patch-2.4.20 linux-2.4.20/arch/mips64/math-emu/dp_mul.c

• Lines: 181
• Date: Wed Dec 31 16:00:00 1969
• Orig file: linux-2.4.19/arch/mips64/math-emu/dp_mul.c
• Orig date: Mon Jul 2 13:56:40 2001

diff -urN linux-2.4.19/arch/mips64/math-emu/dp_mul.c linux-2.4.20/arch/mips64/math-emu/dp_mul.c
@@ -1,180 +0,0 @@
-/* IEEE754 floating point arithmetic
- * double precision: common utilities
- */
-/*
- * MIPS floating point support
- * Copyright (C) 1994-2000 Algorithmics Ltd.  All rights reserved.
- * http://www.algor.co.uk
- *
- * ########################################################################
- *
- *  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.
- *
- *  This program is distributed in the hope it will be useful, but WITHOUT
- *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- *  for more details.
- *
- *  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.
- *
- * ########################################################################
- */
-
-
-#include "ieee754dp.h"
-
-ieee754dp ieee754dp_mul(ieee754dp x, ieee754dp y)
-{
-	COMPXDP;
-	COMPYDP;
-
-	CLEARCX;
-
-	EXPLODEXDP;
-	EXPLODEYDP;
-
-	switch (CLPAIR(xc, yc)) {
-	case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_SNAN):
-		return ieee754dp_nanxcpt(ieee754dp_bestnan(x, y), "mul", x,
-					 y);
-
-	case CLPAIR(IEEE754_CLASS_QNAN, IEEE754_CLASS_SNAN):
-	case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_SNAN):
-	case CLPAIR(IEEE754_CLASS_NORM, IEEE754_CLASS_SNAN):
-	case CLPAIR(IEEE754_CLASS_DNORM, IEEE754_CLASS_SNAN):
-	case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_SNAN):
-		return ieee754dp_nanxcpt(y, "mul", x, y);
-
-	case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_QNAN):
-	case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_ZERO):
-	case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_NORM):
-	case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_DNORM):
-	case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_INF):
-		return ieee754dp_nanxcpt(x, "mul", x, y);
-
-	case CLPAIR(IEEE754_CLASS_QNAN, IEEE754_CLASS_QNAN):
-		return ieee754dp_bestnan(x, y);
-
-	case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_QNAN):
-	case CLPAIR(IEEE754_CLASS_NORM, IEEE754_CLASS_QNAN):
-	case CLPAIR(IEEE754_CLASS_DNORM, IEEE754_CLASS_QNAN):
-	case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_QNAN):
-		return y;
-
-	case CLPAIR(IEEE754_CLASS_QNAN, IEEE754_CLASS_ZERO):
-	case CLPAIR(IEEE754_CLASS_QNAN, IEEE754_CLASS_NORM):
-	case CLPAIR(IEEE754_CLASS_QNAN, IEEE754_CLASS_DNORM):
-	case CLPAIR(IEEE754_CLASS_QNAN, IEEE754_CLASS_INF):
-		return x;
-
-
-		/* Infinity handeling */
-
-	case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_ZERO):
-	case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_INF):
-		SETCX(IEEE754_INVALID_OPERATION);
-		return ieee754dp_xcpt(ieee754dp_indef(), "mul", x, y);
-
-	case CLPAIR(IEEE754_CLASS_NORM, IEEE754_CLASS_INF):
-	case CLPAIR(IEEE754_CLASS_DNORM, IEEE754_CLASS_INF):
-	case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_NORM):
-	case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_DNORM):
-	case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_INF):
-		return ieee754dp_inf(xs ^ ys);
-
-	case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_ZERO):
-	case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_NORM):
-	case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_DNORM):
-	case CLPAIR(IEEE754_CLASS_NORM, IEEE754_CLASS_ZERO):
-	case CLPAIR(IEEE754_CLASS_DNORM, IEEE754_CLASS_ZERO):
-		return ieee754dp_zero(xs ^ ys);
-
-
-	case CLPAIR(IEEE754_CLASS_DNORM, IEEE754_CLASS_DNORM):
-		DPDNORMX;
-
-	case CLPAIR(IEEE754_CLASS_NORM, IEEE754_CLASS_DNORM):
-		DPDNORMY;
-		break;
-
-	case CLPAIR(IEEE754_CLASS_DNORM, IEEE754_CLASS_NORM):
-		DPDNORMX;
-		break;
-
-	case CLPAIR(IEEE754_CLASS_NORM, IEEE754_CLASS_NORM):
-		break;
-	}
-	/* rm = xm * ym, re = xe+ye basicly */
-	assert(xm & DP_HIDDEN_BIT);
-	assert(ym & DP_HIDDEN_BIT);
-	{
-		int re = xe + ye;
-		int rs = xs ^ ys;
-		unsigned long long rm;
-
-		/* shunt to top of word */
-		xm <<= 64 - (DP_MBITS + 1);
-		ym <<= 64 - (DP_MBITS + 1);
-
-		/* multiply 32bits xm,ym to give high 32bits rm with stickness
-		 */
-
-		/* 32 * 32 => 64 */
-#define DPXMULT(x,y)	((unsigned long long)(x) * (unsigned long long)y)
-
-		{
-			unsigned lxm = xm;
-			unsigned hxm = xm >> 32;
-			unsigned lym = ym;
-			unsigned hym = ym >> 32;
-			unsigned long long lrm;
-			unsigned long long hrm;
-
-			lrm = DPXMULT(lxm, lym);
-			hrm = DPXMULT(hxm, hym);
-
-			{
-				unsigned long long t = DPXMULT(lxm, hym);
-				{
-					unsigned long long at =
-					    lrm + (t << 32);
-					hrm += at < lrm;
-					lrm = at;
-				}
-				hrm = hrm + (t >> 32);
-			}
-
-			{
-				unsigned long long t = DPXMULT(hxm, lym);
-				{
-					unsigned long long at =
-					    lrm + (t << 32);
-					hrm += at < lrm;
-					lrm = at;
-				}
-				hrm = hrm + (t >> 32);
-			}
-			rm = hrm | (lrm != 0);
-		}
-
-		/*
-		 * sticky shift down to normal rounding precision
-		 */
-		if ((signed long long) rm < 0) {
-			rm =
-			    (rm >> (64 - (DP_MBITS + 1 + 3))) |
-			    ((rm << (DP_MBITS + 1 + 3)) != 0);
-			re++;
-		} else {
-			rm =
-			    (rm >> (64 - (DP_MBITS + 1 + 3 + 1))) |
-			    ((rm << (DP_MBITS + 1 + 3 + 1)) != 0);
-		}
-		assert(rm & (DP_HIDDEN_BIT << 3));
-		DPNORMRET2(rs, re, rm, "mul", x, y);
-	}
-}