| /* Software floating-point emulation. |
| Basic four-word fraction declaration and manipulation. |
| Copyright (C) 1997-2019 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Richard Henderson (rth@cygnus.com), |
| Jakub Jelinek (jj@ultra.linux.cz), |
| David S. Miller (davem@redhat.com) and |
| Peter Maydell (pmaydell@chiark.greenend.org.uk). |
| |
| 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_OP_4_H |
| #define SOFT_FP_OP_4_H 1 |
| |
| #define _FP_FRAC_DECL_4(X) _FP_W_TYPE X##_f[4] |
| #define _FP_FRAC_COPY_4(D, S) \ |
| (D##_f[0] = S##_f[0], D##_f[1] = S##_f[1], \ |
| D##_f[2] = S##_f[2], D##_f[3] = S##_f[3]) |
| #define _FP_FRAC_SET_4(X, I) __FP_FRAC_SET_4 (X, I) |
| #define _FP_FRAC_HIGH_4(X) (X##_f[3]) |
| #define _FP_FRAC_LOW_4(X) (X##_f[0]) |
| #define _FP_FRAC_WORD_4(X, w) (X##_f[w]) |
| |
| #define _FP_FRAC_SLL_4(X, N) \ |
| do \ |
| { \ |
| _FP_I_TYPE _FP_FRAC_SLL_4_up, _FP_FRAC_SLL_4_down; \ |
| _FP_I_TYPE _FP_FRAC_SLL_4_skip, _FP_FRAC_SLL_4_i; \ |
| _FP_FRAC_SLL_4_skip = (N) / _FP_W_TYPE_SIZE; \ |
| _FP_FRAC_SLL_4_up = (N) % _FP_W_TYPE_SIZE; \ |
| _FP_FRAC_SLL_4_down = _FP_W_TYPE_SIZE - _FP_FRAC_SLL_4_up; \ |
| if (!_FP_FRAC_SLL_4_up) \ |
| for (_FP_FRAC_SLL_4_i = 3; \ |
| _FP_FRAC_SLL_4_i >= _FP_FRAC_SLL_4_skip; \ |
| --_FP_FRAC_SLL_4_i) \ |
| X##_f[_FP_FRAC_SLL_4_i] \ |
| = X##_f[_FP_FRAC_SLL_4_i-_FP_FRAC_SLL_4_skip]; \ |
| else \ |
| { \ |
| for (_FP_FRAC_SLL_4_i = 3; \ |
| _FP_FRAC_SLL_4_i > _FP_FRAC_SLL_4_skip; \ |
| --_FP_FRAC_SLL_4_i) \ |
| X##_f[_FP_FRAC_SLL_4_i] \ |
| = ((X##_f[_FP_FRAC_SLL_4_i-_FP_FRAC_SLL_4_skip] \ |
| << _FP_FRAC_SLL_4_up) \ |
| | (X##_f[_FP_FRAC_SLL_4_i-_FP_FRAC_SLL_4_skip-1] \ |
| >> _FP_FRAC_SLL_4_down)); \ |
| X##_f[_FP_FRAC_SLL_4_i--] = X##_f[0] << _FP_FRAC_SLL_4_up; \ |
| } \ |
| for (; _FP_FRAC_SLL_4_i >= 0; --_FP_FRAC_SLL_4_i) \ |
| X##_f[_FP_FRAC_SLL_4_i] = 0; \ |
| } \ |
| while (0) |
| |
| /* This one was broken too. */ |
| #define _FP_FRAC_SRL_4(X, N) \ |
| do \ |
| { \ |
| _FP_I_TYPE _FP_FRAC_SRL_4_up, _FP_FRAC_SRL_4_down; \ |
| _FP_I_TYPE _FP_FRAC_SRL_4_skip, _FP_FRAC_SRL_4_i; \ |
| _FP_FRAC_SRL_4_skip = (N) / _FP_W_TYPE_SIZE; \ |
| _FP_FRAC_SRL_4_down = (N) % _FP_W_TYPE_SIZE; \ |
| _FP_FRAC_SRL_4_up = _FP_W_TYPE_SIZE - _FP_FRAC_SRL_4_down; \ |
| if (!_FP_FRAC_SRL_4_down) \ |
| for (_FP_FRAC_SRL_4_i = 0; \ |
| _FP_FRAC_SRL_4_i <= 3-_FP_FRAC_SRL_4_skip; \ |
| ++_FP_FRAC_SRL_4_i) \ |
| X##_f[_FP_FRAC_SRL_4_i] \ |
| = X##_f[_FP_FRAC_SRL_4_i+_FP_FRAC_SRL_4_skip]; \ |
| else \ |
| { \ |
| for (_FP_FRAC_SRL_4_i = 0; \ |
| _FP_FRAC_SRL_4_i < 3-_FP_FRAC_SRL_4_skip; \ |
| ++_FP_FRAC_SRL_4_i) \ |
| X##_f[_FP_FRAC_SRL_4_i] \ |
| = ((X##_f[_FP_FRAC_SRL_4_i+_FP_FRAC_SRL_4_skip] \ |
| >> _FP_FRAC_SRL_4_down) \ |
| | (X##_f[_FP_FRAC_SRL_4_i+_FP_FRAC_SRL_4_skip+1] \ |
| << _FP_FRAC_SRL_4_up)); \ |
| X##_f[_FP_FRAC_SRL_4_i++] = X##_f[3] >> _FP_FRAC_SRL_4_down; \ |
| } \ |
| for (; _FP_FRAC_SRL_4_i < 4; ++_FP_FRAC_SRL_4_i) \ |
| X##_f[_FP_FRAC_SRL_4_i] = 0; \ |
| } \ |
| while (0) |
| |
| |
| /* Right shift with sticky-lsb. |
| What this actually means is that we do a standard right-shift, |
| but that if any of the bits that fall off the right hand side |
| were one then we always set the LSbit. */ |
| #define _FP_FRAC_SRST_4(X, S, N, size) \ |
| do \ |
| { \ |
| _FP_I_TYPE _FP_FRAC_SRST_4_up, _FP_FRAC_SRST_4_down; \ |
| _FP_I_TYPE _FP_FRAC_SRST_4_skip, _FP_FRAC_SRST_4_i; \ |
| _FP_W_TYPE _FP_FRAC_SRST_4_s; \ |
| _FP_FRAC_SRST_4_skip = (N) / _FP_W_TYPE_SIZE; \ |
| _FP_FRAC_SRST_4_down = (N) % _FP_W_TYPE_SIZE; \ |
