1 /* Machine description for AArch64 architecture. 2 Copyright (C) 2009-2022 Free Software Foundation, Inc. 3 Contributed by ARM Ltd. 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify it under 8 the terms of the GNU General Public License as published by the Free 9 Software Foundation; either version 3, or (at your option) any later 10 version. 11 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 for more details. 16 17 Under Section 7 of GPL version 3, you are granted additional 18 permissions described in the GCC Runtime Library Exception, version 19 3.1, as published by the Free Software Foundation. 20 21 You should have received a copy of the GNU General Public License and 22 a copy of the GCC Runtime Library Exception along with this program; 23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24 <http://www.gnu.org/licenses/>. */ 25 26 #define _FP_W_TYPE_SIZE 64 27 #define _FP_W_TYPE unsigned long long 28 #define _FP_WS_TYPE signed long long 29 #define _FP_I_TYPE long long 30 31 typedef int TItype __attribute__ ((mode (TI))); 32 typedef unsigned int UTItype __attribute__ ((mode (TI))); 33 #define TI_BITS (__CHAR_BIT__ * (int)sizeof(TItype)) 34 35 /* The type of the result of a floating point comparison. This must 36 match __libgcc_cmp_return__ in GCC for the target. */ 37 typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__))); 38 #define CMPtype __gcc_CMPtype 39 40 #define _FP_MUL_MEAT_Q(R,X,Y) \ 41 _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm) 42 43 #define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_2_udiv(Q,R,X,Y) 44 45 #define _FP_NANFRAC_H ((_FP_QNANBIT_H << 1) - 1) 46 #define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1) 47 #define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1) 48 #define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1 49 #define _FP_NANSIGN_H 0 50 #define _FP_NANSIGN_S 0 51 #define _FP_NANSIGN_D 0 52 #define _FP_NANSIGN_Q 0 53 54 #define _FP_KEEPNANFRACP 1 55 #define _FP_QNANNEGATEDP 0 56 57 /* This appears to be in line with the VFP conventions in the v7-a 58 ARM-ARM. Need to check with the v8 version. */ 59 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ 60 do { \ 61 if ((_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs) \ 62 && !(_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs)) \ 63 { \ 64 R##_s = Y##_s; \ 65 _FP_FRAC_COPY_##wc(R,Y); \ 66 } \ 67 else \ 68 { \ 69 R##_s = X##_s; \ 70 _FP_FRAC_COPY_##wc(R,X); \ 71 } \ 72 R##_c = FP_CLS_NAN; \ 73 } while (0) 74 75 #define FP_EX_INVALID 0x01 76 #define FP_EX_DIVZERO 0x02 77 #define FP_EX_OVERFLOW 0x04 78 #define FP_EX_UNDERFLOW 0x08 79 #define FP_EX_INEXACT 0x10 80 #define FP_EX_SHIFT 8 81 #define FP_EX_ALL \ 82 (FP_EX_INVALID | FP_EX_DIVZERO | FP_EX_OVERFLOW | FP_EX_UNDERFLOW \ 83 | FP_EX_INEXACT) 84 85 #define _FP_TININESS_AFTER_ROUNDING 0 86 87 void __sfp_handle_exceptions (int); 88 89 #define FP_HANDLE_EXCEPTIONS \ 90 do { \ 91 if (__builtin_expect (_fex, 0)) \ 92 __sfp_handle_exceptions (_fex); \ 93 } while (0) 94 95 #define FP_TRAPPING_EXCEPTIONS ((_fpcr >> FP_EX_SHIFT) & FP_EX_ALL) 96 97 #define FP_RND_NEAREST 0x000000 98 #define FP_RND_PINF 0x400000 99 #define FP_RND_MINF 0x800000 100 #define FP_RND_ZERO 0xc00000 101 #define FP_RND_MASK 0xc00000 102 103 #define _FP_DECL_EX \ 104 unsigned long int _fpcr __attribute__ ((unused)) = FP_RND_NEAREST 105 106 #define FP_INIT_ROUNDMODE \ 107 do { \ 108 __asm__ __volatile__ ("mrs %0, fpcr" \ 109 : "=r" (_fpcr)); \ 110 } while (0) 111 112 #define FP_ROUNDMODE (_fpcr & FP_RND_MASK) 113 114 #define __LITTLE_ENDIAN 1234 115 #define __BIG_ENDIAN 4321 116 117 #if defined __AARCH64EB__ 118 # define __BYTE_ORDER __BIG_ENDIAN 119 #else 120 # define __BYTE_ORDER __LITTLE_ENDIAN 121 #endif 122 123 124 /* Define ALIASNAME as a strong alias for NAME. */ 125 # define strong_alias(name, aliasname) _strong_alias(name, aliasname) 126 # define _strong_alias(name, aliasname) \ 127 extern __typeof (name) aliasname __attribute__ ((alias (#name))); 128