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glibc/SOURCES/glibc-rh1780204-28.patch

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From 2ab6ce8252a14e6ef0cfb33046dd565ae15085c2 Mon Sep 17 00:00:00 2001
From: Stefan Liebler <stli@linux.ibm.com>
Date: Wed, 11 Dec 2019 15:09:32 +0100
Subject: [PATCH 28/28] S390: Use libc_fe* macros in fe* functions.
This patch updates the s390 specific functions fegetround,
fesetround, feholdexcept, fesetenv, feupdateenv, fegetexceptflag,
fetestexcept, fesetexceptflag, fetestexceptflag.
Now those functions are using the libc_fe* macros if possible.
Furthermore fegetexceptflag is now returning the exception from
dxc field shifted to the usual exception-flags.
Thus a special fetestexceptflag implementation is not needed anymore.
(cherry picked from commit 238adf59db85646ebae47876819bd896dae597bc)
---
sysdeps/s390/fpu/fegetround.c | 9 ++-------
sysdeps/s390/fpu/feholdexcpt.c | 12 ++---------
sysdeps/s390/fpu/fesetenv.c | 21 +++----------------
sysdeps/s390/fpu/fesetround.c | 9 +++------
sysdeps/s390/fpu/fetestexceptflag.c | 31 -----------------------------
sysdeps/s390/fpu/feupdateenv.c | 14 +++----------
sysdeps/s390/fpu/fgetexcptflg.c | 16 ++-------------
sysdeps/s390/fpu/fsetexcptflg.c | 23 ++++++++++-----------
sysdeps/s390/fpu/ftestexcept.c | 16 ++-------------
9 files changed, 27 insertions(+), 124 deletions(-)
delete mode 100644 sysdeps/s390/fpu/fetestexceptflag.c
diff --git a/sysdeps/s390/fpu/fegetround.c b/sysdeps/s390/fpu/fegetround.c
index 3c38bc9189..f1be1d12e1 100644
--- a/sysdeps/s390/fpu/fegetround.c
+++ b/sysdeps/s390/fpu/fegetround.c
@@ -17,17 +17,12 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
-#include <fenv_libc.h>
-#include <fpu_control.h>
+#include <get-rounding-mode.h>
int
__fegetround (void)
{
- fexcept_t cw;
-
- _FPU_GETCW (cw);
-
- return cw & FPC_RM_MASK;
+ return get_rounding_mode ();
}
libm_hidden_def (__fegetround)
weak_alias (__fegetround, fegetround)
diff --git a/sysdeps/s390/fpu/feholdexcpt.c b/sysdeps/s390/fpu/feholdexcpt.c
index 5daee5675d..48af7ff51b 100644
--- a/sysdeps/s390/fpu/feholdexcpt.c
+++ b/sysdeps/s390/fpu/feholdexcpt.c
@@ -17,19 +17,11 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
-#include <fenv_libc.h>
-#include <fpu_control.h>
+#include <fenv_private.h>
int __feholdexcept (fenv_t *envp)
{
- fexcept_t fpc;
- /* Store the environment. */
- __fegetenv (envp);
- /* Clear the current sticky bits as more than one exception
- may be generated. */
- fpc = envp->__fpc & ~(FPC_FLAGS_MASK | FPC_DXC_MASK);
- /* Hold from generating fpu exceptions temporarily. */
- _FPU_SETCW ((fpc & ~(FE_ALL_EXCEPT << FPC_EXCEPTION_MASK_SHIFT)));
+ libc_feholdexcept_s390 (envp);
return 0;
}
libm_hidden_def (__feholdexcept)
diff --git a/sysdeps/s390/fpu/fesetenv.c b/sysdeps/s390/fpu/fesetenv.c
index c6c275d79d..54ba2aa94a 100644
--- a/sysdeps/s390/fpu/fesetenv.c
+++ b/sysdeps/s390/fpu/fesetenv.c
@@ -17,28 +17,13 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
-#include <fenv_libc.h>
-#include <fpu_control.h>
-#include <stddef.h>
-#include <unistd.h>
+#include <fenv_private.h>
