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#1 2009-04-02 2:38:35 pm

Dwedit
Administrator
From: Chicago
Registered: 2004-12-12
Posts: 1,022
Website

ARM SDT to GCC asm conversion tool

This is the ARM SDT to GCC asm conversion tool I used to port PocketNES and Goomba Color to GCC.
This tool does not do the whole job though.


Attachments:
Attachment Icon asmconv.zip, Size: 104,141 bytes, Downloads: 280

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#2 2009-04-02 2:50:38 pm

Dwedit
Administrator
From: Chicago
Registered: 2004-12-12
Posts: 1,022
Website

Re: ARM SDT to GCC asm conversion tool

How to use it:
For example, I'll use PocketNES:

Make a "Project" file:  (I named it project3.txt)

6502.s
apack.s
boot.s
cart.s
cf.s
io.s
link.s
mem.s
memory.s
ppu.s
sound.s
visoly.s

mappers/konami.s
mappers/map023771.s
mappers/map1.s
mappers/map105.s
mappers/map1166.s
mappers/map15.s
mappers/map151.s
mappers/map16.s
mappers/map17.s
mappers/map18.s
mappers/map184.s
mappers/map19.s
mappers/map2125.s
mappers/map22.s
mappers/map228.s
mappers/map23.s
mappers/map232.s
mappers/map2426.s
mappers/map32.s
mappers/map33.s
mappers/map34.s
mappers/map4.s
mappers/map40.s
mappers/map42.s
mappers/map5.s
mappers/map64.s
mappers/map65.s
mappers/map67.s
mappers/map68.s
mappers/map69.s
mappers/map70152.s
mappers/map72.s
mappers/map73.s
mappers/map75.s
mappers/map76.s
mappers/map77.s
mappers/map78.s
mappers/map79.s
mappers/map80.s
mappers/map82.s
mappers/map85.s
mappers/map86.s
mappers/map87.s
mappers/map88.s
mappers/map9.s
mappers/map92.s
mappers/map93.s
mappers/map94.s
mappers/map97.s
mappers/map99.s

Make a batch file:  (I named it convert.bat)

cd directory_containing_your_code
..\asmconv.exe ..\project3.txt ..\output_directory
cd ..

Make sure output_directory and any necessary subdirectories exist already.  Maybe copy all the original versions of files there too, files that need modification get overwritten anyway.

More stuff:
The generated code may depend on macros, here's a portion of them you'll need:

	.macro adrl2 reg,label
	mov \reg,#\label&0x0FF00000
	add \reg,\reg,#\label&0x000FFFFF
	.endm

	.macro start_map base, register
	@GBLA _map_address_
 _map_address_ = \base
	.endm

	.macro _m_ label=0,size
	.if \label != 0
 \label = _map_address_
	.endif
 _map_address_ = _map_address_ + \size
	.endm

