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bf291a43 | 1 | /* softfp machine description for LoongArch. |
83ffe9cd | 2 | Copyright (C) 2021-2023 Free Software Foundation, Inc. |
bf291a43 | 3 | |
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify it under | |
7 | the terms of the GNU General Public License as published by the Free | |
8 | Software Foundation; either version 3, or (at your option) any later | |
9 | version. | |
10 | ||
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
15 | ||
16 | Under Section 7 of GPL version 3, you are granted additional | |
17 | permissions described in the GCC Runtime Library Exception, version | |
18 | 3.1, as published by the Free Software Foundation. | |
19 | ||
20 | You should have received a copy of the GNU General Public License and | |
21 | a copy of the GCC Runtime Library Exception along with this program; | |
22 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | <http://www.gnu.org/licenses/>. */ | |
24 | ||
25 | #ifdef __loongarch64 | |
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 | #define _FP_MUL_MEAT_S(R, X, Y) \ | |
36 | _FP_MUL_MEAT_1_wide (_FP_WFRACBITS_S, R, X, Y, umul_ppmm) | |
37 | #define _FP_MUL_MEAT_D(R, X, Y) \ | |
38 | _FP_MUL_MEAT_1_wide (_FP_WFRACBITS_D, R, X, Y, umul_ppmm) | |
39 | #define _FP_MUL_MEAT_Q(R, X, Y) \ | |
40 | _FP_MUL_MEAT_2_wide (_FP_WFRACBITS_Q, R, X, Y, umul_ppmm) | |
41 | ||
42 | #define _FP_DIV_MEAT_S(R, X, Y) _FP_DIV_MEAT_1_udiv_norm (S, R, X, Y) | |
43 | #define _FP_DIV_MEAT_D(R, X, Y) _FP_DIV_MEAT_1_udiv_norm (D, R, X, Y) | |
44 | #define _FP_DIV_MEAT_Q(R, X, Y) _FP_DIV_MEAT_2_udiv (Q, R, X, Y) | |
45 | ||
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 | #else | |
50 | #define _FP_W_TYPE_SIZE 32 | |
51 | #define _FP_W_TYPE unsigned int | |
52 | #define _FP_WS_TYPE signed int | |
53 | #define _FP_I_TYPE int | |
54 | ||
55 | #define _FP_MUL_MEAT_S(R, X, Y) \ | |
56 | _FP_MUL_MEAT_1_wide (_FP_WFRACBITS_S, R, X, Y, umul_ppmm) | |
57 | #define _FP_MUL_MEAT_D(R, X, Y) \ | |
58 | _FP_MUL_MEAT_2_wide (_FP_WFRACBITS_D, R, X, Y, umul_ppmm) | |
59 | #define _FP_MUL_MEAT_Q(R, X, Y) \ | |
60 | _FP_MUL_MEAT_4_wide (_FP_WFRACBITS_Q, R, X, Y, umul_ppmm) | |
61 | ||
62 | #define _FP_DIV_MEAT_S(R, X, Y) _FP_DIV_MEAT_1_udiv_norm (S, R, X, Y) | |
63 | #define _FP_DIV_MEAT_D(R, X, Y) _FP_DIV_MEAT_2_udiv (D, R, X, Y) | |
64 | #define _FP_DIV_MEAT_Q(R, X, Y) _FP_DIV_MEAT_4_udiv (Q, R, X, Y) | |
65 | ||
66 | #define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1) | |
67 | #define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1), -1 | |
68 | #define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1 | |
69 | #endif | |
70 | ||
71 | /* The type of the result of a floating point comparison. This must | |