int
__fesetenv (const fenv_t *envp)
{
- fenv_t env;
-
- if (envp == FE_DFL_ENV)
- {
- env.__fpc = _FPU_DEFAULT;
- }
- else if (envp == FE_NOMASK_ENV)
- {
- env.__fpc = FPC_EXCEPTION_MASK;
- }
- else
- env = (*envp);
-
- _FPU_SETCW (env.__fpc);
+ fenv_t env = libc_handle_user_fenv_s390 (envp);
+ libc_fesetenv_s390 (&env);
/* Success. */
return 0;
diff --git a/sysdeps/s390/fpu/fesetround.c b/sysdeps/s390/fpu/fesetround.c
index d8a84d2c96..0a7fe2635b 100644
--- a/sysdeps/s390/fpu/fesetround.c
+++ b/sysdeps/s390/fpu/fesetround.c
@@ -17,21 +17,18 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
-#include <fenv_libc.h>
-#include <fpu_control.h>
+#include <fenv_private.h>
int
__fesetround (int round)
{
- if ((round|FPC_RM_MASK) != FPC_RM_MASK)
+ if ((round | FPC_RM_MASK) != FPC_RM_MASK)
{
/* ROUND is not a valid rounding mode. */
return 1;
}
- __asm__ __volatile__ ("srnm 0(%0)"
- :
- : "a" (round));
+ libc_fesetround_s390 (round);
return 0;
}
libm_hidden_def (__fesetround)
diff --git a/sysdeps/s390/fpu/fetestexceptflag.c b/sysdeps/s390/fpu/fetestexceptflag.c
deleted file mode 100644
index 784d356f7b..0000000000
--- a/sysdeps/s390/fpu/fetestexceptflag.c
+++ /dev/null
@@ -1,31 +0,0 @@
-/* Test exception in saved exception state. S/390 version.
- Copyright (C) 2016-2018 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
-
-#include <fenv.h>
-#include <fenv_libc.h>
-
-int
-fetestexceptflag (const fexcept_t *flagp, int excepts)
-{
- /* As *flagp is obtained by an earlier call of fegetexceptflag the
- bits 0-5 of dxc-byte are either zero or correspond to the
- flag-bits. Evaluate flags and last dxc-exception-code. */
- return (((*flagp >> FPC_FLAGS_SHIFT) | (*flagp >> FPC_DXC_SHIFT))
- & excepts
- & FE_ALL_EXCEPT);
-}
diff --git a/sysdeps/s390/fpu/feupdateenv.c b/sysdeps/s390/fpu/feupdateenv.c
index 4888e1a864..f6b3d7d2de 100644
--- a/sysdeps/s390/fpu/feupdateenv.c
+++ b/sysdeps/s390/fpu/feupdateenv.c
@@ -18,21 +18,13 @@
<http://www.gnu.org/licenses/>. */
-#include <fenv_libc.h>
-#include <fpu_control.h>
+#include <fenv_private.h>
int
__feupdateenv (const fenv_t *envp)
{
- fexcept_t temp;
-
- _FPU_GETCW (temp);
- temp = (temp & FPC_FLAGS_MASK) >> FPC_FLAGS_SHIFT;
-
- /* Raise the exceptions since the last call to feholdenv */
- /* re install saved environment. */
- __fesetenv (envp);
- __feraiseexcept ((int) temp);
+ fenv_t env = libc_handle_user_fenv_s390 (envp);
+ libc_feupdateenv_s390 (&env);
/* Success. */
return 0;
diff --git a/sysdeps/s390/fpu/fgetexcptflg.c b/sysdeps/s390/fpu/fgetexcptflg.c
index 2a0f6dc77c..1985b396c9 100644
--- a/sysdeps/s390/fpu/fgetexcptflg.c
+++ b/sysdeps/s390/fpu/fgetexcptflg.c
@@ -17,24 +17,12 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
-#include <fenv_libc.h>
-#include <fpu_control.h>
+#include <fenv_private.h>
int
fegetexceptflag (fexcept_t *flagp, int excepts)
{
- fexcept_t temp, newexcepts;
-
- /* Get the current exceptions. */
- _FPU_GETCW (temp);
- newexcepts = excepts << FPC_FLAGS_SHIFT;
- if ((temp & FPC_NOT_FPU_EXCEPTION) == 0)
- /* Bits 6, 7 of dxc-byte are zero,
- thus bits 0-5 of dxc-byte correspond to the flag-bits.
