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Simulation bug fixes.

This commit is contained in:
Daniel Beer 2010-03-20 18:21:29 +13:00
parent 070de76844
commit 39338c5a73
1 changed files with 15 additions and 7 deletions
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22
sim.c
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@ -204,6 +204,7 @@ static int step_double(u_int16_t ins)
u_int32_t dst_data;
u_int32_t res_data;
u_int32_t msb = is_byte ? 0x80 : 0x8000;
u_int32_t mask = is_byte ? 0xff : 0xffff;
fetch_operand(amode_src, sreg, is_byte, NULL, &src_data);
fetch_operand(amode_dst, dreg, is_byte, &dst_addr,
@ -223,7 +224,7 @@ static int step_double(u_int16_t ins)
if (opcode == MSP430_OP_ADDC || opcode == MSP430_OP_SUBC)
res_data = (sim_regs[MSP430_REG_SR] &
MSP430_SR_C) ? 1 : 0;
else if (opcode == MSP430_OP_SUB)
else if (opcode == MSP430_OP_SUB || opcode == MSP430_OP_CMP)
res_data = 1;
else
res_data = 0;
@ -232,7 +233,7 @@ static int step_double(u_int16_t ins)
res_data += dst_data;
sim_regs[MSP430_REG_SR] &= ~ARITH_BITS;
if (!res_data)
if (!(res_data & mask))
sim_regs[MSP430_REG_SR] |= MSP430_SR_Z;
if (res_data & msb)
sim_regs[MSP430_REG_SR] |= MSP430_SR_N;
@ -249,7 +250,7 @@ static int step_double(u_int16_t ins)
res_data++;
sim_regs[MSP430_REG_SR] &= ~ARITH_BITS;
if (!res_data)
if (!(res_data & mask))
sim_regs[MSP430_REG_SR] |= MSP430_SR_Z;
if (res_data == 1)
sim_regs[MSP430_REG_SR] |= MSP430_SR_N;
@ -264,7 +265,7 @@ static int step_double(u_int16_t ins)
sim_regs[MSP430_REG_SR] &= ~ARITH_BITS;
sim_regs[MSP430_REG_SR] |=
res_data ? MSP430_SR_C : MSP430_SR_Z;
(res_data & mask) ? MSP430_SR_C : MSP430_SR_Z;
if (res_data & msb)
sim_regs[MSP430_REG_SR] |= MSP430_SR_N;
break;
@ -281,7 +282,7 @@ static int step_double(u_int16_t ins)
res_data = dst_data ^ src_data;
sim_regs[MSP430_REG_SR] &= ~ARITH_BITS;
sim_regs[MSP430_REG_SR] |=
res_data ? MSP430_SR_C : MSP430_SR_Z;
(res_data & mask) ? MSP430_SR_C : MSP430_SR_Z;
if (res_data & msb)
sim_regs[MSP430_REG_SR] |= MSP430_SR_N;
if (src_data & dst_data & msb)
@ -308,6 +309,7 @@ static int step_single(u_int16_t ins)
int amode = (ins >> 4) & 0x3;
int reg = ins & 0x000f;
u_int16_t msb = is_byte ? 0x80 : 0x8000;
u_int32_t mask = is_byte ? 0xff : 0xffff;
u_int16_t src_addr = 0;
u_int32_t src_data;
u_int32_t res_data;
@ -326,7 +328,7 @@ static int step_single(u_int16_t ins)
}
sim_regs[MSP430_REG_SR] &= ~ARITH_BITS;
if (!res_data)
if (!(res_data & mask))
sim_regs[MSP430_REG_SR] |= MSP430_SR_Z;
if (res_data & msb)
sim_regs[MSP430_REG_SR] |= MSP430_SR_N;
@ -347,7 +349,8 @@ static int step_single(u_int16_t ins)
sim_regs[MSP430_REG_SR] |= MSP430_SR_N;
}
sim_regs[MSP430_REG_SR] |= res_data ? MSP430_SR_C : MSP430_SR_Z;
sim_regs[MSP430_REG_SR] |=
(res_data & mask) ? MSP430_SR_C : MSP430_SR_Z;
break;
case MSP430_OP_PUSH:
@ -511,6 +514,11 @@ static int sim_wait(void)
sim_regs[MSP430_REG_PC] == run_breakpoint)
break;
if (sim_regs[MSP430_REG_SR] & MSP430_SR_CPUOFF) {
printf("CPU disabled\n");
break;
}
if (ctrlc_check()) {
run_mode = RUN_HALTED;
return 1;