Revision: 19429
Author: [email protected]
Date: Tue Feb 18 09:59:02 2014 UTC
Log: A64: Optimize a loop by using post-indexing.
[email protected]
Review URL: https://codereview.chromium.org/169543002
http://code.google.com/p/v8/source/detail?r=19429
Modified:
/branches/bleeding_edge/src/a64/full-codegen-a64.cc
=======================================
--- /branches/bleeding_edge/src/a64/full-codegen-a64.cc Mon Feb 17 16:08:44
2014 UTC
+++ /branches/bleeding_edge/src/a64/full-codegen-a64.cc Tue Feb 18 09:59:02
2014 UTC
@@ -2805,16 +2805,13 @@
// Loop through all the keys in the descriptor array. If one of these is
the
// string "valueOf" the result is false.
- // TODO(all): optimise this loop to combine the add and ldr into an
- // addressing mode.
Register valueof_string = x1;
+ int descriptor_size = DescriptorArray::kDescriptorSize * kPointerSize;
__ Mov(valueof_string, Operand(isolate()->factory()->value_of_string()));
__ Bind(&loop);
- __ Ldr(x15, MemOperand(descriptors));
+ __ Ldr(x15, MemOperand(descriptors, descriptor_size, PostIndex));
__ Cmp(x15, valueof_string);
__ B(eq, if_false);
- __ Add(descriptors, descriptors,
- DescriptorArray::kDescriptorSize * kPointerSize);
__ Cmp(descriptors, descriptors_end);
__ B(ne, &loop);
--
--
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