MFI->setStackSize(NumBytes);
// adjust stack pointer: r1 -= numbytes
- if (NumBytes) {
- MI = BuildMI(PPC32::STWU, 2, PPC32::R1).addSImm(-NumBytes).addReg(PPC32::R1);
+ if (NumBytes <= 32768) {
+ MI = BuildMI(PPC32::STWU, 3).addReg(PPC32::R1).addSImm(-NumBytes)
+ .addReg(PPC32::R1);
+ MBB.insert(MBBI, MI);
+ } else {
+ int NegNumbytes = -NumBytes;
+ MI = BuildMI(PPC32::LIS, 1, PPC32::R0).addSImm(NegNumbytes >> 16);
+ MBB.insert(MBBI, MI);
+ MI = BuildMI(PPC32::ORI, 2, PPC32::R0).addReg(PPC32::R0)
+ .addImm(NegNumbytes & 0xFFFF);
+ MBB.insert(MBBI, MI);
+ MI = BuildMI(PPC32::STWUX, 3).addReg(PPC32::R1).addReg(PPC32::R1)
+ .addReg(PPC32::R0);
MBB.insert(MBBI, MI);
}
}
MBB.insert(MBBI, MI);
}
// Adjust stack pointer back
- MI = BuildMI(PPC32::ADDI, 2, PPC32::R1).addReg(PPC32::R1).addSImm(NumBytes);
- MBB.insert(MBBI, MI);
+ if (NumBytes <= 32767) {
+ MI = BuildMI(PPC32::ADDI, 2, PPC32::R1).addReg(PPC32::R1).addSImm(NumBytes);
+ MBB.insert(MBBI, MI);
+ } else {
+ MI = BuildMI(PPC32::LWZ, 2, PPC32::R1).addSImm(0).addReg(PPC32::R1);
+ MBB.insert(MBBI, MI);
+ }
}
#include "PowerPCGenRegisterInfo.inc"