[arm] Support float registers for moves and swaps.

src/compiler/arm/code-generator-arm.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/code-generator.h"
 
 #include "src/arm/macro-assembler-arm.h"
 #include "src/ast/scopes.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
@@ skipping 1090 matching lines @@
       DCHECK_EQ(LeaveCC, i.OutputSBit());
       break;
     }
     case kArmVcvtU32F64: {
       SwVfpRegister scratch = kScratchDoubleReg.low();
       __ vcvt_u32_f64(scratch, i.InputFloat64Register(0));
       __ vmov(i.OutputRegister(), scratch);
       DCHECK_EQ(LeaveCC, i.OutputSBit());
       break;
     }
+    case kArmVmovU32F32:
+      __ vmov(i.OutputRegister(), i.InputFloat32Register(0));
+      DCHECK_EQ(LeaveCC, i.OutputSBit());
+      break;
     case kArmVmovLowU32F64:
       __ VmovLow(i.OutputRegister(), i.InputFloat64Register(0));
       DCHECK_EQ(LeaveCC, i.OutputSBit());
       break;
     case kArmVmovLowF64U32:
       __ VmovLow(i.OutputFloat64Register(), i.InputRegister(1));
       DCHECK_EQ(LeaveCC, i.OutputSBit());
       break;
     case kArmVmovHighU32F64:
       __ VmovHigh(i.OutputRegister(), i.InputFloat64Register(0));
@@ skipping 463 matching lines @@
       DCHECK_EQ(Constant::kFloat64, src.type());
       DwVfpRegister dst = destination->IsFPRegister()
                               ? g.ToFloat64Register(destination)
                               : kScratchDoubleReg;
       __ vmov(dst, src.ToFloat64(), kScratchReg);
       if (destination->IsFPStackSlot()) {
         __ vstr(dst, g.ToMemOperand(destination));
       }
     }
   } else if (source->IsFPRegister()) {
-    DwVfpRegister src = g.ToDoubleRegister(source);
+    MachineRepresentation rep = LocationOperand::cast(source)->representation();
+    if (rep == MachineRepresentation::kFloat64) {
+      DwVfpRegister src = g.ToDoubleRegister(source);
+      if (destination->IsFPRegister()) {
+        DwVfpRegister dst = g.ToDoubleRegister(destination);
+        __ Move(dst, src);
+      } else {
+        DCHECK(destination->IsFPStackSlot());
+        __ vstr(src, g.ToMemOperand(destination));
+      }
+    } else {
+      DCHECK_EQ(MachineRepresentation::kFloat32, rep);
+      SwVfpRegister src = g.ToFloat32Register(source);
+      if (destination->IsFPRegister()) {
+        SwVfpRegister dst = g.ToFloat32Register(destination);
+        __ Move(dst, src);
+      } else {
+        DCHECK(destination->IsFPStackSlot());
+        __ vstr(src, g.ToMemOperand(destination));
+      }
+    }
+  } else if (source->IsFPStackSlot()) {
+    MemOperand src = g.ToMemOperand(source);
+    MachineRepresentation rep =
+        LocationOperand::cast(destination)->representation();
     if (destination->IsFPRegister()) {
-      DwVfpRegister dst = g.ToDoubleRegister(destination);
-      __ Move(dst, src);
+      if (rep == MachineRepresentation::kFloat64) {
+        __ vldr(g.ToDoubleRegister(destination), src);
+      } else {
+        DCHECK_EQ(MachineRepresentation::kFloat32, rep);
+        __ vldr(g.ToFloat32Register(destination), src);
+      }
     } else {
       DCHECK(destination->IsFPStackSlot());
-      __ vstr(src, g.ToMemOperand(destination));
-    }
-  } else if (source->IsFPStackSlot()) {
-    DCHECK(destination->IsFPRegister() || destination->IsFPStackSlot());
-    MemOperand src = g.ToMemOperand(source);
-    if (destination->IsFPRegister()) {
-      __ vldr(g.ToDoubleRegister(destination), src);
-    } else {
-      DwVfpRegister temp = kScratchDoubleReg;
-      __ vldr(temp, src);
-      __ vstr(temp, g.ToMemOperand(destination));
+      if (rep == MachineRepresentation::kFloat64) {
+        DwVfpRegister temp = kScratchDoubleReg;
+        __ vldr(temp, src);
+        __ vstr(temp, g.ToMemOperand(destination));
+      } else {
+        DCHECK_EQ(MachineRepresentation::kFloat32, rep);
+        SwVfpRegister temp = kScratchDoubleReg.low();
+        __ vldr(temp, src);
+        __ vstr(temp, g.ToMemOperand(destination));
+      }
     }
   } else {
     UNREACHABLE();
   }
 }
 
