diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/util/u_cpu_detect.c | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/src/util/u_cpu_detect.c b/src/util/u_cpu_detect.c index 4df10c62ef5..abfea65b24d 100644 --- a/src/util/u_cpu_detect.c +++ b/src/util/u_cpu_detect.c @@ -92,7 +92,7 @@ static int has_cpuid(void); #endif -#if defined(PIPE_ARCH_PPC) && !defined(PIPE_OS_APPLE) +#if defined(PIPE_ARCH_PPC) && !defined(PIPE_OS_APPLE) && !defined(PIPE_OS_LINUX) static jmp_buf __lv_powerpc_jmpbuf; static volatile sig_atomic_t __lv_powerpc_canjump = 0; @@ -126,8 +126,29 @@ check_os_altivec_support(void) util_cpu_caps.has_altivec = 1; } } -#else /* !PIPE_OS_APPLE */ - /* not on Apple/Darwin, do it the brute-force way */ +#elif defined(PIPE_OS_LINUX) /* !PIPE_OS_APPLE */ +#if defined(PIPE_ARCH_PPC_64) + Elf64_auxv_t aux; +#else + Elf32_auxv_t aux; +#endif + int fd = open("/proc/self/auxv", O_RDONLY | O_CLOEXEC); + if (fd >= 0) { + while (read(fd, &aux, sizeof(aux)) == sizeof(aux)) { + if (aux.a_type == AT_HWCAP) { + char *env_vsx = getenv("GALLIVM_VSX"); + uint64_t hwcap = aux.a_un.a_val; + util_cpu_caps.has_altivec = (hwcap >> 28) & 1; + if (!env_vsx || env_vsx[0] != '0') { + util_cpu_caps.has_vsx = (hwcap >> 7) & 1; + } + break; + } + } + close(fd); + } +#else /* !PIPE_OS_APPLE && !PIPE_OS_LINUX */ + /* not on Apple/Darwin or Linux, do it the brute-force way */ /* this is borrowed from the libmpeg2 library */ signal(SIGILL, sigill_handler); if (setjmp(__lv_powerpc_jmpbuf)) { @@ -171,7 +192,7 @@ check_os_altivec_support(void) util_cpu_caps.has_altivec = 0; } } -#endif /* !PIPE_OS_APPLE */ +#endif /* !PIPE_OS_APPLE && !PIPE_OS_LINUX */ } #endif /* PIPE_ARCH_PPC */ |