Hitachi SH7750 Programming Manual page 270

} tmpx;
if(FPSCR_PR == 0) {
tmpf.f = FR[n]; /* save destination value */
dstf.f /= FR[m]; /* round toward nearest or even */
tmpd.d = dstf.f; /* convert single to double */
tmpd.d *= FR[m];
if(tmpf.f != tmpd.d) set_I();
if((tmpf.f < tmpd.d) && (SPSCR_RM == 1))
dstf.l -= 1; /* round toward zero */
check_single_exception(&FR[n], dstf.f);
}else {
tmpd.d = DR[n>>1]; /* save destination value */
dstd.d /= DR[m>>1]; /* round toward nearest or even */
tmpx.x = dstd.d; /* convert double to int double */
tmpx.x *= DR[m>>1];
if(tmpd.d != tmpx.x) set_I();
if((tmpd.d < tmpx.x) && (SPSCR_RM == 1)) {
dstd.l[1] -= 1; /* round toward zero */
if(dstd.l[1] == 0xffffffff) dstd.l[0] -= 1;
}
check_double_exception(&DR[n>>1], dstd.d);
}
}
FDIV Special Cases
FRm,DRm
NORM
NORM DIV
+0 DZ
–0
+INF 0
–INF
DENORM
qNaN
sNaN
Note: When DN = 1, the value of a denormalized number is treated as 0.
Rev. 2.0, 03/99, page 256 of 396
FRn,DRn
+0 –0
0
Invalid
+0 –0
–0 +0
+INF –INF DENORM
INF
+INF –INF
–INF +INF
Invalid
qNaN
Error
DZ
Error
qNaN
sNaN
Invalid