| _FP_FRAC_SRST_4_up = _FP_W_TYPE_SIZE - _FP_FRAC_SRST_4_down; \ |
| for (_FP_FRAC_SRST_4_s = _FP_FRAC_SRST_4_i = 0; \ |
| _FP_FRAC_SRST_4_i < _FP_FRAC_SRST_4_skip; \ |
| ++_FP_FRAC_SRST_4_i) \ |
| _FP_FRAC_SRST_4_s |= X##_f[_FP_FRAC_SRST_4_i]; \ |
| if (!_FP_FRAC_SRST_4_down) \ |
| for (_FP_FRAC_SRST_4_i = 0; \ |
| _FP_FRAC_SRST_4_i <= 3-_FP_FRAC_SRST_4_skip; \ |
| ++_FP_FRAC_SRST_4_i) \ |
| X##_f[_FP_FRAC_SRST_4_i] \ |
| = X##_f[_FP_FRAC_SRST_4_i+_FP_FRAC_SRST_4_skip]; \ |
| else \ |
| { \ |
| _FP_FRAC_SRST_4_s \ |
| |= X##_f[_FP_FRAC_SRST_4_i] << _FP_FRAC_SRST_4_up; \ |
| for (_FP_FRAC_SRST_4_i = 0; \ |
| _FP_FRAC_SRST_4_i < 3-_FP_FRAC_SRST_4_skip; \ |
| ++_FP_FRAC_SRST_4_i) \ |
| X##_f[_FP_FRAC_SRST_4_i] \ |
| = ((X##_f[_FP_FRAC_SRST_4_i+_FP_FRAC_SRST_4_skip] \ |
| >> _FP_FRAC_SRST_4_down) \ |
| | (X##_f[_FP_FRAC_SRST_4_i+_FP_FRAC_SRST_4_skip+1] \ |
| << _FP_FRAC_SRST_4_up)); \ |
| X##_f[_FP_FRAC_SRST_4_i++] \ |
| = X##_f[3] >> _FP_FRAC_SRST_4_down; \ |
| } \ |
| for (; _FP_FRAC_SRST_4_i < 4; ++_FP_FRAC_SRST_4_i) \ |
| X##_f[_FP_FRAC_SRST_4_i] = 0; \ |
| S = (_FP_FRAC_SRST_4_s != 0); \ |
| } \ |
| while (0) |
| |
| #define _FP_FRAC_SRS_4(X, N, size) \ |
| do \ |
| { \ |
| int _FP_FRAC_SRS_4_sticky; \ |
| _FP_FRAC_SRST_4 (X, _FP_FRAC_SRS_4_sticky, (N), (size)); \ |
| X##_f[0] |= _FP_FRAC_SRS_4_sticky; \ |
| } \ |
| while (0) |
| |
| #define _FP_FRAC_ADD_4(R, X, Y) \ |
| __FP_FRAC_ADD_4 (R##_f[3], R##_f[2], R##_f[1], R##_f[0], \ |
| X##_f[3], X##_f[2], X##_f[1], X##_f[0], \ |
| Y##_f[3], Y##_f[2], Y##_f[1], Y##_f[0]) |
| |
| #define _FP_FRAC_SUB_4(R, X, Y) \ |
| __FP_FRAC_SUB_4 (R##_f[3], R##_f[2], R##_f[1], R##_f[0], \ |
| X##_f[3], X##_f[2], X##_f[1], X##_f[0], \ |
| Y##_f[3], Y##_f[2], Y##_f[1], Y##_f[0]) |
| |
| #define _FP_FRAC_DEC_4(X, Y) \ |
| __FP_FRAC_DEC_4 (X##_f[3], X##_f[2], X##_f[1], X##_f[0], \ |
| Y##_f[3], Y##_f[2], Y##_f[1], Y##_f[0]) |
| |
| #define _FP_FRAC_ADDI_4(X, I) \ |
| __FP_FRAC_ADDI_4 (X##_f[3], X##_f[2], X##_f[1], X##_f[0], I) |
| |
| #define _FP_ZEROFRAC_4 0, 0, 0, 0 |
| #define _FP_MINFRAC_4 0, 0, 0, 1 |
| #define _FP_MAXFRAC_4 (~(_FP_WS_TYPE) 0), (~(_FP_WS_TYPE) 0), (~(_FP_WS_TYPE) 0), (~(_FP_WS_TYPE) 0) |
| |
| #define _FP_FRAC_ZEROP_4(X) ((X##_f[0] | X##_f[1] | X##_f[2] | X##_f[3]) == 0) |
| #define _FP_FRAC_NEGP_4(X) ((_FP_WS_TYPE) X##_f[3] < 0) |
| #define _FP_FRAC_OVERP_4(fs, X) (_FP_FRAC_HIGH_##fs (X) & _FP_OVERFLOW_##fs) |
| #define _FP_FRAC_HIGHBIT_DW_4(fs, X) \ |
| (_FP_FRAC_HIGH_DW_##fs (X) & _FP_HIGHBIT_DW_##fs) |
| #define _FP_FRAC_CLEAR_OVERP_4(fs, X) (_FP_FRAC_HIGH_##fs (X) &= ~_FP_OVERFLOW_##fs) |
| |
| #define _FP_FRAC_EQ_4(X, Y) \ |
| (X##_f[0] == Y##_f[0] && X##_f[1] == Y##_f[1] \ |
| && X##_f[2] == Y##_f[2] && X##_f[3] == Y##_f[3]) |
| |
| #define _FP_FRAC_GT_4(X, Y) \ |
| (X##_f[3] > Y##_f[3] \ |
| || (X##_f[3] == Y##_f[3] \ |
| && (X##_f[2] > Y##_f[2] \ |
| || (X##_f[2] == Y##_f[2] \ |
| && (X##_f[1] > Y##_f[1] \ |
| || (X##_f[1] == Y##_f[1] \ |
| && X##_f[0] > Y##_f[0])))))) |
| |
| #define _FP_FRAC_GE_4(X, Y) \ |
| (X##_f[3] > Y##_f[3] \ |
| || (X##_f[3] == Y##_f[3] \ |
| && (X##_f[2] > Y##_f[2] \ |
| || (X##_f[2] == Y##_f[2] \ |
| && (X##_f[1] > Y##_f[1] \ |
| || (X##_f[1] == Y##_f[1] \ |
| && X##_f[0] >= Y##_f[0])))))) |
| |
| |
| #define _FP_FRAC_CLZ_4(R, X) \ |
| do \ |
| { \ |
| if (X##_f[3]) \ |
| __FP_CLZ ((R), X##_f[3]); \ |
| else if (X##_f[2]) \ |
| { \ |
| __FP_CLZ ((R), X##_f[2]); \ |
| (R) += _FP_W_TYPE_SIZE; \ |
| } \ |
| else if (X##_f[1]) \ |
| { \ |
| __FP_CLZ ((R), X##_f[1]); \ |
| (R) += _FP_W_TYPE_SIZE*2; \ |
| } \ |
| else \ |
| { \ |
| __FP_CLZ ((R), X##_f[0]); \ |
