Add cross test for vector itofp and fptoi casts.

Add cross test for vector itofp and fptoi casts.

Add the SZ runtime functions for unsigned conversion.
Add some more cast tests before doing emitIAS for cvt.

BUG=none
R=stichnot@chromium.org

Committed: https://gerrit.chromium.org/gerrit/gitweb?p=native_client/pnacl-subzero.git;a=commit;h=109fa15292072057ebcb12f8a69c496dd2486bf1

[jvoung (off chromium), 2014-10-07 21:37:46]

jvoung@chromium.org changed reviewers:
+ stichnot@chromium.org

[Jim Stichnoth, 2014-10-07 21:57:47]

https://codereview.chromium.org/639543002/diff/80001/crosstest/test_cast_main...
File crosstest/test_cast_main.cpp (right):

https://codereview.chromium.org/639543002/diff/80001/crosstest/test_cast_main...
crosstest/test_cast_main.cpp:94: volatile float Values[] = {
How about creating this array using FP_VALUE_ARRAY from test_arith.def?  That
would reduce code duplication, and also get NaNs and infinities tested in the
rest of the tests.

https://codereview.chromium.org/639543002/diff/80001/pydir/szbuild.py
File pydir/szbuild.py (right):

https://codereview.chromium.org/639543002/diff/80001/pydir/szbuild.py#newcode275
pydir/szbuild.py:275: 'gcc -m32 {partial} -o {exe} ' +
Could we avoid the above compilation step of szrt_i686.ll by using the
now-required clang toolchain and adding szrt_i686.ll as an argument?

[jvoung (off chromium), 2014-10-07 22:55:54]

https://codereview.chromium.org/639543002/diff/80001/crosstest/test_cast_main...
File crosstest/test_cast_main.cpp (right):

https://codereview.chromium.org/639543002/diff/80001/crosstest/test_cast_main...
crosstest/test_cast_main.cpp:94: volatile float Values[] = {
On 2014/10/07 21:57:47, stichnot wrote:
> How about creating this array using FP_VALUE_ARRAY from test_arith.def?  That
> would reduce code duplication, and also get NaNs and infinities tested in the
> rest of the tests.

Good idea -- done.

https://codereview.chromium.org/639543002/diff/80001/pydir/szbuild.py
File pydir/szbuild.py (right):

https://codereview.chromium.org/639543002/diff/80001/pydir/szbuild.py#newcode275
pydir/szbuild.py:275: 'gcc -m32 {partial} -o {exe} ' +
On 2014/10/07 21:57:47, stichnot wrote:
> Could we avoid the above compilation step of szrt_i686.ll by using the
> now-required clang toolchain and adding szrt_i686.ll as an argument?

Good idea -- done.

[Jim Stichnoth, 2014-10-07 23:49:57]

lgtm

[jvoung (off chromium), 2014-10-08 00:22:56]

Committed patchset #6 (id:100001) manually as
109fa15292072057ebcb12f8a69c496dd2486bf1 (presubmit successful).