/* Machine-dependent software floating-point definitions. Alpha userland IEEE 128-bit version. Copyright (C) 2004-2024 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. 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 . */ #include #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)