1 /* sat_arithmetic.c -- Builtins for HSAIL saturating arithmetic instructions.
2
3 Copyright (C) 2015-2020 Free Software Foundation, Inc.
4 Contributed by Pekka Jaaskelainen <pekka.jaaskelainen@parmance.com>
5 for General Processor Tech.
6
7 Permission is hereby granted, free of charge, to any person obtaining a
8 copy of this software and associated documentation files
9 (the "Software"), to deal in the Software without restriction, including
10 without limitation the rights to use, copy, modify, merge, publish,
11 distribute, sublicense, and/or sell copies of the Software, and to
12 permit persons to whom the Software is furnished to do so, subject to
13 the following conditions:
14
15 The above copyright notice and this permission notice shall be included
16 in all copies or substantial portions of the Software.
17
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
22 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 USE OR OTHER DEALINGS IN THE SOFTWARE.
25 */
26
27 #include <stdint.h>
28
29 uint8_t
__hsail_sat_add_u8(uint8_t a,uint8_t b)30 __hsail_sat_add_u8 (uint8_t a, uint8_t b)
31 {
32 uint16_t c = (uint16_t) a + (uint16_t) b;
33 if (c > UINT8_MAX)
34 return UINT8_MAX;
35 else
36 return c;
37 }
38
39 uint16_t
__hsail_sat_add_u16(uint16_t a,uint16_t b)40 __hsail_sat_add_u16 (uint16_t a, uint16_t b)
41 {
42 uint32_t c = (uint32_t) a + (uint32_t) b;
43 if (c > UINT16_MAX)
44 return UINT16_MAX;
45 else
46 return c;
47 }
48
49 uint32_t
__hsail_sat_add_u32(uint32_t a,uint32_t b)50 __hsail_sat_add_u32 (uint32_t a, uint32_t b)
51 {
52 uint32_t c;
53 if (__builtin_add_overflow (a, b, &c))
54 return UINT32_MAX;
55 return c;
56 }
57
58 uint64_t
__hsail_sat_add_u64(uint64_t a,uint64_t b)59 __hsail_sat_add_u64 (uint64_t a, uint64_t b)
60 {
61 uint64_t c;
62 if (__builtin_add_overflow (a, b, &c))
63 return UINT64_MAX;
64 return c;
65 }
66
67 int8_t
__hsail_sat_add_s8(int8_t a,int8_t b)68 __hsail_sat_add_s8 (int8_t a, int8_t b)
69 {
70 int16_t c = (int16_t) a + (int16_t) b;
71 if (c > INT8_MAX)
72 return INT8_MAX;
73 else if (c < INT8_MIN)
74 return INT8_MIN;
75 else
76 return c;
77 }
78
79 int16_t
__hsail_sat_add_s16(int16_t a,int16_t b)80 __hsail_sat_add_s16 (int16_t a, int16_t b)
81 {
82 int32_t c = (int32_t) a + (int32_t) b;
83 if (c > INT16_MAX)
84 return INT16_MAX;
85 else if (c < INT16_MIN)
86 return INT16_MIN;
87 else
88 return c;
89 }
90
91 int32_t
__hsail_sat_add_s32(int32_t a,int32_t b)92 __hsail_sat_add_s32 (int32_t a, int32_t b)
93 {
94 int32_t c;
95 if (__builtin_add_overflow (a, b, &c))
96 return b < 0 ? INT32_MIN : INT32_MAX;
97 return c;
98 }
99
100 int64_t
__hsail_sat_add_s64(int64_t a,int64_t b)101 __hsail_sat_add_s64 (int64_t a, int64_t b)
102 {
103 int64_t c;
104 if (__builtin_add_overflow (a, b, &c))
105 return b < 0 ? INT64_MIN : INT64_MAX;
106 return c;
107 }
108
109 uint8_t
__hsail_sat_sub_u8(uint8_t a,uint8_t b)110 __hsail_sat_sub_u8 (uint8_t a, uint8_t b)
111 {
112 int16_t c = (uint16_t) a - (uint16_t) b;
113 if (c < 0)
114 return 0;
115 else
116 return c;
117 }
118
119 uint16_t
__hsail_sat_sub_u16(uint16_t a,uint16_t b)120 __hsail_sat_sub_u16 (uint16_t a, uint16_t b)
121 {
122 int32_t c = (uint32_t) a - (uint32_t) b;
123 if (c < 0)
124 return 0;
125 else
126 return c;
127 }
128
129 uint32_t
