| /* Machine-dependent software floating-point definitions. |
| Alpha userland IEEE 128-bit version. |
| Copyright (C) 2004-2014 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) and |
| David S. Miller (davem@redhat.com). |
| |
| 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. |
| |
| 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 <fenv_libc.h> |
| |
| #define _FP_W_TYPE_SIZE 64 |
| #define _FP_W_TYPE unsigned long |
| #define _FP_WS_TYPE signed long |
| #define _FP_I_TYPE long |
| |
| #define _FP_MUL_MEAT_S(R,X,Y) \ |
| _FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y) |
| #define _FP_MUL_MEAT_D(R,X,Y) \ |
| _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm) |
| #define _FP_MUL_MEAT_Q(R,X,Y) \ |
| _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm) |
| |
| #define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm) |
| #define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_1_udiv_norm(D,R,X,Y) |
| #define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_2_udiv(Q,R,X,Y) |
| |
| #define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1) |
| #define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1) |
| #define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1 |
| #define _FP_NANSIGN_S 0 |
| #define _FP_NANSIGN_D 0 |
| #define _FP_NANSIGN_Q 0 |
| |
| #define _FP_KEEPNANFRACP 1 |
| #define _FP_QNANNEGATEDP 0 |
| |
| /* Alpha Architecture Handbook, 4.7.10.4 sez that we should prefer any |
| type of NaN in Fb, then Fa. */ |
| #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ |
| do { \ |
| R##_s = Y##_s; \ |
| _FP_FRAC_COPY_##wc(R,X); \ |
| R##_c = FP_CLS_NAN; \ |
| } while (0) |
| |
| /* Rounding mode settings. */ |
| #define FP_RND_NEAREST FE_TONEAREST |
| #define FP_RND_ZERO FE_TOWARDZERO |
| #define FP_RND_PINF FE_UPWARD |
| #define FP_RND_MINF FE_DOWNWARD |
| |
| /* Obtain the current rounding mode. It's given as an argument to |
| all the Ots functions, with 4 meaning "dynamic". */ |
| #define FP_ROUNDMODE _round |
| |
| /* Exception flags. */ |
| #define FP_EX_INVALID FE_INVALID |
| #define FP_EX_OVERFLOW FE_OVERFLOW |
| #define FP_EX_UNDERFLOW FE_UNDERFLOW |
| #define FP_EX_DIVZERO FE_DIVBYZERO |
| #define FP_EX_INEXACT FE_INEXACT |
| |
| #define FP_INIT_ROUNDMODE \ |
| do { \ |
| if (__builtin_expect (_round == 4, 0)) \ |
| { \ |
| unsigned long t; \ |
| __asm__ __volatile__("excb; mf_fpcr %0" : "=f"(t)); \ |
| _round = (t >> FPCR_ROUND_SHIFT) & 3; \ |
| } \ |
| } while (0) |
| |
| #define FP_HANDLE_EXCEPTIONS \ |
| do { \ |
| if (__builtin_expect (_fex, 0)) \ |
| { \ |
| unsigned long t = __ieee_get_fp_control (); \ |
| __ieee_set_fp_control (t | _fex); \ |
| } \ |
| } while (0) |
| |
| #define FP_TRAPPING_EXCEPTIONS \ |
| ((__ieee_get_fp_control () & SWCR_ENABLE_MASK) << SWCR_ENABLE_SHIFT) |
