NEON intrinsics cannot be used when compiling for an ARM CPU without
hardware floating point support, e.g. the Debian armel port. In this
case arm_neon.h cannot even be included as it causes an #error.
[Based on a patch by Adrian Bunk <bunk@debian.org>, but changed to check
for __ARM_FP instead of !__SOFTFP__ to be consistent with arm_neon.h,
and added a comment.]
All 64bit PowerPC CPUs handle unaligned accesses reasonably fast, so
set UNALIGNED_ACCESS_IS_FAST.
Decompression of the snappy html test case is almost 50% faster on
POWER9 with this patch applied.
Now that we detect CPU features on 32-bit x86, allow the SSE2
implementation of Adler-32 to be selected at runtime based on the
presence of the SSE2 feature.
Replace COMPILER_SUPPORTS_TARGET_INTRINSICS with macros for the
individual features, since COMPILER_SUPPORTS_TARGET_INTRINSICS was
x86-specific and would cause confusion when we try to use intrinsics in
'target' functions for other architectures.
With clang 3.9:
warning: macro expansion producing 'defined' has undefined
behavior [-Wexpansion-to-defined]
Just eliminate the tests for clang and icc; they shouldn't be necessary.
* Bring in common headers and program code from xpack project
* Move program code to programs/
* Move library code to lib/
* GNU89 and MSVC2010 compatibility
* Other changes
