Intel ITANIUM ARCHITECTURE - SOFTWARE DEVELOPERS MANUAL VOLUME 1 REV 2.3 Manual page 1021

fpnmpy
fpnmpy — Floating-point Parallel Negative Multiply
( ) fpnmpy.
Format: qp
The pair of products of the pairs of single precision values in the significand fields of FR
Description:
and FR
f f
3
are then rounded to single precision using the rounding mode specified by FPSR.sf.rc.
The pair of rounded results are stored in the significand field of FR
of FR is set to the biased exponent for 2.0
f
1
set to positive (0).
If either FR
The mnemonic values for sf are given in
The encodings and interpretation for the status field's rc are given in
page 1:90.
Operation: See "fpnma — Floating-point Parallel Negative Multiply Add" on page 3:120.
3:122
= ,
sf f f f
1 3 4
are computed to infinite precision and then negated. The resulting values
4
or FR is a NaTVal, FR
f f
3 4
pseudo-op of: ( ) fpnma.
qp
63
(0x1003E) and the sign field of FR
is set to NaTVal instead of the computed results.
f
1
Table 2-23 on page 3:56.
= , ,f0
sf f f f
1 3 4
. The exponent field
f
1
is
f
1
Table 5-6 on
Volume 3: Instruction Reference