Reviewers: ulan, danno,
Description:
ARM: Smi refactoring and improvements.
Refactoring:
* consistent use of SmiTag/Untag
* added a few Smi macros and helpers
Improvements
* small optimisations (e.g. merging untag and cmp #0)
* added fixed point to double conversion instructions for simpler
conversions
More on the last point: a Smi can be seen as a fixed point number with the
a one bit fractional part. Fixed to double instructions allow us to convert
a Smi to a double without untagging.
BUG=none
TEST=none
Please review this at https://codereview.chromium.org/15085026/
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files:
M src/arm/assembler-arm.h
M src/arm/assembler-arm.cc
M src/arm/builtins-arm.cc
M src/arm/code-stubs-arm.cc
M src/arm/codegen-arm.cc
M src/arm/debug-arm.cc
M src/arm/disasm-arm.cc
M src/arm/full-codegen-arm.cc
M src/arm/ic-arm.cc
M src/arm/lithium-codegen-arm.cc
M src/arm/macro-assembler-arm.h
M src/arm/macro-assembler-arm.cc
M src/arm/simulator-arm.cc
M src/arm/stub-cache-arm.cc
M test/cctest/test-assembler-arm.cc
M test/cctest/test-disasm-arm.cc
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