diff options
Diffstat (limited to 'pm_config.in.h')
| -rw-r--r-- | pm_config.in.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/pm_config.in.h b/pm_config.in.h index c64fc093..9d0dc303 100644 --- a/pm_config.in.h +++ b/pm_config.in.h @@ -240,6 +240,20 @@ #endif #endif +#ifndef HAVE_WORKING_SSE2 +#if defined(__SSE2__) && ( GCCVERSION >=402 || defined(__clang__) ) + #define HAVE_WORKING_SSE2 1 + /* We can use SSE2 builtin functions to exploit SSE2 instructions. GCC + version 4.2 or newer is required; older GCC ostensibly has these SSE2 + builtins, but the compiler aborts with an error. Note that __SSE2__ + means not only that the compiler has the capability, but that the user + has not disabled it via compiler options. + */ +#else + #define HAVE_WORKING_SSE2 0 +#endif +#endif + /* UNALIGNED_OK means it's OK to do unaligned memory access, e.g. loading an 8-byte word from an address that is not a multiple of 8. On some systems, such an access causes a trap and a signal. |