Hi, I've prepared a patch for http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49547
I've also prepared a bunch of tests for lzcnt instuction generation.
ChangeLog entry:
2011-07-26 Kirill Yukhin <kirill.yuk...@intel.com>
PR target/49547
* config/i386/abmintrin.h (head): Added check if __LZCNT__ is defined.
(__lzcnt32): Fixed name according to Spec.
* config/i386/bmiintrin.h (head): Updated year for Copyright.
(__lzcnt_u16): Removed.
(__lzcnt_u32): Removed.
(__lzcnt_u64): Likewise.
* config/i386/cpuid.h: New bit defined.
* config/i386/driver-i386.c (host_detect_local_cpu): Detect
LZCNT feature.
* config/i386/i386-c.c (ix86_target_macros_internal): Define
__LZCNT__ if needed.
* config/i386/i386.c (ix86_target_string): New entry to array.
(ix86_option_override_internal): Handling LZCNT option.
(ix86_valid_target_attribute_inner_p): Likewise.
(bdesc_args): built-in for LZCNT is extended to work under
another flag.
* config/i386/i386.h (TARGET_LZCNT): New.
(CLZ_DEFINED_VALUE_AT_ZERO): Updated flag name.
* config/i386/i386.md (clz<mode>2): Target fixed.
(clz<mode>2_lzcnt): Likewise.
* doc/invoke.texi: Added mention of -mlzcnt option.
* doc/extend.texi: Likewise.
testsuite/ChangeLog entry:
2011-07-26 Kirill Yukhin <kirill.yuk...@intel.com>
* lib/target-supports.exp (check_lzcnt_hw_available): New.
(check_effective_target_lzcnt_runtime): Likewise.
(check_effective_target_lzcnt): Likewise.
* gcc.target/i386/lzcnt-1.c: New test.
* gcc.target/i386/lzcnt-2.c: Likewise.
* gcc.target/i386/lzcnt-2a.c: Likewise.
* gcc.target/i386/lzcnt-3.c: New test.
* gcc.target/i386/lzcnt-4.c: Likewise.
* gcc.target/i386/lzcnt-4a.c: Likewise.
* gcc.target/i386/lzcnt-5.c: Likewise.
* gcc.target/i386/lzcnt-6.c: Likewise.
* gcc.target/i386/lzcnt-6a.c: Likewise.
* gcc.target/i386/lzcnt-check.h: New driver to run LZCNT-*
tests only if HW available.
Bootstrapped, make-check-ed. No new fails.
OK for trunk?
Thanks, K
lzcnt.gcc.patch
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