| (R) += _FP_W_TYPE_SIZE*3; \ |
| } \ |
| } \ |
| while (0) |
| |
| |
| #define _FP_UNPACK_RAW_4(fs, X, val) \ |
| do \ |
| { \ |
| union _FP_UNION_##fs _FP_UNPACK_RAW_4_flo; \ |
| _FP_UNPACK_RAW_4_flo.flt = (val); \ |
| X##_f[0] = _FP_UNPACK_RAW_4_flo.bits.frac0; \ |
| X##_f[1] = _FP_UNPACK_RAW_4_flo.bits.frac1; \ |
| X##_f[2] = _FP_UNPACK_RAW_4_flo.bits.frac2; \ |
| X##_f[3] = _FP_UNPACK_RAW_4_flo.bits.frac3; \ |
| X##_e = _FP_UNPACK_RAW_4_flo.bits.exp; \ |
| X##_s = _FP_UNPACK_RAW_4_flo.bits.sign; \ |
| } \ |
| while (0) |
| |
| #define _FP_UNPACK_RAW_4_P(fs, X, val) \ |
| do \ |
| { \ |
| union _FP_UNION_##fs *_FP_UNPACK_RAW_4_P_flo \ |
| = (union _FP_UNION_##fs *) (val); \ |
| \ |
| X##_f[0] = _FP_UNPACK_RAW_4_P_flo->bits.frac0; \ |
| X##_f[1] = _FP_UNPACK_RAW_4_P_flo->bits.frac1; \ |
| X##_f[2] = _FP_UNPACK_RAW_4_P_flo->bits.frac2; \ |
| X##_f[3] = _FP_UNPACK_RAW_4_P_flo->bits.frac3; \ |
| X##_e = _FP_UNPACK_RAW_4_P_flo->bits.exp; \ |
| X##_s = _FP_UNPACK_RAW_4_P_flo->bits.sign; \ |
| } \ |
| while (0) |
| |
| #define _FP_PACK_RAW_4(fs, val, X) \ |
| do \ |
| { \ |
| union _FP_UNION_##fs _FP_PACK_RAW_4_flo; \ |
| _FP_PACK_RAW_4_flo.bits.frac0 = X##_f[0]; \ |
| _FP_PACK_RAW_4_flo.bits.frac1 = X##_f[1]; \ |
| _FP_PACK_RAW_4_flo.bits.frac2 = X##_f[2]; \ |
| _FP_PACK_RAW_4_flo.bits.frac3 = X##_f[3]; \ |
| _FP_PACK_RAW_4_flo.bits.exp = X##_e; \ |
| _FP_PACK_RAW_4_flo.bits.sign = X##_s; \ |
| (val) = _FP_PACK_RAW_4_flo.flt; \ |
| } \ |
| while (0) |
| |
| #define _FP_PACK_RAW_4_P(fs, val, X) \ |
| do \ |
| { \ |
| union _FP_UNION_##fs *_FP_PACK_RAW_4_P_flo \ |
| = (union _FP_UNION_##fs *) (val); \ |
| \ |
| _FP_PACK_RAW_4_P_flo->bits.frac0 = X##_f[0]; \ |
| _FP_PACK_RAW_4_P_flo->bits.frac1 = X##_f[1]; \ |
| _FP_PACK_RAW_4_P_flo->bits.frac2 = X##_f[2]; \ |
| _FP_PACK_RAW_4_P_flo->bits.frac3 = X##_f[3]; \ |
| _FP_PACK_RAW_4_P_flo->bits.exp = X##_e; \ |
| _FP_PACK_RAW_4_P_flo->bits.sign = X##_s; \ |
| } \ |
| while (0) |
| |
| /* Multiplication algorithms: */ |
| |
| /* Given a 1W * 1W => 2W primitive, do the extended multiplication. */ |
| |
| #define _FP_MUL_MEAT_DW_4_wide(wfracbits, R, X, Y, doit) \ |
| do \ |
| { \ |
| _FP_FRAC_DECL_2 (_FP_MUL_MEAT_DW_4_wide_b); \ |
| _FP_FRAC_DECL_2 (_FP_MUL_MEAT_DW_4_wide_c); \ |
| _FP_FRAC_DECL_2 (_FP_MUL_MEAT_DW_4_wide_d); \ |
| _FP_FRAC_DECL_2 (_FP_MUL_MEAT_DW_4_wide_e); \ |
| _FP_FRAC_DECL_2 (_FP_MUL_MEAT_DW_4_wide_f); \ |
| \ |
| doit (_FP_FRAC_WORD_8 (R, 1), _FP_FRAC_WORD_8 (R, 0), \ |
| X##_f[0], Y##_f[0]); \ |
| doit (_FP_MUL_MEAT_DW_4_wide_b_f1, _FP_MUL_MEAT_DW_4_wide_b_f0, \ |
| X##_f[0], Y##_f[1]); \ |
| doit (_FP_MUL_MEAT_DW_4_wide_c_f1, _FP_MUL_MEAT_DW_4_wide_c_f0, \ |
| X##_f[1], Y##_f[0]); \ |
| doit (_FP_MUL_MEAT_DW_4_wide_d_f1, _FP_MUL_MEAT_DW_4_wide_d_f0, \ |
| X##_f[1], Y##_f[1]); \ |
| doit (_FP_MUL_MEAT_DW_4_wide_e_f1, _FP_MUL_MEAT_DW_4_wide_e_f0, \ |
| X##_f[0], Y##_f[2]); \ |
| doit (_FP_MUL_MEAT_DW_4_wide_f_f1, _FP_MUL_MEAT_DW_4_wide_f_f0, \ |
| X##_f[2], Y##_f[0]); \ |
| __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 3), _FP_FRAC_WORD_8 (R, 2), \ |
| _FP_FRAC_WORD_8 (R, 1), 0, \ |
| _FP_MUL_MEAT_DW_4_wide_b_f1, \ |
| _FP_MUL_MEAT_DW_4_wide_b_f0, \ |
| 0, 0, _FP_FRAC_WORD_8 (R, 1)); \ |
| __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 3), _FP_FRAC_WORD_8 (R, 2), \ |
| _FP_FRAC_WORD_8 (R, 1), 0, \ |
| _FP_MUL_MEAT_DW_4_wide_c_f1, \ |
| _FP_MUL_MEAT_DW_4_wide_c_f0, \ |
| _FP_FRAC_WORD_8 (R, 3), _FP_FRAC_WORD_8 (R, 2), \ |
| _FP_FRAC_WORD_8 (R, 1)); \ |
| __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 4), _FP_FRAC_WORD_8 (R, 3), \ |
