Paketti: amd64-baseline-support (26)

CPU feature checking - require amd64-baseline

The packages in the isa-support family probe for microprocessor Instruction Set Architecture features such as SSE3. By refusing to install on machines lacking a required feature, they allow ISA requirements to be handled in terms of package dependencies.

This is a mostly dummy package which checks for amd64-baseline and refuses to install on unsupported hardware.

This is the Micro-Architecture Levels baseline for Debian under x86-64 architecture, corresponding to x86-64 psABI v1.

This includes:

 - cmov instruction (CMOV instruction set),
 - cmpxchg8b ant other 64 bits atomics instruction (CX8 instruction set),
 - MMX a single instruction, multiple data (SIMD) instruction set,
 - streaming SIMD Extensions (SSE) set, a single instruction, multiple data
  (SIMD) instruction set extension,
 - SSE2 an incremental upgrade to SSE.

On ABIs other than the x86-64 psABI they select the same CPU features as the x86-64 psABI documents for the particular micro-architecture level.

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