* [PATCH] soft-fp: Add __extendhfsf2/__extendhfdf2, __truncsfhf2/__truncdfhf2, __eqhf2/__nehf2
@ 2021-07-07 3:00 liuhongt
2021-07-07 14:57 ` Joseph Myers
0 siblings, 1 reply; 2+ messages in thread
From: liuhongt @ 2021-07-07 3:00 UTC (permalink / raw)
To: libc-alpha
1. Add __extendhfdf2/__extendhfsf2 to return an IEEE half converted to IEEE double/single.
2. Add __truncdfhf2/__extendsfhf2 to truncate IEEE double/single into IEEE half.
3. Add __eqhf2/__nehf2 to return 0 if a == b and a,b are not NAN, otherwise return 1.
These are needed by x86 _Float16:
https://software.intel.com/content/www/us/en/develop/download/intel-avx512-fp16-architecture-specification.html
support in GCC.
---
soft-fp/eqhf2.c | 49 +++++++++++++++++++++++++++++++++++++++
soft-fp/extendhfdf2.c | 53 +++++++++++++++++++++++++++++++++++++++++++
soft-fp/extendhfsf2.c | 49 +++++++++++++++++++++++++++++++++++++++
soft-fp/half.h | 2 ++
soft-fp/truncdfhf2.c | 52 ++++++++++++++++++++++++++++++++++++++++++
soft-fp/truncsfhf2.c | 48 +++++++++++++++++++++++++++++++++++++++
6 files changed, 253 insertions(+)
create mode 100644 soft-fp/eqhf2.c
create mode 100644 soft-fp/extendhfdf2.c
create mode 100644 soft-fp/extendhfsf2.c
create mode 100644 soft-fp/truncdfhf2.c
create mode 100644 soft-fp/truncsfhf2.c
diff --git a/soft-fp/eqhf2.c b/soft-fp/eqhf2.c
new file mode 100644
index 0000000000..6d6634e5c5
--- /dev/null
+++ b/soft-fp/eqhf2.c
@@ -0,0 +1,49 @@
+/* Software floating-point emulation.
+ Return 0 iff a == b, 1 otherwise
+ 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"
+
+CMPtype
+__eqhf2 (HFtype a, HFtype b)
+{
+ FP_DECL_EX;
+ FP_DECL_H (A);
+ FP_DECL_H (B);
+ CMPtype r;
+
+ FP_INIT_EXCEPTIONS;
+ FP_UNPACK_RAW_H (A, a);
+ FP_UNPACK_RAW_H (B, b);
+ FP_CMP_EQ_H (r, A, B, 1);
+ FP_HANDLE_EXCEPTIONS;
+
+ return r;
+}
+
+strong_alias (__eqhf2, __nehf2);
diff --git a/soft-fp/extendhfdf2.c b/soft-fp/extendhfdf2.c
new file mode 100644
index 0000000000..337ba791d4
--- /dev/null
+++ b/soft-fp/extendhfdf2.c
@@ -0,0 +1,53 @@
+/* Software floating-point emulation.
+ Return an IEEE half converted to IEEE double
+ 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 "double.h"
+
+DFtype
+__extendhfdf2 (HFtype a)
+{
+ FP_DECL_EX;
+ FP_DECL_H (A);
+ FP_DECL_D (R);
+ DFtype r;
+
+ FP_INIT_EXCEPTIONS;
+ FP_UNPACK_RAW_H (A, a);
+#if _FP_W_TYPE_SIZE < _FP_FRACBITS_D
+ FP_EXTEND (D, H, 2, 1, R, A);
+#else
+ FP_EXTEND (D, H, 1, 1, R, A);
+#endif
+ FP_PACK_RAW_D (r, R);
+ FP_HANDLE_EXCEPTIONS;
+
+ return r;
+}
diff --git a/soft-fp/extendhfsf2.c b/soft-fp/extendhfsf2.c
new file mode 100644
index 0000000000..a02f46d9a9
--- /dev/null
+++ b/soft-fp/extendhfsf2.c
@@ -0,0 +1,49 @@
+/* Software floating-point emulation.
