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Title: MASM struct bit fields?
Post by: dajudge on January 31, 2005, 03:53:42 PM

Hi all, I am currently porting a ASM file written with a non-MASM32 assembler and have problems with bitfields (at least I believe they are). How would the equivalent code be in MASM32?

Code Select


struc JITC
	clientPages resd 1
	
	tlb_code_0_eff resd TLB_ENTRIES
	tlb_data_0_eff resd TLB_ENTRIES
	tlb_data_8_eff resd TLB_ENTRIES
	tlb_code_0_phys resd TLB_ENTRIES
	tlb_data_0_phys resd TLB_ENTRIES
	tlb_data_8_phys resd TLB_ENTRIES
	resd 1
	tlb_code_0_hits resq 1
	tlb_data_0_hits resq 1
	tlb_data_8_hits resq 1
	tlb_code_0_misses resq 1
	tlb_data_0_misses resq 1
	tlb_data_8_misses resq 1

	nativeReg resd 8        ; FIXME: resb?
	
	nativeRegState resd 8   ; FIXME: resb?
	
	nativeFlags resd 1

	nativeFlagsState resd 1
	nativeCarryState resd 1
	
	clientReg resd 600
	
	nativeRegsList resd 8
		 
	LRUreg resd 1
	MRUreg resd 1

	LRUpage resd 1
	MRUpage resd 1

	freeFragmentsList resd 1

	freeClientPages resd 1
	
	translationCache resd 1	
endstruc

Thanks,
Alex

Title: Re: MASM struct bit fields?
Post by: raymond on January 31, 2005, 05:59:32 PM

I would "guess" that
resd may stand for "reserve dword" and
resq may stand for "reserve qword".
Then the number following those would be the quantity to reserve.
The TLB_ENTRIES may be an equate.

Raymond

Title: Re: MASM struct bit fields?
Post by: thomasantony on February 02, 2005, 01:21:53 PM

Hi,
For resd, in MASM u use for eg.

Code Select


clientPages dd 0

for resd 1 and

Code Select


tlb_code_0_eff dd TLB_ENTRIES dup (0)
; or
tlb_code_0_eff dd TLB_ENTRIES dup (?)

for multiple dwords. I believe the code you gave is NASM or FASM format

Thomas Antony :U

Title: Re: MASM struct bit fields?
Post by: MichaelW on February 02, 2005, 09:57:24 PM

From the NASM 0.98.35 documentation:

Quote
3.2 Pseudo−Instructions
Pseudo−instructions are things which, though not real x86 machine instructions, are used in the
instruction field anyway because that's the most convenient place to put them. The current
pseudo−instructions are DB, DW, DD, DQ and DT, their uninitialised counterparts RESB, RESW,
RESD, RESQ and REST, the INCBIN command, the EQU command, and the TIMES prefix.

So if the sample code is in fact for NASM, the MASM equivalents would be:

"resd" -> "DWORD ?" or "DD ?"
"resq" -> "QWORD ?" or "DQ ?"
etc

Title: Re: MASM struct bit fields?
Post by: Kestrel on February 03, 2005, 07:49:31 AM

How to convert MASM struct to NASM and use them
http://sapp.telepac.pt/win32asm/MASMstruct2NASM.html

Title: Re: MASM struct bit fields?
Post by: thomasantony on February 03, 2005, 10:35:15 AM

Sorry abt the mistake!! :snooty: :( :snooty:

Thomas Antony :boohoo:

Title: Re: MASM struct bit fields?
Post by: P1 on February 04, 2005, 10:30:37 PM

Welcome Alex, :U

You will find some the best people in the world, come here to get answers, as well as give them.

If you like getting and giving help in Assembler, this is the place for you!! :clap:

Look forward to you participating with us. :thumbu

Is this the original code?
http://cvs.sf.net/viewcvs.py/pearpc/pearpc/src/cpu_jitc_x86/Attic/jitc_mmu.asm?rev=1.11
This part of the PearPC on SourceForge.

It would have been nice, to tell us a little bit more about it and yourself.

We are here for you, in developing the Windows version of PearPC.

Regards, P1 :8)

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General Forums => The Workshop => Topic started by: dajudge on January 31, 2005, 03:53:42 PM