A64: More fixes to enable building for Android Arm64

A64: More fixes to enable building for Android Arm64

 - Fix android_target_arch after Android platform rename.
 - Specify gcc tool names rather than using wildcards (this breaks in newer NDK
   versions due to matching multiple tools in some cases.
 - Add missing non-simulator supportt to test-assembler-a64
 - Avoid ambiguous pow(int, int) error messages in test-platform.cc
 - Add support for GET_STACK_POINTER in test-platform.cc

R=rodolph.perfetta@arm.com

Committed: https://code.google.com/p/v8/source/detail?r=19217

[rmcilroy, 2014-02-07 17:10:04]

PTAL.

[Rodolph Perfetta (ARM), 2014-02-07 17:53:11]

https://codereview.chromium.org/143003028/diff/40001/test/cctest/test-platfor...
File test/cctest/test-platform.cc (right):

https://codereview.chromium.org/143003028/diff/40001/test/cctest/test-platfor...
test/cctest/test-platform.cc:60: ASM("mov sp, x0; str x0, %0" : "=g" (sp_addr) :
: "x0"); \
You are moving x0 into sp, not what you meant.

As a side I wouldn't use x0, use ip0. this way you don;t for the compiler to
save and restore it.

https://codereview.chromium.org/143003028/diff/40001/test/cctest/test-platfor...
test/cctest/test-platform.cc:99: #undef GET_STACK_POINTERS
not part of your patch but there shouldn't be an S at the end.

[rmcilroy, 2014-02-07 19:02:09]

https://codereview.chromium.org/143003028/diff/40001/test/cctest/test-platfor...
File test/cctest/test-platform.cc (right):

https://codereview.chromium.org/143003028/diff/40001/test/cctest/test-platfor...
test/cctest/test-platform.cc:60: ASM("mov sp, x0; str x0, %0" : "=g" (sp_addr) :
: "x0"); \
On 2014/02/07 17:53:11, Rodolph Perfetta (ARM) wrote:
> You are moving x0 into sp, not what you meant.
> 
> As a side I wouldn't use x0, use ip0. this way you don;t for the compiler to
> save and restore it.

Done, thanks.  The assembler didn't know what ip0 was, so I've used x16 which
should be the same.

[Rodolph Perfetta (ARM), 2014-02-07 19:23:33]

lgtm

[rmcilroy, 2014-02-10 09:16:00]

Committed patchset #3 manually as r19217 (presubmit successful).