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GNU C Library master sources branch master updated. glibc-2.24-177-g87ab10d
- From: jsm28 at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 21 Sep 2016 21:03:53 -0000
- Subject: GNU C Library master sources branch master updated. glibc-2.24-177-g87ab10d
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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=87ab10d6524fe4faabd7eb3eac5868165ecfb323
commit 87ab10d6524fe4faabd7eb3eac5868165ecfb323
Author: James Greenhalgh <james.greenhalgh@arm.com>
Date: Wed Sep 21 21:02:54 2016 +0000
[soft-fp] Add support for various half-precision conversion routines.
This patch adds conversion routines required for _Float16 support in
AArch64.
These are one-step conversions to and from TImode and TFmode. We need
these on AArch64 regardless of presence of the ARMv8.2-A 16-bit
floating-point extensions.
In the patch, soft-fp/half.h is derived from soft-fp/single.h . The
conversion routines are derivatives of their respective SFmode
variants.
* soft-fp/extendhftf2.c: New.
* soft-fp/fixhfti.c: Likewise.
* soft-fp/fixunshfti.c: Likewise.
* soft-fp/floattihf.c: Likewise.
* soft-fp/floatuntihf.c: Likewise.
* soft-fp/half.h: Likewise.
* soft-fp/trunctfhf2.c: Likewise.
diff --git a/ChangeLog b/ChangeLog
index 00162c3..e928977 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2016-09-21 James Greenhalgh <james.greenhalgh@arm.com>
+
+ * soft-fp/extendhftf2.c: New.
+ * soft-fp/fixhfti.c: Likewise.
+ * soft-fp/fixunshfti.c: Likewise.
+ * soft-fp/floattihf.c: Likewise.
+ * soft-fp/floatuntihf.c: Likewise.
+ * soft-fp/half.h: Likewise.
+ * soft-fp/trunctfhf2.c: Likewise.
+
2016-09-21 Joseph Myers <joseph@codesourcery.com>
* math/math.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (issubnormal): New
diff --git a/soft-fp/extendhftf2.c b/soft-fp/extendhftf2.c
new file mode 100644
index 0000000..6ff6438
--- /dev/null
+++ b/soft-fp/extendhftf2.c
@@ -0,0 +1,53 @@
+/* Software floating-point emulation.
+ Return an IEEE half converted to IEEE quad
+ Copyright (C) 1997-2016 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 "quad.h"
+
+TFtype
+__extendhftf2 (HFtype a)
+{
+ FP_DECL_EX;
+ FP_DECL_H (A);
+ FP_DECL_Q (R);
+ TFtype r;
+
+ FP_INIT_EXCEPTIONS;
+ FP_UNPACK_RAW_H (A, a);
+#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+ FP_EXTEND (Q, H, 4, 1, R, A);
+#else
+ FP_EXTEND (Q, H, 2, 1, R, A);
+#endif
+ FP_PACK_RAW_Q (r, R);
+ FP_HANDLE_EXCEPTIONS;
+
+ return r;
+}
diff --git a/soft-fp/fixhfti.c b/soft-fp/fixhfti.c
new file mode 100644
index 0000000..3610f4c
--- /dev/null
+++ b/soft-fp/fixhfti.c
@@ -0,0 +1,45 @@
+/* Software floating-point emulation.
+ Convert IEEE half to 128bit signed integer
+ Copyright (C) 2007-2016 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"
+
+TItype
+__fixhfti (HFtype a)
+{
+ FP_DECL_EX;
+ FP_DECL_H (A);
+ UTItype r;
+
+ FP_INIT_EXCEPTIONS;
+ FP_UNPACK_RAW_H (A, a);
+ FP_TO_INT_H (r, A, TI_BITS, 1);
+ FP_HANDLE_EXCEPTIONS;
+
+ return r;
+}
diff --git a/soft-fp/fixunshfti.c b/soft-fp/fixunshfti.c
new file mode 100644
index 0000000..30edbfe
--- /dev/null
+++ b/soft-fp/fixunshfti.c
@@ -0,0 +1,45 @@
+/* Software floating-point emulation.
+ Convert IEEE half to 128bit unsigned integer
+ Copyright (C) 2007-2016 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"
+
+UTItype
+__fixunshfti (HFtype a)
+{
+ FP_DECL_EX;
+ FP_DECL_H (A);
+ UTItype r;
+
+ FP_INIT_EXCEPTIONS;
+ FP_UNPACK_RAW_H (A, a);
+ FP_TO_INT_H (r, A, TI_BITS, 0);
+ FP_HANDLE_EXCEPTIONS;
+
+ return r;
+}
diff --git a/soft-fp/floattihf.c b/soft-fp/floattihf.c
new file mode 100644
index 0000000..74ac83a
--- /dev/null
+++ b/soft-fp/floattihf.c
@@ -0,0 +1,45 @@
+/* Software floating-point emulation.
