void Simulator::ResetState() {
// Reset the system registers.
nzcv_ = SimSystemRegister::DefaultValueFor(NZCV);
fpcr_ = SimSystemRegister::DefaultValueFor(FPCR);
// Reset registers to 0.
pc_ = NULL;
pc_modified_ = false;
for (unsigned i = 0; i < kNumberOfRegisters; i++) {
set_xreg(i, 0xbadbeef);
}
// Set FP registers to a value that is a NaN in both 32-bit and 64-bit FP.
uint64_t nan_bits = UINT64_C(0x7ff0dead7f8beef1);
VIXL_ASSERT(IsSignallingNaN(rawbits_to_double(nan_bits & kDRegMask)));
VIXL_ASSERT(IsSignallingNaN(rawbits_to_float(nan_bits & kSRegMask)));
for (unsigned i = 0; i < kNumberOfFPRegisters; i++) {
set_dreg_bits(i, nan_bits);
}
// Returning to address 0 exits the Simulator.
set_lr(kEndOfSimAddress);
set_resume_pc(nullptr);
}
float float_pack(uint32_t sign, uint32_t exp, uint32_t mantissa) {
uint32_t bits = (sign << 31) | (exp << 23) | mantissa;
return rawbits_to_float(bits);
}