Intel Itanium 9150M, Manual, Page: 152 / 420

Volume 3: Instruction Reference 3:143
getf
getf — Get Floating-point Value or Exponent or Significand
Format: (
qp
) getf.s
r
1
=
f
2
single_form M19
(
qp
) getf.d
r
1
=
f
2
double_form M19
(
qp
) getf.exp
r
1
=
f
2
exponent_form M19
(
qp
) getf.sig
r
1
=
f
2
significand_form M19
Description:
In the single and double forms, the value in FR
f
2
is converted into a single precision
(single_form) or double precision (double_form) memory representation and placed in
GR
r
1
, as shown in Figure 5-7 and Figure 5-8 on page 1:95 , respectively. In the
single_form, the most-significant 32 bits of GR
r
1
are set to 0.
In the exponent_form, the exponent field of FR
f
2
is copied to bits 16:0 of GR
r
1
and the
sign bit of the value in FR
f
2
is copied to bit 17 of GR r
1
. The most-significant 46-bits of
GR
r
1
are set to zero.
In the significand_form, the significand field of the value in FR
f
2
is copied to GR
r
1
For all forms, if FR
f
2
contains a NaTVal, then the NaT bit corresponding to GR
r
1
is set to
1.
Figure 2-23. Function of getf.exp
Figure 2-24. Function of getf.sig
s significand exponent FR f
2
GR r
1
0
0 16 18
17 1
46
63
significand exponent s FR f
2
GR r
1
0 63
64