| _FP_FRAC_WORD_8 (R, 2), 0, \ |
| _FP_MUL_MEAT_DW_4_wide_d_f1, \ |
| _FP_MUL_MEAT_DW_4_wide_d_f0, \ |
| 0, _FP_FRAC_WORD_8 (R, 3), _FP_FRAC_WORD_8 (R, 2)); \ |
| __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 4), _FP_FRAC_WORD_8 (R, 3), \ |
| _FP_FRAC_WORD_8 (R, 2), 0, \ |
| _FP_MUL_MEAT_DW_4_wide_e_f1, \ |
| _FP_MUL_MEAT_DW_4_wide_e_f0, \ |
| _FP_FRAC_WORD_8 (R, 4), _FP_FRAC_WORD_8 (R, 3), \ |
| _FP_FRAC_WORD_8 (R, 2)); \ |
| __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 4), _FP_FRAC_WORD_8 (R, 3), \ |
| _FP_FRAC_WORD_8 (R, 2), 0, \ |
| _FP_MUL_MEAT_DW_4_wide_f_f1, \ |
| _FP_MUL_MEAT_DW_4_wide_f_f0, \ |
| _FP_FRAC_WORD_8 (R, 4), _FP_FRAC_WORD_8 (R, 3), \ |
| _FP_FRAC_WORD_8 (R, 2)); \ |
| doit (_FP_MUL_MEAT_DW_4_wide_b_f1, \ |
| _FP_MUL_MEAT_DW_4_wide_b_f0, X##_f[0], Y##_f[3]); \ |
| doit (_FP_MUL_MEAT_DW_4_wide_c_f1, \ |
| _FP_MUL_MEAT_DW_4_wide_c_f0, X##_f[3], Y##_f[0]); \ |
| doit (_FP_MUL_MEAT_DW_4_wide_d_f1, _FP_MUL_MEAT_DW_4_wide_d_f0, \ |
| X##_f[1], Y##_f[2]); \ |
| doit (_FP_MUL_MEAT_DW_4_wide_e_f1, _FP_MUL_MEAT_DW_4_wide_e_f0, \ |
| X##_f[2], Y##_f[1]); \ |
| __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 5), _FP_FRAC_WORD_8 (R, 4), \ |
| _FP_FRAC_WORD_8 (R, 3), 0, \ |
| _FP_MUL_MEAT_DW_4_wide_b_f1, \ |
| _FP_MUL_MEAT_DW_4_wide_b_f0, \ |
| 0, _FP_FRAC_WORD_8 (R, 4), _FP_FRAC_WORD_8 (R, 3)); \ |
| __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 5), _FP_FRAC_WORD_8 (R, 4), \ |
| _FP_FRAC_WORD_8 (R, 3), 0, \ |
| _FP_MUL_MEAT_DW_4_wide_c_f1, \ |
| _FP_MUL_MEAT_DW_4_wide_c_f0, \ |
| _FP_FRAC_WORD_8 (R, 5), _FP_FRAC_WORD_8 (R, 4), \ |
| _FP_FRAC_WORD_8 (R, 3)); \ |
| __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 5), _FP_FRAC_WORD_8 (R, 4), \ |
| _FP_FRAC_WORD_8 (R, 3), 0, \ |
| _FP_MUL_MEAT_DW_4_wide_d_f1, \ |
| _FP_MUL_MEAT_DW_4_wide_d_f0, \ |
| _FP_FRAC_WORD_8 (R, 5), _FP_FRAC_WORD_8 (R, 4), \ |
| _FP_FRAC_WORD_8 (R, 3)); \ |
| __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 5), _FP_FRAC_WORD_8 (R, 4), \ |
| _FP_FRAC_WORD_8 (R, 3), 0, \ |
| _FP_MUL_MEAT_DW_4_wide_e_f1, \ |
| _FP_MUL_MEAT_DW_4_wide_e_f0, \ |
| _FP_FRAC_WORD_8 (R, 5), _FP_FRAC_WORD_8 (R, 4), \ |
| _FP_FRAC_WORD_8 (R, 3)); \ |
| doit (_FP_MUL_MEAT_DW_4_wide_b_f1, _FP_MUL_MEAT_DW_4_wide_b_f0, \ |
| X##_f[2], Y##_f[2]); \ |
| doit (_FP_MUL_MEAT_DW_4_wide_c_f1, _FP_MUL_MEAT_DW_4_wide_c_f0, \ |
| X##_f[1], Y##_f[3]); \ |
| doit (_FP_MUL_MEAT_DW_4_wide_d_f1, _FP_MUL_MEAT_DW_4_wide_d_f0, \ |
| X##_f[3], Y##_f[1]); \ |
| doit (_FP_MUL_MEAT_DW_4_wide_e_f1, _FP_MUL_MEAT_DW_4_wide_e_f0, \ |
| X##_f[2], Y##_f[3]); \ |
| doit (_FP_MUL_MEAT_DW_4_wide_f_f1, _FP_MUL_MEAT_DW_4_wide_f_f0, \ |
| X##_f[3], Y##_f[2]); \ |
| __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 6), _FP_FRAC_WORD_8 (R, 5), \ |
| _FP_FRAC_WORD_8 (R, 4), 0, \ |
| _FP_MUL_MEAT_DW_4_wide_b_f1, \ |
| _FP_MUL_MEAT_DW_4_wide_b_f0, \ |
| 0, _FP_FRAC_WORD_8 (R, 5), _FP_FRAC_WORD_8 (R, 4)); \ |
| __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 6), _FP_FRAC_WORD_8 (R, 5), \ |
| _FP_FRAC_WORD_8 (R, 4), 0, \ |
| _FP_MUL_MEAT_DW_4_wide_c_f1, \ |
| _FP_MUL_MEAT_DW_4_wide_c_f0, \ |
| _FP_FRAC_WORD_8 (R, 6), _FP_FRAC_WORD_8 (R, 5), \ |
| _FP_FRAC_WORD_8 (R, 4)); \ |
| __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 6), _FP_FRAC_WORD_8 (R, 5), \ |
| _FP_FRAC_WORD_8 (R, 4), 0, \ |
| _FP_MUL_MEAT_DW_4_wide_d_f1, \ |
| _FP_MUL_MEAT_DW_4_wide_d_f0, \ |
| _FP_FRAC_WORD_8 (R, 6), _FP_FRAC_WORD_8 (R, 5), \ |
| _FP_FRAC_WORD_8 (R, 4)); \ |
