diff options
Diffstat (limited to 'arch/mips/math-emu/sp_tint.c')
| -rw-r--r-- | arch/mips/math-emu/sp_tint.c | 67 | 
1 files changed, 25 insertions, 42 deletions
diff --git a/arch/mips/math-emu/sp_tint.c b/arch/mips/math-emu/sp_tint.c index 0fe9acc7716..091299a3179 100644 --- a/arch/mips/math-emu/sp_tint.c +++ b/arch/mips/math-emu/sp_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 "ieee754sp.h" -int ieee754sp_tint(ieee754sp x) +int ieee754sp_tint(union ieee754sp x)  { +	u32 residue; +	int round; +	int sticky; +	int odd; +  	COMPXSP; -	CLEARCX; +	ieee754_clearcx();  	EXPLODEXSP;  	FLUSHXSP; @@ -40,10 +39,12 @@ int ieee754sp_tint(ieee754sp x)  	case IEEE754_CLASS_SNAN:  	case IEEE754_CLASS_QNAN:  	case IEEE754_CLASS_INF: -		SETCX(IEEE754_INVALID_OPERATION); -		return ieee754si_xcpt(ieee754si_indef(), "sp_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; @@ -54,18 +55,13 @@ int ieee754sp_tint(ieee754sp x)  			return -0x80000000;  		/* Set invalid. We will only use overflow for floating  		   point overflow */ -		SETCX(IEEE754_INVALID_OPERATION); -		return ieee754si_xcpt(ieee754si_indef(), "sp_tint", x); +		ieee754_setcx(IEEE754_INVALID_OPERATION); +		return ieee754si_indef();  	}  	/* oh gawd */ -	if (xe > SP_MBITS) { -		xm <<= xe - SP_MBITS; +	if (xe > SP_FBITS) { +		xm <<= xe - SP_FBITS;  	} else { -		u32 residue; -		int round; -		int sticky; -		int odd; -  		if (xe < -1) {  			residue = xm;  			round = 0; @@ -76,51 +72,38 @@ int ieee754sp_tint(ieee754sp x)  			* so we do it in two steps. Be aware that xe  			* may be -1 */  			residue = xm << (xe + 1); -			residue <<= 31 - SP_MBITS; +			residue <<= 31 - SP_FBITS;  			round = (residue >> 31) != 0;  			sticky = (residue << 1) != 0; -			xm >>= SP_MBITS - xe; +			xm >>= SP_FBITS - xe;  		}  		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;  		}  		if ((xm >> 31) != 0) {  			/* This can happen after rounding */ -			SETCX(IEEE754_INVALID_OPERATION); -			return ieee754si_xcpt(ieee754si_indef(), "sp_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 ieee754sp_tuns(ieee754sp x) -{ -	ieee754sp hb = ieee754sp_1e31(); - -	/* what if x < 0 ?? */ -	if (ieee754sp_lt(x, hb)) -		return (unsigned) ieee754sp_tint(x); - -	return (unsigned) ieee754sp_tint(ieee754sp_sub(x, hb)) | -	    ((unsigned) 1 << 31); -}  | 
