diff options
| author | Chris Robinson <[email protected]> | 2012-08-15 06:28:45 -0700 |
|---|---|---|
| committer | Chris Robinson <[email protected]> | 2012-08-15 06:28:45 -0700 |
| commit | f4ff63e2715b28e8ed1fd54e48e3ee6077f1689d (patch) | |
| tree | e7939b0157ea4c56774ab50410c7ba0439946346 | |
| parent | bbcf4e8c1d76948a901c4ab3e919d3c99c2e2459 (diff) | |
Check the max CPUID functions before calling them
| -rw-r--r-- | Alc/helpers.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/Alc/helpers.c b/Alc/helpers.c index 26a32b69..bf83bcbf 100644 --- a/Alc/helpers.c +++ b/Alc/helpers.c @@ -80,15 +80,22 @@ void FillCPUCaps(ALuint capfilter) ERR("Failed to get CPUID\n"); else { + unsigned int maxfunc = cpuinf[0].regs[0]; + unsigned int maxextfunc = 0; + + if(__get_cpuid(0x80000000, &cpuinf[0].regs[0], &cpuinf[0].regs[1], &cpuinf[0].regs[2], &cpuinf[0].regs[3])) + maxextfunc = cpuinf[0].regs[0]; + TRACE("Detected max CPUID function: 0x%x (ext. 0x%x)\n", maxfunc, maxextfunc); + TRACE("Vendor ID: \"%.4s%.4s%.4s\"\n", cpuinf[0].str+4, cpuinf[0].str+12, cpuinf[0].str+8); - if(__get_cpuid(0x80000002, &cpuinf[0].regs[0], &cpuinf[0].regs[1], &cpuinf[0].regs[2], &cpuinf[0].regs[3]) && + if(maxextfunc >= 0x80000004 && + __get_cpuid(0x80000002, &cpuinf[0].regs[0], &cpuinf[0].regs[1], &cpuinf[0].regs[2], &cpuinf[0].regs[3]) && __get_cpuid(0x80000003, &cpuinf[1].regs[0], &cpuinf[1].regs[1], &cpuinf[1].regs[2], &cpuinf[1].regs[3]) && __get_cpuid(0x80000004, &cpuinf[2].regs[0], &cpuinf[2].regs[1], &cpuinf[2].regs[2], &cpuinf[2].regs[3])) TRACE("Name: \"%.16s%.16s%.16s\"\n", cpuinf[0].str, cpuinf[1].str, cpuinf[2].str); - if(!__get_cpuid(1, &cpuinf[0].regs[0], &cpuinf[0].regs[1], &cpuinf[0].regs[2], &cpuinf[0].regs[3])) - ERR("Failed to get CPU features\n"); - else + if(maxfunc >= 1 && + __get_cpuid(1, &cpuinf[0].regs[0], &cpuinf[0].regs[1], &cpuinf[0].regs[2], &cpuinf[0].regs[3])) { #ifdef bit_SSE if((cpuinf[0].regs[3]&bit_SSE)) |