| __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 7), _FP_FRAC_WORD_8 (R, 6), \ |
| _FP_FRAC_WORD_8 (R, 5), 0, \ |
| _FP_MUL_MEAT_DW_4_wide_e_f1, \ |
| _FP_MUL_MEAT_DW_4_wide_e_f0, \ |
| 0, _FP_FRAC_WORD_8 (R, 6), _FP_FRAC_WORD_8 (R, 5)); \ |
| __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 7), _FP_FRAC_WORD_8 (R, 6), \ |
| _FP_FRAC_WORD_8 (R, 5), 0, \ |
| _FP_MUL_MEAT_DW_4_wide_f_f1, \ |
| _FP_MUL_MEAT_DW_4_wide_f_f0, \ |
| _FP_FRAC_WORD_8 (R, 7), _FP_FRAC_WORD_8 (R, 6), \ |
| _FP_FRAC_WORD_8 (R, 5)); \ |
| doit (_FP_MUL_MEAT_DW_4_wide_b_f1, _FP_MUL_MEAT_DW_4_wide_b_f0, \ |
| X##_f[3], Y##_f[3]); \ |
| __FP_FRAC_ADD_2 (_FP_FRAC_WORD_8 (R, 7), _FP_FRAC_WORD_8 (R, 6), \ |
| _FP_MUL_MEAT_DW_4_wide_b_f1, \ |
| _FP_MUL_MEAT_DW_4_wide_b_f0, \ |
| _FP_FRAC_WORD_8 (R, 7), _FP_FRAC_WORD_8 (R, 6)); \ |
| } \ |
| while (0) |
| |
| #define _FP_MUL_MEAT_4_wide(wfracbits, R, X, Y, doit) \ |
| do \ |
| { \ |
| _FP_FRAC_DECL_8 (_FP_MUL_MEAT_4_wide_z); \ |
| \ |
| _FP_MUL_MEAT_DW_4_wide ((wfracbits), _FP_MUL_MEAT_4_wide_z, \ |
| X, Y, doit); \ |
| \ |
| /* Normalize since we know where the msb of the multiplicands \ |
| were (bit B), we know that the msb of the of the product is \ |
| at either 2B or 2B-1. */ \ |
| _FP_FRAC_SRS_8 (_FP_MUL_MEAT_4_wide_z, (wfracbits)-1, \ |
| 2*(wfracbits)); \ |
| __FP_FRAC_SET_4 (R, _FP_FRAC_WORD_8 (_FP_MUL_MEAT_4_wide_z, 3), \ |
| _FP_FRAC_WORD_8 (_FP_MUL_MEAT_4_wide_z, 2), \ |
| _FP_FRAC_WORD_8 (_FP_MUL_MEAT_4_wide_z, 1), \ |
| _FP_FRAC_WORD_8 (_FP_MUL_MEAT_4_wide_z, 0)); \ |
| } \ |
| while (0) |
| |
| #define _FP_MUL_MEAT_DW_4_gmp(wfracbits, R, X, Y) \ |
| do \ |
| { \ |
| mpn_mul_n (R##_f, _x_f, _y_f, 4); \ |
| } \ |
| while (0) |
| |
| #define _FP_MUL_MEAT_4_gmp(wfracbits, R, X, Y) \ |
| do \ |
| { \ |
| _FP_FRAC_DECL_8 (_FP_MUL_MEAT_4_gmp_z); \ |
| \ |
| _FP_MUL_MEAT_DW_4_gmp ((wfracbits), _FP_MUL_MEAT_4_gmp_z, X, Y); \ |
| \ |
| /* Normalize since we know where the msb of the multiplicands \ |
| were (bit B), we know that the msb of the of the product is \ |
| at either 2B or 2B-1. */ \ |
| _FP_FRAC_SRS_8 (_FP_MUL_MEAT_4_gmp_z, (wfracbits)-1, \ |
| 2*(wfracbits)); \ |
| __FP_FRAC_SET_4 (R, _FP_FRAC_WORD_8 (_FP_MUL_MEAT_4_gmp_z, 3), \ |
| _FP_FRAC_WORD_8 (_FP_MUL_MEAT_4_gmp_z, 2), \ |
| _FP_FRAC_WORD_8 (_FP_MUL_MEAT_4_gmp_z, 1), \ |
| _FP_FRAC_WORD_8 (_FP_MUL_MEAT_4_gmp_z, 0)); \ |
| } \ |
| while (0) |
| |
| /* Helper utility for _FP_DIV_MEAT_4_udiv: |
| * pppp = m * nnn. */ |
| #define umul_ppppmnnn(p3, p2, p1, p0, m, n2, n1, n0) \ |
| do \ |
| { \ |
| UWtype umul_ppppmnnn_t; \ |
| umul_ppmm (p1, p0, m, n0); \ |
| umul_ppmm (p2, umul_ppppmnnn_t, m, n1); \ |
| __FP_FRAC_ADDI_2 (p2, p1, umul_ppppmnnn_t); \ |
| umul_ppmm (p3, umul_ppppmnnn_t, m, n2); \ |
| __FP_FRAC_ADDI_2 (p3, p2, umul_ppppmnnn_t); \ |
| } \ |
| while (0) |
| |
| /* Division algorithms: */ |
| |
| #define _FP_DIV_MEAT_4_udiv(fs, R, X, Y) \ |
| do \ |
| { \ |
| int _FP_DIV_MEAT_4_udiv_i; \ |
| _FP_FRAC_DECL_4 (_FP_DIV_MEAT_4_udiv_n); \ |
| _FP_FRAC_DECL_4 (_FP_DIV_MEAT_4_udiv_m); \ |
| _FP_FRAC_SET_4 (_FP_DIV_MEAT_4_udiv_n, _FP_ZEROFRAC_4); \ |
| if (_FP_FRAC_GE_4 (X, Y)) \ |
| { \ |
| _FP_DIV_MEAT_4_udiv_n_f[3] \ |
| = X##_f[0] << (_FP_W_TYPE_SIZE - 1); \ |
| _FP_FRAC_SRL_4 (X, 1); \ |
| } \ |
| else \ |
| R##_e--; \ |
| \ |
| /* Normalize, i.e. make the most significant bit of the \ |
| denominator set. */ \ |
| _FP_FRAC_SLL_4 (Y, _FP_WFRACXBITS_##fs); \ |
| \ |
| for (_FP_DIV_MEAT_4_udiv_i = 3; ; _FP_DIV_MEAT_4_udiv_i--) \ |
| { \ |
| if (X##_f[3] == Y##_f[3]) \ |
| { \ |
| /* This is a special case, not an optimization \ |
