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Folks, Thanks a lot for prompts! I've updated my patch, so cmparing to previous it is: - have dedicated hook var, to define target dep. bits in mem model. Check (and warning) is performed in get_memmodel - prefix emit performed through dedicated operand type (%K) Updated ChangeLog entry: 2012-04-19 Kirill Yukhin <kirill.yukhin@intel.com> * builtins.c (get_memmodel):Check of upper bound with respect to target dependent mask. (expand_builtin_atomic_compare_exchange): Mask memmodel values. * config/i386/cpuid.h (bit_HLE): New. * config/i386/driver-i386.c (host_detect_local_cpu): Detect HLE support. * config/i386/i386-protos.h (ix86_generate_hle_prefix): New. * config/i386/i386-c.c (ix86_target_macros_internal): Set HLE defines. (ix86_target_string)<-mhle>: New. (ix86_option_override_internal)<PTA_HLE>: Ditto. (ix86_valid_target_attribute_inner_p)<OPT_mhle>: Ditto. * config/i386/i386.c (ix86_target_string)<OPTION_MASK_ISA_HLE>: New. (ix86_valid_target_attribute_inner_p)<OPT_mhle>: Ditto. (ix86_print_operand): Generate HLE lck prefixes. (TARGET_MEMMODEL_MASK): New. * config/i386/i386.h (OPTION_ISA_HLE): Ditto. (IX86_HLE_ACQUIRE): Ditto. (IX86_HLE_RELEASE): Ditto. * config/i386/i386.h (ix86_generate_hle_prefix): Ditto. * config/i386/i386.opt (mhle): Ditto. * config/i386/sync.md(atomic_compare_and_swap<mode>): Pass success model to instruction emitter. (atomic_fetch_add<mode>): Ditto. (atomic_exchange<mode>): Ditto. (atomic_add<mode>): Ditto. (atomic_sub<mode>): Ditto. (atomic_<code><mode>): Ditto. (*atomic_compare_and_swap_doubledi_pic): Ditto. (atomic_compare_and_swap_single<mode>): Define and use argument for success model. (atomic_compare_and_swap_double<mode>): Ditto. * configure.ac: Check if assembler support HLE prefixes. * configure: Regenerate. * config.in: Ditto. testsuite/ChangeLog unchanged. Patch attached. Thanks, K
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