Intel Itanium 9150M, Manual, Page: 111 / 420

3:102 Volume 3: Instruction Reference
fpcmp
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 {
fpcmp_exception_fault_check( f
2
, f
3
, frel , sf, &tmp_fp_env);
if (fp_raise_fault(tmp_fp_env))
fp_exception_fault(fp_decode_fault(tmp_fp_env));
tmp_fr2 = fp_reg_read_hi( f
2
);
tmp_fr3 = fp_reg_read_hi( f
3
);
if ( frel == ‘eq’) tmp_rel = fp_equal(tmp_fr2, tmp_fr3);
else if ( frel == ‘lt’) tmp_rel = fp_less_than(tmp_fr2, tmp_fr3);
else if ( frel == ‘le’) tmp_rel = fp_lesser_or_equal(tmp_fr2,
tmp_fr3);
else if ( frel == ‘gt’) tmp_rel = fp_less_than(tmp_fr3, tmp_fr2);
else if ( frel == ‘ge’) tmp_rel = fp_lesser_or_equal(tmp_fr3,
tmp_fr2);
else if ( frel == ‘unord’)tmp_rel = fp_unordered(tmp_fr2, tmp_fr3);
else if ( frel == ‘neq’) tmp_rel = !fp_equal(tmp_fr2, tmp_fr3);
else if ( frel == ‘nlt’) tmp_rel = !fp_less_than(tmp_fr2, tmp_fr3);
else if ( frel == ‘nle’) tmp_rel = !fp_lesser_or_equal(tmp_fr2,
tmp_fr3);
else if ( frel == ‘ngt’) tmp_rel = !fp_less_than(tmp_fr3, tmp_fr2);
else if ( frel == ‘nge’) tmp_rel = !fp_lesser_or_equal(tmp_fr3,
tmp_fr2);
else tmp_rel = !fp_unordered(tmp_fr2,
tmp_fr3); //‘ord’
tmp_res_hi = (tmp_rel ? 0xFFFFFFFF : 0x00000000);
tmp_fr2 = fp_reg_read_lo( f
2
);
tmp_fr3 = fp_reg_read_lo( f
3
);
if ( frel == ‘eq’) tmp_rel = fp_equal(tmp_fr2, tmp_fr3);
else if ( frel == ‘lt’) tmp_rel = fp_less_than(tmp_fr2, tmp_fr3);
else if ( frel == ‘le’) tmp_rel = fp_lesser_or_equal(tmp_fr2,
tmp_fr3);
else if ( frel == ‘gt’) tmp_rel = fp_less_than(tmp_fr3, tmp_fr2);
else if ( frel == ‘ge’) tmp_rel = fp_lesser_or_equal(tmp_fr3,
tmp_fr2);
else if ( frel == ‘unord’)tmp_rel = fp_unordered(tmp_fr2, tmp_fr3);
else if ( frel == ‘neq’) tmp_rel = !fp_equal(tmp_fr2, tmp_fr3);
else if ( frel == ‘nlt’) tmp_rel = !fp_less_than(tmp_fr2, tmp_fr3);
else if ( frel == ‘nle’) tmp_rel = !fp_lesser_or_equal(tmp_fr2,
tmp_fr3);
else if ( frel == ‘ngt’) tmp_rel = !fp_less_than(tmp_fr3, tmp_fr2);
else if ( frel == ‘nge’) tmp_rel = !fp_lesser_or_equal(tmp_fr3,
tmp_fr2);
else tmp_rel = !fp_unordered(tmp_fr2,
tmp_fr3); //‘ord’