| /* Software floating-point emulation. |
| Definitions for IEEE Half Precision. |
| Copyright (C) 1997-2019 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; |
| }; |
| |
| #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) |
| |
| #define FP_CMP_EQ_H(r, X, Y, ex) _FP_CMP_EQ (H, 1, (r), X, Y, (ex)) |
| #endif /* !SOFT_FP_HALF_H */ |