+ Convert a 128bit signed integer to IEEE half
+ Copyright (C) 2007-2016 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"
+
+HFtype
+__floattihf (TItype i)
+{
+ FP_DECL_EX;
+ FP_DECL_H (A);
+ HFtype a;
+
+ FP_INIT_ROUNDMODE;
+ FP_FROM_INT_H (A, i, TI_BITS, UTItype);
+ FP_PACK_RAW_H (a, A);
+ FP_HANDLE_EXCEPTIONS;
+
+ return a;
+}
diff --git a/soft-fp/floatuntihf.c b/soft-fp/floatuntihf.c
new file mode 100644
index 0000000..90e77c2
--- /dev/null
+++ b/soft-fp/floatuntihf.c
@@ -0,0 +1,45 @@
+/* Software floating-point emulation.
+ Convert a 128bit unsigned integer to IEEE half.
+ Copyright (C) 2007-2016 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"
+
+HFtype
+__floatuntihf (UTItype i)
+{
+ FP_DECL_EX;
+ FP_DECL_H (A);
+ HFtype a;
+
+ FP_INIT_ROUNDMODE;
+ FP_FROM_INT_H (A, i, TI_BITS, UTItype);
+ FP_PACK_RAW_H (a, A);
+ FP_HANDLE_EXCEPTIONS;
+
+ return a;
+}
diff --git a/soft-fp/half.h b/soft-fp/half.h
new file mode 100644
index 0000000..ba75297
--- /dev/null
+++ b/soft-fp/half.h
@@ -0,0 +1,170 @@
+/* Software floating-point emulation.
+ Definitions for IEEE Half Precision.
+ Copyright (C) 1997-2016 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/>. */
+
+#ifndef SOFT_FP_HALF_H
+#define SOFT_FP_HALF_H 1
+
+#if _FP_W_TYPE_SIZE < 32
+# error "Here's a nickel kid. Go buy yourself a real computer."
+#endif
+
+#define _FP_FRACTBITS_H (_FP_W_TYPE_SIZE)
+
+#define _FP_FRACTBITS_DW_H (_FP_W_TYPE_SIZE)
+
+#define _FP_FRACBITS_H 11
+#define _FP_FRACXBITS_H (_FP_FRACTBITS_H - _FP_FRACBITS_H)
+#define _FP_WFRACBITS_H (_FP_WORKBITS + _FP_FRACBITS_H)
+#define _FP_WFRACXBITS_H (_FP_FRACTBITS_H - _FP_WFRACBITS_H)
+#define _FP_EXPBITS_H 5
+#define _FP_EXPBIAS_H 15
+#define _FP_EXPMAX_H 31
+
+#define _FP_QNANBIT_H ((_FP_W_TYPE) 1 << (_FP_FRACBITS_H-2))
+#define _FP_QNANBIT_SH_H ((_FP_W_TYPE) 1 << (_FP_FRACBITS_H-2+_FP_WORKBITS))
+#define _FP_IMPLBIT_H ((_FP_W_TYPE) 1 << (_FP_FRACBITS_H-1))
+#define _FP_IMPLBIT_SH_H ((_FP_W_TYPE) 1 << (_FP_FRACBITS_H-1+_FP_WORKBITS))
+#define _FP_OVERFLOW_H ((_FP_W_TYPE) 1 << (_FP_WFRACBITS_H))
+
+#define _FP_WFRACBITS_DW_H (2 * _FP_WFRACBITS_H)
+#define _FP_WFRACXBITS_DW_H (_FP_FRACTBITS_DW_H - _FP_WFRACBITS_DW_H)
+#define _FP_HIGHBIT_DW_H \
+ ((_FP_W_TYPE) 1 << (_FP_WFRACBITS_DW_H - 1) % _FP_W_TYPE_SIZE)
+
+/* The implementation of _FP_MUL_MEAT_H and _FP_DIV_MEAT_H should be
+ chosen by the target machine. */
+
+typedef float HFtype __attribute__ ((mode (HF)));
+
+union _FP_UNION_H
+{
+ HFtype flt;
+ struct _FP_STRUCT_LAYOUT
+ {
+#if __BYTE_ORDER == __BIG_ENDIAN
+ unsigned sign : 1;
+ unsigned exp : _FP_EXPBITS_H;
+ unsigned frac : _FP_FRACBITS_H - (_FP_IMPLBIT_H != 0);
+#else
+ unsigned frac : _FP_FRACBITS_H - (_FP_IMPLBIT_H != 0);
+ unsigned exp : _FP_EXPBITS_H;
+ unsigned sign : 1;
+#endif
+ } bits __attribute__ ((packed));
+};
+
+#define FP_DECL_H(X) _FP_DECL (1, X)
+#define FP_UNPACK_RAW_H(X, val) _FP_UNPACK_RAW_1 (H, X, (val))
+#define FP_UNPACK_RAW_HP(X, val) _FP_UNPACK_RAW_1_P (H, X, (val))
+#define FP_PACK_RAW_H(val, X) _FP_PACK_RAW_1 (H, (val), X)
+#define FP_PACK_RAW_HP(val, X) \
+ do \
+ { \
+ if (!FP_INHIBIT_RESULTS) \