72 | match __libgcc_cmp_return__ in GCC for the target. */ | |
73 | typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__))); | |
74 | #define CMPtype __gcc_CMPtype | |
75 | ||
76 | #define _FP_NANSIGN_S 0 | |
77 | #define _FP_NANSIGN_D 0 | |
78 | #define _FP_NANSIGN_Q 0 | |
79 | ||
80 | #define _FP_KEEPNANFRACP 1 | |
81 | #define _FP_QNANNEGATEDP 0 | |
82 | ||
83 | /* NaN payloads should be preserved for NAN2008. */ | |
84 | #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ | |
85 | do \ | |
86 | { \ | |
87 | R##_s = X##_s; \ | |
88 | _FP_FRAC_COPY_##wc (R, X); \ | |
89 | R##_c = FP_CLS_NAN; \ | |
90 | } \ | |
91 | while (0) | |
92 | ||
93 | #ifdef __loongarch_hard_float | |
94 | #define FP_EX_INVALID 0x100000 | |
95 | #define FP_EX_DIVZERO 0x080000 | |
96 | #define FP_EX_OVERFLOW 0x040000 | |
97 | #define FP_EX_UNDERFLOW 0x020000 | |
98 | #define FP_EX_INEXACT 0x010000 | |
99 | #define FP_EX_ALL \ | |
100 | (FP_EX_INVALID | FP_EX_DIVZERO | FP_EX_OVERFLOW | FP_EX_UNDERFLOW \ | |
101 | | FP_EX_INEXACT) | |
102 | ||
103 | #define FP_EX_ENABLE_SHIFT 16 | |
104 | #define FP_EX_CAUSE_SHIFT 8 | |
105 | ||
106 | #define FP_RND_NEAREST 0x000 | |
107 | #define FP_RND_ZERO 0x100 | |
108 | #define FP_RND_PINF 0x200 | |
109 | #define FP_RND_MINF 0x300 | |
110 | #define FP_RND_MASK 0x300 | |
111 | ||
112 | #define _FP_DECL_EX \ | |
113 | unsigned long int _fcsr __attribute__ ((unused)) = FP_RND_NEAREST | |
114 | ||
115 | #define FP_INIT_ROUNDMODE \ | |
116 | do \ | |
117 | { \ | |
118 | _fcsr = __builtin_loongarch_movfcsr2gr (0); \ | |
119 | } \ | |
120 | while (0) | |
121 | ||
122 | #define FP_ROUNDMODE (_fcsr & FP_RND_MASK) | |
123 | ||
124 | #define FP_TRAPPING_EXCEPTIONS ((_fcsr << FP_EX_ENABLE_SHIFT) & FP_EX_ALL) | |
125 | ||
126 | #define FP_HANDLE_EXCEPTIONS \ | |
127 | do \ | |
128 | { \ | |
129 | _fcsr &= ~(FP_EX_ALL << FP_EX_CAUSE_SHIFT); \ | |
130 | _fcsr |= _fex | (_fex << FP_EX_CAUSE_SHIFT); \ | |
131 | __builtin_loongarch_movgr2fcsr (0, _fcsr); \ | |
132 | } \ | |
133 | while (0) | |
134 | ||
135 | #else | |
136 | #define FP_EX_INVALID (1 << 4) | |
137 | #define FP_EX_DIVZERO (1 << 3) | |
138 | #define FP_EX_OVERFLOW (1 << 2) | |
139 | #define FP_EX_UNDERFLOW (1 << 1) | |
140 | #define FP_EX_INEXACT (1 << 0) | |
141 | #endif | |
142 | ||
143 | #define _FP_TININESS_AFTER_ROUNDING 1 | |
144 | ||
145 | #define __LITTLE_ENDIAN 1234 | |
146 | ||
147 | #define __BYTE_ORDER __LITTLE_ENDIAN | |
148 | ||
149 | /* Define ALIASNAME as a strong alias for NAME. */ | |
150 | #define strong_alias(name, aliasname) _strong_alias (name, aliasname) | |
151 | #define _strong_alias(name, aliasname) \ | |
152 | extern __typeof (name) aliasname __attribute__ ((alias (#name))); |