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Commit cea2be44 authored by Nigel Stephens's avatar Nigel Stephens Committed by Ralf Baechle
Browse files

MIPS: Fix abs.[sd] and neg.[sd] emulation for NaN operands 



This patch ensures that the sign bit is always updated for NaN operands.

Signed-off-by: default avatarChris Dearman <chris@mips.com>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent a074f0e8

arch/mips/math-emu/dp_simple.c

+4 −9
Original line number Diff line number Diff line
@@ -62,8 +62,6 @@ ieee754dp ieee754dp_neg(ieee754dp x) 
		return ieee754dp_nanxcpt(y, "neg");

	}



	if (ieee754dp_isnan(x))	/* but not infinity */

		return ieee754dp_nanxcpt(x, "neg", x);

	return x;

}
@@ -76,15 +74,12 @@ ieee754dp ieee754dp_abs(ieee754dp x) 
	CLEARCX;

	FLUSHXDP;



	/* Clear sign ALWAYS, irrespective of NaN */

	DPSIGN(x) = 0;



	if (xc == IEEE754_CLASS_SNAN) {

		SETCX(IEEE754_INVALID_OPERATION);

		return ieee754dp_nanxcpt(ieee754dp_indef(), "neg");

		return ieee754dp_nanxcpt(ieee754dp_indef(), "abs");

	}



	if (ieee754dp_isnan(x))	/* but not infinity */

		return ieee754dp_nanxcpt(x, "abs", x);



	/* quick fix up */

	DPSIGN(x) = 0;

	return x;

}

arch/mips/math-emu/sp_simple.c

+3 −8
Original line number Diff line number Diff line
@@ -62,8 +62,6 @@ ieee754sp ieee754sp_neg(ieee754sp x) 
		return ieee754sp_nanxcpt(y, "neg");

	}



	if (ieee754sp_isnan(x))	/* but not infinity */

		return ieee754sp_nanxcpt(x, "neg", x);

	return x;

}
@@ -76,15 +74,12 @@ ieee754sp ieee754sp_abs(ieee754sp x) 
	CLEARCX;

	FLUSHXSP;



	/* Clear sign ALWAYS, irrespective of NaN */

	SPSIGN(x) = 0;



	if (xc == IEEE754_CLASS_SNAN) {

		SETCX(IEEE754_INVALID_OPERATION);

		return ieee754sp_nanxcpt(ieee754sp_indef(), "abs");

	}



	if (ieee754sp_isnan(x))	/* but not infinity */

		return ieee754sp_nanxcpt(x, "abs", x);



	/* quick fix up */

	SPSIGN(x) = 0;

	return x;

}