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Diffstat (limited to 'sysdeps/riscv/sfp-machine.h')
| -rw-r--r-- | sysdeps/riscv/sfp-machine.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/sysdeps/riscv/sfp-machine.h b/sysdeps/riscv/sfp-machine.h new file mode 100644 index 0000000000..e3884433f3 --- /dev/null +++ b/sysdeps/riscv/sfp-machine.h @@ -0,0 +1,101 @@ +/* RISC-V softfloat definitions + Copyright (C) 2017-2018 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 + <http://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +#if __riscv_xlen == 32 + +# error "rv32i-based targets are not supported" + +#else + +# define _FP_W_TYPE_SIZE 64 +# define _FP_W_TYPE unsigned long long +# define _FP_WS_TYPE signed long long +# define _FP_I_TYPE long 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_3mul (_FP_WFRACBITS_Q, R, X, Y, umul_ppmm) + +# define _FP_MUL_MEAT_DW_S(R, X, Y) \ + _FP_MUL_MEAT_DW_1_imm (_FP_WFRACBITS_S, R, X, Y) +# define _FP_MUL_MEAT_DW_D(R, X, Y) \ + _FP_MUL_MEAT_DW_1_wide (_FP_WFRACBITS_D, R, X, Y, umul_ppmm) +# define _FP_MUL_MEAT_DW_Q(R, X, Y) \ + _FP_MUL_MEAT_DW_2_wide_3mul (_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 +# define _FP_NANFRAC_D _FP_QNANBIT_D +# define _FP_NANFRAC_Q _FP_QNANBIT_Q, 0 + +#endif + +#define _FP_NANSIGN_S 0 +#define _FP_NANSIGN_D 0 +#define _FP_NANSIGN_Q 0 + +#define _FP_KEEPNANFRACP 0 +#define _FP_QNANNEGATEDP 0 + +#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ + do { \ + R##_s = _FP_NANSIGN_##fs; \ + _FP_FRAC_SET_##wc (R, _FP_NANFRAC_##fs); \ + R##_c = FP_CLS_NAN; \ + } while (0) + +#define _FP_DECL_EX int _frm __attribute__ ((unused)); +#define FP_ROUNDMODE _frm + +#define FP_RND_NEAREST FE_TONEAREST +#define FP_RND_ZERO FE_TOWARDZERO +#define FP_RND_PINF FE_UPWARD +#define FP_RND_MINF FE_DOWNWARD + +#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 + +#ifdef __riscv_flen +# define FP_INIT_ROUNDMODE \ +do { \ + __asm__ volatile ("frrm %0" : "=r" (_frm)); \ +} while (0) + +# define FP_HANDLE_EXCEPTIONS \ +do { \ + if (__builtin_expect (_fex, 0)) \ + __asm__ volatile ("csrs fflags, %0" : : "rK" (_fex)); \ +} while (0) +#else +# define FP_INIT_ROUNDMODE _frm = FP_RND_NEAREST +#endif |