if statement for signed value

[Farabi]

I recall somebody already answered it but I forget where it is, anyone can re-explain?

[qWord]

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.if eax < 0              ; unsigned compare - this condition will never become true

.if SDWORD ptr eax < 0   ;make signed dword-compare
(SWORD ptr, SBYTE ptr, SQWORD ptr)

[Farabi]

Thanks

[MichaelW]

What version(s) of ML recognize SQWORD?

[jj2007]

Version 9.0 recognises the MySQW SQWORD 123 but gives error A2070:invalid instruction operands for the .if:

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include \masm32\include\masm32rt.inc

.code
MyVar dd 123, 456
MySQW SQWORD 123

start: mov eax, offset MyVar
.if sqword ptr [eax]<0
nop
.endif
exit
end start


[qWord]

SQWORD ptr can be used with jwasm in 64Bit mode  :cheekygreen: - for ml it wont work.

[jj2007]

SQWORD ptr can be used with jwasm in 64Bit mode  :cheekygreen: - for ml it wont work.

There are the usual workarounds :lol

Code Select Expand

include \masm32\include\masm32rt.inc

.code
MyVar dd 123, 456
SQpos SQWORD 123
SQneg SQWORD -123

start:
mov eax, offset SQpos
.if sbyte ptr [eax+sqword-1]<0
print "SQpos is negative", 13, 10
.else
print "SQpos is positive", 13, 10
.endif
mov eax, offset SQneg
.if sbyte ptr [eax+sqword-1]<0
print "SQneg is negative", 13, 10
.else
print "SQneg is positive", 13, 10
.endif
inkey chr$(13, 10, 10, "Hit any key to get outta here")
exit
end start