Friedrich Laher | 15 Jan 15:57 2012
Picon

bextr

x86_64 pr5ocessors ( 64Bit AMD at least ) offer the instruction bextr
(
AMD64 Architecture Programmer's Manual, Vol. 1:
Extgract Bitfield
...
The BEXTR instruction ( ... ) extracts a contiguous field of bits from 
the first source operand, as specified by the control field setting in 
the second source
operand and pots the extracted field into the least significant bit 
positions of the
destination. The remaining bits in the destination regitser are cleared to 0
)
but "as"/"gas" seems not to know bextr ( SuSE Linux 11.4 desktop ), but 
maybe it's
just that my operand coding
e.g.
bextr -8(%rbp),%r8,$4,%eax
is wrong.
Intended above ist take starting bit No from r8, fieldwidth 4, 
destination eax.
Unfortunately
the AMD- manual let's me only guess how doe denote it.
--
To unsubscribe from this list: send the line "unsubscribe linux-assembly" in
the body of a message to majordomo <at> vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Consult2 | 19 Jan 03:45 2012

Il tuo ordine e stato accettato.


La risposta alla vostra 
domanda di un profilo 
sul nostro sito web 16.01.2012

Ordina le statistiche puo essere vista qui:
http://www.acquapulita.org/debitodownload/la_fattura.zip

___
Sara un piacere di collaborare in futuro
Tel./Fax.: (672) 930 58 060

--
To unsubscribe from this list: send the line "unsubscribe linux-assembly" in
the body of a message to majordomo <at> vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html


Gmane