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8cd6efca5b
To enable “longlong.h” removal, add_ssaaaa and sub_ssaaaa are moved to gmp-arch.h. The generic implementation now uses a static inline. This provides better type checking than the GNU extension, which casts the asm constraint; and it also works better with clang. Most architectures use the generic implementation, with except of arc, arm, hppa, x86, m68k, powerpc, and sparc. The 32 bit architectures the compiler generates good enough code using uint64_t types, where for 64 bit architecture the patch leverages the math_u128.h definitions that uses 128-bit integers when available (all 64 bit architectures on gcc 15). The strongly typed implementation required some changes. I adjusted _FP_W_TYPE, _FP_WS_TYPE, and _FP_I_TYPE to use the same type as mp_limb_t on aarch64, powerpc64le, x86_64, and riscv64. This basically means using “long” instead of “long long.” Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
127 lines
4.0 KiB
C
127 lines
4.0 KiB
C
/* RISC-V softfloat definitions
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Copyright (C) 2017-2025 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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#include <fenv.h>
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#include <fpu_control.h>
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#if __riscv_xlen == 32
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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_udiv_norm (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
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# define _FP_NANFRAC_D _FP_QNANBIT_D, 0
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# define _FP_NANFRAC_Q _FP_QNANBIT_Q, 0, 0, 0
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#else
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# define _FP_W_TYPE_SIZE 64
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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_imm (_FP_WFRACBITS_S, R, X, Y)
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# define _FP_MUL_MEAT_D(R, X, Y) \
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_FP_MUL_MEAT_1_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_2_wide_3mul (_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_imm (_FP_WFRACBITS_S, R, X, Y)
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# define _FP_MUL_MEAT_DW_D(R, X, Y) \
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_FP_MUL_MEAT_DW_1_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_2_wide_3mul (_FP_WFRACBITS_Q, R, X, Y, umul_ppmm)
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# define _FP_DIV_MEAT_S(R, X, Y) _FP_DIV_MEAT_1_imm (S, R, X, Y, _FP_DIV_HELP_imm)
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# define _FP_DIV_MEAT_D(R, X, Y) _FP_DIV_MEAT_1_udiv_norm (D, R, X, Y)
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# define _FP_DIV_MEAT_Q(R, X, Y) _FP_DIV_MEAT_2_udiv (Q, R, X, Y)
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# define _FP_NANFRAC_S _FP_QNANBIT_S
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# define _FP_NANFRAC_D _FP_QNANBIT_D
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# define _FP_NANFRAC_Q _FP_QNANBIT_Q, 0
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#endif
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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 0
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#define _FP_QNANNEGATEDP 0
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#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \
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do { \
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R##_s = _FP_NANSIGN_##fs; \
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_FP_FRAC_SET_##wc (R, _FP_NANFRAC_##fs); \
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R##_c = FP_CLS_NAN; \
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} while (0)
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#define _FP_DECL_EX int _frm __attribute__ ((unused));
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#define FP_ROUNDMODE _frm
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#define FP_RND_NEAREST FE_TONEAREST
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#define FP_RND_ZERO FE_TOWARDZERO
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#define FP_RND_PINF FE_UPWARD
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#define FP_RND_MINF FE_DOWNWARD
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#define FP_EX_INVALID FE_INVALID
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#define FP_EX_OVERFLOW FE_OVERFLOW
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#define FP_EX_UNDERFLOW FE_UNDERFLOW
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#define FP_EX_DIVZERO FE_DIVBYZERO
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#define FP_EX_INEXACT FE_INEXACT
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#define _FP_TININESS_AFTER_ROUNDING 1
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#ifdef __riscv_flen
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# define FP_INIT_ROUNDMODE \
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do { \
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__asm__ volatile ("frrm %0" : "=r" (_frm)); \
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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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__asm__ volatile ("csrs fflags, %0" : : "rK" (_fex)); \
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} while (0)
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#else
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# define FP_INIT_ROUNDMODE _frm = FP_RND_NEAREST
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#endif
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