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[Bug gas/25550] New: Review .arch directives


From: hjl.tools at gmail dot com
Subject: [Bug gas/25550] New: Review .arch directives
Date: Thu, 13 Feb 2020 18:10:20 +0000

https://sourceware.org/bugzilla/show_bug.cgi?id=25550

            Bug ID: 25550
           Summary: Review .arch directives
           Product: binutils
           Version: 2.35 (HEAD)
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: gas
          Assignee: unassigned at sourceware dot org
          Reporter: hjl.tools at gmail dot com
  Target Milestone: ---
            Target: i386,x86-64

We need a way to build an object:

1. Without MMX, but with SSE, VEX and EVEX encodings
2. Without SEE nor MMX, but with VEX and EVEX encodings
3. Without SSE, MMX, AVX, but with EVEX encodings

which is enforced by assembler. ".arch" directives may be used to that.

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