Sse convert char txt to Unicode ?

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Roman

Joined: 21 Apr 2012
Posts: 1792

Roman 14 Aug 2023, 14:02

Code:

Txt dB "12345678"
;in code
movups xmm1,dqword [Txt]

Do something and get in xmm1 Unicode text "1 2 3 4 5 6 7 8 "
And do back "1 2 3 4 5 6 7 8 " convert to "12345678"

How do this ?
Pshufb ?

14 Aug 2023, 14:02

Furs

Joined: 04 Mar 2016
Posts: 2502

Furs 14 Aug 2023, 14:33

You could also use pmovzxbw.

14 Aug 2023, 14:33

Roman

Joined: 21 Apr 2012
Posts: 1792

Roman 14 Aug 2023, 14:42

Or this PMOVSXBW

14 Aug 2023, 14:42

Roman

Joined: 21 Apr 2012
Posts: 1792

Roman 14 Aug 2023, 14:42

How do PMOVSXWB ? Convert Unicode to char

14 Aug 2023, 14:42

Roman

Joined: 21 Apr 2012
Posts: 1792

Roman 14 Aug 2023, 15:02

Convert Unicode to char:
PACKUSWB xmm1, xmm1

14 Aug 2023, 15:02

Furs

Joined: 04 Mar 2016
Posts: 2502

Furs 15 Aug 2023, 12:30

Roman wrote:

Or this PMOVSXBW

That's not correct. It sign-extends, so any ASCII char > 127 will have upper byte (of UTF-16) set to all 1s.

15 Aug 2023, 12:30

Flier-Mate

Joined: 26 May 2023
Posts: 88

Flier-Mate 16 Aug 2023, 09:25

I got an error when trying to run PMOVZXBW while debugging in IDA Free, later I figured out that maybe my old laptop doesn't support SSE 4.1 instruction. Razz

Description:	Error in executing PMOVZXBW in IDA Free
Filesize:	6.89 KB
Viewed:	2206 Time(s)

16 Aug 2023, 09:25

Roman

Joined: 21 Apr 2012
Posts: 1792

Roman 16 Aug 2023, 10:48

I think yes.
Not supported PMOVZXBW your pc

16 Aug 2023, 10:48

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