From 50a212ec906f7524620675f0c57357691c26c81f Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 16 Oct 2024 01:20:19 +0000
Subject: [PATCH] 修改GPIO导出默认初始值
---
kernel/arch/mips/math-emu/sp_maddf.c | 61 ++++++++++++++++++------------
1 files changed, 37 insertions(+), 24 deletions(-)
diff --git a/kernel/arch/mips/math-emu/sp_maddf.c b/kernel/arch/mips/math-emu/sp_maddf.c
index 07ba675..473ee22 100644
--- a/kernel/arch/mips/math-emu/sp_maddf.c
+++ b/kernel/arch/mips/math-emu/sp_maddf.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* IEEE754 floating point arithmetic
* single precision: MADDF.f (Fused Multiply Add)
@@ -6,10 +7,6 @@
* MIPS floating point support
* Copyright (C) 2015 Imagination Technologies, Ltd.
* Author: Markos Chandras <markos.chandras@imgtec.com>
- *
- * This program is free software; you can distribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; version 2 of the License.
*/
#include "ieee754sp.h"
@@ -38,6 +35,12 @@
FLUSHZSP;
ieee754_clearcx();
+
+ rs = xs ^ ys;
+ if (flags & MADDF_NEGATE_PRODUCT)
+ rs ^= 1;
+ if (flags & MADDF_NEGATE_ADDITION)
+ zs ^= 1;
/*
* Handle the cases when at least one of x, y or z is a NaN.
@@ -76,9 +79,7 @@
case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_NORM):
case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_DNORM):
case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_INF):
- if ((zc == IEEE754_CLASS_INF) &&
- ((!(flags & MADDF_NEGATE_PRODUCT) && (zs != (xs ^ ys))) ||
- ((flags & MADDF_NEGATE_PRODUCT) && (zs == (xs ^ ys))))) {
+ if ((zc == IEEE754_CLASS_INF) && (zs != rs)) {
/*
* Cases of addition of infinities with opposite signs
* or subtraction of infinities with same signs.
@@ -88,15 +89,10 @@
}
/*
* z is here either not an infinity, or an infinity having the
- * same sign as product (x*y) (in case of MADDF.D instruction)
- * or product -(x*y) (in MSUBF.D case). The result must be an
- * infinity, and its sign is determined only by the value of
- * (flags & MADDF_NEGATE_PRODUCT) and the signs of x and y.
+ * same sign as product (x*y). The result must be an infinity,
+ * and its sign is determined only by the sign of product (x*y).
*/
- if (flags & MADDF_NEGATE_PRODUCT)
- return ieee754sp_inf(1 ^ (xs ^ ys));
- else
- return ieee754sp_inf(xs ^ ys);
+ return ieee754sp_inf(rs);
case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_ZERO):
case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_NORM):
@@ -107,10 +103,7 @@
return ieee754sp_inf(zs);
if (zc == IEEE754_CLASS_ZERO) {
/* Handle cases +0 + (-0) and similar ones. */
- if ((!(flags & MADDF_NEGATE_PRODUCT)
- && (zs == (xs ^ ys))) ||
- ((flags & MADDF_NEGATE_PRODUCT)
- && (zs != (xs ^ ys))))
+ if (zs == rs)
/*
* Cases of addition of zeros of equal signs
* or subtraction of zeroes of opposite signs.
@@ -126,8 +119,7 @@
case CLPAIR(IEEE754_CLASS_DNORM, IEEE754_CLASS_DNORM):
SPDNORMX;
- /* fall through */
-
+ fallthrough;
case CLPAIR(IEEE754_CLASS_NORM, IEEE754_CLASS_DNORM):
if (zc == IEEE754_CLASS_INF)
return ieee754sp_inf(zs);
@@ -161,9 +153,6 @@
assert(ym & SP_HIDDEN_BIT);
re = xe + ye;
- rs = xs ^ ys;
- if (flags & MADDF_NEGATE_PRODUCT)
- rs ^= 1;
/* Multiple 24 bit xm and ym to give 48 bit results */
rm64 = (uint64_t)xm * ym;
@@ -263,3 +252,27 @@
{
return _sp_maddf(z, x, y, MADDF_NEGATE_PRODUCT);
}
+
+union ieee754sp ieee754sp_madd(union ieee754sp z, union ieee754sp x,
+ union ieee754sp y)
+{
+ return _sp_maddf(z, x, y, 0);
+}
+
+union ieee754sp ieee754sp_msub(union ieee754sp z, union ieee754sp x,
+ union ieee754sp y)
+{
+ return _sp_maddf(z, x, y, MADDF_NEGATE_ADDITION);
+}
+
+union ieee754sp ieee754sp_nmadd(union ieee754sp z, union ieee754sp x,
+ union ieee754sp y)
+{
+ return _sp_maddf(z, x, y, MADDF_NEGATE_PRODUCT|MADDF_NEGATE_ADDITION);
+}
+
+union ieee754sp ieee754sp_nmsub(union ieee754sp z, union ieee754sp x,
+ union ieee754sp y)
+{
+ return _sp_maddf(z, x, y, MADDF_NEGATE_PRODUCT);
+}
--
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