[Lldb-commits] [lldb] r128609 - in /lldb/trunk/source/Plugins: Instruction/ARM/EmulateInstructionARM.cpp Process/Utility/InstructionUtils.h
Caroline Tice
ctice at apple.com
Wed Mar 30 20:26:23 PDT 2011
Author: ctice
Date: Wed Mar 30 22:26:23 2011
New Revision: 128609
URL: http://llvm.org/viewvc/llvm-project?rev=128609&view=rev
Log:
Add "Bits64" utility function.
Add code to emulate VSTM ARM instruction (store multiple floating point registers).
Modified:
lldb/trunk/source/Plugins/Instruction/ARM/EmulateInstructionARM.cpp
lldb/trunk/source/Plugins/Process/Utility/InstructionUtils.h
Modified: lldb/trunk/source/Plugins/Instruction/ARM/EmulateInstructionARM.cpp
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Plugins/Instruction/ARM/EmulateInstructionARM.cpp?rev=128609&r1=128608&r2=128609&view=diff
==============================================================================
--- lldb/trunk/source/Plugins/Instruction/ARM/EmulateInstructionARM.cpp (original)
+++ lldb/trunk/source/Plugins/Instruction/ARM/EmulateInstructionARM.cpp Wed Mar 30 22:26:23 2011
@@ -10388,13 +10388,14 @@
if (ConditionPassed(opcode))
{
- bool single_regs;
- bool add;
- bool wback;
- uint32_t d;
- uint32_t n;
- uint32_t imm32;
- uint32_t regs;
+ bool single_regs;
+ bool add;
+ bool wback;
+ uint32_t d;
+ uint32_t n;
+ uint32_t imm32;
+ uint32_t regs;
+
switch (encoding)
{
case eEncodingT1:
@@ -10502,7 +10503,7 @@
context.type = eContextRegisterLoad;
// for r = 0 to regs-1
- for (uint32_t r = 0; r < regs; r++)
+ for (uint32_t r = 0; r < regs; ++r)
{
if (single_regs)
{
@@ -10553,6 +10554,202 @@
}
return true;
}
+
+// A8.6.399 VSTM
+bool
+EmulateInstructionARM::EmulateVSTM (const uint32_t opcode, const ARMEncoding encoding)
+{
+#if 0
+ if ConditionPassed() then
+ EncodingSpecificOperations(); CheckVFPEnabled(TRUE); NullCheckIfThumbEE(n);
+ address = if add then R[n] else R[n]-imm32;
+ if wback then R[n] = if add then R[n}+imm32 else R[n]-imm32;
+ for r = 0 to regs-1
+ if single_regs then
+ MemA[address,4] = S[d+r]; address = address+4;
+ else
+ // Store as two word-aligned words in the correct order for current endianness.
+ MemA[address,4] = if BigEndian() then D[d+r]<63:32> else D[d+r]<31:0>;
+ MemA[address+4,4] = if BigEndian() then D[d+r]<31:0> else D[d+r]<63:32>;
+ address = address+8;
+#endif
+
+ bool success = false;
+
+ if (ConditionPassed (opcode))
+ {
+ bool single_regs;
+ bool add;
+ bool wback;
+ uint32_t d;
+ uint32_t n;
+ uint32_t imm32;
+ uint32_t regs;
+
+ switch (encoding)
+ {
+ case eEncodingT1:
+ case eEncodingA1:
+ // if P == â0â && U == â0â && W == â0â then SEE âRelated encodingsâ;
+ // if P == â1â && U == â0â && W == â1â && Rn == â1101â then SEE VPUSH;
+ // if P == â1â && W == â0â then SEE VSTR;
+ // if P == U && W == â1â then UNDEFINED;
+ if ((Bit32 (opcode, 24) == Bit32 (opcode, 23)) && BitIsSet (opcode, 21))
+ return false;
+
+ // // Remaining combinations are PUW = 010 (IA without !), 011 (IA with !), 101 (DB with !)
+ // single_regs = FALSE; add = (U == â1â); wback = (W == â1â);
+ single_regs = false;
+ add = BitIsSet (opcode, 23);
+ wback = BitIsSet (opcode, 21);
+
+ // d = UInt(D:Vd); n = UInt(Rn); imm32 = ZeroExtend(imm8:â00â, 32);
+ d = (Bit32 (opcode, 22) << 4) | Bits32 (opcode, 15, 12);
+ n = Bits32 (opcode, 19, 16);
+ imm32 = Bits32 (opcode, 7, 0) << 2;
+
+ // regs = UInt(imm8) DIV 2; // If UInt(imm8) is odd, see âFSTMXâ.
