diff options
Diffstat (limited to 'usr.bin/oemu/cpu.c')
| -rw-r--r-- | usr.bin/oemu/cpu.c | 60 |
1 files changed, 59 insertions, 1 deletions
diff --git a/usr.bin/oemu/cpu.c b/usr.bin/oemu/cpu.c index 49d4671..4aab553 100644 --- a/usr.bin/oemu/cpu.c +++ b/usr.bin/oemu/cpu.c @@ -187,6 +187,56 @@ cpu_mul(struct oemu_cpu *cpu, inst_t *inst) printf("%d * %d -> X%d, new=%d\n", imm, inst->imm, inst->rd, regs->xreg[inst->rd]); } +static void +cpu_and(struct oemu_cpu *cpu, inst_t *inst) +{ + struct cpu_regs *regs = &cpu->regs; + imm_t imm; + + if (inst->rd > NELEM(regs->xreg)) { + printf("bad register operand for 'and'\n"); + return; + } + + imm = inst->imm; + regs->xreg[inst->rd] &= inst->imm; + printf("X%d & %x -> X%d, new=%d\n", + inst->rd, inst->imm, inst->rd, regs->xreg[inst->rd]); +} + +static void +cpu_or(struct oemu_cpu *cpu, inst_t *inst) +{ + struct cpu_regs *regs = &cpu->regs; + imm_t imm; + + if (inst->rd > NELEM(regs->xreg)) { + printf("bad register operand for 'or'\n"); + return; + } + + imm = inst->imm; + regs->xreg[inst->rd] |= imm; + printf("X%d | %x -> X%d, new=%d\n", + inst->rd, inst->imm, inst->rd, regs->xreg[inst->rd]); +} + +static void +cpu_xor(struct oemu_cpu *cpu, inst_t *inst) +{ + struct cpu_regs *regs = &cpu->regs; + imm_t imm; + + if (inst->rd > NELEM(regs->xreg)) { + printf("bad register operand for 'xor'\n"); + return; + } + + imm = inst->imm; + regs->xreg[inst->rd] ^= imm; + printf("X%d ^ %x -> X%d, new=%d\n", + inst->rd, inst->imm, inst->rd, regs->xreg[inst->rd]); +} /* * Decode the INST_DIV instruction @@ -335,7 +385,6 @@ cpu_reset(struct oemu_cpu *cpu) regs->ilr = 0x0; memset(regs->xreg, 0x0, sizeof(regs->xreg)); } - void cpu_regdump(struct oemu_cpu *cpu) { @@ -402,6 +451,15 @@ cpu_kick(struct oemu_cpu *cpu, struct sysmem *mem) case INST_DIV: cpu_div(cpu, inst); break; + case INST_AND: + cpu_and(cpu, inst); + break; + case INST_OR: + cpu_or(cpu, inst); + break; + case INST_XOR: + cpu_xor(cpu, inst); + break; case INST_BR: cpu_br(cpu, inst); break; |