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comparison m68k_core_x86.c @ 584:b6713c1b6f55

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Combine andi ccr/sr and ori ccr/sr.
author Michael Pavone <pavone@retrodev.com>
date Fri, 07 Mar 2014 19:35:13 -0800
parents 819921b76b4b
children 82aadd5d103a
comparison
equal deleted inserted replaced
583:819921b76b4b 584:b6713c1b6f55
1990 call(code, (code_ptr)print_regs_exit); 1990 call(code, (code_ptr)print_regs_exit);
1991 } 1991 }
1992 1992
1993 #define BIT_SUPERVISOR 5 1993 #define BIT_SUPERVISOR 5
1994 1994
1995 void translate_m68k_andi_ccr_sr(m68k_options *opts, m68kinst *inst) 1995 void translate_m68k_andi_ori_ccr_sr(m68k_options *opts, m68kinst *inst)
1996 { 1996 {
1997 code_info *code = &opts->gen.code; 1997 code_info *code = &opts->gen.code;
1998 cycles(&opts->gen, 20); 1998 cycles(&opts->gen, 20);
1999 //TODO: If ANDI to SR, trap if not in supervisor mode 1999 //TODO: If ANDI to SR, trap if not in supervisor mode
2000 uint32_t flag_mask = 0; 2000 uint32_t flag_mask = 0;
2001 if (!(inst->src.params.immed & 0x1)) { 2001 uint32_t base_flag = inst->op == M68K_ANDI_SR || inst->op == M68K_ANDI_CCR ? X0 : X1;
2002 flag_mask |= C0; 2002 for (int i = 0; i < 5; i++)
2003 } 2003 {
2004 if (!(inst->src.params.immed & 0x2)) { 2004 if ((base_flag == X0) ^ (inst->src.params.immed & 1 << i) > 0)
2005 flag_mask |= V0; 2005 {
2006 } 2006 flag_mask |= base_flag << ((4 - i) * 3);
2007 if (!(inst->src.params.immed & 0x4)) { 2007 }
2008 flag_mask |= Z0;
2009 }
2010 if (!(inst->src.params.immed & 0x8)) {
2011 flag_mask |= N0;
2012 }
2013 if (!(inst->src.params.immed & 0x10)) {
2014 flag_mask |= X0;
2015 } 2008 }
2016 update_flags(opts, flag_mask); 2009 update_flags(opts, flag_mask);
2017 if (inst->op == M68K_ANDI_SR) { 2010 if (inst->op == M68K_ANDI_SR || inst->op == M68K_ORI_SR) {
2018 and_irdisp(code, inst->src.params.immed >> 8, opts->gen.context_reg, offsetof(m68k_context, status), SZ_B); 2011 if (inst->op == M68K_ANDI_SR) {
2019 if (!((inst->src.params.immed >> 8) & (1 << BIT_SUPERVISOR))) { 2012 and_irdisp(code, inst->src.params.immed >> 8, opts->gen.context_reg, offsetof(m68k_context, status), SZ_B);
2013 } else {
2014 or_irdisp(code, inst->src.params.immed >> 8, opts->gen.context_reg, offsetof(m68k_context, status), SZ_B);
2015 }
2016 if ((base_flag == X0) ^ (((inst->src.params.immed >> 8) & (1 << BIT_SUPERVISOR)) > 0)) {
2020 //leave supervisor mode 2017 //leave supervisor mode
2021 swap_ssp_usp(opts); 2018 swap_ssp_usp(opts);
2022 } 2019 }
2023 if (inst->src.params.immed & 0x700) { 2020 if ((inst->op == M68K_ANDI_SR && (inst->src.params.immed & 0x700) != 0x700)
2024 call(code, opts->do_sync); 2021 || (inst->op == M68K_ORI_SR && inst->src.params.immed & 0x700)) {
2025 }
2026 }
2027 }
2028
2029 void translate_m68k_ori_ccr_sr(m68k_options *opts, m68kinst *inst)
2030 {
2031 code_info *code = &opts->gen.code;
2032 cycles(&opts->gen, 20);
2033 //TODO: If ORI to SR, trap if not in supervisor mode
2034 uint32_t flag_mask = 0;
2035 if (inst->src.params.immed & 0x1) {
2036 flag_mask |= C1;
2037 }
2038 if (inst->src.params.immed & 0x2) {
2039 flag_mask |= V1;
2040 }
2041 if (inst->src.params.immed & 0x4) {
2042 flag_mask |= Z1;
2043 }
2044 if (inst->src.params.immed & 0x8) {
2045 flag_mask |= N1;
2046 }
2047 if (inst->src.params.immed & 0x10) {
2048 flag_mask |= X1;
2049 }
2050 update_flags(opts, flag_mask);
2051 if (inst->op == M68K_ORI_SR) {
2052 or_irdisp(code, inst->src.params.immed >> 8, opts->gen.context_reg, offsetof(m68k_context, status), SZ_B);
2053 if (inst->src.params.immed & 0x700) {
2054 call(code, opts->do_sync); 2022 call(code, opts->do_sync);
2055 } 2023 }
2056 } 2024 }
2057 } 2025 }
2058 2026