1 /* Copyright (C) 2013-2023 Free Software Foundation, Inc.
2
3 This file is part of GCC.
4
5 GCC is free software; you can redistribute it and/or modify it under
6 the terms of the GNU General Public License as published by the Free
7 Software Foundation; either version 3, or (at your option) any later
8 version.
9
10 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
11 WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 for more details.
14
15 Under Section 7 of GPL version 3, you are granted additional
16 permissions described in the GCC Runtime Library Exception, version
17 3.1, as published by the Free Software Foundation.
18
19 You should have received a copy of the GNU General Public License and
20 a copy of the GCC Runtime Library Exception along with this program;
21 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
22 <http://www.gnu.org/licenses/>. */
23
24
25 /* This file supplies implementations for some AVR-specific builtin
26 functions so that code like the following works as expected:
27
28 int (*f (void))(_Fract)
29 {
30 return __builtin_avr_countlsr;
31 }
32
33 In this specific case, the generated code is:
34
35 f:
36 ldi r24,lo8(gs(__countlsHI))
37 ldi r25,hi8(gs(__countlsHI))
38 ret
39 */
40
41 /* Map fixed-point suffix to the corresponding fixed-point type. */
42
43 typedef short _Fract fx_hr_t;
44 typedef _Fract fx_r_t;
45 typedef long _Fract fx_lr_t;
46 typedef long long _Fract fx_llr_t;
47
48 typedef unsigned short _Fract fx_uhr_t;
49 typedef unsigned _Fract fx_ur_t;
50 typedef unsigned long _Fract fx_ulr_t;
51 typedef unsigned long long _Fract fx_ullr_t;
52
53 typedef short _Accum fx_hk_t;
54 typedef _Accum fx_k_t;
55 typedef long _Accum fx_lk_t;
56 typedef long long _Accum fx_llk_t;
57
58 typedef unsigned short _Accum fx_uhk_t;
59 typedef unsigned _Accum fx_uk_t;
60 typedef unsigned long _Accum fx_ulk_t;
61 typedef unsigned long long _Accum fx_ullk_t;
62
63 /* Map fixed-point suffix to the corresponding natural integer type. */
64
65 typedef char int_hr_t;
66 typedef int int_r_t;
67 typedef long int_lr_t;
68 typedef long long int_llr_t;
69
70 typedef unsigned char int_uhr_t;
71 typedef unsigned int int_ur_t;
72 typedef unsigned long int_ulr_t;
73 typedef unsigned long long int_ullr_t;
74
75 typedef int int_hk_t;
76 typedef long int_k_t;
77 typedef long long int_lk_t;
78 typedef long long int_llk_t;
79
80 typedef unsigned int int_uhk_t;
81 typedef unsigned long int_uk_t;
82 typedef unsigned long long int_ulk_t;
83 typedef unsigned long long int_ullk_t;
84
85 /* Map mode to the corresponding integer type. */
86
87 typedef char int_qi_t;
88 typedef int int_hi_t;
89 typedef long int_si_t;
90 typedef long long int_di_t;
91
92 typedef unsigned char uint_qi_t;
93 typedef unsigned int uint_hi_t;
94 typedef unsigned long uint_si_t;
95 typedef unsigned long long uint_di_t;
96
97
98
99 /************************************************************************/
100
101 /* Supply implementations / symbols for __builtin_roundFX ASM_NAME. */
102
103 #ifdef L_round
104
105 #define ROUND1(FX) \
106 ROUND2 (FX)
107
108 #define ROUND2(FX) \
109 extern fx_## FX ##_t __round## FX (fx_## FX ##_t x, int rpoint); \
110 \
111 fx_## FX ##_t \
112 __round## FX (fx_## FX ##_t x, int rpoint) \
113 { \
114 return __builtin_avr_round ##FX (x, rpoint); \
115 }
116
117 ROUND1(L_LABEL)
118
119 #endif /* L_round */
120
121
122
123 /*********************************************************************/
124
125 /* Implement some count-leading-redundant-sign-bits to be used with
126 coundlsFX implementation. */
127
128 #ifdef L__clrsbqi
129 extern int __clrsbqi2 (char x);
130
131 int
132 __clrsbqi2 (char x)
133 {
134 int ret;
135
136 if (x < 0)
137 x = ~x;
138
139 if (x == 0)
140 return 8 * sizeof (x) -1;
141
142 ret = __builtin_clz (x << 8);
143 return ret - 1;
144 }
145 #endif /* L__clrsbqi */
146
147
148 #ifdef L__clrsbdi
149 extern int __clrsbdi2 (long long x);
150
151 int
152 __clrsbdi2 (long long x)
153 {
154 int ret;
155
156 if (x < 0LL)
157 x = ~x;
158
159 if (x == 0LL)
160 return 8 * sizeof (x) -1;
161
162 ret = __builtin_clzll ((unsigned long long) x);
163 return ret - 1;
164 }
165 #endif /* L__clrsbdi */
166
167
168
169 /*********************************************************************/
170
171 /* Supply implementations / symbols for __builtin_avr_countlsFX. */
172
173 /* Signed */
174
175 #ifdef L_countls
176
177 #define COUNTLS1(MM) \
178 COUNTLS2 (MM)
179
180 #define COUNTLS2(MM) \
181 extern int __countls## MM ##2 (int_## MM ##_t); \
182 extern int __clrsb## MM ##2 (int_## MM ##_t); \
183 \
184 int \
185 __countls## MM ##2 (int_## MM ##_t x) \
186 { \
187 if (x == 0) \
188 return __INT8_MAX__; \
189 \
190 return __clrsb## MM ##2 (x); \
191 }
192
193 COUNTLS1(L_LABEL)
194
195 #endif /* L_countls */
196
197 /* Unsigned */
198
199 #ifdef L_countlsu
200
201 #define clz_qi2 __builtin_clz /* unused, avoid warning */
202 #define clz_hi2 __builtin_clz
203 #define clz_si2 __builtin_clzl
204 #define clz_di2 __builtin_clzll
205
206 #define COUNTLS1(MM) \
207 COUNTLS2 (MM)
208
209 #define COUNTLS2(MM) \
210 extern int __countlsu## MM ##2 (uint_## MM ##_t); \
211 \
212 int \
213 __countlsu## MM ##2 (uint_## MM ##_t x) \
214 { \
215 if (x == 0) \
216 return __INT8_MAX__; \
217 \
218 if (sizeof (x) == 1) \
219 return clz_hi2 (x << 8); \
220 else \
221 return clz_## MM ##2 (x); \
222 }
223
224 COUNTLS1(L_LABEL)
225
226 #endif /* L_countlsu */