ARM: Fast path for integer inputs to EmitVFPTruncate (issue 11049025)

[m.m.ca...@googlemail.com]

Reviewers: danno,

Message:
This patch should provide some performance improvement for the Mandreel
benchmark.

Description:
ARM: Fast path for integer inputs to EmitVFPTruncate

BUG=none
TEST=none

Please review this at http://codereview.chromium.org/11049025/

SVN Base: http://v8.googlecode.com/svn/branches/bleeding_edge/

Affected files:
M src/arm/code-stubs-arm.h
M src/arm/code-stubs-arm.cc
M src/arm/lithium-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/stub-cache-arm.cc

[da...@chromium.org]

lgtm



http://codereview.chromium.org/11049025/