Hi guys,
Here is a third part of patch, refactored by Kirill. This one adds
_addcarryx_u[32|64]  intrinsics.

Is it ok?

Changelog entry:
2012-07-31 Michael Zolotukhin <michael.v.zolotukhin@intel.com>

        * common/config/i386/i386-common.c (OPTION_MASK_ISA_ADX_SET): New.
        (OPTION_MASK_ISA_ADX_UNSET): Likewise.
        (ix86_handle_option): Handle madx option.
        * config.gcc (i[34567]86-*-*): Add adxintrin.h.
        (x86_64-*-*): Likewise.
        * config/i386/adxintrin.h: New header.
        * config/i386/driver-i386.c (host_detect_local_cpu): Detect ADCX/ADOX
        support.
        * config/i386/i386-builtin-types.def
        (UCHAR_FTYPE_UCHAR_UINT_UINT_PINT): New function type.
        (UCHAR_FTYPE_UCHAR_ULONGLONG_ULONGLONG_PINT): Likewise.
        * config/i386/i386-c.c: Define __ADX__ if needed.
        * config/i386/i386.c (ix86_target_string): Define -madx option.
        (PTA_ADX): New.
        (ix86_option_override_internal): Handle new option.
        (ix86_valid_target_attribute_inner_p): Add OPT_madx.
        (ix86_builtins): Add IX86_BUILTIN_ADDCARRYX32,
        IX86_BUILTIN_ADDCARRYX64.
        (ix86_init_mmx_sse_builtins): Define corresponding built-ins.
        (ix86_expand_builtin): Handle these built-ins.
        (ix86_expand_args_builtin): Handle new function types.
        * config/i386/i386.h (TARGET_ADX): New.
        * config/i386/i386.md (adcx<mode>): New define_expand.
        (adcx<mode>_carry): New define_insn.
        * config/i386/i386.opt (madx): New.
        * config/i386/x86intrin.h: Include adxintrin.h.

testsuite/Changelog entry:
2012-07-31 Michael Zolotukhin <michael.v.zolotukhin@intel.com>

        * gcc.target/i386/adx-addcarryx32-1.c: New.
        * gcc.target/i386/adx-addcarryx32-2.c: New.
        * gcc.target/i386/adx-addcarryx64-1.c: New.
        * gcc.target/i386/adx-addcarryx64-2.c: New.
        * gcc.target/i386/adx-check.h: New.
        * gcc.target/i386/i386.exp (check_effective_target_adx): New.
        * gcc.target/i386/sse-12.c: Add -madx.
        * gcc.target/i386/sse-13.c: Ditto.
        * gcc.target/i386/sse-14.c: Ditto.
        * gcc.target/i386/sse-22.c: Ditto.
        * gcc.target/i386/sse-23.c: Ditto.
        * g++.dg/other/i386-2.C: Ditto.
        * g++.dg/other/i386-3.C: Ditto.


Bootstrap and new tests are passing, other testing is in progress.


-- 
---
Best regards,
Michael V. Zolotukhin,
Software Engineer
Intel Corporation.