tree 8b148db095230db88810bbd0d1cc0e9506ec1ff9
parent 6d217b5cc6cc60a7ce56f92522a7c017c6cf1468
author Sean Risser <srisser@google.com> 1629487151 -0400
committer swiftshader-scoped@luci-project-accounts.iam.gserviceaccount.com <swiftshader-scoped@luci-project-accounts.iam.gserviceaccount.com> 1629913144 +0000

Don't use global variables for CPUID

CPUID tracks device capabilities such as the availability of SSE
instructions, core count, and processor affinity. In order to avoid
costly system calls to determine this information, CPUID used several
static global variables initialized at startup.

However, in practice this added unnecessary complexity to CPUID and
doesn't actually improve performance.

This CL doesn't touch the OpenGL CPUID.

Bug: b/175073772
Change-Id: If69100014cec3e4aaaf7562196034d00c2bd5725
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/56508
Kokoro-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Sean Risser <srisser@google.com>
Commit-Queue: Sean Risser <srisser@google.com>