| (X##_f[3]/Y##_f[3] would not fit into UWtype). \ |
| As X## is guaranteed to be < Y, \ |
| R##_f[_FP_DIV_MEAT_4_udiv_i] can be either \ |
| (UWtype)-1 or (UWtype)-2. */ \ |
| R##_f[_FP_DIV_MEAT_4_udiv_i] = -1; \ |
| if (!_FP_DIV_MEAT_4_udiv_i) \ |
| break; \ |
| __FP_FRAC_SUB_4 (X##_f[3], X##_f[2], X##_f[1], X##_f[0], \ |
| Y##_f[2], Y##_f[1], Y##_f[0], 0, \ |
| X##_f[2], X##_f[1], X##_f[0], \ |
| _FP_DIV_MEAT_4_udiv_n_f[_FP_DIV_MEAT_4_udiv_i]); \ |
| _FP_FRAC_SUB_4 (X, Y, X); \ |
| if (X##_f[3] > Y##_f[3]) \ |
| { \ |
| R##_f[_FP_DIV_MEAT_4_udiv_i] = -2; \ |
| _FP_FRAC_ADD_4 (X, Y, X); \ |
| } \ |
| } \ |
| else \ |
| { \ |
| udiv_qrnnd (R##_f[_FP_DIV_MEAT_4_udiv_i], \ |
| X##_f[3], X##_f[3], X##_f[2], Y##_f[3]); \ |
| umul_ppppmnnn (_FP_DIV_MEAT_4_udiv_m_f[3], \ |
| _FP_DIV_MEAT_4_udiv_m_f[2], \ |
| _FP_DIV_MEAT_4_udiv_m_f[1], \ |
| _FP_DIV_MEAT_4_udiv_m_f[0], \ |
| R##_f[_FP_DIV_MEAT_4_udiv_i], \ |
| Y##_f[2], Y##_f[1], Y##_f[0]); \ |
| X##_f[2] = X##_f[1]; \ |
| X##_f[1] = X##_f[0]; \ |
| X##_f[0] \ |
| = _FP_DIV_MEAT_4_udiv_n_f[_FP_DIV_MEAT_4_udiv_i]; \ |
| if (_FP_FRAC_GT_4 (_FP_DIV_MEAT_4_udiv_m, X)) \ |
| { \ |
| R##_f[_FP_DIV_MEAT_4_udiv_i]--; \ |
| _FP_FRAC_ADD_4 (X, Y, X); \ |
| if (_FP_FRAC_GE_4 (X, Y) \ |
| && _FP_FRAC_GT_4 (_FP_DIV_MEAT_4_udiv_m, X)) \ |
| { \ |
| R##_f[_FP_DIV_MEAT_4_udiv_i]--; \ |
| _FP_FRAC_ADD_4 (X, Y, X); \ |
| } \ |
| } \ |
| _FP_FRAC_DEC_4 (X, _FP_DIV_MEAT_4_udiv_m); \ |
| if (!_FP_DIV_MEAT_4_udiv_i) \ |
| { \ |
| if (!_FP_FRAC_EQ_4 (X, _FP_DIV_MEAT_4_udiv_m)) \ |
| R##_f[0] |= _FP_WORK_STICKY; \ |
| break; \ |
| } \ |
| } \ |
| } \ |
| } \ |
| while (0) |
| |
| |
| /* Square root algorithms: |
| We have just one right now, maybe Newton approximation |
| should be added for those machines where division is fast. */ |
| |
| #define _FP_SQRT_MEAT_4(R, S, T, X, q) \ |
| do \ |
| { \ |
| while (q) \ |
| { \ |
| T##_f[3] = S##_f[3] + (q); \ |
| if (T##_f[3] <= X##_f[3]) \ |
| { \ |
| S##_f[3] = T##_f[3] + (q); \ |
| X##_f[3] -= T##_f[3]; \ |
| R##_f[3] += (q); \ |
| } \ |
| _FP_FRAC_SLL_4 (X, 1); \ |
| (q) >>= 1; \ |
| } \ |
| (q) = (_FP_W_TYPE) 1 << (_FP_W_TYPE_SIZE - 1); \ |
| while (q) \ |
| { \ |
| T##_f[2] = S##_f[2] + (q); \ |
| T##_f[3] = S##_f[3]; \ |
| if (T##_f[3] < X##_f[3] \ |
| || (T##_f[3] == X##_f[3] && T##_f[2] <= X##_f[2])) \ |
| { \ |
| S##_f[2] = T##_f[2] + (q); \ |
| S##_f[3] += (T##_f[2] > S##_f[2]); \ |
| __FP_FRAC_DEC_2 (X##_f[3], X##_f[2], \ |
| T##_f[3], T##_f[2]); \ |
| R##_f[2] += (q); \ |
| } \ |
| _FP_FRAC_SLL_4 (X, 1); \ |
| (q) >>= 1; \ |
| } \ |
| (q) = (_FP_W_TYPE) 1 << (_FP_W_TYPE_SIZE - 1); \ |
| while (q) \ |
| { \ |
| T##_f[1] = S##_f[1] + (q); \ |
| T##_f[2] = S##_f[2]; \ |
| T##_f[3] = S##_f[3]; \ |
| if (T##_f[3] < X##_f[3] \ |
| || (T##_f[3] == X##_f[3] \ |
| && (T##_f[2] < X##_f[2] \ |
| || (T##_f[2] == X##_f[2] \ |
| && T##_f[1] <= X##_f[1])))) \ |
| { \ |
| S##_f[1] = T##_f[1] + (q); \ |
| S##_f[2] += (T##_f[1] > S##_f[1]); \ |
| S##_f[3] += (T##_f[2] > S##_f[2]); \ |
| __FP_FRAC_DEC_3 (X##_f[3], X##_f[2], X##_f[1], \ |
| T##_f[3], T##_f[2], T##_f[1]); \ |
| R##_f[1] += (q); \ |
| } \ |
| _FP_FRAC_SLL_4 (X, 1); \ |
| (q) >>= 1; \ |
| } \ |
| (q) = (_FP_W_TYPE) 1 << (_FP_W_TYPE_SIZE - 1); \ |
| while ((q) != _FP_WORK_ROUND) \ |
| { \ |
| T##_f[0] = S##_f[0] + (q); \ |
| T##_f[1] = S##_f[1]; \ |
| T##_f[2] = S##_f[2]; \ |
| T##_f[3] = S##_f[3]; \ |
| if (_FP_FRAC_GE_4 (X, T)) \ |
| { \ |
| S##_f[0] = T##_f[0] + (q); \ |
| S##_f[1] += (T##_f[0] > S##_f[0]); \ |
| S##_f[2] += (T##_f[1] > S##_f[1]); \ |
| S##_f[3] += (T##_f[2] > S##_f[2]); \ |
