Char
ADDUI R13 R13 2 ; The pointer will end up taking 2 bytes
JUMP @getLables
;; Function for storing the address of the label
:storeLabel
;; Get the char of the Label
LOADUI R1 0x1100 ; Read from tape_01
FGETC ; Read a Char
;; We require 4 bytes to store the pointer values
SL0I R0 2 ; Thus we multiply our label by 4
;; We require 2 bytes to store the pointer values
SL0I R0 1 ; Thus we multiply our label by 2
;; Store the current Program counter
STOREX R12 R8 R0
STOREX16 R13 R11 R0
;; Label is safely stored, return
RET R13
JUMP @getLables
;; Main Functionality
;; Now that we have all of the label addresses,
;; We can process input to produce our output
:stage2
;; We first need to rewind tape_01 to perform our second pass
LOADUI R0 0x1100
REWIND
;; Reset our toggle and counter, just in case
LOADUI R11 1 ; Our toggle
FALSE R12 ; Our PC counter
;; Reset our toggle and counter
LOADUI R9 0x1101 ; Where to write the combined byte
TRUE R12 ; Our toggle
FALSE R13 ; Our PC counter
LOADUI R14 $loop_hex ; The hex return target
:loop
LOADUI R1 0x1100 ; Read from tape_01
FGETC ; Read a Char
;; Check for EOF
CMPSKIPI.GE R0 0
JUMP @finish
JUMP.NP R0 @finish
;; Check for Label
CMPUI R14 R0 58 ; Make sure we jump over the label
JUMP.NE R14 @.L97
CMPSKIPI.NE R0 58 ; Make sure we jump over the label
JUMP @ignoreLabel
;; Consume next char
LOADUI R1 0x1100 ; Read from tape_01
FGETC ; Read a Char
JUMP @loop
:.L97
;; Check for Pointer
CMPUI R14 R0 64 ; If it is a pointer Deal with it
JUMP.NE R14 @.L98 ; Otherwise attempt to process it
CALLI R13 @storePointer
JUMP @loop
CMPSKIPI.NE R0 64 ; If it is a pointer Deal with it
JUMP @storePointer
:.L98
;; Process Char
LOADUI R1 0 ; Write to Char to TTY
FPUTC ; Print the Char
CALLI R13 @hex ; Convert it
CMPI R14 R0 0 ; Check if it is hex
JUMP.L R14 @loop ; Don't use nonhex chars
JUMP.Z R11 @.L99 ; Jump if toggled
JUMP @hex ; Convert it
:loop_hex
JUMP.NP R0 @loop ; Don't use nonhex chars
NOT R12 R12 ; Flip the toggle
JUMP.NZ R12 @loop_second_nybble ; Jump if toggled
;; Process first byte of pair
AND R15 R0 R10 ; Store First nibble
FALSE R11 ; Flip the toggle
ANDI R15 R0 0xF ; Store First nibble
JUMP @loop
:.L99
:loop_second_nybble
SL0I R15 4 ; Shift our first nibble
AND R0 R0 R10 ; Mask out top
ANDI R0 R0 0xF ; Mask out top
ADD R0 R0 R15 ; Combine nibbles
TRUE R11 ; Flip the toggle
LOADUI R1 0x1101 ; Write the combined byte
SWAP R1 R9 ; Set to write to tape_2
FPUTC ; To TAPE_02
ADDUI R12 R12 1 ; increment PC now that we have a full byte
SWAP R1 R9 ; Restore from tape_1
ADDUI R13 R13 1 ; increment PC now that we have a full byte
JUMP @loop ; Try to get more bytes
:ignoreLabel
;; Consume next char
FGETC ; Read a Char
JUMP @loop
:storePointer
;; Correct the PC to reflect the size of the pointer
ADDUI R12 R12 2 ; Exactly 2 bytes
ADDUI R13 R13 2 ; Exactly 2 bytes
;; Get the char of the Label
LOADUI R1 0x1100 ; Read from tape_01
FGETC ; Read a Char
;; Since we stored a full pointer taking up 4 bytes
SL0I R0 2 ; Thus we multiply our label by 4 to get where it is stored
LOADX R2 R8 R0 ; Load the address of the label
;; Since we stored a short pointer taking up 2 bytes
SL0I R0 1 ; Thus we multiply our label by 2 to get where it is stored