+ regs = Bits32 (opcode, 7, 0) / 2;
+
+ // if n == 15 && (wback || CurrentInstrSet() != InstrSet_ARM) then UNPREDICTABLE;
+ if ((n == 15) && (wback || (CurrentInstrSet() != eModeARM)))
+ return false;
+
+ // if regs == 0 || regs > 16 || (d+regs) > 32 then UNPREDICTABLE;
+ if ((regs == 0) || (regs > 16) || ((d + regs) > 32))
+ return false;
+
+ break;
+
+ case eEncodingT2:
+ case eEncodingA2:
+ // if P == â0â && U == â0â && W == â0â then SEE âRelated encodingsâ;
+ // if P == â1â && U == â0â && W == â1â && Rn == â1101â then SEE VPUSH;
+ // if P == â1â && W == â0â then SEE VSTR;
+ // if P == U && W == â1â then UNDEFINED;
+ if ((Bit32 (opcode, 24) == Bit32 (opcode, 23)) && BitIsSet (opcode, 21))
+ return false;
+
+ // // Remaining combinations are PUW = 010 (IA without !), 011 (IA with !), 101 (DB with !)
+ // single_regs = TRUE; add = (U == â1â); wback = (W == â1â); d = UInt(Vd:D); n = UInt(Rn);
+ single_regs = true;
+ add = BitIsSet (opcode, 23);
+ wback = BitIsSet (opcode, 21);
+ d = (Bits32 (opcode, 15, 12) << 1) | Bit32 (opcode, 22);
+ n = Bits32 (opcode, 19, 16);
+
+ // imm32 = ZeroExtend(imm8:â00â, 32); regs = UInt(imm8);
+ imm32 = Bits32 (opcode, 7, 0) << 2;
+ regs = Bits32 (opcode, 7, 0);
+
+ // if n == 15 && (wback || CurrentInstrSet() != InstrSet_ARM) then UNPREDICTABLE;
+ if ((n == 15) && (wback || (CurrentInstrSet () != eModeARM)))
+ return false;
+
+ // if regs == 0 || (d+regs) > 32 then UNPREDICTABLE;
+ if ((regs == 0) || ((d + regs) > 32))
+ return false;
+
+ break;
+
+ default:
+ return false;
+ }
+
+ Register base_reg;
+ base_reg.SetRegister (eRegisterKindDWARF, dwarf_r0 + n);
+
+ uint32_t Rn = ReadCoreReg (n, &success);
+ if (!success)
+ return false;
+
+ // address = if add then R[n] else R[n]-imm32;
+ addr_t address;
+ if (add)
+ address = Rn;
+ else
+ address = Rn - imm32;
+
+ EmulateInstruction::Context context;
+ // if wback then R[n] = if add then R[n}+imm32 else R[n]-imm32;
+ if (wback)
+ {
+ uint32_t value;
+ if (add)
+ value = Rn + imm32;
+ else
+ value = Rn - imm32;
+
+ context.type = eContextAdjustBaseRegister;
+ context.SetRegisterPlusOffset (base_reg, value - Rn);
+
+ if (!WriteRegisterUnsigned (context, eRegisterKindDWARF, dwarf_r0 + n, value))
+ return false;
+ }
+
+ const uint32_t addr_byte_size = GetAddressByteSize();
+ uint32_t start_reg = single_regs ? dwarf_s0 : dwarf_d0;
+
+ context.type = eContextRegisterStore;
+ // for r = 0 to regs-1
+ for (int r = 0; r < regs; ++r)
+ {
+ Register data_reg;
+ data_reg.SetRegister (eRegisterKindDWARF, 0);
+ if (single_regs)
+ {
+ // MemA[address,4] = S[d+r]; address = address+4;
+ uint32_t data = ReadRegisterUnsigned (eRegisterKindDWARF, start_reg + d + r, 0, &success);
+ if (!success)
+ return false;
+
+ data_reg.num = start_reg + d + r;
+ context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn);
+ if (!MemAWrite (context, address, data, addr_byte_size))
+ return false;
+
+ address = address + 4;
+ }
+ else
+ {
+ // // Store as two word-aligned words in the correct order for current endianness.
