Intel Itanium 9150M, Manual

Page: 151 / 420

3:142 Volume 3: Instruction Reference
fxor
fxor — Floating-point Exclusive Or
Format: (
qp
) fxor
f
1
=
f
2
,
f
3
F9
Description:
The bit-wise logical exclusive-OR of the significand fields of FR
f
2
and FR
f
3
is computed.
The resulting value is stored in the significand field of FR
f
1
. The exponent field of FR
f
1
is set to the biased exponent for 2.0
63
(0x1003E) and the sign field of FR
f
1
is set to
positive (0).
If either of FR
f
2
or FR
f
3
is a NaTVal, FR
f
1
is set to NaTVal instead of the computed
result.
Operation: if (PR[ qp ]) {
fp_check_target_register( f
1
);
if (tmp_isrcode = fp_reg_disabled( f
1
, f
2
, f
3
, 0))
disabled_fp_register_fault(tmp_isrcode, 0);
if (fp_is_natval(FR[ f
2
]) || fp_is_natval(FR[ f
3
])) {
FR[ f
1
] = NATVAL;
} else {
FR[ f
1
].significand = FR[ f
2
].significand ^ FR[ f
3
].significand;
FR[ f
1
].exponent = FP_INTEGER_EXP;
FR[ f
1
].sign = FP_SIGN_POSITIVE;
}
fp_update_psr( f
1
);
}
FP Exceptions:
None
Interruptions:
Illegal Operation fault Disabled Floating-point Register fault