diff options
| author | Brecht Van Lommel <brechtvanlommel@pandora.be> | 2011-11-15 19:13:38 +0400 |
|---|---|---|
| committer | Brecht Van Lommel <brechtvanlommel@pandora.be> | 2011-11-15 19:13:38 +0400 |
| commit | db8024f4b54ac4cf83b5346fe1548c009fd21082 (patch) | |
| tree | b005764126eff5502fcbae63048b0d17a46d6778 /intern/cycles/util/util_system.cpp | |
| parent | 2bc78219135eba9b8079dc69ea7fd062a283a9b3 (diff) | |
Fix #29259: cycles issues on certain processors. Now two versions of the kernel
are compiled, one SSE optimized and the other not, and it will choose between
them at runtime.
Diffstat (limited to 'intern/cycles/util/util_system.cpp')
| -rw-r--r-- | intern/cycles/util/util_system.cpp | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/intern/cycles/util/util_system.cpp b/intern/cycles/util/util_system.cpp index 8b09f227a74..abf5e08de97 100644 --- a/intern/cycles/util/util_system.cpp +++ b/intern/cycles/util/util_system.cpp @@ -118,5 +118,78 @@ int system_cpu_bits() return (sizeof(void*)*8); } +#if defined(__x86_64__) || defined(_M_X64) || defined(i386) || defined(_M_IX86) + +struct CPUCapabilities { + bool x64; + bool mmx; + bool sse; + bool sse2; + bool sse3; + bool ssse3; + bool sse41; + bool sse42; + bool sse4a; + bool avx; + bool xop; + bool fma3; + bool fma4; +}; + +bool system_cpu_support_optimized() +{ + static CPUCapabilities caps; + static bool caps_init = false; + + if(!caps_init) { + int result[4], num, num_ex; + + memset(&caps, 0, sizeof(caps)); + + __cpuid(result, 0); + num = result[0]; + + __cpuid(result, 0x80000000); + num_ex = result[0]; + + if(num >= 1){ + __cpuid(result, 0x00000001); + caps.mmx = (result[3] & ((int)1 << 23)) != 0; + caps.sse = (result[3] & ((int)1 << 25)) != 0; + caps.sse2 = (result[3] & ((int)1 << 26)) != 0; + caps.sse3 = (result[2] & ((int)1 << 0)) != 0; + + caps.ssse3 = (result[2] & ((int)1 << 9)) != 0; + caps.sse41 = (result[2] & ((int)1 << 19)) != 0; + caps.sse42 = (result[2] & ((int)1 << 20)) != 0; + + caps.avx = (result[2] & ((int)1 << 28)) != 0; + caps.fma3 = (result[2] & ((int)1 << 12)) != 0; + } + + /*if(num_ex >= 0x80000001){ + __cpuid(result, 0x80000001); + caps.x64 = (result[3] & ((int)1 << 29)) != 0; + caps.sse4a = (result[2] & ((int)1 << 6)) != 0; + caps.fma4 = (result[2] & ((int)1 << 16)) != 0; + caps.xop = (result[2] & ((int)1 << 11)) != 0; + }*/ + + caps_init = true; + } + + /* optimization flags use these */ + return caps.sse && caps.sse2 && caps.sse3; +} + +#else + +bool system_cpu_support_optimized() +{ + return false; +} + +#endif + CCL_NAMESPACE_END |