Contribution of PowerPC port (continuation of 422063005). The inital patch
covers the core changes to the common files.  Subsequent patches will cover
changes to common files to support AIX and to update the ppc directories so
they are current with the changes in the rest of the project.

This is based off of the GitHub repository
https://github.com/andrewlow/v8ppc

BUG=
R=svenpanne@chromium.org, danno@chromium.org, sevnpanne@chromium.org

Review URL: https://codereview.chromium.org/817143002

Cr-Commit-Position: refs/heads/master@{#26091}

Patch from JF Bastien <jfb@google.com>.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/631703002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24402 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=chromium:412967
LOG=N
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/571903002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23938 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This reverts r23915.

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/569783003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23925 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org
BUG=chromium:412967
LOG=Y

Review URL: https://codereview.chromium.org/568753002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23915 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

When targeting the Microsoft ABI in 64bit mode, clang defines __x86_64__ but
doesn't define __LP64__ (Microsoft uses LLP64), so it would fall down the x32
path. cl.exe doesn't define __x86_64__ in the first place, so it didn't have
this problem.

Rather than trying to guess pointer size by looking at __x86_64__ and __LP64__,
check for pointer size directly using __POINTER_SIZE__. This is defined by both
gcc and clang, and eliminiates this problem.

This should fix hundreds of "error(clang): unknown type name 'Atomic64'" when
compiling v8 on Windows with clang for 64 bit.

BUG=chromium:82385
LOG=n
R=haitao.feng@intel.com, jochen@chromium.org

Review URL: https://codereview.chromium.org/560903002

Patch from Nico Weber <thakis@chromium.org>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23855 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

It used the wrong tests, anyway...

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/526993002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23542 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Summary:

- Changes in common code are mainly boilerplate changes,
gyp and test status files updates.

- On mips64 simulator all tests pass from all test units.

- Current issues: mjsunit JS debugger tests fail randomly on HW in release mode.
Corresponding tests are skipped on HW.

- Skipped tests on mips64: test-heap/ReleaseOverReservedPages, mjsunit/debug-*

TEST=
BUG=
R=danno@chromium.org, plind44@gmail.com, ulan@chromium.org

Review URL: https://codereview.chromium.org/371923006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22297 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Also split v8-core independent methods from checks.h to base/logging.h and
merge v8checks with the rest of checks.

The CPU::FlushICache method is moved to CpuFeatures::FlushICache

RoundUp and related methods are moved to base/macros.h

Remove all layering violations from src/libplatform

BUG=none
R=jkummerow@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/358363002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22092 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/18014003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21955 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

No clue why this seems to be an issue only for me, though...

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/321123002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21735 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

- this avoids using relative include paths which are forbidden by the style guide
- makes the code more readable since it's clear which header is meant
- allows for starting to use checkdeps

BUG=none
R=jkummerow@chromium.org, danno@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/304153016

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21625 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

With this, change, atomicops, once, and lazy instance are no longer dependant
on v8 core. I'll move them in a follow-up change to the libbase as well.

BUG=none
R=jkummerow@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/303463005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21546 ce2b1a6d-e550-0410-aec6-3dcde31c8c00