 
 void CodeGenerator::AssembleSwap(InstructionOperand* source,
                                  InstructionOperand* destination) {
   ArmOperandConverter g(this, nullptr);
@@ skipping 19 matching lines @@
     DCHECK(destination->IsStackSlot());
     Register temp_0 = kScratchReg;
     SwVfpRegister temp_1 = kScratchDoubleReg.low();
     MemOperand src = g.ToMemOperand(source);
     MemOperand dst = g.ToMemOperand(destination);
     __ ldr(temp_0, src);
     __ vldr(temp_1, dst);
     __ str(temp_0, dst);
     __ vstr(temp_1, src);
   } else if (source->IsFPRegister()) {
-    DwVfpRegister temp = kScratchDoubleReg;
-    DwVfpRegister src = g.ToDoubleRegister(source);
-    if (destination->IsFPRegister()) {
-      DwVfpRegister dst = g.ToDoubleRegister(destination);
-      __ Move(temp, src);
-      __ Move(src, dst);
-      __ Move(dst, temp);
+    MachineRepresentation rep = LocationOperand::cast(source)->representation();
+    LowDwVfpRegister temp = kScratchDoubleReg;
+    if (rep == MachineRepresentation::kFloat64) {
+      DwVfpRegister src = g.ToDoubleRegister(source);
+      if (destination->IsFPRegister()) {
+        DwVfpRegister dst = g.ToDoubleRegister(destination);
+        __ Move(temp, src);
+        __ Move(src, dst);
+        __ Move(dst, temp);
+      } else {
+        DCHECK(destination->IsFPStackSlot());
+        MemOperand dst = g.ToMemOperand(destination);
+        __ Move(temp, src);
+        __ vldr(src, dst);
+        __ vstr(temp, dst);
+      }
     } else {
-      DCHECK(destination->IsFPStackSlot());
-      MemOperand dst = g.ToMemOperand(destination);
-      __ Move(temp, src);
-      __ vldr(src, dst);
-      __ vstr(temp, dst);
+      DCHECK_EQ(MachineRepresentation::kFloat32, rep);
+      SwVfpRegister src = g.ToFloat32Register(source);
+      if (destination->IsFPRegister()) {
+        SwVfpRegister dst = g.ToFloat32Register(destination);
+        __ Move(temp.low(), src);
+        __ Move(src, dst);
+        __ Move(dst, temp.low());
+      } else {
+        DCHECK(destination->IsFPStackSlot());
+        MemOperand dst = g.ToMemOperand(destination);
+        __ Move(temp.low(), src);
+        __ vldr(src, dst);
+        __ vstr(temp.low(), dst);
+      }
     }
   } else if (source->IsFPStackSlot()) {
     DCHECK(destination->IsFPStackSlot());
     Register temp_0 = kScratchReg;
-    DwVfpRegister temp_1 = kScratchDoubleReg;
+    LowDwVfpRegister temp_1 = kScratchDoubleReg;
     MemOperand src0 = g.ToMemOperand(source);
-    MemOperand src1(src0.rn(), src0.offset() + kPointerSize);
     MemOperand dst0 = g.ToMemOperand(destination);
-    MemOperand dst1(dst0.rn(), dst0.offset() + kPointerSize);
-    __ vldr(temp_1, dst0);  // Save destination in temp_1.
-    __ ldr(temp_0, src0);   // Then use temp_0 to copy source to destination.
-    __ str(temp_0, dst0);
-    __ ldr(temp_0, src1);
-    __ str(temp_0, dst1);
-    __ vstr(temp_1, src0);
+    MachineRepresentation rep = LocationOperand::cast(source)->representation();
+    if (rep == MachineRepresentation::kFloat64) {
+      MemOperand src1(src0.rn(), src0.offset() + kPointerSize);
+      MemOperand dst1(dst0.rn(), dst0.offset() + kPointerSize);
+      __ vldr(temp_1, dst0);  // Save destination in temp_1.
+      __ ldr(temp_0, src0);   // Then use temp_0 to copy source to destination.
+      __ str(temp_0, dst0);
+      __ ldr(temp_0, src1);
+      __ str(temp_0, dst1);
+      __ vstr(temp_1, src0);
+    } else {
+      DCHECK_EQ(MachineRepresentation::kFloat32, rep);
+      __ vldr(temp_1.low(), dst0);  // Save destination in temp_1.
+      __ ldr(temp_0, src0);  // Then use temp_0 to copy source to destination.
+      __ str(temp_0, dst0);
+      __ vstr(temp_1.low(), src0);
+    }
   } else {
     // No other combinations are possible.
     UNREACHABLE();
   }
 }
 
 
 void CodeGenerator::AssembleJumpTable(Label** targets, size_t target_count) {
   // On 32-bit ARM we emit the jump tables inline.
   UNREACHABLE();
@@ skipping 19 matching lines @@
       padding_size -= v8::internal::Assembler::kInstrSize;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8