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111 lines
3.5 KiB
C
111 lines
3.5 KiB
C
/* OpenRISC softfloat definitions.
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Copyright (C) 2022-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<https://www.gnu.org/licenses/>. */
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#define _FP_W_TYPE_SIZE 32
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#define _FP_W_TYPE unsigned long
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#define _FP_WS_TYPE signed long
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#define _FP_I_TYPE long
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#define _FP_MUL_MEAT_S(R,X,Y) \
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_FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
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#define _FP_MUL_MEAT_D(R,X,Y) \
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_FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
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#define _FP_MUL_MEAT_Q(R,X,Y) \
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_FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
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#define _FP_MUL_MEAT_DW_S(R,X,Y) \
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_FP_MUL_MEAT_DW_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
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#define _FP_MUL_MEAT_DW_D(R,X,Y) \
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_FP_MUL_MEAT_DW_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
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#define _FP_MUL_MEAT_DW_Q(R,X,Y) \
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_FP_MUL_MEAT_DW_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
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#define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_loop(S,R,X,Y)
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#define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_2_udiv(D,R,X,Y)
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#define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_4_udiv(Q,R,X,Y)
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#define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1)
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#define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1), -1
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#define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1
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#define _FP_NANSIGN_S 0
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#define _FP_NANSIGN_D 0
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#define _FP_NANSIGN_Q 0
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#define _FP_KEEPNANFRACP 1
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#define _FP_QNANNEGATEDP 0
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/* Someone please check this. */
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#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \
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do { \
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if ((_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs) \
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&& !(_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs)) \
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{ \
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R##_s = Y##_s; \
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_FP_FRAC_COPY_##wc(R,Y); \
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} \
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else \
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{ \
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R##_s = X##_s; \
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_FP_FRAC_COPY_##wc(R,X); \
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} \
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R##_c = FP_CLS_NAN; \
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} while (0)
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/* Handle getting and setting rounding mode for soft fp operations. */
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#define FP_RND_NEAREST (0x0 << 1)
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#define FP_RND_ZERO (0x1 << 1)
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#define FP_RND_PINF (0x2 << 1)
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#define FP_RND_MINF (0x3 << 1)
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#define FP_RND_MASK (0x3 << 1)
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#define FP_EX_OVERFLOW (1 << 3)
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#define FP_EX_UNDERFLOW (1 << 4)
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#define FP_EX_INEXACT (1 << 8)
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#define FP_EX_INVALID (1 << 9)
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#define FP_EX_DIVZERO (1 << 11)
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#define FP_EX_ALL \
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(FP_EX_INVALID | FP_EX_DIVZERO | FP_EX_OVERFLOW | FP_EX_UNDERFLOW \
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| FP_EX_INEXACT)
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#define _FP_DECL_EX \
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unsigned int _fpcsr __attribute__ ((unused)) = FP_RND_NEAREST
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#define FP_ROUNDMODE (_fpcsr & FP_RND_MASK)
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#ifdef __or1k_hard_float__
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#define FP_INIT_ROUNDMODE \
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do { \
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__asm__ volatile ("l.mfspr %0,r0,20" : "=r" (_fpcsr)); \
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} while (0)
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#define FP_HANDLE_EXCEPTIONS \
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do { \
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if (__builtin_expect (_fex, 0)) \
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{ \
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_fpcsr &= ~FP_EX_ALL; \
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_fpcsr |= _fex; \
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__asm__ volatile ("l.mtspr r0,%0,20" : : "r" (_fpcsr)); \
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} \
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} while (0)
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#endif /* __or1k_hard_float__ */
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#define _FP_TININESS_AFTER_ROUNDING 0
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