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Diffstat (limited to 'sysdeps/alpha/sfp-machine.h')
| -rw-r--r-- | sysdeps/alpha/sfp-machine.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/sysdeps/alpha/sfp-machine.h b/sysdeps/alpha/sfp-machine.h new file mode 100644 index 0000000000..848881ba33 --- /dev/null +++ b/sysdeps/alpha/sfp-machine.h @@ -0,0 +1,99 @@ +/* Machine-dependent software floating-point definitions. + Alpha userland IEEE 128-bit version. + Copyright (C) 2004-2018 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_TININESS_AFTER_ROUNDING 1 + +#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) + +/* We copy the libm function into libc for soft-fp. */ +extern int __feraiseexcept (int __excepts) attribute_hidden; + +#define FP_HANDLE_EXCEPTIONS \ +do { \ + if (__builtin_expect (_fex, 0)) \ + __feraiseexcept (_fex); \ +} while (0) + +#define FP_TRAPPING_EXCEPTIONS \ + ((__ieee_get_fp_control () & SWCR_ENABLE_MASK) << SWCR_ENABLE_SHIFT) |