add wifi6 8852be driver

hc

2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da

 kernel/arch/mips/math-emu/dp_maddf.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * IEEE754 floating point arithmetic
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  * double precision: MADDF.f (Fused Multiply Add)
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@@ -6,10 +7,6 @@
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  * MIPS floating point support
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  * Copyright (C) 2015 Imagination Technologies, Ltd.
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  * Author: Markos Chandras <markos.chandras@imgtec.com>
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- *
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- *  This program is free software; you can distribute it and/or modify it
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- *  under the terms of the GNU General Public License as published by the
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- *  Free Software Foundation; version 2 of the License.
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  */
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 #include "ieee754dp.h"
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@@ -71,6 +68,12 @@
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68
 
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 	ieee754_clearcx();
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+	rs = xs ^ ys;
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+	if (flags & MADDF_NEGATE_PRODUCT)
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+		rs ^= 1;
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+	if (flags & MADDF_NEGATE_ADDITION)
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+		zs ^= 1;
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+
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 	/*
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 	 * Handle the cases when at least one of x, y or z is a NaN.
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 	 * Order of precedence is sNaN, qNaN and z, x, y.
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@@ -107,9 +110,7 @@
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 	case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_NORM):
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 	case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_DNORM):
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 	case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_INF):
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-		if ((zc == IEEE754_CLASS_INF) &&
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-		    ((!(flags & MADDF_NEGATE_PRODUCT) && (zs != (xs ^ ys))) ||
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-		     ((flags & MADDF_NEGATE_PRODUCT) && (zs == (xs ^ ys))))) {
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+		if ((zc == IEEE754_CLASS_INF) && (zs != rs)) {
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 			/*
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 			 * Cases of addition of infinities with opposite signs
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 			 * or subtraction of infinities with same signs.
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@@ -119,15 +120,10 @@
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 		}
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 		/*
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 		 * z is here either not an infinity, or an infinity having the
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-		 * same sign as product (x*y) (in case of MADDF.D instruction)
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-		 * or product -(x*y) (in MSUBF.D case). The result must be an
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-		 * infinity, and its sign is determined only by the value of
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-		 * (flags & MADDF_NEGATE_PRODUCT) and the signs of x and y.
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+		 * same sign as product (x*y). The result must be an infinity,
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+		 * and its sign is determined only by the sign of product (x*y).
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 		 */
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-		if (flags & MADDF_NEGATE_PRODUCT)
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-			return ieee754dp_inf(1 ^ (xs ^ ys));
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-		else
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-			return ieee754dp_inf(xs ^ ys);
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+		return ieee754dp_inf(rs);
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 	case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_ZERO):
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 	case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_NORM):
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@@ -138,10 +134,7 @@
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 			return ieee754dp_inf(zs);
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 		if (zc == IEEE754_CLASS_ZERO) {
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 			/* Handle cases +0 + (-0) and similar ones. */
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-			if ((!(flags & MADDF_NEGATE_PRODUCT)
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-					&& (zs == (xs ^ ys))) ||
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-			    ((flags & MADDF_NEGATE_PRODUCT)
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-					&& (zs != (xs ^ ys))))
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+			if (zs == rs)
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 				/*
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 				 * Cases of addition of zeros of equal signs
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 				 * or subtraction of zeroes of opposite signs.
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@@ -157,8 +150,7 @@
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 	case CLPAIR(IEEE754_CLASS_DNORM, IEEE754_CLASS_DNORM):
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 		DPDNORMX;
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-		/* fall through */
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-
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+		fallthrough;
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 	case CLPAIR(IEEE754_CLASS_NORM, IEEE754_CLASS_DNORM):
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 		if (zc == IEEE754_CLASS_INF)
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 			return ieee754dp_inf(zs);
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@@ -190,9 +182,6 @@
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 	assert(ym & DP_HIDDEN_BIT);
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 	re = xe + ye;
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-	rs = xs ^ ys;
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-	if (flags & MADDF_NEGATE_PRODUCT)
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-		rs ^= 1;
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 	/* shunt to top of word */
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 	xm <<= 64 - (DP_FBITS + 1);
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@@ -343,3 +332,27 @@
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 {
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 	return _dp_maddf(z, x, y, MADDF_NEGATE_PRODUCT);
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 }
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+
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+union ieee754dp ieee754dp_madd(union ieee754dp z, union ieee754dp x,
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+				union ieee754dp y)
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+{
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+	return _dp_maddf(z, x, y, 0);
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+}
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+
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+union ieee754dp ieee754dp_msub(union ieee754dp z, union ieee754dp x,
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+				union ieee754dp y)
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+{
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+	return _dp_maddf(z, x, y, MADDF_NEGATE_ADDITION);
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+}
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+
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+union ieee754dp ieee754dp_nmadd(union ieee754dp z, union ieee754dp x,
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+				union ieee754dp y)
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+{
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+	return _dp_maddf(z, x, y, MADDF_NEGATE_PRODUCT|MADDF_NEGATE_ADDITION);
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+}
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+
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+union ieee754dp ieee754dp_nmsub(union ieee754dp z, union ieee754dp x,
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+				union ieee754dp y)
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+{
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+	return _dp_maddf(z, x, y, MADDF_NEGATE_PRODUCT);
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+}