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| author | Matt Turner <mattst88@gmail.com> | 2015-02-28 10:06:26 -0800 |
|---|---|---|
| committer | Matt Turner <mattst88@gmail.com> | 2015-02-28 12:20:31 -0800 |
| commit | e71a7f8013e540281d17a0aa1aaa3a3051592ac8 (patch) | |
| tree | e1bfb2f2a1e7d125eae13b8eed6f9b17de5a3b87 /src/mesa/x86/common_x86.c | |
| parent | 5666d9266fd43d552c76ce7b472abc0afde6c32b (diff) | |
| download | external_mesa3d-e71a7f8013e540281d17a0aa1aaa3a3051592ac8.zip external_mesa3d-e71a7f8013e540281d17a0aa1aaa3a3051592ac8.tar.gz external_mesa3d-e71a7f8013e540281d17a0aa1aaa3a3051592ac8.tar.bz2 | |
mesa: Check return value of __get_cpuid().
The use of the uninitialized_var() macro was to silence an uninitialized
variable warning that I assumed stemmed from gcc being unable to see
inside __get_cpuid() or understand its inline assembly.
In fact, it was because the __get_cpuid() function can fail, and not
initialize its arguments. Instead, check for failure and return early.
Reviewed-by: Brian Paul <brianp@vmware.com>
Diffstat (limited to 'src/mesa/x86/common_x86.c')
| -rw-r--r-- | src/mesa/x86/common_x86.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/mesa/x86/common_x86.c b/src/mesa/x86/common_x86.c index 25f5c40..14b497d 100644 --- a/src/mesa/x86/common_x86.c +++ b/src/mesa/x86/common_x86.c @@ -344,13 +344,13 @@ _mesa_get_x86_features(void) #elif defined(USE_X86_64_ASM) { - unsigned int uninitialized_var(eax), uninitialized_var(ebx), - uninitialized_var(ecx), uninitialized_var(edx); + unsigned int eax, ebx, ecx, edx; /* Always available on x86-64. */ _mesa_x86_cpu_features |= X86_FEATURE_XMM | X86_FEATURE_XMM2; - __get_cpuid(1, &eax, &ebx, &ecx, &edx); + if (!__get_cpuid(1, &eax, &ebx, &ecx, &edx)) + return; if (ecx & bit_SSE4_1) _mesa_x86_cpu_features |= X86_FEATURE_SSE4_1; |