> > The patch is OK for mainline, if there are no further comments in next 24h.
Thank you! According to Tobias's input, I've added few lines about RTM to doc/invoke.texi. If no objections - I'll commit the patch tomorrow. Updated patch attached. Updated ChangeLog entry: 2012-03-11 Kirill Yukhin <kirill.yuk...@intel.com> * doc/invoke.texi: Document -mrtm option. * common/config/i386/i386-common.c (OPTION_MASK_ISA_RTM_SET): New. (OPTION_MASK_ISA_RTM_UNSET): Ditto. (ix86_handle_option): Handle OPT_mrtm. * config.gcc (i[34567]86-*-*): Add rtmintrin.h and xtestintrin.h. (x86_64-*-*): Ditto. * i386-builtin-types.def (INT_FTYPE_VOID): New. * config/i386/i386-c.c (ix86_target_macros_internal): Define __RTM__ if needed. (ix86_target_string): Define -mrtm option. (PTA_RTM): New. (ix86_option_override_internal): Extend "cirei7-avx" with RTM option. Handle new option. (ix86_valid_target_attribute_inner_p): Add OPT_mrtm. (ix86_builtins): Add IX86_BUILTIN_XBEGIN, IX86_BUILTIN_XEND, IX86_BUILTIN_XTEST. (bdesc_special_args): Ditto. (ix86_init_mmx_sse_builtins): Add IX86_BUILTIN_XABORT. (ix86_expand_special_args_builtin): Handle new built-in type. (ix86_expand_builtin): Handle XABORT instruction. * config/i386/i386.h (TARGET_RTM): New. * config/i386/i386.md (UNSPECV_XBEGIN): New. (UNSPECV_XEND): Ditto. (UNSPECV_XABORT): Ditto. (UNSPECV_XTEST): Ditto. (xbegin): Ditto. (xbegin_1): Ditto. (xend): Ditto. (xabort): Ditto (xtest): Ditto. (xtest_1): Ditto. * config/i386/i386.opt (mrtm): New. * config/i386/immintrin.h: Include rtmintrin.h and xtestintrin.h. * config/i386/rtmintrin.h: New header. * config/i386/xtestintrin.h: Ditto. Thanks, K