| /* { dg-do compile } */ |
| /* { dg-skip-if "" { powerpc*-*-darwin* } } */ |
| /* { dg-options "-O3 -mdejagnu-cpu=power7" } */ |
| /* { dg-require-effective-target lp64 } */ |
| /* { dg-require-effective-target powerpc_vsx_ok } */ |
| |
| #define NO_WARN_X86_INTRINSICS 1 |
| #include <x86intrin.h> |
| |
| unsigned long long |
| test__pexp_cmask_u64 (unsigned long long a[4]) |
| { |
| /* The _pext implmentation is nominally a popcount of the mask, |
| followed by a loop using count leading zeros to find the |
| next bit to process. |
| If the mask is a const, the popcount should be folded and |
| the constant propagation should eliminate the mask |
| generation loop and produce a single constant bpermd permute |
| control word. |
| This test verifies that the compiler is replacing the mask |
| popcount and loop with a const bperm control and generating |
| the bpermd for this case. */ |
| const unsigned long mask = 0x00000000100000a4UL; |
| unsigned long res; |
| res = _pext_u64 (a[0], mask); |
| res = (res << 8) | _pext_u64 (a[1], mask); |
| res = (res << 8) | _pext_u64 (a[2], mask); |
| res = (res << 8) | _pext_u64 (a[3], mask); |
| return (res); |
| } |
| /* the resulting assembler should have 4 X bpermd and no popcntd or |
| cntlzd instructions. */ |
| |
| /* { dg-final { scan-assembler-times "bpermd" 4 } } */ |
| /* { dg-final { scan-assembler-not "popcntd" } } */ |
| /* { dg-final { scan-assembler-not "cntlzd" } } */ |
