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[Bug gas/26212] New: doc for x86 incorrectly says that AVX-2 added 16 ne


From: sebastien at debian dot org
Subject: [Bug gas/26212] New: doc for x86 incorrectly says that AVX-2 added 16 new XMM/YMM registers
Date: Tue, 07 Jul 2020 10:51:12 +0000

https://sourceware.org/bugzilla/show_bug.cgi?id=26212

            Bug ID: 26212
           Summary: doc for x86 incorrectly says that AVX-2 added 16 new
                    XMM/YMM registers
           Product: binutils
           Version: 2.36 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gas
          Assignee: unassigned at sourceware dot org
          Reporter: sebastien at debian dot org
  Target Milestone: ---

The documentation (in i386 Dependent features, section “Register Naming”, file
c-i386.texi) says that:

   The AVX2 extensions made in 64-bit mode more registers available:

   * the 16 128-bit registers '%xmm16'-'%xmm31' and the 16 256-bit
     registers '%ymm16'-'%ymm31'.

This is incorrect. Those extra registers were added in AVX512.

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