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-rw-r--r--llvm/lib/Target/ARM/ARMInstrVFP.td76
-rw-r--r--llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp6
-rw-r--r--llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp24
3 files changed, 71 insertions, 35 deletions
diff --git a/llvm/lib/Target/ARM/ARMInstrVFP.td b/llvm/lib/Target/ARM/ARMInstrVFP.td
index b43216fb5c5..0549a198b5b 100644
--- a/llvm/lib/Target/ARM/ARMInstrVFP.td
+++ b/llvm/lib/Target/ARM/ARMInstrVFP.td
@@ -2164,28 +2164,32 @@ let Defs = [CPSR], Uses = [FPSCR_NZCV], Rt = 0b1111 /* apsr_nzcv */ in
def FMSTAT : MovFromVFP<0b0001 /* fpscr */, (outs), (ins),
"vmrs", "\tAPSR_nzcv, fpscr", [(arm_fmstat)]>;
-// Application level FPSCR -> GPR
-let hasSideEffects = 1, Uses = [FPSCR] in
-def VMRS : MovFromVFP<0b0001 /* fpscr */, (outs GPR:$Rt), (ins),
- "vmrs", "\t$Rt, fpscr",
- [(set GPR:$Rt, (int_arm_get_fpscr))]>;
-
-// System level FPEXC, FPSID -> GPR
-let Uses = [FPSCR] in {
- def VMRS_FPEXC : MovFromVFP<0b1000 /* fpexc */, (outs GPR:$Rt), (ins),
- "vmrs", "\t$Rt, fpexc", []>;
- def VMRS_FPSID : MovFromVFP<0b0000 /* fpsid */, (outs GPR:$Rt), (ins),
- "vmrs", "\t$Rt, fpsid", []>;
- def VMRS_MVFR0 : MovFromVFP<0b0111 /* mvfr0 */, (outs GPR:$Rt), (ins),
+let DecoderMethod = "DecodeForVMRSandVMSR" in {
+ // Application level FPSCR -> GPR
+ let hasSideEffects = 1, Uses = [FPSCR] in
+ def VMRS : MovFromVFP<0b0001 /* fpscr */, (outs GPRnopc:$Rt), (ins),
+ "vmrs", "\t$Rt, fpscr",
+ [(set GPRnopc:$Rt, (int_arm_get_fpscr))]>;
+
+ // System level FPEXC, FPSID -> GPR
+ let Uses = [FPSCR] in {
+ def VMRS_FPEXC : MovFromVFP<0b1000 /* fpexc */, (outs GPRnopc:$Rt), (ins),
+ "vmrs", "\t$Rt, fpexc", []>;
+ def VMRS_FPSID : MovFromVFP<0b0000 /* fpsid */, (outs GPRnopc:$Rt), (ins),
+ "vmrs", "\t$Rt, fpsid", []>;
+ def VMRS_MVFR0 : MovFromVFP<0b0111 /* mvfr0 */, (outs GPRnopc:$Rt), (ins),
"vmrs", "\t$Rt, mvfr0", []>;
- def VMRS_MVFR1 : MovFromVFP<0b0110 /* mvfr1 */, (outs GPR:$Rt), (ins),
- "vmrs", "\t$Rt, mvfr1", []>;
- def VMRS_MVFR2 : MovFromVFP<0b0101 /* mvfr2 */, (outs GPR:$Rt), (ins),
- "vmrs", "\t$Rt, mvfr2", []>, Requires<[HasFPARMv8]>;
- def VMRS_FPINST : MovFromVFP<0b1001 /* fpinst */, (outs GPR:$Rt), (ins),
- "vmrs", "\t$Rt, fpinst", []>;
- def VMRS_FPINST2 : MovFromVFP<0b1010 /* fpinst2 */, (outs GPR:$Rt), (ins),
- "vmrs", "\t$Rt, fpinst2", []>;
+ def VMRS_MVFR1 : MovFromVFP<0b0110 /* mvfr1 */, (outs GPRnopc:$Rt), (ins),
+ "vmrs", "\t$Rt, mvfr1", []>;
+ let Predicates = [HasFPARMv8] in {
+ def VMRS_MVFR2 : MovFromVFP<0b0101 /* mvfr2 */, (outs GPRnopc:$Rt), (ins),
+ "vmrs", "\t$Rt, mvfr2", []>;
+ }
+ def VMRS_FPINST : MovFromVFP<0b1001 /* fpinst */, (outs GPRnopc:$Rt), (ins),
+ "vmrs", "\t$Rt, fpinst", []>;
+ def VMRS_FPINST2 : MovFromVFP<0b1010 /* fpinst2 */, (outs GPRnopc:$Rt),
+ (ins), "vmrs", "\t$Rt, fpinst2", []>;
+ }
}
//===----------------------------------------------------------------------===//
@@ -2209,21 +2213,23 @@ class MovToVFP<bits<4> opc19_16, dag oops, dag iops, string opc, string asm,
let Inst{4} = 1;
}
-let Defs = [FPSCR] in {
- // Application level GPR -> FPSCR
- def VMSR : MovToVFP<0b0001 /* fpscr */, (outs), (ins GPR:$src),
- "vmsr", "\tfpscr, $src", [(int_arm_set_fpscr GPR:$src)]>;
- // System level GPR -> FPEXC
- def VMSR_FPEXC : MovToVFP<0b1000 /* fpexc */, (outs), (ins GPR:$src),
