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comparison m68k_core_x86.c @ 1375:b68732dcbf00

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Avoid splitting m68k_check_cycles_int_latch code across memory chunks since it expects a byte-sized jump offset. Avoid an unnecessary m68k_check_cycles_int_latch for register to register moves
author Michael Pavone <pavone@retrodev.com>
date Fri, 26 May 2017 19:18:19 -0700
parents eaca4443e831
children 747c779fc137
comparison
equal deleted inserted replaced
1374:8f404b1fa572 1375:b68732dcbf00
351 } 351 }
352 352
353 void m68k_check_cycles_int_latch(m68k_options *opts) 353 void m68k_check_cycles_int_latch(m68k_options *opts)
354 { 354 {
355 code_info *code = &opts->gen.code; 355 code_info *code = &opts->gen.code;
356 check_alloc_code(code, 3*MAX_INST_LEN);
356 uint8_t cc; 357 uint8_t cc;
357 if (opts->gen.limit < 0) { 358 if (opts->gen.limit < 0) {
358 cmp_ir(code, 1, opts->gen.cycles, SZ_D); 359 cmp_ir(code, 1, opts->gen.cycles, SZ_D);
359 cc = CC_NS; 360 cc = CC_NS;
360 } else { 361 } else {
726 m68k_write_size(opts, inst->extra.size, inst->dst.addr_mode == MODE_AREG_PREDEC); 727 m68k_write_size(opts, inst->extra.size, inst->dst.addr_mode == MODE_AREG_PREDEC);
727 if (inst->dst.addr_mode == MODE_AREG_POSTINC) { 728 if (inst->dst.addr_mode == MODE_AREG_POSTINC) {
728 inc_amount = inst->extra.size == OPSIZE_WORD ? 2 : (inst->extra.size == OPSIZE_LONG ? 4 : (inst->dst.params.regs.pri == 7 ? 2 : 1)); 729 inc_amount = inst->extra.size == OPSIZE_WORD ? 2 : (inst->extra.size == OPSIZE_LONG ? 4 : (inst->dst.params.regs.pri == 7 ? 2 : 1));
729 addi_areg(opts, inc_amount, inst->dst.params.regs.pri); 730 addi_areg(opts, inc_amount, inst->dst.params.regs.pri);
730 } 731 }
731 } else { 732 } else if (needs_int_latch) {
732 m68k_check_cycles_int_latch(opts); 733 m68k_check_cycles_int_latch(opts);
733 } 734 }
734 735
735 //add cycles for prefetch 736 //add cycles for prefetch
736 cycles(&opts->gen, BUS); 737 cycles(&opts->gen, BUS);