// convert JVMCI register indices (as used in oop maps) to HotSpot registers
VMReg CodeInstaller::get_hotspot_reg(jint jvmci_reg, TRAPS) {
if (jvmci_reg < RegisterImpl::number_of_registers) {
return as_Register(jvmci_reg)->as_VMReg();
} else {
jint floatRegisterNumber = jvmci_reg - RegisterImpl::number_of_registers;
if (floatRegisterNumber < XMMRegisterImpl::number_of_registers) {
return as_XMMRegister(floatRegisterNumber)->as_VMReg();
}
JVMCI_ERROR_NULL("invalid register number: %d", jvmci_reg);
}
}
// convert JVMCI register indices (as used in oop maps) to HotSpot registers
VMReg CodeInstaller::get_hotspot_reg(jint jvmci_reg, TRAPS) {
// JVMCI Registers are numbered as follows:
// 0..31: Thirty-two General Purpose registers (CPU Registers)
// 32..63: Thirty-two single precision float registers
// 64..95: Thirty-two double precision float registers
// 96..111: Sixteen quad precision float registers
if (jvmci_reg < 32) {
return as_Register(jvmci_reg)->as_VMReg();
} else {
jint floatRegisterNumber;
if(jvmci_reg < 64) { // Single precision
floatRegisterNumber = jvmci_reg - 32;
} else if(jvmci_reg < 96) {
floatRegisterNumber = 2 * (jvmci_reg - 64);
} else if(jvmci_reg < 112) {
floatRegisterNumber = 4 * (jvmci_reg - 96);
} else {
JVMCI_ERROR_NULL("invalid register number: %d", jvmci_reg);
}
return as_FloatRegister(floatRegisterNumber)->as_VMReg();
}
}