- "vmsr", "\tfpexc, $src", []>;
- // System level GPR -> FPSID
- def VMSR_FPSID : MovToVFP<0b0000 /* fpsid */, (outs), (ins GPR:$src),
- "vmsr", "\tfpsid, $src", []>;
-
- def VMSR_FPINST : MovToVFP<0b1001 /* fpinst */, (outs), (ins GPR:$src),
+let DecoderMethod = "DecodeForVMRSandVMSR" in {
+ let Defs = [FPSCR] in {
+ // Application level GPR -> FPSCR
+ def VMSR : MovToVFP<0b0001 /* fpscr */, (outs), (ins GPRnopc:$src),
+ "vmsr", "\tfpscr, $src",
+ [(int_arm_set_fpscr GPRnopc:$src)]>;
+ // System level GPR -> FPEXC
+ def VMSR_FPEXC : MovToVFP<0b1000 /* fpexc */, (outs), (ins GPRnopc:$src),
+ "vmsr", "\tfpexc, $src", []>;
+ // System level GPR -> FPSID
+ def VMSR_FPSID : MovToVFP<0b0000 /* fpsid */, (outs), (ins GPRnopc:$src),
+ "vmsr", "\tfpsid, $src", []>;
+ def VMSR_FPINST : MovToVFP<0b1001 /* fpinst */, (outs), (ins GPRnopc:$src),
"vmsr", "\tfpinst, $src", []>;
- def VMSR_FPINST2 : MovToVFP<0b1010 /* fpinst2 */, (outs), (ins GPR:$src),
- "vmsr", "\tfpinst2, $src", []>;
+ def VMSR_FPINST2 : MovToVFP<0b1010 /* fpinst2 */, (outs), (ins GPRnopc:$src),
+ "vmsr", "\tfpinst2, $src", []>;
+ }
}
//===----------------------------------------------------------------------===//
diff --git a/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index 4b10874481d..287ed20988f 100644
--- a/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -8805,6 +8805,12 @@ unsigned ARMAsmParser::checkTargetMatchPredicate(MCInst &Inst) {
return Match_RequiresV8;
}
+ // Use of SP for VMRS/VMSR is only allowed in ARM mode with the exception of
+ // ARMv8-A.
+ if ((Inst.getOpcode() == ARM::VMRS || Inst.getOpcode() == ARM::VMSR) &&
+ Inst.getOperand(0).getReg() == ARM::SP && (isThumb() && !hasV8Ops()))
+ return Match_InvalidOperand;
+
for (unsigned I = 0; I < MCID.NumOperands; ++I)
if (MCID.OpInfo[I].RegClass == ARM::rGPRRegClassID) {
// rGPRRegClass excludes PC, and also excluded SP before ARMv8
diff --git a/llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp b/llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
index e8bfa6b2a8c..e3854989c4f 100644
--- a/llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
+++ b/llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
@@ -400,6 +400,8 @@ static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecoderForMRRC2AndMCRR2(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeForVMRSandVMSR(MCInst &Inst, unsigned Val,
+ uint64_t Address, const void *Decoder);
#include "ARMGenDisassemblerTables.inc"
@@ -5284,3 +5286,25 @@ static DecodeStatus DecoderForMRRC2AndMCRR2(MCInst &Inst, unsigned Val,
return S;
}
+
+static DecodeStatus DecodeForVMRSandVMSR(MCInst &Inst, unsigned Val,
+ uint64_t Address,
+ const void *Decoder) {
+ const FeatureBitset &featureBits =
+ ((const MCDisassembler *)Decoder)->getSubtargetInfo().getFeatureBits();
+ DecodeStatus S = MCDisassembler::Success;
+
+ unsigned Rt = fieldFromInstruction(Val, 12, 4);
+
+ if (featureBits[ARM::ModeThumb] && !featureBits[ARM::HasV8Ops]) {
+ if (Rt == 13 || Rt == 15)
+ S = MCDisassembler::SoftFail;
+ Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder));
+ } else
+ Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder));
+
+ Inst.addOperand(MCOperand::createImm(ARMCC::AL));
+ Inst.addOperand(MCOperand::createReg(0));
+
+ return S;
+}
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