Encode VFP load / store instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59084 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMCodeEmitter.cpp b/lib/Target/ARM/ARMCodeEmitter.cpp
index 29a8f31..2288ad1 100644
--- a/lib/Target/ARM/ARMCodeEmitter.cpp
+++ b/lib/Target/ARM/ARMCodeEmitter.cpp
@@ -124,6 +124,12 @@
void emitVFPConversionInstruction(const MachineInstr &MI);
+ void emitVFPLoadStoreInstruction(const MachineInstr &MI);
+
+ void emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI);
+
+ void emitMiscInstruction(const MachineInstr &MI);
+
/// getBinaryCodeForInstr - This function, generated by the
/// CodeEmitterGenerator using TableGen, produces the binary encoding for
/// machine instructions.
@@ -326,6 +332,15 @@
case ARMII::VFPConv2Frm:
emitVFPConversionInstruction(MI);
break;
+ case ARMII::VFPLdStFrm:
+ emitVFPLoadStoreInstruction(MI);
+ break;
+ case ARMII::VFPLdStMulFrm:
+ emitVFPLoadStoreMultipleInstruction(MI);
+ break;
+ case ARMII::VFPMiscFrm:
+ emitMiscInstruction(MI);
+ break;
}
}
@@ -759,23 +774,14 @@
emitWordLE(Binary);
}
-void ARMCodeEmitter::emitLoadStoreMultipleInstruction(const MachineInstr &MI) {
- // Part of binary is determined by TableGn.
- unsigned Binary = getBinaryCodeForInstr(MI);
-
- // Set the conditional execution predicate
- Binary |= II->getPredicate(&MI) << ARMII::CondShift;
-
- // Set first operand
- Binary |= getMachineOpValue(MI, 0) << ARMII::RegRnShift;
+static unsigned getAddrModeUPBits(unsigned Mode) {
+ unsigned Binary = 0;
// Set addressing mode by modifying bits U(23) and P(24)
// IA - Increment after - bit U = 1 and bit P = 0
// IB - Increment before - bit U = 1 and bit P = 1
// DA - Decrement after - bit U = 0 and bit P = 0
// DB - Decrement before - bit U = 0 and bit P = 1
- const MachineOperand &MO = MI.getOperand(1);
- ARM_AM::AMSubMode Mode = ARM_AM::getAM4SubMode(MO.getImm());
switch (Mode) {
default: assert(0 && "Unknown addressing sub-mode!");
case ARM_AM::da: break;
@@ -784,6 +790,23 @@
case ARM_AM::ib: Binary |= 0x3 << ARMII::U_BitShift; break;
}
+ return Binary;
+}
+
+void ARMCodeEmitter::emitLoadStoreMultipleInstruction(const MachineInstr &MI) {
+ // Part of binary is determined by TableGn.
+ unsigned Binary = getBinaryCodeForInstr(MI);
+
+ // Set the conditional execution predicate
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ // Set base address operand
+ Binary |= getMachineOpValue(MI, 0) << ARMII::RegRnShift;
+
+ // Set addressing mode by modifying bits U(23) and P(24)
+ const MachineOperand &MO = MI.getOperand(1);
+ Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(MO.getImm()));
+
// Set bit W(21)
if (ARM_AM::getAM4WBFlag(MO.getImm()))
Binary |= 0x1 << ARMII::W_BitShift;
@@ -791,8 +814,8 @@
// Set registers
for (unsigned i = 4, e = MI.getNumOperands(); i != e; ++i) {
const MachineOperand &MO = MI.getOperand(i);
- if (MO.isReg() && MO.isImplicit())
- continue;
+ if (!MO.isReg() || MO.isImplicit())
+ break;
unsigned RegNum = ARMRegisterInfo::getRegisterNumbering(MO.getReg());
assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
RegNum < 16);
@@ -1064,4 +1087,87 @@
emitWordLE(Binary);
}
+void ARMCodeEmitter::emitVFPLoadStoreInstruction(const MachineInstr &MI) {
+ // Part of binary is determined by TableGn.
+ unsigned Binary = getBinaryCodeForInstr(MI);
+
+ // Set the conditional execution predicate
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ unsigned OpIdx = 0;
+
+ // Encode Dd / Sd.
+ unsigned RegD = getMachineOpValue(MI, OpIdx++);
+ Binary |= (RegD & 0x0f) << ARMII::RegRdShift;
+ Binary |= (RegD & 0x10) << ARMII::D_BitShift;
+
+ // Encode address base.
+ const MachineOperand &Base = MI.getOperand(OpIdx++);
+ Binary |= getMachineOpValue(MI, Base) << ARMII::RegRnShift;
+
+ // If there is a non-zero immediate offset, encode it.
+ if (Base.isReg()) {
+ const MachineOperand &Offset = MI.getOperand(OpIdx);
+ if (unsigned ImmOffs = ARM_AM::getAM5Offset(Offset.getImm())) {
+ if (ARM_AM::getAM5Op(Offset.getImm()) == ARM_AM::add)
+ Binary |= 1 << ARMII::U_BitShift;
+ // Immediate offset is multiplied by 4.
+ Binary |= ImmOffs >> 2;
+ emitWordLE(Binary);
+ return;
+ }
+ }
+
+ // If immediate offset is omitted, default to +0.
+ Binary |= 1 << ARMII::U_BitShift;
+
+ emitWordLE(Binary);
+}
+
+void
+ARMCodeEmitter::emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI) {
+ // Part of binary is determined by TableGn.
+ unsigned Binary = getBinaryCodeForInstr(MI);
+
+ // Set the conditional execution predicate
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ // Set base address operand
+ Binary |= getMachineOpValue(MI, 0) << ARMII::RegRnShift;
+
+ // Set addressing mode by modifying bits U(23) and P(24)
+ const MachineOperand &MO = MI.getOperand(1);
+ Binary |= getAddrModeUPBits(ARM_AM::getAM5SubMode(MO.getImm()));
+
+ // Set bit W(21)
+ if (ARM_AM::getAM5WBFlag(MO.getImm()))
+ Binary |= 0x1 << ARMII::W_BitShift;
+
+ // First register is encoded in Dd.
+ unsigned FirstReg = MI.getOperand(4).getReg();
+ Binary |= ARMRegisterInfo::getRegisterNumbering(FirstReg)<< ARMII::RegRdShift;
+
+ // Number of registers are encoded in offset field.
+ unsigned NumRegs = 1;
+ for (unsigned i = 5, e = MI.getNumOperands(); i != e; ++i) {
+ const MachineOperand &MO = MI.getOperand(i);
+ if (!MO.isReg() || MO.isImplicit())
+ break;
+ ++NumRegs;
+ }
+ Binary |= NumRegs * 2;
+
+ emitWordLE(Binary);
+}
+
+void ARMCodeEmitter::emitMiscInstruction(const MachineInstr &MI) {
+ // Part of binary is determined by TableGn.
+ unsigned Binary = getBinaryCodeForInstr(MI);
+
+ // Set the conditional execution predicate
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ emitWordLE(Binary);
+}
+
#include "ARMGenCodeEmitter.inc"