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1 | /* Machine description for AArch64 architecture. | |
2 | Copyright (C) 2009-2020 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))); |