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comparison backend.c @ 1964:9d35ce5012a6

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Apply fixes to helper functions in backend.c from interp branch
author Michael Pavone <pavone@retrodev.com>
date Sun, 03 May 2020 23:24:03 -0700
parents 42c12d141f6e
children a7b753e260a2 45c4b74e7676
comparison
equal deleted inserted replaced
1963:495569c1dc61 1964:9d35ce5012a6
158 { 158 {
159 memmap_chunk const *chunk = find_map_chunk(address, opts, 0, NULL); 159 memmap_chunk const *chunk = find_map_chunk(address, opts, 0, NULL);
160 if (!chunk) { 160 if (!chunk) {
161 return; 161 return;
162 } 162 }
163 uint32_t offset = (address - chunk->start) & chunk->mask; 163 uint32_t offset = address & chunk->mask;
164 if (chunk->flags & MMAP_WRITE) { 164 if (chunk->flags & MMAP_WRITE) {
165 uint8_t *base; 165 uint8_t *base;
166 if (chunk->flags & MMAP_PTR_IDX) { 166 if (chunk->flags & MMAP_PTR_IDX) {
167 base = mem_pointers[chunk->ptr_index]; 167 base = mem_pointers[chunk->ptr_index];
168 } else { 168 } else {
208 } 208 }
209 } else if (chunk->flags & MMAP_ONLY_ODD) { 209 } else if (chunk->flags & MMAP_ONLY_ODD) {
210 return 0xFF; 210 return 0xFF;
211 } 211 }
212 offset /= 2; 212 offset /= 2;
213 } else if(opts->byte_swap) {
214 offset ^= 1;
213 } 215 }
214 return base[offset]; 216 return base[offset];
215 } 217 }
216 } 218 }
217 if ((!(chunk->flags & MMAP_READ) || (chunk->flags & MMAP_FUNC_NULL)) && chunk->read_8) { 219 if ((!(chunk->flags & MMAP_READ) || (chunk->flags & MMAP_FUNC_NULL)) && chunk->read_8) {
242 } 244 }
243 } else if (chunk->flags & MMAP_ONLY_ODD) { 245 } else if (chunk->flags & MMAP_ONLY_ODD) {
244 return; 246 return;
245 } 247 }
246 offset /= 2; 248 offset /= 2;
249 } else if(opts->byte_swap) {
250 offset ^= 1;
247 } 251 }
248 base[offset] = value; 252 base[offset] = value;
249 } 253 }
250 } 254 }
251 if ((!(chunk->flags & MMAP_WRITE) || (chunk->flags & MMAP_FUNC_NULL)) && chunk->write_8) { 255 if ((!(chunk->flags & MMAP_WRITE) || (chunk->flags & MMAP_FUNC_NULL)) && chunk->write_8) {