Volume 3: Instruction Reference
3:81
fmerge
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
3
].significand;
if (neg_sign_form) {
FR[
f
1
].exponent = FR[
f
3
].exponent;
FR[
f
1
].sign = !FR[
f
2
].sign;
} else if (sign_form) {
FR[
f
1
].exponent = FR[
f
3
].exponent;
FR[
f
1
].sign = FR[
f
2
].sign;
} else {
// sign_exp_form
FR[
f
1
].exponent = FR[
f
2
].exponent;
FR[
f
1
].sign = FR[
f
2
].sign;
}
}
fp_update_psr(
f
1
);
}
FP Exceptions:
None
Interruptions:
Illegal Operation fault
Disabled Floating-point Register fault
Summary of Contents for Itanium 9150M
Page 1: ......
Page 209: ...3 200 Volume 3 Instruction Reference padd Interruptions Illegal Operation fault...
Page 405: ...3 396 Volume 3 Resource and Dependency Semantics...
Page 406: ...3 397 Intel Itanium Architecture Software Developer s Manual Rev 2 3 Index...
Page 407: ...3 398 Intel Itanium Architecture Software Developer s Manual Rev 2 3...
Page 419: ...INDEX Index 12 Index for Volumes 1 2 3 and 4...
Page 420: ......
