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99dee823 | 1 | /* Copyright (C) 1988-2021 Free Software Foundation, Inc. |
2bf6d935 ML |
2 | |
3 | This file is part of GCC. | |
4 | ||
5 | GCC is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 3, or (at your option) | |
8 | any later version. | |
9 | ||
10 | GCC is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with GCC; see the file COPYING3. If not see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #ifndef GCC_I386_FEATURES_H | |
20 | #define GCC_I386_FEATURES_H | |
21 | ||
22 | enum xlogue_stub { | |
23 | XLOGUE_STUB_SAVE, | |
24 | XLOGUE_STUB_RESTORE, | |
25 | XLOGUE_STUB_RESTORE_TAIL, | |
26 | XLOGUE_STUB_SAVE_HFP, | |
27 | XLOGUE_STUB_RESTORE_HFP, | |
28 | XLOGUE_STUB_RESTORE_HFP_TAIL, | |
29 | ||
30 | XLOGUE_STUB_COUNT | |
31 | }; | |
32 | ||
33 | enum xlogue_stub_sets { | |
34 | XLOGUE_SET_ALIGNED, | |
35 | XLOGUE_SET_ALIGNED_PLUS_8, | |
36 | XLOGUE_SET_HFP_ALIGNED_OR_REALIGN, | |
37 | XLOGUE_SET_HFP_ALIGNED_PLUS_8, | |
38 | ||
39 | XLOGUE_SET_COUNT | |
40 | }; | |
41 | ||
42 | /* Register save/restore layout used by out-of-line stubs. */ | |
43 | class xlogue_layout { | |
44 | public: | |
45 | struct reginfo | |
46 | { | |
47 | unsigned regno; | |
48 | HOST_WIDE_INT offset; /* Offset used by stub base pointer (rax or | |
49 | rsi) to where each register is stored. */ | |
50 | }; | |
51 | ||
52 | unsigned get_nregs () const {return m_nregs;} | |
53 | HOST_WIDE_INT get_stack_align_off_in () const {return m_stack_align_off_in;} | |
54 | ||
55 | const reginfo &get_reginfo (unsigned reg) const | |
56 | { | |
57 | gcc_assert (reg < m_nregs); | |
58 | return m_regs[reg]; | |
59 | } | |
60 | ||
61 | static const char *get_stub_name (enum xlogue_stub stub, | |
62 | unsigned n_extra_args); | |
63 | ||
64 | /* Returns an rtx for the stub's symbol based upon | |
65 | 1.) the specified stub (save, restore or restore_ret) and | |
66 | 2.) the value of cfun->machine->call_ms2sysv_extra_regs and | |
67 | 3.) rather or not stack alignment is being performed. */ | |
68 | static rtx get_stub_rtx (enum xlogue_stub stub); | |
69 | ||
70 | /* Returns the amount of stack space (including padding) that the stub | |
71 | needs to store registers based upon data in the machine_function. */ | |
72 | HOST_WIDE_INT get_stack_space_used () const | |
73 | { | |
74 | const struct machine_function *m = cfun->machine; | |
75 | unsigned last_reg = m->call_ms2sysv_extra_regs + MIN_REGS - 1; | |
76 | ||
77 | gcc_assert (m->call_ms2sysv_extra_regs <= MAX_EXTRA_REGS); | |
78 | return m_regs[last_reg].offset + STUB_INDEX_OFFSET; | |
79 | } | |
80 | ||
81 | /* Returns the offset for the base pointer used by the stub. */ | |
82 | HOST_WIDE_INT get_stub_ptr_offset () const | |
83 | { | |
84 | return STUB_INDEX_OFFSET + m_stack_align_off_in; | |
85 | } | |
86 | ||
99b1c316 | 87 | static const class xlogue_layout &get_instance (); |
2bf6d935 ML |
88 | static unsigned count_stub_managed_regs (); |
89 | static bool is_stub_managed_reg (unsigned regno, unsigned count); | |
90 | ||
91 | static const HOST_WIDE_INT STUB_INDEX_OFFSET = 0x70; | |
92 | static const unsigned MIN_REGS = NUM_X86_64_MS_CLOBBERED_REGS; | |
93 | static const unsigned MAX_REGS = 18; | |
94 | static const unsigned MAX_EXTRA_REGS = MAX_REGS - MIN_REGS; | |
95 | static const unsigned VARIANT_COUNT = MAX_EXTRA_REGS + 1; | |
96 | static const unsigned STUB_NAME_MAX_LEN = 20; | |
97 | static const char * const STUB_BASE_NAMES[XLOGUE_STUB_COUNT]; | |
98 | static const unsigned REG_ORDER[MAX_REGS]; | |
99 | static const unsigned REG_ORDER_REALIGN[MAX_REGS]; | |
100 | ||
101 | private: | |
102 | xlogue_layout (); | |
103 | xlogue_layout (HOST_WIDE_INT stack_align_off_in, bool hfp); | |
104 | xlogue_layout (const xlogue_layout &); | |
105 | ||
106 | /* True if hard frame pointer is used. */ | |
107 | bool m_hfp; | |
108 | ||
109 | /* Max number of register this layout manages. */ | |
