From: "H.J. Lu" <hjl.tools@gmail.com>
To: gcc-patches@gcc.gnu.org
Cc: Joseph Myers <joseph@codesourcery.com>
Subject: [PATCH] soft-fp: Update soft-fp from glibc
Date: Thu, 1 Jul 2021 12:28:54 -0700 [thread overview]
Message-ID: <20210701192854.4165968-1-hjl.tools@gmail.com> (raw)
This patch is updating soft-fp from glibc:
1. Add __extendhfxf2 to return an IEEE half converted to IEEE extended.
2. Add __truncxfhf2 to truncate IEEE extended into IEEE half.
These are needed by x86 _Float16 support.
---
libgcc/soft-fp/extendhfxf2.c | 53 ++++++++++++++++++++++++++++++++++++
libgcc/soft-fp/truncxfhf2.c | 52 +++++++++++++++++++++++++++++++++++
2 files changed, 105 insertions(+)
create mode 100644 libgcc/soft-fp/extendhfxf2.c
create mode 100644 libgcc/soft-fp/truncxfhf2.c
diff --git a/libgcc/soft-fp/extendhfxf2.c b/libgcc/soft-fp/extendhfxf2.c
new file mode 100644
index 00000000000..1cb5fef9477
--- /dev/null
+++ b/libgcc/soft-fp/extendhfxf2.c
@@ -0,0 +1,53 @@
+/* Software floating-point emulation.
+ Return an IEEE half converted to IEEE extended.
+ 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.
+
+ In addition to the permissions in the GNU Lesser General Public
+ License, the Free Software Foundation gives you unlimited
+ permission to link the compiled version of this file into
+ combinations with other programs, and to distribute those
+ combinations without any restriction coming from the use of this
+ file. (The Lesser General Public License restrictions do apply in
+ other respects; for example, they cover modification of the file,
+ and distribution when not linked into a combine executable.)
+
+ 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/>. */
+
+#define FP_NO_EXACT_UNDERFLOW
+#include "soft-fp.h"
+#include "half.h"
+#include "extended.h"
+
+XFtype
+__extendhfxf2 (HFtype a)
+{
+ FP_DECL_EX;
+ FP_DECL_H (A);
+ FP_DECL_E (R);
+ XFtype r;
+
+ FP_INIT_EXCEPTIONS;
+ FP_UNPACK_RAW_H (A, a);
+#if _FP_W_TYPE_SIZE < 64
+ FP_EXTEND (E, H, 4, 1, R, A);
+#else
+ FP_EXTEND (E, H, 2, 1, R, A);
+#endif
+ FP_PACK_RAW_E (r, R);
+ FP_HANDLE_EXCEPTIONS;
+
+ return r;
+}
diff --git a/libgcc/soft-fp/truncxfhf2.c b/libgcc/soft-fp/truncxfhf2.c
new file mode 100644
index 00000000000..688ad24523d
--- /dev/null
+++ b/libgcc/soft-fp/truncxfhf2.c
@@ -0,0 +1,52 @@
+/* Software floating-point emulation.
+ Truncate IEEE extended into IEEE half.
+ 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.
+
+ In addition to the permissions in the GNU Lesser General Public
+ License, the Free Software Foundation gives you unlimited
+ permission to link the compiled version of this file into
+ combinations with other programs, and to distribute those
+ combinations without any restriction coming from the use of this
+ file. (The Lesser General Public License restrictions do apply in
+ other respects; for example, they cover modification of the file,
+ and distribution when not linked into a combine executable.)
+
+ 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 "soft-fp.h"
+#include "half.h"
+#include "extended.h"
+
+HFtype
+__truncxfhf2 (XFtype a)
+{
+ FP_DECL_EX;
+ FP_DECL_E (A);
+ FP_DECL_H (R);
+ HFtype r;
+
+ FP_INIT_ROUNDMODE;
+ FP_UNPACK_SEMIRAW_E (A, a);
+#if _FP_W_TYPE_SIZE < 64
+ FP_TRUNC (H, E, 1, 4, R, A);
+#else
+ FP_TRUNC (H, E, 1, 2, R, A);
+#endif
+ FP_PACK_SEMIRAW_H (r, R);
+ FP_HANDLE_EXCEPTIONS;
+
+ return r;
+}
--
2.31.1
next reply other threads:[~2021-07-01 19:28 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-01 19:28 H.J. Lu [this message]
2021-07-01 20:12 ` Jeff Law
2021-07-01 20:35 ` H.J. Lu
-- strict thread matches above, loose matches on Subject: below --
2022-08-10 14:22 Kito Cheng
2022-08-16 7:51 ` Kito Cheng
2022-08-16 14:18 ` Joseph Myers
2022-08-16 14:41 ` Kito Cheng
2021-07-07 15:13 H.J. Lu
2019-05-15 15:55 H.J. Lu
2019-05-16 23:36 ` Joseph Myers
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