57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
#include <instructions/instructions.h>
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void instruction_nop(cpu_status_t* status){
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status->pc += 2;
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}
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void instruction_stsl_mash_amr(cpu_status_t* status){
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status->r[LO_NIBBLE(cpu_read8(status,status->pc))] -= 4;
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cpu_write32(status, status->r[LO_NIBBLE(cpu_read8(status,status->pc))], status->mach);
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status->pc += 2;
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}
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void instruction_stsl_macl_amr(cpu_status_t* status){
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status->r[LO_NIBBLE(cpu_read8(status,status->pc))] -= 4;
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cpu_write32(status, status->r[LO_NIBBLE(cpu_read8(status,status->pc))], status->macl);
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status->pc += 2;
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}
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void instruction_stsl_pr_amr(cpu_status_t* status){
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status->r[LO_NIBBLE(cpu_read8(status,status->pc))] -= 4;
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cpu_write32(status, status->r[LO_NIBBLE(cpu_read8(status,status->pc))],status->pr);
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status->pc += 2;
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}
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void instruction_clrt(cpu_status_t* status){
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status->t = 0;
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status->pc += 2;
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}
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void instruction_ldsl_arp_pr(cpu_status_t* status){
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status->pr = cpu_read32(status, status->r[LO_NIBBLE(cpu_read8(status,status->pc))]);
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status->r[LO_NIBBLE(cpu_read8(status,status->pc))] += 4;
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status->pc += 2;
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}
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void instruction_ldsl_arp_macl(cpu_status_t* status){
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status->macl = cpu_read32(status,status->r[LO_NIBBLE(cpu_read8(status,status->pc))]);
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status->r[LO_NIBBLE(cpu_read8(status,status->pc))] += 4;
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status->pc += 2;
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}
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void instruction_sts_macl_r(cpu_status_t* status){
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status->r[LO_NIBBLE(cpu_read8(status,status->pc))] = status->macl;
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status->pc += 2;
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}
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void instruction_ldc_r_gbr(cpu_status_t* status){
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status->gbr = status->r[LO_NIBBLE(cpu_read8(status,status->pc))];
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status->pc += 2;
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}
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void instruction_stc_gbr_r(cpu_status_t* status){
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status->r[LO_NIBBLE(cpu_read8(status,status->pc))] = status->gbr;
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status->pc += 2;
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} |