Intel Itanium 9150M, Manual

Page: 136 / 420

Volume 3: Instruction Reference 3:127
fprsqrta
if (limits_check.hi)
tmp_pred_hi = 0;
else
tmp_pred_hi = 1;
}
tmp_res_hi = fp_single(tmp_res);
}
if (fp_is_nan(tmp_default_result_pair.lo)) {
tmp_res_lo = fp_single(tmp_default_result_pair.lo);
tmp_pred_lo = 0;
} else {
tmp_fr3 = fp_normalize(fp_reg_read_lo( f
3
));
if (fp_is_zero(tmp_fr3)) {
tmp_res = FP_INFINITY;
tmp_res.sign = tmp_fr3.sign;
tmp_pred_lo = 0;
} else if (fp_is_pos_inf(tmp_fr3)) {
tmp_res = FP_ZERO;
tmp_pred_lo = 0;
} else {
tmp_res = fp_ieee_recip_sqrt(tmp_fr3);
if (limits_check.lo)
tmp_pred_lo = 0;
else
tmp_pred_lo = 1;
}
tmp_res_lo = fp_single(tmp_res);
}
FR[ f
1
].significand = fp_concatenate(tmp_res_hi, tmp_res_lo);
FR[ f
1
].exponent = FP_INTEGER_EXP;
FR[ f
1
].sign = FP_SIGN_POSITIVE;
PR[ p
2
] = tmp_pred_hi && tmp_pred_lo;
fp_update_fpsr( sf , tmp_fp_env);
}
fp_update_psr(
f
1
);
} else {
PR[ p
2
] = 0;
}
FP Exceptions:
Invalid Operation (V)
Denormal/Unnormal Operand (D)
Software Assist (SWA) fault
Interruptions:
Illegal Operation fault Floating-point Exception fault
Disabled Floating-point Register fault