[glibc/users/skpgkp2/2.33/master] AArch64: Add support for roundeven[f]

[glibc/users/skpgkp2/2.33/master] AArch64: Add support for roundeven[f]

[Sunil Pandey]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=6ff2a80fb6838f7a41a520d50839e448234b619f

commit 6ff2a80fb6838f7a41a520d50839e448234b619f
Author: Wilco Dijkstra <wdijkstr@arm.com>
Date:   Tue Jun 8 13:33:09 2021 +0100

    AArch64: Add support for roundeven[f]
    
    Add inline assembler for the roundeven functions.
    Passes GLIBC regression.  Note GCC does not inline the builtin (PR100966),
    so this cannot be used for now.
    
    (cherry picked from commit 6a86bc099219a656be479d5f31ff90ec7860b112)

Diff:
---
 sysdeps/aarch64/fpu/s_roundeven.c  | 29 +++++++++++++++++++++++++++++
 sysdeps/aarch64/fpu/s_roundevenf.c | 28 ++++++++++++++++++++++++++++
 2 files changed, 57 insertions(+)

diff --git a/sysdeps/aarch64/fpu/s_roundeven.c b/sysdeps/aarch64/fpu/s_roundeven.c
new file mode 100644
index 0000000000..d74b40daf5
--- /dev/null
+++ b/sysdeps/aarch64/fpu/s_roundeven.c
@@ -0,0 +1,29 @@
+/* Copyright (C) 2021 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <math.h>
+#include <libm-alias-double.h>
+
+double
+__roundeven (double x)
+{
+  asm volatile ("frintn \t%d0, %d1" : "=w" (x) : "w" (x));
+  return x;
+}
+hidden_def (__roundeven)
+libm_alias_double (__roundeven, roundeven)
diff --git a/sysdeps/aarch64/fpu/s_roundevenf.c b/sysdeps/aarch64/fpu/s_roundevenf.c
new file mode 100644
index 0000000000..dfc492c2f8
--- /dev/null
+++ b/sysdeps/aarch64/fpu/s_roundevenf.c
@@ -0,0 +1,28 @@
+/* Copyright (C) 2021 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <math.h>
+#include <libm-alias-float.h>
+
+float
+__roundevenf (float x)
+{
+  asm volatile ("frintn \t%s0, %s1" : "=w" (x) : "w" (x));
+  return x;
+}
+libm_alias_float (__roundeven, roundeven)

[glibc/users/skpgkp2/2.33/master] AArch64: Add support for roundeven[f]

[Sunil Pandey]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=5da65a9be3f795cf25aa102e64551a62e5ac4086

commit 5da65a9be3f795cf25aa102e64551a62e5ac4086
Author: Wilco Dijkstra <wdijkstr@arm.com>
Date:   Tue Jun 8 13:33:09 2021 +0100

    AArch64: Add support for roundeven[f]
    
    Add inline assembler for the roundeven functions.
    Passes GLIBC regression.  Note GCC does not inline the builtin (PR100966),
    so this cannot be used for now.
    
    (cherry picked from commit 6a86bc099219a656be479d5f31ff90ec7860b112)

Diff:
---
 sysdeps/aarch64/fpu/s_roundeven.c  | 29 +++++++++++++++++++++++++++++
 sysdeps/aarch64/fpu/s_roundevenf.c | 28 ++++++++++++++++++++++++++++
 2 files changed, 57 insertions(+)

diff --git a/sysdeps/aarch64/fpu/s_roundeven.c b/sysdeps/aarch64/fpu/s_roundeven.c
new file mode 100644
index 0000000000..d74b40daf5
--- /dev/null
+++ b/sysdeps/aarch64/fpu/s_roundeven.c
@@ -0,0 +1,29 @@
+/* Copyright (C) 2021 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <math.h>
+#include <libm-alias-double.h>
+
+double
+__roundeven (double x)
+{
+  asm volatile ("frintn \t%d0, %d1" : "=w" (x) : "w" (x));
+  return x;
+}
+hidden_def (__roundeven)
+libm_alias_double (__roundeven, roundeven)
diff --git a/sysdeps/aarch64/fpu/s_roundevenf.c b/sysdeps/aarch64/fpu/s_roundevenf.c
new file mode 100644
index 0000000000..dfc492c2f8
--- /dev/null
+++ b/sysdeps/aarch64/fpu/s_roundevenf.c
@@ -0,0 +1,28 @@
+/* Copyright (C) 2021 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <math.h>
+#include <libm-alias-float.h>
+
+float
+__roundevenf (float x)
+{
+  asm volatile ("frintn \t%s0, %s1" : "=w" (x) : "w" (x));
+  return x;
+}
+libm_alias_float (__roundeven, roundeven)