Mercurial > repos > blastem

comparison backend_x86.c @ 690:fc04781f4d28

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Removed hardcoded assumptions in M68K core about which parts of the memory map are RAM
author Michael Pavone <pavone@retrodev.com>
date Wed, 14 Jan 2015 09:38:54 -0800
parents 30ccf56842d6
children e11e68918691
comparison
equal deleted inserted replaced
689:858e31f977ae 690:fc04781f4d28
48 code_ptr lb_jcc = NULL, ub_jcc = NULL; 48 code_ptr lb_jcc = NULL, ub_jcc = NULL;
49 uint8_t is_write = fun_type == WRITE_16 || fun_type == WRITE_8; 49 uint8_t is_write = fun_type == WRITE_16 || fun_type == WRITE_8;
50 uint8_t adr_reg = is_write ? opts->scratch2 : opts->scratch1; 50 uint8_t adr_reg = is_write ? opts->scratch2 : opts->scratch1;
51 uint16_t access_flag = is_write ? MMAP_WRITE : MMAP_READ; 51 uint16_t access_flag = is_write ? MMAP_WRITE : MMAP_READ;
52 uint8_t size = (fun_type == READ_16 || fun_type == WRITE_16) ? SZ_W : SZ_B; 52 uint8_t size = (fun_type == READ_16 || fun_type == WRITE_16) ? SZ_W : SZ_B;
53 uint32_t ram_flags_off = opts->ram_flags_off;
53 for (uint32_t chunk = 0; chunk < num_chunks; chunk++) 54 for (uint32_t chunk = 0; chunk < num_chunks; chunk++)
54 { 55 {
55 if (memmap[chunk].start > 0) { 56 if (memmap[chunk].start > 0) {
56 cmp_ir(code, memmap[chunk].start, adr_reg, opts->address_size); 57 cmp_ir(code, memmap[chunk].start, adr_reg, opts->address_size);
57 lb_jcc = code->cur + 1; 58 lb_jcc = code->cur + 1;
171 } 172 }
172 } 173 }
173 if (is_write && (memmap[chunk].flags & MMAP_CODE)) { 174 if (is_write && (memmap[chunk].flags & MMAP_CODE)) {
174 mov_rr(code, opts->scratch2, opts->scratch1, opts->address_size); 175 mov_rr(code, opts->scratch2, opts->scratch1, opts->address_size);
175 shr_ir(code, opts->ram_flags_shift, opts->scratch1, opts->address_size); 176 shr_ir(code, opts->ram_flags_shift, opts->scratch1, opts->address_size);
176 bt_rrdisp(code, opts->scratch1, opts->context_reg, opts->ram_flags_off, opts->address_size); 177 bt_rrdisp(code, opts->scratch1, opts->context_reg, ram_flags_off, opts->address_size);
178 if (memmap[chunk].mask == opts->address_mask) {
179 ram_flags_off += memmap[chunk].end - memmap[chunk].start;
180 } else {
181 ram_flags_off += memmap[chunk].mask + 1;
182 }
177 code_ptr not_code = code->cur + 1; 183 code_ptr not_code = code->cur + 1;
178 jcc(code, CC_NC, code->cur + 2); 184 jcc(code, CC_NC, code->cur + 2);
179 call(code, opts->save_context); 185 call(code, opts->save_context);
180 call_args(code, opts->handle_code_write, 2, opts->scratch2, opts->context_reg); 186 call_args(code, opts->handle_code_write, 2, opts->scratch2, opts->context_reg);
181 mov_rr(code, RAX, opts->context_reg, SZ_PTR); 187 mov_rr(code, RAX, opts->context_reg, SZ_PTR);