diff --git a/pixman/pixman-pict.c b/pixman/pixman-pict.c index e2fd235..49a50c7 100644 --- a/pixman/pixman-pict.c +++ b/pixman/pixman-pict.c @@ -1987,7 +1987,59 @@ pixman_bool_t pixman_have_vmx (void) { return have_vmx; } -#else +#elif defined (__linux__) +#include +#include +#include +#include +#include +#include +#include + +pixman_bool_t pixman_have_vmx (void) +{ + if (!initialized) { + char fname[64]; + unsigned long buf[64]; + ssize_t count = 0; + pid_t pid; + int fd, i; + + pid = getpid(); + snprintf(fname, sizeof(fname)-1, "/proc/%d/auxv", pid); + + fd = open(fname, O_RDONLY); + if (fd >= 0) { + for (i = 0; i <= (count / sizeof(unsigned long)); i += 2) { + /* Read more if buf is empty... */ + if (i == (count / sizeof(unsigned long))) { + count = read(fd, buf, sizeof(buf)); + if (count <= 0) + break; + i = 0; + } + + if (buf[i] == AT_HWCAP) { + have_vmx = !!(buf[i+1] & PPC_FEATURE_HAS_ALTIVEC); + initialized = TRUE; + break; + } else if (buf[i] == AT_NULL) { + break; + } + } + close(fd); + } + } + if (!initialized) { + /* Something went wrong. Assume 'no' rather than playing + fragile tricks with catching SIGILL. */ + have_vmx = FALSE; + initialized = TRUE; + } + + return have_vmx; +} +#else /* !__APPLE__ && !__linux__ */ #include #include