89 testBitfieldSizeof(void)
91 /* Although bitfields are extremely implementation dependant, these
92 assertions should hold for all implementations with storage units
93 of 8 bits or larger (nearly universal).
95 ASSERT( sizeof(size1a_bf) >= 1);
96 ASSERT( sizeof(size1b_bf) >= 1);
97 ASSERT( sizeof(size1c_bf) >= 1);
98 ASSERT( sizeof(size2a_bf) >= 2);
99 ASSERT( sizeof(size2b_bf) >= 2);
100 ASSERT( sizeof(size2c_bf) >= 2);
101 ASSERT( sizeof(size2d_bf) >= 2);
102 ASSERT( sizeof(size3a_bf) >= 2);
103 ASSERT( sizeof(size1a_bf) == sizeof(size1b_bf));
104 ASSERT( sizeof(size1a_bf) < sizeof(size2a_bf));
106 /* Some SDCC specific assertions. SDCC uses 8 bit storage units.
107 Bitfields that are less than 8 bits, but would (due to earlier
108 bitfield declarations) span a storage unit boundary are
109 realigned to the next storage unit boundary. Bitfields of
110 8 or greater bits are always aligned to start on a storage
114 ASSERT( sizeof(size1a_bf) == 1);
115 ASSERT( sizeof(size1b_bf) == 1);
116 ASSERT( sizeof(size1c_bf) == 1);
117 ASSERT( sizeof(size2a_bf) == 2);
118 ASSERT( sizeof(size2b_bf) == 2);
119 ASSERT( sizeof(size2c_bf) == 2);
120 ASSERT( sizeof(size2d_bf) == 2);
121 ASSERT( sizeof(size3a_bf) == 3);
127 testBitfieldsSingleBitLiteral(void)
140 /* make sure modulo 2 truncation works */
141 size2b_bf.b0 = 0x3fe;
142 ASSERT(size2b_bf.b0==0);
143 ASSERT(size2b_bf.b1==0);
144 ASSERT(size2b_bf.b2==0);
145 ASSERT(size2b_bf.b3==0);
146 ASSERT(size2b_bf.b4==0);
147 ASSERT(size2b_bf.b5==0);
148 ASSERT(size2b_bf.b6==0);
149 ASSERT(size2b_bf.b7==0);
150 ASSERT(size2b_bf.b8==0);
151 ASSERT(size2b_bf.b9==0);
152 size2b_bf.b0 = 0x3ff;
153 ASSERT(size2b_bf.b0==1);
154 ASSERT(size2b_bf.b1==0);
155 ASSERT(size2b_bf.b2==0);
156 ASSERT(size2b_bf.b3==0);
157 ASSERT(size2b_bf.b4==0);
158 ASSERT(size2b_bf.b5==0);
159 ASSERT(size2b_bf.b6==0);
160 ASSERT(size2b_bf.b7==0);
161 ASSERT(size2b_bf.b8==0);
162 ASSERT(size2b_bf.b9==0);
164 /* make sure both bytes work */
165 size2b_bf.b9 = 0x3ff;
166 ASSERT(size2b_bf.b0==1);
167 ASSERT(size2b_bf.b1==0);
168 ASSERT(size2b_bf.b2==0);
169 ASSERT(size2b_bf.b3==0);
170 ASSERT(size2b_bf.b4==0);
171 ASSERT(size2b_bf.b5==0);
172 ASSERT(size2b_bf.b6==0);
173 ASSERT(size2b_bf.b7==0);
174 ASSERT(size2b_bf.b8==0);
175 ASSERT(size2b_bf.b9==1);
179 testBitfieldsSingleBit(void)
181 volatile unsigned char c;
195 /* make sure modulo 2 truncation works */
198 ASSERT(size2b_bf.b0==0);
199 ASSERT(size2b_bf.b1==0);
200 ASSERT(size2b_bf.b2==0);
201 ASSERT(size2b_bf.b3==0);
