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Diffstat (limited to 'arch/mips/math-emu/sp_div.c')
-rw-r--r--arch/mips/math-emu/sp_div.c93
1 files changed, 45 insertions, 48 deletions
diff --git a/arch/mips/math-emu/sp_div.c b/arch/mips/math-emu/sp_div.c
index d7747928c95..721f317aa87 100644
--- a/arch/mips/math-emu/sp_div.c
+++ b/arch/mips/math-emu/sp_div.c
@@ -5,8 +5,6 @@
* MIPS floating point support
* Copyright (C) 1994-2000 Algorithmics Ltd.
*
- * ########################################################################
- *
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
@@ -18,23 +16,24 @@
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * ########################################################################
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-
#include "ieee754sp.h"
-ieee754sp ieee754sp_div(ieee754sp x, ieee754sp y)
+union ieee754sp ieee754sp_div(union ieee754sp x, union ieee754sp y)
{
+ unsigned rm;
+ int re;
+ unsigned bm;
+
COMPXSP;
COMPYSP;
EXPLODEXSP;
EXPLODEYSP;
- CLEARCX;
+ ieee754_clearcx();
FLUSHXSP;
FLUSHYSP;
@@ -51,8 +50,8 @@ ieee754sp ieee754sp_div(ieee754sp x, ieee754sp y)
case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_NORM):
case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_DNORM):
case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_INF):
- SETCX(IEEE754_INVALID_OPERATION);
- return ieee754sp_nanxcpt(ieee754sp_indef(), "div", x, y);
+ ieee754_setcx(IEEE754_INVALID_OPERATION);
+ return ieee754sp_nanxcpt(ieee754sp_indef());
case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_QNAN):
case CLPAIR(IEEE754_CLASS_NORM, IEEE754_CLASS_QNAN):
@@ -68,12 +67,12 @@ ieee754sp ieee754sp_div(ieee754sp x, ieee754sp y)
return x;
- /* Infinity handling
- */
-
+ /*
+ * Infinity handling
+ */
case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_INF):
- SETCX(IEEE754_INVALID_OPERATION);
- return ieee754sp_xcpt(ieee754sp_indef(), "div", x, y);
+ ieee754_setcx(IEEE754_INVALID_OPERATION);
+ return ieee754sp_indef();
case CLPAIR(IEEE754_CLASS_NORM, IEEE754_CLASS_INF):
case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_INF):
@@ -85,17 +84,17 @@ ieee754sp ieee754sp_div(ieee754sp x, ieee754sp y)
case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_DNORM):
return ieee754sp_inf(xs ^ ys);
- /* Zero handling
- */
-
+ /*
+ * Zero handling
+ */
case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_ZERO):
- SETCX(IEEE754_INVALID_OPERATION);
- return ieee754sp_xcpt(ieee754sp_indef(), "div", x, y);
+ ieee754_setcx(IEEE754_INVALID_OPERATION);
+ return ieee754sp_indef();
case CLPAIR(IEEE754_CLASS_NORM, IEEE754_CLASS_ZERO):
case CLPAIR(IEEE754_CLASS_DNORM, IEEE754_CLASS_ZERO):
- SETCX(IEEE754_ZERO_DIVIDE);
- return ieee754sp_xcpt(ieee754sp_inf(xs ^ ys), "div", x, y);
+ ieee754_setcx(IEEE754_ZERO_DIVIDE);
+ return ieee754sp_inf(xs ^ ys);
case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_NORM):
case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_DNORM):
@@ -122,35 +121,33 @@ ieee754sp ieee754sp_div(ieee754sp x, ieee754sp y)
xm <<= 3;
ym <<= 3;
- {
- /* now the dirty work */
-
- unsigned rm = 0;
- int re = xe - ye;
- unsigned bm;
-
- for (bm = SP_MBIT(SP_MBITS + 2); bm; bm >>= 1) {
- if (xm >= ym) {
- xm -= ym;
- rm |= bm;
- if (xm == 0)
- break;
- }
- xm <<= 1;
- }
- rm <<= 1;
- if (xm)
- rm |= 1; /* have remainder, set sticky */
+ /* now the dirty work */
- assert(rm);
+ rm = 0;
+ re = xe - ye;
- /* normalise rm to rounding precision ?
- */
- while ((rm >> (SP_MBITS + 3)) == 0) {
- rm <<= 1;
- re--;
+ for (bm = SP_MBIT(SP_FBITS + 2); bm; bm >>= 1) {
+ if (xm >= ym) {
+ xm -= ym;
+ rm |= bm;
+ if (xm == 0)
+ break;
}
+ xm <<= 1;
+ }
+
+ rm <<= 1;
+ if (xm)
+ rm |= 1; /* have remainder, set sticky */
- SPNORMRET2(xs == ys ? 0 : 1, re, rm, "div", x, y);
+ assert(rm);
+
+ /* normalise rm to rounding precision ?
+ */
+ while ((rm >> (SP_FBITS + 3)) == 0) {
+ rm <<= 1;
+ re--;
}
+
+ return ieee754sp_format(xs == ys ? 0 : 1, re, rm);
}