1 /* softfp machine description for LoongArch.
2 Copyright (C) 2021-2023 Free Software Foundation, Inc.
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)));