110 | unsigned m_nregs; | |
111 | ||
112 | /* Incoming offset from 16-byte alignment. */ | |
113 | HOST_WIDE_INT m_stack_align_off_in; | |
114 | ||
115 | /* Register order and offsets. */ | |
116 | struct reginfo m_regs[MAX_REGS]; | |
117 | ||
118 | /* Lazy-inited cache of symbol names for stubs. */ | |
119 | static char s_stub_names[2][XLOGUE_STUB_COUNT][VARIANT_COUNT] | |
120 | [STUB_NAME_MAX_LEN]; | |
121 | ||
122 | static const xlogue_layout s_instances[XLOGUE_SET_COUNT]; | |
123 | }; | |
124 | ||
125 | namespace { | |
126 | ||
127 | class scalar_chain | |
128 | { | |
129 | public: | |
93cf5515 | 130 | scalar_chain (enum machine_mode, enum machine_mode); |
2bf6d935 ML |
131 | virtual ~scalar_chain (); |
132 | ||
133 | static unsigned max_id; | |
134 | ||
93cf5515 RB |
135 | /* Scalar mode. */ |
136 | enum machine_mode smode; | |
137 | /* Vector mode. */ | |
138 | enum machine_mode vmode; | |
139 | ||
2bf6d935 ML |
140 | /* ID of a chain. */ |
141 | unsigned int chain_id; | |
142 | /* A queue of instructions to be included into a chain. */ | |
143 | bitmap queue; | |
144 | /* Instructions included into a chain. */ | |
145 | bitmap insns; | |
146 | /* All registers defined by a chain. */ | |
147 | bitmap defs; | |
148 | /* Registers used in both vector and sclar modes. */ | |
149 | bitmap defs_conv; | |
150 | ||
151 | void build (bitmap candidates, unsigned insn_uid); | |
152 | virtual int compute_convert_gain () = 0; | |
153 | int convert (); | |
154 | ||
155 | protected: | |
156 | void add_to_queue (unsigned insn_uid); | |
157 | void emit_conversion_insns (rtx insns, rtx_insn *pos); | |
158 | ||
159 | private: | |
160 | void add_insn (bitmap candidates, unsigned insn_uid); | |
161 | void analyze_register_chain (bitmap candidates, df_ref ref); | |
162 | virtual void mark_dual_mode_def (df_ref def) = 0; | |
163 | virtual void convert_insn (rtx_insn *insn) = 0; | |
164 | virtual void convert_registers () = 0; | |
165 | }; | |
166 | ||
93cf5515 | 167 | class general_scalar_chain : public scalar_chain |
2bf6d935 ML |
168 | { |
169 | public: | |
b5a6addb RB |
170 | general_scalar_chain (enum machine_mode smode_, enum machine_mode vmode_); |
171 | ~general_scalar_chain (); | |
2bf6d935 ML |
172 | int compute_convert_gain (); |
173 | private: | |
48a31a09 | 174 | hash_map<rtx, rtx> defs_map; |
b5a6addb RB |
175 | bitmap insns_conv; |
176 | unsigned n_sse_to_integer; | |
177 | unsigned n_integer_to_sse; | |
2bf6d935 | 178 | void mark_dual_mode_def (df_ref def); |
2bf6d935 ML |
179 | void convert_insn (rtx_insn *insn); |
180 | void convert_op (rtx *op, rtx_insn *insn); | |
48a31a09 | 181 | void convert_reg (rtx_insn *insn, rtx dst, rtx src); |
b5a6addb | 182 | void make_vector_copies (rtx_insn *, rtx); |
2bf6d935 ML |
183 | void convert_registers (); |
184 | int vector_const_cost (rtx exp); | |
185 | }; | |
186 | ||
187 | class timode_scalar_chain : public scalar_chain | |
188 | { | |
189 | public: | |
93cf5515 RB |
190 | timode_scalar_chain () : scalar_chain (TImode, V1TImode) {} |
191 | ||
2bf6d935 ML |
192 | /* Convert from TImode to V1TImode is always faster. */ |
193 | int compute_convert_gain () { return 1; } | |
194 | ||
195 | private: | |
196 | void mark_dual_mode_def (df_ref def); | |
197 | void fix_debug_reg_uses (rtx reg); | |
198 | void convert_insn (rtx_insn *insn); | |
199 | /* We don't convert registers to difference size. */ | |
200 | void convert_registers () {} | |
201 | }; | |
202 | ||
203 | } // anon namespace | |
204 | ||
205 | bool ix86_save_reg (unsigned int regno, bool maybe_eh_return, bool ignore_outlined); | |
206 | int ix86_compare_version_priority (tree decl1, tree decl2); | |
207 | tree ix86_generate_version_dispatcher_body (void *node_p); | |
208 | tree ix86_get_function_versions_dispatcher (void *decl); | |
209 | tree ix86_mangle_decl_assembler_name (tree decl, tree id); | |
210 | ||
211 | ||
212 | #endif /* GCC_I386_FEATURES_H */ |