| _FP_FRAC_DEC_4 (X, T); \ |
| R##_f[0] += (q); \ |
| } \ |
| _FP_FRAC_SLL_4 (X, 1); \ |
| (q) >>= 1; \ |
| } \ |
| if (!_FP_FRAC_ZEROP_4 (X)) \ |
| { \ |
| if (_FP_FRAC_GT_4 (X, S)) \ |
| R##_f[0] |= _FP_WORK_ROUND; \ |
| R##_f[0] |= _FP_WORK_STICKY; \ |
| } \ |
| } \ |
| while (0) |
| |
| |
| /* Internals. */ |
| |
| #define __FP_FRAC_SET_4(X, I3, I2, I1, I0) \ |
| (X##_f[3] = I3, X##_f[2] = I2, X##_f[1] = I1, X##_f[0] = I0) |
| |
| #ifndef __FP_FRAC_ADD_3 |
| # define __FP_FRAC_ADD_3(r2, r1, r0, x2, x1, x0, y2, y1, y0) \ |
| do \ |
| { \ |
| _FP_W_TYPE __FP_FRAC_ADD_3_c1, __FP_FRAC_ADD_3_c2; \ |
| r0 = x0 + y0; \ |
| __FP_FRAC_ADD_3_c1 = r0 < x0; \ |
| r1 = x1 + y1; \ |
| __FP_FRAC_ADD_3_c2 = r1 < x1; \ |
| r1 += __FP_FRAC_ADD_3_c1; \ |
| __FP_FRAC_ADD_3_c2 |= r1 < __FP_FRAC_ADD_3_c1; \ |
| r2 = x2 + y2 + __FP_FRAC_ADD_3_c2; \ |
| } \ |
| while (0) |
| #endif |
| |
| #ifndef __FP_FRAC_ADD_4 |
| # define __FP_FRAC_ADD_4(r3, r2, r1, r0, x3, x2, x1, x0, y3, y2, y1, y0) \ |
| do \ |
| { \ |
| _FP_W_TYPE __FP_FRAC_ADD_4_c1, __FP_FRAC_ADD_4_c2; \ |
| _FP_W_TYPE __FP_FRAC_ADD_4_c3; \ |
| r0 = x0 + y0; \ |
| __FP_FRAC_ADD_4_c1 = r0 < x0; \ |
| r1 = x1 + y1; \ |
| __FP_FRAC_ADD_4_c2 = r1 < x1; \ |
| r1 += __FP_FRAC_ADD_4_c1; \ |
| __FP_FRAC_ADD_4_c2 |= r1 < __FP_FRAC_ADD_4_c1; \ |
| r2 = x2 + y2; \ |
| __FP_FRAC_ADD_4_c3 = r2 < x2; \ |
| r2 += __FP_FRAC_ADD_4_c2; \ |
| __FP_FRAC_ADD_4_c3 |= r2 < __FP_FRAC_ADD_4_c2; \ |
| r3 = x3 + y3 + __FP_FRAC_ADD_4_c3; \ |
| } \ |
| while (0) |
| #endif |
| |
| #ifndef __FP_FRAC_SUB_3 |
| # define __FP_FRAC_SUB_3(r2, r1, r0, x2, x1, x0, y2, y1, y0) \ |
| do \ |
| { \ |
| _FP_W_TYPE __FP_FRAC_SUB_3_tmp[2]; \ |
| _FP_W_TYPE __FP_FRAC_SUB_3_c1, __FP_FRAC_SUB_3_c2; \ |
| __FP_FRAC_SUB_3_tmp[0] = x0 - y0; \ |
| __FP_FRAC_SUB_3_c1 = __FP_FRAC_SUB_3_tmp[0] > x0; \ |
| __FP_FRAC_SUB_3_tmp[1] = x1 - y1; \ |
| __FP_FRAC_SUB_3_c2 = __FP_FRAC_SUB_3_tmp[1] > x1; \ |
| __FP_FRAC_SUB_3_tmp[1] -= __FP_FRAC_SUB_3_c1; \ |
| __FP_FRAC_SUB_3_c2 |= __FP_FRAC_SUB_3_c1 && (y1 == x1); \ |
| r2 = x2 - y2 - __FP_FRAC_SUB_3_c2; \ |
| r1 = __FP_FRAC_SUB_3_tmp[1]; \ |
| r0 = __FP_FRAC_SUB_3_tmp[0]; \ |
| } \ |
| while (0) |
| #endif |
| |
| #ifndef __FP_FRAC_SUB_4 |
| # define __FP_FRAC_SUB_4(r3, r2, r1, r0, x3, x2, x1, x0, y3, y2, y1, y0) \ |
| do \ |
| { \ |
| _FP_W_TYPE __FP_FRAC_SUB_4_tmp[3]; \ |
| _FP_W_TYPE __FP_FRAC_SUB_4_c1, __FP_FRAC_SUB_4_c2; \ |
| _FP_W_TYPE __FP_FRAC_SUB_4_c3; \ |
| __FP_FRAC_SUB_4_tmp[0] = x0 - y0; \ |
| __FP_FRAC_SUB_4_c1 = __FP_FRAC_SUB_4_tmp[0] > x0; \ |
| __FP_FRAC_SUB_4_tmp[1] = x1 - y1; \ |
| __FP_FRAC_SUB_4_c2 = __FP_FRAC_SUB_4_tmp[1] > x1; \ |
| __FP_FRAC_SUB_4_tmp[1] -= __FP_FRAC_SUB_4_c1; \ |
| __FP_FRAC_SUB_4_c2 |= __FP_FRAC_SUB_4_c1 && (y1 == x1); \ |
| __FP_FRAC_SUB_4_tmp[2] = x2 - y2; \ |
| __FP_FRAC_SUB_4_c3 = __FP_FRAC_SUB_4_tmp[2] > x2; \ |
| __FP_FRAC_SUB_4_tmp[2] -= __FP_FRAC_SUB_4_c2; \ |
| __FP_FRAC_SUB_4_c3 |= __FP_FRAC_SUB_4_c2 && (y2 == x2); \ |
| r3 = x3 - y3 - __FP_FRAC_SUB_4_c3; \ |
| r2 = __FP_FRAC_SUB_4_tmp[2]; \ |
| r1 = __FP_FRAC_SUB_4_tmp[1]; \ |
| r0 = __FP_FRAC_SUB_4_tmp[0]; \ |
| } \ |
| while (0) |
| #endif |
| |
| #ifndef __FP_FRAC_DEC_3 |
| # define __FP_FRAC_DEC_3(x2, x1, x0, y2, y1, y0) \ |
| do \ |
| { \ |
| UWtype __FP_FRAC_DEC_3_t0, __FP_FRAC_DEC_3_t1; \ |
| UWtype __FP_FRAC_DEC_3_t2; \ |
| __FP_FRAC_DEC_3_t0 = x0; \ |
| __FP_FRAC_DEC_3_t1 = x1; \ |
| __FP_FRAC_DEC_3_t2 = x2; \ |
| __FP_FRAC_SUB_3 (x2, x1, x0, __FP_FRAC_DEC_3_t2, \ |
| __FP_FRAC_DEC_3_t1, __FP_FRAC_DEC_3_t0, \ |
| y2, y1, y0); \ |
| } \ |
