Print Page - retrieve a qword's address in a macro

Title: retrieve a qword's address in a macro
Post by: gelatine1 on October 24, 2015, 07:24:35 AM

Another macro question... So I created some working code working with real4 (see previous macro posts fom me..) and now I also wanted to created a similar macro for real8. I now have this :

Code Select


procR8 MACRO prc:REQ,args:VARARG
	LOCAL item,txt,temp
	txt TEXTEQU <prc>
	FOR item, <args>
		IF ISFLOAT?(item) ;name says it all.
			temp EQU offset <FLT8(item)>
			% echo temp
			txt CATSTR txt,<,> , <[%temp]> ,<,>, <[%temp+4]> ;Something wrong here
		ELSE
			txt CATSTR txt,<,> , <item>
		ENDIF
    ENDM
	%echo <txt>
	invoke txt
ENDM

below is the FLT8 macro but it's not so important to read this (just in case..)

Code Select



gfl_glb_cntr8 = 0
FLT8 MACRO lit:REQ  ;Thanks to qword!
LOCAL lbl

	grc_const_found8 = 0
	grc_cntr8 = 0
	WHILE grc_cntr8 LT gfl_glb_cntr8
	%	IFIDN <&lit>,<@CatStr(<const_flt8__>,%grc_cntr8)>
			grc_const_found8 = -1
			EXITM
		ENDIF
		grc_cntr8 = grc_cntr8 + 1
	ENDM
	IF grc_const_found8 EQ 0
		.const
			lbl REAl8 lit
		.code
		@CatStr(<const_flt8__>,%gfl_glb_cntr8) TEXTEQU <&lit>
		@CatStr(<const_flt8_lbl__>,%gfl_glb_cntr8) TEXTEQU <lbl>
		gfl_glb_cntr8 = gfl_glb_cntr8 + 1
		EXITM <lbl>
	ELSE
		EXITM @CatStr(<const_flt8_lbl__>,%grc_cntr8)
	ENDIF
ENDM

So in the procR8 macro I would like to push the QWord / real8 value onto the stack. Because I read that it is not possible to push 64 bits directly onto the stack I decided to get the address of the real8 value and then use addres,address+4 in the invoke at the end. But clearly the code I have is not getting/using that address in the right way. What would be the correct way to do this ?

thanks in advance (once again..)

Title: Re: retrieve a qword's address in a macro
Post by: qWord on October 26, 2015, 01:25:17 AM

Quote from: gelatine1 on October 24, 2015, 07:24:35 AMtemp EQU offset <FLT8(item)>

RTFM

Code Select

temp TEXTEQU FLT8(item)
...
push temp[4]
push temp[0]

Title: Re: retrieve a qword's address in a macro
Post by: gelatine1 on October 26, 2015, 10:24:16 PM

Quote from: qWord on October 26, 2015, 01:25:17 AM
RTFM

Thanks, What manual do you suggest ? the following code was what did the trick

Code Select


temp TEXTEQU FLT8(item)
...
push dword ptr temp[4]
push dword ptr temp[0]

Title: Re: retrieve a qword's address in a macro
Post by: dedndave on October 28, 2015, 01:34:56 AM

he's probably refering to the masm programmers ref manual
which isn't particularly well written in my opinion, but, the info is there if you read it enough times

Title: Re: retrieve a qword's address in a macro
Post by: qWord on October 29, 2015, 12:13:35 AM

The user Shosen from the old board did create PDFs from the original Word Documents (http://www.masmforum.com/board/index.php?topic=5433.45). I did upload the zip file again: MASM_6.1_Manuals_[High_Quality_PDF] (http://www.file-upload.net/download-11002049/MASM_6.1_Manuals_High_Quality_PDF.zip.html)

To learn macro writing, first read Chapter 9 in the Programmer's guide.
If syntax questions come up, also take a look in the MASM Reference (Reference.pdf).

Title: Re: retrieve a qword's address in a macro
Post by: GoneFishing on October 29, 2015, 12:25:12 AM

@Qword:
Do you have MASM_6.1_Manual_Artworks_[EPS_Format].zip archive that Shosen was refering to in that thread?

The MASM Forum

General => The Campus => Topic started by: gelatine1 on October 24, 2015, 07:24:35 AM