[v8-dev] Implementing Math.floor and Math.sqrt for crankshaft.

src/arm/assembler-arm.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 149 matching lines @@
   }
 
   int code_;
 };
 
 
 // Double word VFP register.
 struct DwVfpRegister {
   // d0 has been excluded from allocation. This is following ia32
   // where xmm0 is excluded. This should be revisited.
+  // Currently d0 is used as a scratch register.
+  // d1 has also been excluded from allocation to be used as a scratch

[Mads Ager (chromium), 2011/01/13 12:25:54]

I already landed this, but why is this in this patch? I don't see any use of
double_scratch()?

+  // register as well.
   static const int kNumRegisters = 16;
-  static const int kNumAllocatableRegisters = 15;
+  static const int kNumAllocatableRegisters = 14;
 
   static int ToAllocationIndex(DwVfpRegister reg) {
     ASSERT(reg.code() != 0);
     return reg.code() - 1;
   }
 
   static DwVfpRegister FromAllocationIndex(int index) {
     ASSERT(index >= 0 && index < kNumAllocatableRegisters);
-    return from_code(index + 1);
+    return from_code(index + 2);
   }
 
   static const char* AllocationIndexToString(int index) {
     ASSERT(index >= 0 && index < kNumAllocatableRegisters);
     const char* const names[] = {
-      "d1",
       "d2",
       "d3",
       "d4",
       "d5",
       "d6",
       "d7",
       "d8",
       "d9",
       "d10",
       "d11",
@@ skipping 1220 matching lines @@
  public:
   explicit EnsureSpace(Assembler* assembler) {
     assembler->CheckBuffer();
   }
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_ASSEMBLER_ARM_H_