| while (0) |
| #endif |
| |
| #ifndef __FP_FRAC_DEC_4 |
| # define __FP_FRAC_DEC_4(x3, x2, x1, x0, y3, y2, y1, y0) \ |
| do \ |
| { \ |
| UWtype __FP_FRAC_DEC_4_t0, __FP_FRAC_DEC_4_t1; \ |
| UWtype __FP_FRAC_DEC_4_t2, __FP_FRAC_DEC_4_t3; \ |
| __FP_FRAC_DEC_4_t0 = x0; \ |
| __FP_FRAC_DEC_4_t1 = x1; \ |
| __FP_FRAC_DEC_4_t2 = x2; \ |
| __FP_FRAC_DEC_4_t3 = x3; \ |
| __FP_FRAC_SUB_4 (x3, x2, x1, x0, __FP_FRAC_DEC_4_t3, \ |
| __FP_FRAC_DEC_4_t2, __FP_FRAC_DEC_4_t1, \ |
| __FP_FRAC_DEC_4_t0, y3, y2, y1, y0); \ |
| } \ |
| while (0) |
| #endif |
| |
| #ifndef __FP_FRAC_ADDI_4 |
| # define __FP_FRAC_ADDI_4(x3, x2, x1, x0, i) \ |
| do \ |
| { \ |
| UWtype __FP_FRAC_ADDI_4_t; \ |
| __FP_FRAC_ADDI_4_t = ((x0 += i) < i); \ |
| x1 += __FP_FRAC_ADDI_4_t; \ |
| __FP_FRAC_ADDI_4_t = (x1 < __FP_FRAC_ADDI_4_t); \ |
| x2 += __FP_FRAC_ADDI_4_t; \ |
| __FP_FRAC_ADDI_4_t = (x2 < __FP_FRAC_ADDI_4_t); \ |
| x3 += __FP_FRAC_ADDI_4_t; \ |
| } \ |
| while (0) |
| #endif |
| |
| /* Convert FP values between word sizes. This appears to be more |
| complicated than I'd have expected it to be, so these might be |
| wrong... These macros are in any case somewhat bogus because they |
| use information about what various FRAC_n variables look like |
| internally [eg, that 2 word vars are X_f0 and x_f1]. But so do |
| the ones in op-2.h and op-1.h. */ |
| #define _FP_FRAC_COPY_1_4(D, S) (D##_f = S##_f[0]) |
| |
| #define _FP_FRAC_COPY_2_4(D, S) \ |
| do \ |
| { \ |
| D##_f0 = S##_f[0]; \ |
| D##_f1 = S##_f[1]; \ |
| } \ |
| while (0) |
| |
| /* Assembly/disassembly for converting to/from integral types. |
| No shifting or overflow handled here. */ |
| /* Put the FP value X into r, which is an integer of size rsize. */ |
| #define _FP_FRAC_ASSEMBLE_4(r, X, rsize) \ |
| do \ |
| { \ |
| if ((rsize) <= _FP_W_TYPE_SIZE) \ |
| (r) = X##_f[0]; \ |
| else if ((rsize) <= 2*_FP_W_TYPE_SIZE) \ |
| { \ |
| (r) = X##_f[1]; \ |
| (r) = ((rsize) <= _FP_W_TYPE_SIZE \ |
| ? 0 \ |
| : (r) << _FP_W_TYPE_SIZE); \ |
| (r) += X##_f[0]; \ |
| } \ |
| else \ |
| { \ |
| /* I'm feeling lazy so we deal with int == 3words \ |
| (implausible) and int == 4words as a single case. */ \ |
| (r) = X##_f[3]; \ |
| (r) = ((rsize) <= _FP_W_TYPE_SIZE \ |
| ? 0 \ |
| : (r) << _FP_W_TYPE_SIZE); \ |
| (r) += X##_f[2]; \ |
| (r) = ((rsize) <= _FP_W_TYPE_SIZE \ |
| ? 0 \ |
| : (r) << _FP_W_TYPE_SIZE); \ |
| (r) += X##_f[1]; \ |
| (r) = ((rsize) <= _FP_W_TYPE_SIZE \ |
| ? 0 \ |
| : (r) << _FP_W_TYPE_SIZE); \ |
| (r) += X##_f[0]; \ |
| } \ |
| } \ |
| while (0) |
| |
| /* "No disassemble Number Five!" */ |
| /* Move an integer of size rsize into X's fractional part. We rely on |
| the _f[] array consisting of words of size _FP_W_TYPE_SIZE to avoid |
| having to mask the values we store into it. */ |
| #define _FP_FRAC_DISASSEMBLE_4(X, r, rsize) \ |
| do \ |
| { \ |
| X##_f[0] = (r); \ |
| X##_f[1] = ((rsize) <= _FP_W_TYPE_SIZE \ |
| ? 0 \ |
| : (r) >> _FP_W_TYPE_SIZE); \ |
| X##_f[2] = ((rsize) <= 2*_FP_W_TYPE_SIZE \ |
| ? 0 \ |
| : (r) >> 2*_FP_W_TYPE_SIZE); \ |
| X##_f[3] = ((rsize) <= 3*_FP_W_TYPE_SIZE \ |
| ? 0 \ |
| : (r) >> 3*_FP_W_TYPE_SIZE); \ |
| } \ |
| while (0) |
| |
| #define _FP_FRAC_COPY_4_1(D, S) \ |
| do \ |
| { \ |
| D##_f[0] = S##_f; \ |
| D##_f[1] = D##_f[2] = D##_f[3] = 0; \ |
| } \ |
| while (0) |
| |
| #define _FP_FRAC_COPY_4_2(D, S) \ |
| do \ |
| { \ |
| D##_f[0] = S##_f0; \ |
| D##_f[1] = S##_f1; \ |
| D##_f[2] = D##_f[3] = 0; \ |
| } \ |
| while (0) |
| |
| #define _FP_FRAC_COPY_4_4(D, S) _FP_FRAC_COPY_4 (D, S) |
| |
| #endif /* !SOFT_FP_OP_4_H */ |