+ // MemA[address,4] = if BigEndian() then D[d+r]<63:32> else D[d+r]<31:0>;
+ // MemA[address+4,4] = if BigEndian() then D[d+r]<31:0> else D[d+r]<63:32>;
+ uint64_t data = ReadRegisterUnsigned (eRegisterKindDWARF, start_reg + d + r, 0, &success);
+ if (!success)
+ return false;
+
+ data_reg.num = start_reg + d + r;
+
+ if (m_byte_order == eByteOrderBig)
+ {
+ context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn);
+ if (!MemAWrite (context, address, Bits64 (data, 63, 32), addr_byte_size))
+ return false;
+
+ context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, (address + 4) - Rn);
+ if (!MemAWrite (context, address+ 4, Bits64 (data, 31, 0), addr_byte_size))
+ return false;
+ }
+ else
+ {
+ context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, address - Rn);
+ if (!MemAWrite (context, address, Bits64 (data, 31, 0), addr_byte_size))
+ return false;
+
+ context.SetRegisterToRegisterPlusOffset (data_reg, base_reg, (address + 4) - Rn);
+ if (!MemAWrite (context, address + 4, Bits64 (data, 63, 32), addr_byte_size))
+ return false;
+ }
+ // address = address+8;
+ address = address + 8;
+ }
+ }
+ }
+ return true;
+}
+
+
EmulateInstructionARM::ARMOpcode*
EmulateInstructionARM::GetARMOpcodeForInstruction (const uint32_t opcode)
@@ -10734,7 +10931,7 @@
{ 0x0e5000f0, 0x004000d0, ARMV5TE_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRDImmediate, "ldrd<c> <Rt>, <Rt2>, [<Rn>,#+/-<imm8>]!"},
{ 0x0e500ff0, 0x000000d0, ARMV5TE_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateLDRDRegister, "ldrd<c> <Rt>, <Rt2>, [<Rn>, +/-<Rm>]{!}"},
{ 0x0e100f00, 0x0c100b00, ARMvAll, eEncodingA1, VFPv2_ABOVE, eSize32, &EmulateInstructionARM::EmulateVLDM, "vldm{mode}<c> <Rn>{!}, <list>"},
- { 0x0e100f00, 0x0c100a00, ARMvAll, eEncodingA2, VFPv2v3, eSize32, &EmulateInstructionARM::EmulateVLDM, "vldm{most}<c> <Rn>{!}, <list>"},
+ { 0x0e100f00, 0x0c100a00, ARMvAll, eEncodingA2, VFPv2v3, eSize32, &EmulateInstructionARM::EmulateVLDM, "vldm{mode}<c> <Rn>{!}, <list>"},
//----------------------------------------------------------------------
// Store instructions
@@ -10750,6 +10947,8 @@
{ 0x0e500000, 0x04000000, ARMvAll, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRImmARM, "str<c> <Rt>,[<Rn>,#+/-<imm12>]!"},
{ 0x0e5000f0, 0x004000f0, ARMV5TE_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRDImm, "strc<c> <Rt>, <Rt2>, [<Rn> #+/-<imm8>]!"},
{ 0x0e500ff0, 0x000000f0, ARMV5TE_ABOVE, eEncodingA1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRDReg, "strd<c> <Rt>, <Rt2>, [<Rn>, +/-<Rm>]{!}"},
+ { 0x0e100f00, 0x0c000b00, ARMvAll, eEncodingA1, VFPv2_ABOVE, eSize32, &EmulateInstructionARM::EmulateVSTM, "vstm{mode}<c> <Rn>{!} <list>"},
+ { 0x0e100f00, 0x0c000a00, ARMvAll, eEncodingA2, VFPv2v3, eSize32, &EmulateInstructionARM::EmulateVSTM, "vstm{mode}<c> <Rn>{!} <list>"},
//----------------------------------------------------------------------
// Other instructions
@@ -11044,6 +11243,8 @@
{ 0xfff00fc0, 0xf8200000, ARMV6T2_ABOVE, eEncodingT2, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRHRegister, "strh<c>.w <Rt>,[<Rn>,<Rm>{,LSL #<imm2>}]" },
{ 0xfff00000, 0xe8400000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTREX, "strex<c> <Rd>, <Rt>, [<Rn{,#<imm>}]" },
{ 0xfe500000, 0xe8400000, ARMV6T2_ABOVE, eEncodingT1, No_VFP, eSize32, &EmulateInstructionARM::EmulateSTRDImm, "strd<c> <Rt>, <Rt2>, [<Rn>, #+/-<imm>]!"},
+ { 0xfe100f00, 0xec000b00, ARMvAll, eEncodingT1, VFPv2_ABOVE, eSize32, &EmulateInstructionARM::EmulateVSTM, "vstm{mode}<c> <Rn>{!}, <list>"},
+ { 0xfea00f00, 0xec000a00, ARMvAll, eEncodingT2, VFPv2v3, eSize32, &EmulateInstructionARM::EmulateVSTM, "vstm{mode}<c> <Rn>{!}, <list>"},
//----------------------------------------------------------------------
// Other instructions
Modified: lldb/trunk/source/Plugins/Process/Utility/InstructionUtils.h
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Plugins/Process/Utility/InstructionUtils.h?rev=128609&r1=128608&r2=128609&view=diff
==============================================================================
--- lldb/trunk/source/Plugins/Process/Utility/InstructionUtils.h (original)
+++ lldb/trunk/source/Plugins/Process/Utility/InstructionUtils.h Wed Mar 30 22:26:23 2011
@@ -15,6 +15,15 @@
namespace lldb_private {
// Return the bit field(s) from the most significant bit (msbit) to the
+// least significant bit (lsbit) of a 64-bit unsigned value.
+static inline uint64_t
+Bits64 (const uint64_t bits, const uint32_t msbit, const uint32_t lsbit)
+{
+ assert(msbit < 64 && lsbit <= msbit);
+ return (bits >> lsbit) & ((1u << (msbit - lsbit + 1)) - 1);
+}
+
+// Return the bit field(s) from the most significant bit (msbit) to the
// least significant bit (lsbit) of a 32-bit unsigned value.
static inline uint32_t
Bits32 (const uint32_t bits, const uint32_t msbit, const uint32_t lsbit)
More information about the lldb-commits
mailing list