- Evaluate flags and last dxc-exception-code. */
- newexcepts |= excepts << FPC_DXC_SHIFT;
-
- *flagp = temp & newexcepts;
+ *flagp = libc_fetestexcept_s390 (excepts);
/* Success. */
return 0;
diff --git a/sysdeps/s390/fpu/fsetexcptflg.c b/sysdeps/s390/fpu/fsetexcptflg.c
index e50684c574..51d258cf17 100644
--- a/sysdeps/s390/fpu/fsetexcptflg.c
+++ b/sysdeps/s390/fpu/fsetexcptflg.c
@@ -24,29 +24,26 @@
int
fesetexceptflag (const fexcept_t *flagp, int excepts)
{
- fexcept_t temp, newexcepts;
+ fexcept_t fpc, fpc_new;
/* Get the current environment. We have to do this since we cannot
separately set the status word. */
- _FPU_GETCW (temp);
- /* Install the new exception bits in the Accrued Exception Byte. */
- excepts = excepts & FE_ALL_EXCEPT;
- newexcepts = excepts << FPC_FLAGS_SHIFT;
- temp &= ~newexcepts;
- if ((temp & FPC_NOT_FPU_EXCEPTION) == 0)
+ _FPU_GETCW (fpc);
+
+ /* Clear the current exception bits. */
+ fpc_new = fpc & ~((excepts & FE_ALL_EXCEPT) << FPC_FLAGS_SHIFT);
+ if ((fpc & FPC_NOT_FPU_EXCEPTION) == 0)
/* Bits 6, 7 of dxc-byte are zero,
thus bits 0-5 of dxc-byte correspond to the flag-bits.
Clear given exceptions in dxc-field. */
- temp &= ~(excepts << FPC_DXC_SHIFT);
+ fpc_new &= ~((excepts & FE_ALL_EXCEPT) << FPC_DXC_SHIFT);
- /* Integrate dxc-byte of flagp into flags. The dxc-byte of flagp contains
- either an ieee-exception or 0 (see fegetexceptflag). */
- temp |= (*flagp | ((*flagp >> FPC_DXC_SHIFT) << FPC_FLAGS_SHIFT))
- & newexcepts;
+ /* Set exceptions from flagp in flags-field. */
+ fpc_new |= (*flagp & excepts & FE_ALL_EXCEPT) << FPC_FLAGS_SHIFT;
/* Store the new status word (along with the rest of the environment.
Possibly new exceptions are set but they won't get executed. */
- _FPU_SETCW (temp);
+ _FPU_SETCW (fpc_new);
/* Success. */
return 0;
diff --git a/sysdeps/s390/fpu/ftestexcept.c b/sysdeps/s390/fpu/ftestexcept.c
index 727b9b342d..f2acecc1af 100644
--- a/sysdeps/s390/fpu/ftestexcept.c
+++ b/sysdeps/s390/fpu/ftestexcept.c
@@ -17,23 +17,11 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
-#include <fenv_libc.h>
-#include <fpu_control.h>
+#include <fenv_private.h>
int
fetestexcept (int excepts)
{
- fexcept_t temp, res;
-
- /* Get current exceptions. */
- _FPU_GETCW (temp);
- res = temp >> FPC_FLAGS_SHIFT;
- if ((temp & FPC_NOT_FPU_EXCEPTION) == 0)
- /* Bits 6, 7 of dxc-byte are zero,
- thus bits 0-5 of dxc-byte correspond to the flag-bits.
- Evaluate flags and last dxc-exception-code. */
- res |= temp >> FPC_DXC_SHIFT;
-
- return res & excepts & FE_ALL_EXCEPT;
+ return libc_fetestexcept_s390 (excepts);
}
libm_hidden_def (fetestexcept)
--
2.18.2
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