I'm using Sun Studio 12.4 and 12.5 on Solaris 11. We have a source file that provides a straight C/C++ implementation of CRC32, or an optimized version of CRC32 using Intel intrinsics. At runtime, a function pointer is populated with the proper implementation.
Testing on a x86 server with dual Xeon's is producing the following because we are making code paths available based on compiler versions. SunCC 12.1 added support for SSE4 (if I parsed the matrix properly), so we attempt to enable it when __SUNPRO_CC >= 0x5100
.
"crc.cpp", line 311: ube: error: _mm_crc32_u8 intrinsic requires at least -xarch=sse4_2.
SunCC does not define customary GCC defines, like __SSE4_1__
and __SSE4_2__
. In addition, SunCC does not appear to make intrinsics available like MS VC++, where a compiler version indicates the support.
SunCC appears to enable features based on -xarch
options, but its not clear to me how to detect it in the preprocessor. In addition, using -xarch
sets some bits that cause the program to fail execute on downlevel processors (something like a "minimum" platform).
I have two questions.
- how do I detect the
-xarch
option in the preprocessor? - how do I disable the
-xarch
bits so the program can run on down level processors?
Below is from a macro dump compiling with -xarch=aes
. Notice there is nothing to indicate features available.
$ /opt/solarisstudio12.4/bin/CC -native -m64 -xarch=aes -xdumpmacros -E /dev/null 2>&1 | /usr/gnu/bin/sort --ignore-case
#1 "/dev/null"
#define __alignof__ __alignof
#define __amd64 1
#define __amd64__ 1
#define __ARRAYNEW 1
#define __asm asm
#define __asm__ asm
#define __attribute __attribute__
#define __builtin_constant_p __oracle_builtin_constant_p
#define __builtin_fpclassify __oracle_builtin_fpclassify
#define __builtin_huge_val __oracle_builtin_huge_val
#define __builtin_huge_valf __oracle_builtin_huge_valf
#define __builtin_huge_vall __oracle_builtin_huge_vall
#define __builtin_infinity __oracle_builtin_infinity
#define __builtin_isfinite __oracle_builtin_isfinite
#define __builtin_isgreater __oracle_builtin_isgreater
#define __builtin_isgreaterequal __oracle_builtin_isgreaterequal
#define __builtin_isinf __oracle_builtin_isinf
#define __builtin_isless __oracle_builtin_isless
#define __builtin_islessequal __oracle_builtin_islessequal
#define __builtin_islessgreater __oracle_builtin_islessgreater
#define __builtin_isnan __oracle_builtin_isnan
#define __builtin_isnormal __oracle_builtin_isnormal
#define __builtin_isunordered __oracle_builtin_isunordered
#define __builtin_nan __oracle_builtin_nan
#define __builtin_signbit __oracle_builtin_signbit
#define __BUILTIN_VA_STRUCT 1
#define __cplusplus 199711L
#define __DATE__ "Jul 11 2016"
#define __FILE__
#define __has_attribute(x) __oracle_has_attribute(x)
#define __has_nothrow_assign(x) __oracle_has_nothrow_assign(x)
#define __has_nothrow_constructor(x) __oracle_has_nothrow_constructor(x)
#define __has_nothrow_copy(x) __oracle_has_nothrow_copy(x)
#define __has_trivial_assign(x) __oracle_has_trivial_assign(x)
#define __has_trivial_constructor(x) __oracle_has_trivial_constructor(x)
#define __has_trivial_copy(x) __oracle_has_trivial_copy(x)
#define __has_trivial_destructor(x) __oracle_has_trivial_destructor(x)
#define __has_virtual_destructor(x) __oracle_has_virtual_destructor(x)
#define __is_abstract(x) __oracle_is_abstract(x)
#define __is_base_of(x,y) __oracle_is_base_of(x,y)
#define __is_class(x) __oracle_is_class(x)
#define __is_empty(x) __oracle_is_empty(x)
#define __is_enum(x) __oracle_is_enum(x)
#define __is_final(x) __oracle_is_final(x)
#define __is_literal_type(x) __oracle_is_literal_type(x)
#define __is_pod(x) __oracle_is_pod(x)
#define __is_polymorphic(x) __oracle_is_polymorphic(x)
#define __is_standard_layout(x) __oracle_is_standard_layout(x)
#define __is_trivial(x) __oracle_is_trivial(x)
#define __is_union(x) __oracle_is_union(x)
#define __LINE__
#define __LP64__ 1
#define __PRAGMA_REDEFINE_EXTNAME 1
#define __STDC__ 0
#define __sun 1
#define __SUN_PREFETCH 1
#define __SunOS 1
#define __SunOS_5_11 1
#define __SUNPRO_CC 0x5130
#define __SUNPRO_CC_COMPAT 5
#define __SVR4 1
#define __TIME__ "20:58:00"
#define __underlying_type(x) __oracle_underlying_type(x)
#define __unix 1
#define __volatile volatile
#define __volatile__ volatile
#define __x86_64 1
#define __x86_64__ 1
#define _BOOL 1
#define _LARGEFILE64_SOURCE 1
#define _LP64 1
#define _SIGNEDCHAR_ 1
#define _TEMPLATE_NO_EXTDEF 1
#define _WCHAR_T
#define sun 1
#define unix 1