Implement specialized IC code stubs for pixel array stores.

src/arm/ic-arm.cc

 // Copyright 2006-2008 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 1457 matching lines @@
   __ bind(&slow);
   // Entry registers are intact.
   // r0: value.
   // r1: key.
   // r2: receiver.
   GenerateRuntimeSetProperty(masm);
 
   // Check whether the elements is a pixel array.
   // r4: elements map.
   __ bind(&check_pixel_array);
-  __ LoadRoot(ip, Heap::kPixelArrayMapRootIndex);
-  __ cmp(r4, ip);
-  __ b(ne, &slow);
-  // Check that the value is a smi. If a conversion is needed call into the
-  // runtime to convert and clamp.
-  __ JumpIfNotSmi(value, &slow);
-  __ mov(r4, Operand(key, ASR, kSmiTagSize));  // Untag the key.
-  __ ldr(ip, FieldMemOperand(elements, PixelArray::kLengthOffset));
-  __ cmp(r4, Operand(ip));
-  __ b(hs, &slow);
-  __ mov(r5, Operand(value, ASR, kSmiTagSize));  // Untag the value.
-  __ Usat(r5, 8, Operand(r5));  // Clamp the value to [0..255].
-
-  // Get the pointer to the external array. This clobbers elements.
-  __ ldr(elements,
-         FieldMemOperand(elements, PixelArray::kExternalPointerOffset));
-  __ strb(r5, MemOperand(elements, r4));  // Elements is now external array.
-  __ Ret();
+  GenerateFastPixelArrayStore(masm,
+                              r2,
+                              r1,
+                              r0,
+                              elements,
+                              r4,
+                              r5,
+                              r6,
+                              false,
+                              false,
+                              NULL,
+                              &slow,
+                              &slow,
+                              &slow);
 
   // Extra capacity case: Check if there is extra capacity to
   // perform the store and update the length. Used for adding one
   // element to the array by writing to array[array.length].
   __ bind(&extra);
   // Condition code from comparing key and array length is still available.
   __ b(ne, &slow);  // Only support writing to writing to array[array.length].
   // Check for room in the elements backing store.
   // Both the key and the length of FixedArray are smis.
   __ ldr(ip, FieldMemOperand(elements, FixedArray::kLengthOffset));
@@ skipping 277 matching lines @@
     Register reg = Assembler::GetRn(instr_at_patch);
     patcher.masm()->tst(reg, Operand(kSmiTagMask));
     patcher.EmitCondition(eq);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM