Intel ITANIUM ARCHITECTURE - SOFTWARE DEVELOPERS MANUAL VOLUME 1 REV 2.3 Manual page 1169

unpack
unpack — Unpack
( ) unpack1.h
Format: qp
( ) unpack2.h
qp
( ) unpack4.h
qp
( ) unpack1.l
qp
( ) unpack2.l
qp
( ) unpack4.l
qp
The data elements of GR
Description:
high_form, the most significant elements of each source register are selected, while in
the low_form the least significant elements of each source register are selected.
Elements are selected alternately from the source registers.
3:270
= ,
r r r
1 2 3
= ,
r r r
1 2 3
= ,
r r r
1 2 3
= ,
r r r
1 2 3
= ,
r r r
1 2 3
= ,
r r r
1 2 3
and are unpacked, and the result placed in GR
r r
2 3
one_byte_form, high_form
two_byte_form, high_form
four_byte_form, high_form
one_byte_form, low_form
two_byte_form, low_form
four_byte_form, low_form
. In the
r
1
Volume 3: Instruction Reference
I2
I2
I2
I2
I2
I2