LOADXU16 R3 R11 R0 ; Load the address of the label
;; We now have to calculate the distance and store the 2 bytes
SUB R2 R2 R12 ; First determine the difference between the current PC and the stored PC of the label
ADDUI R2 R2 4 ; Adjust for relative positioning
SUB R3 R3 R13 ; First determine the difference between the current PC and the stored PC of the label
ADDUI R3 R3 4 ; Adjust for relative positioning
;; Store Upper byte
COPY R0 R2
ANDI R0 R3 0xFF00 ; Mask out everything but top byte
SARI R0 8 ; Drop the bottom 8 bits
AND R0 R0 R9 ; Mask out everything but bottom bits
LOADUI R1 0x1101 ; Write the byte
SWAP R1 R9 ; Write the byte
FPUTC ; To TAPE_02
;; Store Lower byte
AND R0 R2 R9 ; Drop everything but the bottom 8 bits
ANDI R0 R3 0xFF ; Preserve bottom half for later
FPUTC ; Write the byte to TAPE_02
RET R13
SWAP R1 R9 ; Restore Read
JUMP @loop
;; Hex function
@ -183,52 +165,48 @@
;; Or -1 if not a hex char
:hex
;; Deal with line comments starting with #
CMPUI R14 R0 35
JUMP.E R14 @ascii_comment
CMPSKIPI.NE R0 35
JUMP @ascii_comment
;; Deal with line comments starting with ;
CMPUI R14 R0 59
JUMP.E R14 @ascii_comment
CMPSKIPI.NE R0 59
JUMP @ascii_comment
;; Deal with all ascii less than '0'
CMPUI R14 R0 48
JUMP.L R14 @ascii_other
CMPSKIPI.GE R0 48
JUMP @ascii_other
;; Deal with '0'-'9'
CMPUI R14 R0 57
JUMP.LE R14 @ascii_num
CMPSKIPI.G R0 57
JUMP @ascii_num
;; Deal with all ascii less than 'A'
CMPUI R14 R0 65
JUMP.L R14 @ascii_other
CMPSKIPI.GE R0 65
JUMP @ascii_other
;; Deal with 'A'-'F'
CMPUI R14 R0 70
JUMP.LE R14 @ascii_high
CMPSKIPI.G R0 70
JUMP @ascii_high
;; Deal with all ascii less than 'a'
CMPUI R14 R0 97
JUMP.L R14 @ascii_other
CMPSKIPI.GE R0 97
JUMP @ascii_other
;; Deal with 'a'-'f'
CMPUI R14 R0 102
JUMP.LE R14 @ascii_low
CMPSKIPI.G R0 102
JUMP @ascii_low
;; Ignore the rest
JUMP @ascii_other
:ascii_num
SUBUI R0 R0 48
RET R13
JSR_COROUTINE R14
:ascii_low
SUBUI R0 R0 87
RET R13
JSR_COROUTINE R14
:ascii_high
SUBUI R0 R0 55
RET R13
JSR_COROUTINE R14
:ascii_comment
FGETC ; Read another char
CMPSKIPI.E R0 10 ; Stop at the end of line
JUMP @ascii_comment ; Otherwise keep looping
:ascii_other
TRUE R0
RET R13
:ascii_comment
LOADUI R1 0x1100 ; Read from TAPE_01
FGETC ; Read another char
CMPUI R14 R0 10 ; Stop at the end of line
LOADUI R1 0 ; Write to TTY
FPUTC ; The char we just read
JUMP.NE R14 @ascii_comment ; Otherwise keep looping
JUMP @ascii_other
JSR_COROUTINE R14
:finish
LOADUI R0 0x1100 ; Close TAPE_01
@ -237,6 +215,5 @@
FCLOSE
HALT
;; Where all of our pointers will be stored for our locations
:table

2
test/SHA256SUMS
View File

@ -6,5 +6,5 @@ b3a910f18c6bc0ef4aa7a53cb3f0216a9f143319da67ed2a02210fe88b1e1131 roms/forth
24a4d74eb2eb7a82e68335643855658b27b5a6c3b13db473539f3e08d6f26ceb roms/SET
0a427b14020354d1c785f5f900677e0059fce8f8d4456e9c19e5528cb17101eb roms/stage0_monitor
85e5c06ac07f2b97d01dfb5454f5a698b3ec6c21fe53bf3fa57b386aac7b9601 roms/stage1_assembler-0
e4f0ed6e78ae79bb5e4a4fbde36f085dd0469cd6ae036dce5953b3d1c89801ce roms/stage1_assembler-1
e59338381ca3ab01a14fa0fc85d0fa1c6e4d59a06ac2d9d75668d878ab469769 roms/stage1_assembler-1
61c1b0f2f628847d9491bd678ac7a23231527cc36493b321612f191674ff3c99 roms/stage1_assembler-2