+ Return an IEEE half converted to IEEE single
+ 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 "single.h"
+
+SFtype
+__extendhfsf2 (HFtype a)
+{
+ FP_DECL_EX;
+ FP_DECL_H (A);
+ FP_DECL_S (R);
+ SFtype r;
+
+ FP_INIT_EXCEPTIONS;
+ FP_UNPACK_RAW_H (A, a);
+ FP_EXTEND (S, H, 1, 1, R, A);
+ FP_PACK_RAW_S (r, R);
+ FP_HANDLE_EXCEPTIONS;
+
+ return r;
+}
diff --git a/soft-fp/half.h b/soft-fp/half.h
index ca2c1fad03..70af2712fc 100644
--- a/soft-fp/half.h
+++ b/soft-fp/half.h
@@ -167,4 +167,6 @@ union _FP_UNION_H
#define _FP_FRAC_HIGH_RAW_H(X) _FP_FRAC_HIGH_1 (X)
#define _FP_FRAC_HIGH_DW_H(X) _FP_FRAC_HIGH_1 (X)
+#define FP_CMP_EQ_H(r, X, Y, ex) _FP_CMP_EQ (H, 1, (r), X, Y, (ex))
+
#endif /* !SOFT_FP_HALF_H */
diff --git a/soft-fp/truncdfhf2.c b/soft-fp/truncdfhf2.c
new file mode 100644
index 0000000000..8bcb278769
--- /dev/null
+++ b/soft-fp/truncdfhf2.c
@@ -0,0 +1,52 @@
+/* Software floating-point emulation.
+ Truncate IEEE double 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 "double.h"
+
+HFtype
+__truncdfhf2 (DFtype a)
+{
+ FP_DECL_EX;
+ FP_DECL_D (A);
+ FP_DECL_H (R);
+ HFtype r;
+
+ FP_INIT_ROUNDMODE;
+ FP_UNPACK_SEMIRAW_D (A, a);
+#if _FP_W_TYPE_SIZE < _FP_FRACBITS_D
+ FP_TRUNC (H, D, 1, 2, R, A);
+#else
+ FP_TRUNC (H, D, 1, 1, R, A);
+#endif
+ FP_PACK_SEMIRAW_H (r, R);
+ FP_HANDLE_EXCEPTIONS;
+
+ return r;
+}
diff --git a/soft-fp/truncsfhf2.c b/soft-fp/truncsfhf2.c
new file mode 100644
index 0000000000..25bee29f7f
--- /dev/null
+++ b/soft-fp/truncsfhf2.c
@@ -0,0 +1,48 @@
+/* Software floating-point emulation.
+ Truncate IEEE single 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 "single.h"
+
+HFtype
+__truncsfhf2 (SFtype a)
+{
+ FP_DECL_EX;
+ FP_DECL_S (A);
+ FP_DECL_H (R);
+ HFtype r;
+
+ FP_INIT_ROUNDMODE;
+ FP_UNPACK_SEMIRAW_S (A, a);
+ FP_TRUNC (H, S, 1, 1, R, A);
+ FP_PACK_SEMIRAW_H (r, R);
+ FP_HANDLE_EXCEPTIONS;
+
+ return r;
+}
--
2.18.1
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] soft-fp: Add __extendhfsf2/__extendhfdf2, __truncsfhf2/__truncdfhf2, __eqhf2/__nehf2
2021-07-07 3:00 [PATCH] soft-fp: Add __extendhfsf2/__extendhfdf2, __truncsfhf2/__truncdfhf2, __eqhf2/__nehf2 liuhongt
@ 2021-07-07 14:57 ` Joseph Myers
0 siblings, 0 replies; 2+ messages in thread
From: Joseph Myers @ 2021-07-07 14:57 UTC (permalink / raw)
To: liuhongt; +Cc: libc-alpha
On Wed, 7 Jul 2021, liuhongt via Libc-alpha wrote:
> 1. Add __extendhfdf2/__extendhfsf2 to return an IEEE half converted to IEEE double/single.
> 2. Add __truncdfhf2/__extendsfhf2 to truncate IEEE double/single into IEEE half.
> 3. Add __eqhf2/__nehf2 to return 0 if a == b and a,b are not NAN, otherwise return 1.
OK.
--
Joseph S. Myers
joseph@codesourcery.com
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2021-07-07 14:57 ` Joseph Myers
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