Intel ITANIUM ARCHITECTURE - SOFTWARE DEVELOPERS MANUAL VOLUME 1 REV 2.3 Manual page 1108

pmax — Parallel Maximum
( ) pmax1.u
Format: qp
( ) pmax2
qp
The maximum of the two source operands is placed in the result register. In the
Description:
one_byte_form, each unsigned 8-bit element of GR
corresponding unsigned 8-bit element of GR
the corresponding 8-bit element of GR
element of GR
the greater of the two is placed in the corresponding 16-bit element of GR
Figure 2-34.
GR r :
3
GR r :
2
GR r :
1
Volume 3: Instruction Reference
= ,
r r r
1 2 3
= ,
r r r
1 2 3
is compared with the corresponding signed 16-bit element of GR
r
2
Parallel Maximum Examples
< < < < <
<
T F T T F F
pmax1.u
is compared with the
r
2
and the greater of the two is placed in
r
3
. In the two_byte_form, each signed 16-bit
r
1
GR r :
3
GR r :
2
<
<
<
True
F T
GR r :
1
pmax
one_byte_form
two_byte_form
r
3
.
r
1
< < <
False True True
pmax2
I2
I2
and
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