+ _FP_PACK_RAW_1_P (H, (val), X); \
+ } \
+ while (0)
+
+#define FP_UNPACK_H(X, val) \
+ do \
+ { \
+ _FP_UNPACK_RAW_1 (H, X, (val)); \
+ _FP_UNPACK_CANONICAL (H, 1, X); \
+ } \
+ while (0)
+
+#define FP_UNPACK_HP(X, val) \
+ do \
+ { \
+ _FP_UNPACK_RAW_1_P (H, X, (val)); \
+ _FP_UNPACK_CANONICAL (H, 1, X); \
+ } \
+ while (0)
+
+#define FP_UNPACK_SEMIRAW_H(X, val) \
+ do \
+ { \
+ _FP_UNPACK_RAW_1 (H, X, (val)); \
+ _FP_UNPACK_SEMIRAW (H, 1, X); \
+ } \
+ while (0)
+
+#define FP_UNPACK_SEMIRAW_HP(X, val) \
+ do \
+ { \
+ _FP_UNPACK_RAW_1_P (H, X, (val)); \
+ _FP_UNPACK_SEMIRAW (H, 1, X); \
+ } \
+ while (0)
+
+#define FP_PACK_H(val, X) \
+ do \
+ { \
+ _FP_PACK_CANONICAL (H, 1, X); \
+ _FP_PACK_RAW_1 (H, (val), X); \
+ } \
+ while (0)
+
+#define FP_PACK_HP(val, X) \
+ do \
+ { \
+ _FP_PACK_CANONICAL (H, 1, X); \
+ if (!FP_INHIBIT_RESULTS) \
+ _FP_PACK_RAW_1_P (H, (val), X); \
+ } \
+ while (0)
+
+#define FP_PACK_SEMIRAW_H(val, X) \
+ do \
+ { \
+ _FP_PACK_SEMIRAW (H, 1, X); \
+ _FP_PACK_RAW_1 (H, (val), X); \
+ } \
+ while (0)
+
+#define FP_PACK_SEMIRAW_HP(val, X) \
+ do \
+ { \
+ _FP_PACK_SEMIRAW (H, 1, X); \
+ if (!FP_INHIBIT_RESULTS) \
+ _FP_PACK_RAW_1_P (H, (val), X); \
+ } \
+ while (0)
+
+#define FP_TO_INT_H(r, X, rsz, rsg) _FP_TO_INT (H, 1, (r), X, (rsz), (rsg))
+#define FP_TO_INT_ROUND_H(r, X, rsz, rsg) \
+ _FP_TO_INT_ROUND (H, 1, (r), X, (rsz), (rsg))
+#define FP_FROM_INT_H(X, r, rs, rt) _FP_FROM_INT (H, 1, X, (r), (rs), rt)
+
+/* HFmode arithmetic is not implemented. */
+
+#define _FP_FRAC_HIGH_H(X) _FP_FRAC_HIGH_1 (X)
+#define _FP_FRAC_HIGH_RAW_H(X) _FP_FRAC_HIGH_1 (X)
+#define _FP_FRAC_HIGH_DW_H(X) _FP_FRAC_HIGH_1 (X)
+
+#endif /* !SOFT_FP_HALF_H */
diff --git a/soft-fp/trunctfhf2.c b/soft-fp/trunctfhf2.c
new file mode 100644
index 0000000..0500b14
--- /dev/null
+++ b/soft-fp/trunctfhf2.c
@@ -0,0 +1,52 @@
+/* Software floating-point emulation.
+ Truncate IEEE quad into IEEE half.
+ Copyright (C) 1997-2015 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 "quad.h"
+
+HFtype
+__trunctfhf2 (TFtype a)
+{
+ FP_DECL_EX;
+ FP_DECL_Q (A);
+ FP_DECL_H (R);
+ HFtype r;
+
+ FP_INIT_ROUNDMODE;
+ FP_UNPACK_SEMIRAW_Q (A, a);
+#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+ FP_TRUNC (H, Q, 1, 4, R, A);
+#else
+ FP_TRUNC (H, Q, 1, 2, R, A);
+#endif
+ FP_PACK_SEMIRAW_H (r, R);
+ FP_HANDLE_EXCEPTIONS;
+
+ return r;
+}
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 10 +++
soft-fp/extendhftf2.c | 53 +++++++++++++++
soft-fp/fixhfti.c | 45 +++++++++++++
soft-fp/fixunshfti.c | 45 +++++++++++++
soft-fp/floattihf.c | 45 +++++++++++++
soft-fp/floatuntihf.c | 45 +++++++++++++
soft-fp/half.h | 170 +++++++++++++++++++++++++++++++++++++++++++++++++
soft-fp/trunctfhf2.c | 52 +++++++++++++++
8 files changed, 465 insertions(+), 0 deletions(-)
create mode 100644 soft-fp/extendhftf2.c
create mode 100644 soft-fp/fixhfti.c
create mode 100644 soft-fp/fixunshfti.c
create mode 100644 soft-fp/floattihf.c
create mode 100644 soft-fp/floatuntihf.c
create mode 100644 soft-fp/half.h
create mode 100644 soft-fp/trunctfhf2.c
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