| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Fri, 21 Jul 2017 16:09:14 +0200
From: Aleksandar Markovic <aleksandar.markovic@...rk.com>
To: linux-mips@...ux-mips.org
Cc: Aleksandar Markovic <aleksandar.markovic@...tec.com>,
Miodrag Dinic <miodrag.dinic@...tec.com>,
Goran Ferenc <goran.ferenc@...tec.com>,
Douglas Leung <douglas.leung@...tec.com>,
James Hogan <james.hogan@...tec.com>,
linux-kernel@...r.kernel.org, Paul Burton <paul.burton@...tec.com>,
Petar Jovanovic <petar.jovanovic@...tec.com>,
Raghu Gandham <raghu.gandham@...tec.com>,
Ralf Baechle <ralf@...ux-mips.org>
Subject: [PATCH v3 16/16] MIPS: math-emu: <MADDF|MSUBF>.<D|S>: Clean up maddf_flags enumeration
From: Aleksandar Markovic <aleksandar.markovic@...tec.com>
Fix definition and usage of maddf_flags enumeration. Avoid duplicate
definition and apply more common capitalization.
This patch does not change any scenario. It just make MADDF and MSUBF
emulation code more readable and easier to maintain, and hopefully
also prevents future bugs.
Signed-off-by: Miodrag Dinic <miodrag.dinic@...tec.com>
Signed-off-by: Goran Ferenc <goran.ferenc@...tec.com>
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@...tec.com>
---
arch/mips/math-emu/dp_maddf.c | 19 ++++++++-----------
arch/mips/math-emu/ieee754int.h | 4 ++++
arch/mips/math-emu/sp_maddf.c | 19 ++++++++-----------
3 files changed, 20 insertions(+), 22 deletions(-)
diff --git a/arch/mips/math-emu/dp_maddf.c b/arch/mips/math-emu/dp_maddf.c
index 68b55c8..d36f01a 100644
--- a/arch/mips/math-emu/dp_maddf.c
+++ b/arch/mips/math-emu/dp_maddf.c
@@ -14,9 +14,6 @@
#include "ieee754dp.h"
-enum maddf_flags {
- maddf_negate_product = 1 << 0,
-};
/* 128 bits shift right logical with rounding. */
void srl128(u64 *hptr, u64 *lptr, int count)
@@ -111,8 +108,8 @@ static union ieee754dp _dp_maddf(union ieee754dp z, union ieee754dp x,
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))))) {
+ ((!(flags & MADDF_NEGATE_PRODUCT) && (zs != (xs ^ ys))) ||
+ ((flags & MADDF_NEGATE_PRODUCT) && (zs == (xs ^ ys))))) {
/*
* Cases of addition of infinities with opposite signs
* or subtraction of infinities with same signs.
@@ -124,9 +121,9 @@ static union ieee754dp _dp_maddf(union ieee754dp z, union ieee754dp x,
* z is here either not infinity, or infinity of the same sign
* as maddf_negate_product * x * y. So, the result must be
* infinity, and its sign is determined only by the value of
- * (flags & maddf_negate_product) and the signs of x and y.
+ * (flags & MADDF_NEGATE_PRODUCT) and the signs of x and y.
