6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-07-24 22:24:54 +00:00
Code Issues Projects Releases Wiki Activity

Distinguish and choose 16 or 32 bit forms of save/restore for Mips16.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196999 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reed Kotler
2013-12-11 03:32:44 +00:00
parent ec5ebdec47
commit d194a4ae67
3 changed files with 80 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
lib/Target/Mips/Mips16InstrInfo.cpp
View File

@@ -1,3 +1,4 @@
//===-- Mips16InstrInfo.cpp - Mips16 Instruction Information --------------===//
//
// The LLVM Compiler Infrastructure
@@ -176,9 +177,10 @@ void Mips16InstrInfo::makeFrame(unsigned SP, int64_t FrameSize,
const BitVector Reserved = RI.getReservedRegs(*MBB.getParent());
bool SaveS2 = Reserved[Mips::S2];
MachineInstrBuilder MIB;
unsigned Opc = ((FrameSize <= 128) && !SaveS2)? Mips::Save16:Mips::SaveX16;
if (isUInt<11>(FrameSize))
MIB = BuildMI(
MBB, I, DL, get(Mips::SaveX16)).addReg(Mips::RA).
MBB, I, DL, get(Opc)).addReg(Mips::RA).
addReg(Mips::S0).
addReg(Mips::S1).addImm(FrameSize);
else {
@@ -186,7 +188,7 @@ void Mips16InstrInfo::makeFrame(unsigned SP, int64_t FrameSize,
// returns largest possible n bit unsigned integer
int64_t Remainder = FrameSize - Base;
MIB = BuildMI(
MBB, I, DL, get(Mips::SaveX16)).addReg(Mips::RA).
MBB, I, DL, get(Opc)).addReg(Mips::RA).
addReg(Mips::S0).
addReg(Mips::S1).addImm(Base);
if (isInt<16>(-Remainder))
@@ -206,9 +208,11 @@ void Mips16InstrInfo::restoreFrame(unsigned SP, int64_t FrameSize,
const BitVector Reserved = RI.getReservedRegs(*MBB.getParent());
bool SaveS2 = Reserved[Mips::S2];
MachineInstrBuilder MIB;
unsigned Opc = ((FrameSize <= 128) && !SaveS2)?
Mips::Restore16:Mips::RestoreX16;
if (isUInt<11>(FrameSize))
MIB = BuildMI(
MBB, I, DL, get(Mips::RestoreX16)).
MBB, I, DL, get(Opc)).
addReg(Mips::RA, RegState::Define).
addReg(Mips::S0, RegState::Define).
addReg(Mips::S1, RegState::Define).
@@ -222,7 +226,7 @@ void Mips16InstrInfo::restoreFrame(unsigned SP, int64_t FrameSize,
else
adjustStackPtrBig(SP, Remainder, MBB, I, Mips::A0, Mips::A1);
MIB = BuildMI(
MBB, I, DL, get(Mips::RestoreX16)).
MBB, I, DL, get(Opc)).
addReg(Mips::RA, RegState::Define).
addReg(Mips::S0, RegState::Define).
addReg(Mips::S1, RegState::Define).