202 ASSERT(size2b_bf.b4==0);
203 ASSERT(size2b_bf.b5==0);
204 ASSERT(size2b_bf.b6==0);
205 ASSERT(size2b_bf.b7==0);
206 ASSERT(size2b_bf.b8==0);
207 ASSERT(size2b_bf.b9==0);
210 ASSERT(size2b_bf.b0==1);
211 ASSERT(size2b_bf.b1==0);
212 ASSERT(size2b_bf.b2==0);
213 ASSERT(size2b_bf.b3==0);
214 ASSERT(size2b_bf.b4==0);
215 ASSERT(size2b_bf.b5==0);
216 ASSERT(size2b_bf.b6==0);
217 ASSERT(size2b_bf.b7==0);
218 ASSERT(size2b_bf.b8==0);
219 ASSERT(size2b_bf.b9==0);
221 /* make sure both bytes work */
223 ASSERT(size2b_bf.b0==1);
224 ASSERT(size2b_bf.b1==0);
225 ASSERT(size2b_bf.b2==0);
226 ASSERT(size2b_bf.b3==0);
227 ASSERT(size2b_bf.b4==0);
228 ASSERT(size2b_bf.b5==0);
229 ASSERT(size2b_bf.b6==0);
230 ASSERT(size2b_bf.b7==0);
231 ASSERT(size2b_bf.b8==0);
232 ASSERT(size2b_bf.b9==1);
236 testBitfieldsMultibitLiteral(void)
238 size2c_bf.b0 = 0xff; /* should truncate to 0x0f */
240 ASSERT(size2c_bf.b0==0x0f);
241 ASSERT(size2c_bf.b1==0);
243 size2c_bf.b1 = 0xff; /* should truncate to 0x1f */
245 ASSERT(size2c_bf.b0==0);
246 ASSERT(size2c_bf.b1==0x1f);
248 size2d_bf.b0 = 0xffff; /* should truncate to 0x0fff */
250 ASSERT(size2d_bf.b0==0x0fff);
251 ASSERT(size2d_bf.b1==0);
253 size2d_bf.b1 = 0xffff; /* should truncate to 0x07 */
255 ASSERT(size2d_bf.b0==0);
256 ASSERT(size2d_bf.b1==0x07);
258 size2d_bf.b0 = 0x0321;
260 ASSERT(size2d_bf.b0==0x0321);
261 ASSERT(size2d_bf.b1==1);
263 size2d_bf.b0 = 0x0a46;
265 ASSERT(size2d_bf.b0==0x0a46);
266 ASSERT(size2d_bf.b1==5);
270 testBitfieldsMultibit(void)
272 volatile int allones = 0xffff;
273 volatile int zero = 0;
276 size2c_bf.b0 = allones; /* should truncate to 0x0f */
278 ASSERT(size2c_bf.b0==0x0f);
279 ASSERT(size2c_bf.b1==0);
281 size2c_bf.b1 = allones; /* should truncate to 0x1f */
283 ASSERT(size2c_bf.b0==0);
284 ASSERT(size2c_bf.b1==0x1f);
286 size2d_bf.b0 = allones; /* should truncate to 0x0fff */
288 ASSERT(size2d_bf.b0==0x0fff);
289 ASSERT(size2d_bf.b1==0);
291 size2d_bf.b1 = allones; /* should truncate to 0x07 */
293 ASSERT(size2d_bf.b0==0);
294 ASSERT(size2d_bf.b1==0x07);
300 ASSERT(size2d_bf.b0==0x0321);
301 ASSERT(size2d_bf.b1==1);
307 ASSERT(size2d_bf.b0==0x0a46);
308 ASSERT(size2d_bf.b1==5);
317 ASSERT(*(char *)(&c_bitfield) == (2 + (3<<3)) );
319 i_bitfield.i0_7 = 23;
320 i_bitfield.i7_9 = 234;
321 ASSERT(*(int *)(&i_bitfield) == (23 + (234<<7)) );
323 l_bitfield.l0_7 = 23;
324 l_bitfield.l7_10 = 234;
325 l_bitfield.l17_15 = 2345;
326 ASSERT(*(long *)(&l_bitfield) == (23 + (234<<7) + (2345<<17)) );