__hsail_sat_sub_u32(uint32_t a,uint32_t b)130 __hsail_sat_sub_u32 (uint32_t a, uint32_t b)
131 {
132 uint32_t c;
133 if (__builtin_sub_overflow (a, b, &c))
134 return 0;
135 return c;
136 }
137
138 uint64_t
__hsail_sat_sub_u64(uint64_t a,uint64_t b)139 __hsail_sat_sub_u64 (uint64_t a, uint64_t b)
140 {
141 uint64_t c;
142 if (__builtin_sub_overflow (a, b, &c))
143 return 0;
144 return c;
145 }
146
147 int8_t
__hsail_sat_sub_s8(int8_t a,int8_t b)148 __hsail_sat_sub_s8 (int8_t a, int8_t b)
149 {
150 int16_t c = (int16_t) a - (int16_t) b;
151 if (c > INT8_MAX)
152 return INT8_MAX;
153 else if (c < INT8_MIN)
154 return INT8_MIN;
155 else
156 return c;
157 }
158
159 int16_t
__hsail_sat_sub_s16(int16_t a,int16_t b)160 __hsail_sat_sub_s16 (int16_t a, int16_t b)
161 {
162 int32_t c = (int32_t) a - (int32_t) b;
163 if (c > INT16_MAX)
164 return INT16_MAX;
165 else if (c < INT16_MIN)
166 return INT16_MIN;
167 else
168 return c;
169 }
170
171 int32_t
__hsail_sat_sub_s32(int32_t a,int32_t b)172 __hsail_sat_sub_s32 (int32_t a, int32_t b)
173 {
174 int32_t c;
175 if (__builtin_sub_overflow (a, b, &c))
176 return b < 0 ? INT32_MAX : INT32_MIN;
177 return c;
178 }
179
180 int64_t
__hsail_sat_sub_s64(int64_t a,int64_t b)181 __hsail_sat_sub_s64 (int64_t a, int64_t b)
182 {
183 int64_t c;
184 if (__builtin_sub_overflow (a, b, &c))
185 return b < 0 ? INT64_MAX : INT64_MIN;
186 return c;
187 }
188
189 uint8_t
__hsail_sat_mul_u8(uint8_t a,uint8_t b)190 __hsail_sat_mul_u8 (uint8_t a, uint8_t b)
191 {
192 uint16_t c = (uint16_t) a * (uint16_t) b;
193 if (c > UINT8_MAX)
194 return UINT8_MAX;
195 else
196 return c;
197 }
198
199 uint16_t
__hsail_sat_mul_u16(uint16_t a,uint16_t b)200 __hsail_sat_mul_u16 (uint16_t a, uint16_t b)
201 {
202 uint32_t c = (uint32_t) a * (uint32_t) b;
203 if (c > UINT16_MAX)
204 return UINT16_MAX;
205 else
206 return c;
207 }
208
209 uint32_t
__hsail_sat_mul_u32(uint32_t a,uint32_t b)210 __hsail_sat_mul_u32 (uint32_t a, uint32_t b)
211 {
212 uint32_t c;
213 if (__builtin_mul_overflow (a, b, &c))
214 return UINT32_MAX;
215 return c;
216 }
217
218 uint64_t
__hsail_sat_mul_u64(uint64_t a,uint64_t b)219 __hsail_sat_mul_u64 (uint64_t a, uint64_t b)
220 {
221 uint64_t c;
222 if (__builtin_mul_overflow (a, b, &c))
223 return UINT64_MAX;
224 return c;
225 }
226
227 int8_t
__hsail_sat_mul_s8(int8_t a,int8_t b)228 __hsail_sat_mul_s8 (int8_t a, int8_t b)
229 {
230 int16_t c = (int16_t) a * (int16_t) b;
231 if (c > INT8_MAX)
232 return INT8_MAX;
233 else if (c < INT8_MIN)
234 return INT8_MIN;
235 else
236 return c;
237 }
238
239 int16_t
__hsail_sat_mul_s16(int16_t a,int16_t b)240 __hsail_sat_mul_s16 (int16_t a, int16_t b)
241 {
242 int32_t c = (int32_t) a * (int32_t) b;
243 if (c > INT16_MAX)
244 return INT16_MAX;
245 else if (c < INT16_MIN)
246 return INT16_MIN;
247 else
248 return c;
249 }
250
251 int32_t
__hsail_sat_mul_s32(int32_t a,int32_t b)252 __hsail_sat_mul_s32 (int32_t a, int32_t b)
253 {
254 int32_t c;
255 if (__builtin_mul_overflow (a, b, &c))
256 return ((a > 0) ^ (b > 0)) ? INT32_MIN : INT32_MAX;
257 return c;
258 }
259
260 int64_t
__hsail_sat_mul_s64(int64_t a,int64_t b)261 __hsail_sat_mul_s64 (int64_t a, int64_t b)
262 {
263 int64_t c;
264 if (__builtin_mul_overflow (a, b, &c))
265 return ((a > 0) ^ (b > 0)) ? INT64_MIN : INT64_MAX;
266 return c;
267 }
268