[not a bug] fasmw 1.73.25 bug DQ and cvtsi2ss

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Roman

Joined: 21 Apr 2012
Posts: 1850

Roman 10 Dec 2020, 11:02

Code:

align 8
mousePos dq 0
invoke GetCursorPos,mousePos
cvtsi2ss xmm1,[mousePos]
cvtsi2ss xmm2,[mousePos+4]

Incorrect value in xmm1 and xmm2

This work right

Code:

align 8
mousePos dd 0,0
invoke GetCursorPos,mousePos
cvtsi2ss xmm1,[mousePos]
cvtsi2ss xmm2,[mousePos+4]

10 Dec 2020, 11:02

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20454
Location: In your JS exploiting you and your system

revolution 10 Dec 2020, 11:37

The 64-bit qword value is a valid assembly instruction. fasm did exactly what you asked.

If you want to override the size then:

Code:

cvtsi2ss xmm1,dword[mousePos]

Please read the manuals before claiming to find bugs.

10 Dec 2020, 11:37

Roman

Joined: 21 Apr 2012
Posts: 1850

Roman 10 Dec 2020, 16:43

Quote:

before claiming

I just only repost my problem.

Thanks for you help.

I thinked cvtsi2ss xmm1,[mousePos] always dword !

10 Dec 2020, 16:43

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