diff options
Diffstat (limited to 'arch/mips/math-emu/dp_tint.c')
| -rw-r--r-- | arch/mips/math-emu/dp_tint.c | 69 | 
1 files changed, 26 insertions, 43 deletions
diff --git a/arch/mips/math-emu/dp_tint.c b/arch/mips/math-emu/dp_tint.c index 0ebe8598b94..6ffc336c530 100644 --- a/arch/mips/math-emu/dp_tint.c +++ b/arch/mips/math-emu/dp_tint.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. @@ -18,20 +16,21 @@   *   *  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 <linux/kernel.h>  #include "ieee754dp.h" -int ieee754dp_tint(ieee754dp x) +int ieee754dp_tint(union ieee754dp x)  { +	u64 residue; +	int round; +	int sticky; +	int odd; +  	COMPXDP; -	CLEARCX; +	ieee754_clearcx();  	EXPLODEXDP;  	FLUSHXDP; @@ -40,10 +39,12 @@ int ieee754dp_tint(ieee754dp x)  	case IEEE754_CLASS_SNAN:  	case IEEE754_CLASS_QNAN:  	case IEEE754_CLASS_INF: -		SETCX(IEEE754_INVALID_OPERATION); -		return ieee754si_xcpt(ieee754si_indef(), "dp_tint", x); +		ieee754_setcx(IEEE754_INVALID_OPERATION); +		return ieee754si_indef(); +  	case IEEE754_CLASS_ZERO:  		return 0; +  	case IEEE754_CLASS_DNORM:  	case IEEE754_CLASS_NORM:  		break; @@ -51,44 +52,39 @@ int ieee754dp_tint(ieee754dp x)  	if (xe > 31) {  		/* Set invalid. We will only use overflow for floating  		   point overflow */ -		SETCX(IEEE754_INVALID_OPERATION); -		return ieee754si_xcpt(ieee754si_indef(), "dp_tint", x); +		ieee754_setcx(IEEE754_INVALID_OPERATION); +		return ieee754si_indef();  	}  	/* oh gawd */ -	if (xe > DP_MBITS) { -		xm <<= xe - DP_MBITS; -	} else if (xe < DP_MBITS) { -		u64 residue; -		int round; -		int sticky; -		int odd; - +	if (xe > DP_FBITS) { +		xm <<= xe - DP_FBITS; +	} else if (xe < DP_FBITS) {  		if (xe < -1) {  			residue = xm;  			round = 0;  			sticky = residue != 0;  			xm = 0;  		} else { -			residue = xm << (64 - DP_MBITS + xe); +			residue = xm << (64 - DP_FBITS + xe);  			round = (residue >> 63) != 0;  			sticky = (residue << 1) != 0; -			xm >>= DP_MBITS - xe; +			xm >>= DP_FBITS - xe;  		}  		/* Note: At this point upper 32 bits of xm are guaranteed  		   to be zero */  		odd = (xm & 0x1) != 0x0;  		switch (ieee754_csr.rm) { -		case IEEE754_RN: +		case FPU_CSR_RN:  			if (round && (sticky || odd))  				xm++;  			break; -		case IEEE754_RZ: +		case FPU_CSR_RZ:  			break; -		case IEEE754_RU:	/* toward +Infinity */ +		case FPU_CSR_RU:	/* toward +Infinity */  			if ((round || sticky) && !xs)  				xm++;  			break; -		case IEEE754_RD:	/* toward -Infinity */ +		case FPU_CSR_RD:	/* toward -Infinity */  			if ((round || sticky) && xs)  				xm++;  			break; @@ -96,27 +92,14 @@ int ieee754dp_tint(ieee754dp x)  		/* look for valid corner case 0x80000000 */  		if ((xm >> 31) != 0 && (xs == 0 || xm != 0x80000000)) {  			/* This can happen after rounding */ -			SETCX(IEEE754_INVALID_OPERATION); -			return ieee754si_xcpt(ieee754si_indef(), "dp_tint", x); +			ieee754_setcx(IEEE754_INVALID_OPERATION); +			return ieee754si_indef();  		}  		if (round || sticky) -			SETCX(IEEE754_INEXACT); +			ieee754_setcx(IEEE754_INEXACT);  	}  	if (xs)  		return -xm;  	else  		return xm;  } - - -unsigned int ieee754dp_tuns(ieee754dp x) -{ -	ieee754dp hb = ieee754dp_1e31(); - -	/* what if x < 0 ?? */ -	if (ieee754dp_lt(x, hb)) -		return (unsigned) ieee754dp_tint(x); - -	return (unsigned) ieee754dp_tint(ieee754dp_sub(x, hb)) | -	    ((unsigned) 1 << 31); -}  | 
