Arm support for DoubleToIStub (truncating).

src/arm/stub-cache-arm.cc

 // Copyright 2012 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3314 matching lines @@
       __ vldr(d0, r5, HeapNumber::kValueOffset);
       __ add(r5, r3, Operand(key, LSL, 1));
       __ vcvt_f32_f64(s0, d0);
       __ vstr(s0, r5, 0);
     } else if (elements_kind == EXTERNAL_DOUBLE_ELEMENTS) {
       __ sub(r5, r0, Operand(kHeapObjectTag));
       __ vldr(d0, r5, HeapNumber::kValueOffset);
       __ add(r5, r3, Operand(key, LSL, 2));
       __ vstr(d0, r5, 0);
     } else {
-      // Hoisted load.  vldr requires offset to be a multiple of 4 so we can
-      // not include -kHeapObjectTag into it.
-      __ sub(r5, value, Operand(kHeapObjectTag));
-      __ vldr(d0, r5, HeapNumber::kValueOffset);
-      __ ECMAToInt32(r5, d0, r6, r7, r9, d1);
+      __ TruncateDoubleToI(r5, value,
+                           HeapNumber::kValueOffset - kHeapObjectTag);
 
       switch (elements_kind) {
         case EXTERNAL_BYTE_ELEMENTS:
         case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
           __ strb(r5, MemOperand(r3, key, LSR, 1));
           break;
         case EXTERNAL_SHORT_ELEMENTS:
         case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
           __ strh(r5, MemOperand(r3, key, LSL, 0));
           break;
@@ skipping 341 matching lines @@
     TailCallBuiltin(masm, Builtins::kKeyedStoreIC_Slow);
   }
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM