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gallium/u_cpu_detect: fix parsing the CPU family

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According to:
https://support.amd.com/TechDocs/54945_PPR_Family_17h_Models_00h-0Fh.pdf

Also Intel:
https://www.microbe.cz/docs/CPUID.pdf

Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Marek Olšák 2018-09-05 20:11:34 -04:00
parent a84fd58f48
commit ce432e259d
1 changed files with 2 additions and 1 deletions
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3
src/gallium/auxiliary/util/u_cpu_detect.c
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@ -420,8 +420,9 @@ util_cpu_detect_once(void)
cpuid (0x00000001, regs2);
util_cpu_caps.x86_cpu_type = (regs2[0] >> 8) & 0xf;
/* Add "extended family". */
if (util_cpu_caps.x86_cpu_type == 0xf)
util_cpu_caps.x86_cpu_type = 8 + ((regs2[0] >> 20) & 255); /* use extended family (P4, IA64) */
util_cpu_caps.x86_cpu_type += ((regs2[0] >> 20) & 0xff);
/* general feature flags */
util_cpu_caps.has_tsc = (regs2[3] >> 4) & 1; /* 0x0000010 */