	.macro ldr_ reg,label
	ldr \reg,[globalptr,#\label]
	.endm
	
	.macro ldrb_ reg,label
	ldrb \reg,[globalptr,#\label]
	.endm
	
	.macro ldrh_ reg,label
	ldrh \reg,[globalptr,#\label]
	.endm
	
	.macro str_ reg,label
	str \reg,[globalptr,#\label]
	.endm
	
	.macro strb_ reg,label
	strb \reg,[globalptr,#\label]
	.endm
	
	.macro strh_ reg,label
	strh \reg,[globalptr,#\label]
	.endm



	.macro ldreq_ reg,label
	ldreq \reg,[globalptr,#\label]
	.endm
	
	.macro ldreqb_ reg,label
	ldreqb \reg,[globalptr,#\label]
	.endm
	
	.macro streq_ reg,label
	streq \reg,[globalptr,#\label]
	.endm
	
	.macro streqb_ reg,label
	streqb \reg,[globalptr,#\label]
	.endm
	



	.macro ldrne_ reg,label
	ldrne \reg,[globalptr,#\label]
	.endm
	
	.macro ldrneb_ reg,label
	ldrneb \reg,[globalptr,#\label]
	.endm
	
	.macro strne_ reg,label
	strne \reg,[globalptr,#\label]
	.endm
	
	.macro strneb_ reg,label
	strneb \reg,[globalptr,#\label]
	.endm
	


	.macro ldrhi_ reg,label
	ldrhi \reg,[globalptr,#\label]
	.endm
	
	.macro ldrhib_ reg,label
	ldrhib \reg,[globalptr,#\label]
	.endm
	
	.macro strhi_ reg,label
	strhi \reg,[globalptr,#\label]
	.endm
	
	.macro strhib_ reg,label
	strhib \reg,[globalptr,#\label]
	.endm


	.macro ldrmi_ reg,label
	ldrmi \reg,[globalptr,#\label]
	.endm
	
	.macro ldrmib_ reg,label
	ldrmib \reg,[globalptr,#\label]
	.endm
	
	.macro strmi_ reg,label
	strmi \reg,[globalptr,#\label]
	.endm
	
	.macro strmib_ reg,label
	strmib \reg,[globalptr,#\label]
	.endm

	.macro ldrpl_ reg,label
	ldrpl \reg,[globalptr,#\label]
	.endm
	
	.macro ldrplb_ reg,label
	ldrplb \reg,[globalptr,#\label]
	.endm
	
	.macro strpl_ reg,label
	strpl \reg,[globalptr,#\label]
	.endm
	
	.macro strplb_ reg,label
	strplb \reg,[globalptr,#\label]
	.endm


	.macro ldrgt_ reg,label
	ldrgt \reg,[globalptr,#\label]
	.endm
	
	.macro ldrgtb_ reg,label
	ldrgtb \reg,[globalptr,#\label]
	.endm
	
	.macro strgt_ reg,label
	strgt \reg,[globalptr,#\label]
	.endm
	
	.macro strgtb_ reg,label
	strgtb \reg,[globalptr,#\label]
	.endm


	.macro ldrge_ reg,label
	ldrge \reg,[globalptr,#\label]
	.endm
	
	.macro ldrgeb_ reg,label
	ldrgeb \reg,[globalptr,#\label]
	.endm
	
	.macro strge_ reg,label
	strge \reg,[globalptr,#\label]
	.endm
	
	.macro strgeb_ reg,label
	strgeb \reg,[globalptr,#\label]
	.endm


	.macro ldrlt_ reg,label
	ldrlt \reg,[globalptr,#\label]
	.endm
	
	.macro ldrltb_ reg,label
	ldrltb \reg,[globalptr,#\label]
	.endm
	
	.macro strlt_ reg,label
	strlt \reg,[globalptr,#\label]
	.endm
	
	.macro strltb_ reg,label
	strltb \reg,[globalptr,#\label]
	.endm


	.macro ldrle_ reg,label
	ldrle \reg,[globalptr,#\label]
	.endm
	
	.macro ldrleb_ reg,label
	ldrleb \reg,[globalptr,#\label]
	.endm
	
	.macro strle_ reg,label
	strle \reg,[globalptr,#\label]
	.endm
	
	.macro strleb_ reg,label
	strleb \reg,[globalptr,#\label]
	.endm


	.macro ldrlo_ reg,label
	ldrlo \reg,[globalptr,#\label]
	.endm
	
	.macro ldrlob_ reg,label
	ldrlob \reg,[globalptr,#\label]
	.endm
	
	.macro strlo_ reg,label
	strlo \reg,[globalptr,#\label]
	.endm
	
	.macro strlob_ reg,label
	strlob \reg,[globalptr,#\label]
	.endm
	

	.macro adr_ reg,label
	add \reg,globalptr,#\label
	.endm
	
	.macro adrl_ reg,label
@	.if \label&0x80000000
@	sub \reg,globalptr,#((-(\label)) & 0xFF00FF00)
@	sub \reg,\reg,#((-(\label)) & 0x000000FF)
@	.else
	add \reg,globalptr,#((\label) & 0xFF00FF00)
	add \reg,\reg,#((\label) & 0x000000FF)
@	.endif
	.endm

	.macro adrnel_ reg,label
@	.if \label&0x80000000
@	subne \reg,globalptr,#((-(\label)) & 0xFF00FF00)
@	subne \reg,\reg,#((-(\label)) & 0x000000FF)
@	.else
	addne \reg,globalptr,#((\label) & 0xFF00FF00)
	addne \reg,\reg,#((\label) & 0x000000FF)
@	.endif
	.endm

Afterwards, you may need to change some stuff:
* Replace .include with #include so that devkitarm's makefile works better
* Get rid of any excess MAPs, the tools only support one MAP.
* Change any incbins to be relative to the "Build" folder of a devkitpro project
* Some complex math expressions may not work on Gnu assembler, maybe equate them before you use them
* If you use register names, .unreq them at the end of a source file
* Because ADR can not cross source files, you may need to make a master asm file that #includes all other asm code
* AREA directives probably need to be rewritten:

example: change this
	AREA wram_code0, CODE, READWRITE
to this
 .align
 .pool
 .section .iwram, "ax", %progbits
 .subsection 0
 .align
 .pool

* Get rid of 2_ prefix for binary numbers, replace with 0b
* Maybe remove any unnecessary .includes if you move your project to the 'master source file that includes everything' model


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