*/
- if (flags & maddf_negate_product)
+ if (flags & MADDF_NEGATE_PRODUCT)
return ieee754dp_inf(1 ^ (xs ^ ys));
else
return ieee754dp_inf(xs ^ ys);
@@ -140,8 +137,8 @@ static union ieee754dp _dp_maddf(union ieee754dp z, union ieee754dp x,
return ieee754dp_inf(zs);
/* Handle cases +0 + (-0) and similar ones. */
if (zc == IEEE754_CLASS_ZERO) {
- if ((!(flags & maddf_negate_product) && (zs == (xs ^ ys))) ||
- ((flags & maddf_negate_product) && (zs != (xs ^ ys))))
+ if ((!(flags & MADDF_NEGATE_PRODUCT) && (zs == (xs ^ ys))) ||
+ ((flags & MADDF_NEGATE_PRODUCT) && (zs != (xs ^ ys))))
return z;
else
return ieee754dp_zero(ieee754_csr.rm == FPU_CSR_RD);
@@ -184,7 +181,7 @@ static union ieee754dp _dp_maddf(union ieee754dp z, union ieee754dp x,
re = xe + ye;
rs = xs ^ ys;
- if (flags & maddf_negate_product)
+ if (flags & MADDF_NEGATE_PRODUCT)
rs ^= 1;
/* shunt to top of word */
@@ -335,5 +332,5 @@ union ieee754dp ieee754dp_maddf(union ieee754dp z, union ieee754dp x,
union ieee754dp ieee754dp_msubf(union ieee754dp z, union ieee754dp x,
union ieee754dp y)
{
- return _dp_maddf(z, x, y, maddf_negate_product);
+ return _dp_maddf(z, x, y, MADDF_NEGATE_PRODUCT);
}
diff --git a/arch/mips/math-emu/ieee754int.h b/arch/mips/math-emu/ieee754int.h
index 8bc2f69..dd2071f 100644
--- a/arch/mips/math-emu/ieee754int.h
+++ b/arch/mips/math-emu/ieee754int.h
@@ -26,6 +26,10 @@
#define CLPAIR(x, y) ((x)*6+(y))
+enum maddf_flags {
+ MADDF_NEGATE_PRODUCT = 1 << 0,
+};
+
static inline void ieee754_clearcx(void)
{
ieee754_csr.cx = 0;
diff --git a/arch/mips/math-emu/sp_maddf.c b/arch/mips/math-emu/sp_maddf.c
index b380189..715cc47 100644
--- a/arch/mips/math-emu/sp_maddf.c
+++ b/arch/mips/math-emu/sp_maddf.c
@@ -14,9 +14,6 @@
#include "ieee754sp.h"
-enum maddf_flags {
- maddf_negate_product = 1 << 0,
-};
static union ieee754sp _sp_maddf(union ieee754sp z, union ieee754sp x,
union ieee754sp y, enum maddf_flags flags)
@@ -81,8 +78,8 @@ static union ieee754sp _sp_maddf(union ieee754sp z, union ieee754sp x,
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))))) {
+ ((!(flags & MADDF_NEGATE_PRODUCT) && (zs != (xs ^ ys))) ||
+ ((flags & MADDF_NEGATE_PRODUCT) && (zs == (xs ^ ys))))) {
/*
* Cases of addition of infinities with opposite signs
* or subtraction of infinities with same signs.
@@ -94,9 +91,9 @@ static union ieee754sp _sp_maddf(union ieee754sp z, union ieee754sp x,
* z is here either not infinity, or infinity of the same sign
* as maddf_negate_product * x * y. So, the result must be
* infinity, and its sign is determined only by the value of
- * (flags & maddf_negate_product) and the signs of x and y.
+ * (flags & MADDF_NEGATE_PRODUCT) and the signs of x and y.
*/
- if (flags & maddf_negate_product)
+ if (flags & MADDF_NEGATE_PRODUCT)
return ieee754sp_inf(1 ^ (xs ^ ys));
else
return ieee754sp_inf(xs ^ ys);
@@ -110,8 +107,8 @@ static union ieee754sp _sp_maddf(union ieee754sp z, union ieee754sp x,
return ieee754sp_inf(zs);
/* Handle cases +0 + (-0) and similar ones. */
if (zc == IEEE754_CLASS_ZERO) {
- if ((!(flags & maddf_negate_product) && (zs == (xs ^ ys))) ||
- ((flags & maddf_negate_product) && (zs != (xs ^ ys))))
+ if ((!(flags & MADDF_NEGATE_PRODUCT) && (zs == (xs ^ ys))) ||
+ ((flags & MADDF_NEGATE_PRODUCT) && (zs != (xs ^ ys))))
return z;
else
return ieee754sp_zero(ieee754_csr.rm == FPU_CSR_RD);
@@ -156,7 +153,7 @@ static union ieee754sp _sp_maddf(union ieee754sp z, union ieee754sp x,
re = xe + ye;
rs = xs ^ ys;
- if (flags & maddf_negate_product)
+ if (flags & MADDF_NEGATE_PRODUCT)
rs ^= 1;
/* Multiple 24 bit xm and ym to give 48 bit results */
@@ -255,5 +252,5 @@ union ieee754sp ieee754sp_maddf(union ieee754sp z, union ieee754sp x,
union ieee754sp ieee754sp_msubf(union ieee754sp z, union ieee754sp x,
union ieee754sp y)
{
- return _sp_maddf(z, x, y, maddf_negate_product);
+ return _sp_maddf(z, x, y, MADDF_NEGATE_PRODUCT);
}
--
2.7.4
Powered by blists - more mailing lists