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Justine Tunney 2020-06-15 07:18:57 -07:00
commit c91b3c5006
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/*-*- mode:asm; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/nexgen32e/x86feature.h"
#include "libc/macros.h"
.yoink __FILE__
/ Dispatches to fastest windex() implementation.
.initbss 300,_init_windex
windex: .quad 0
.endobj windex,globl
.previous
.init.start 300,_init_windex
ezlea windex$avx2,ax
#if !X86_NEED(AVX2)
ezlea windex$sse4,dx
testb X86_HAVE(AVX2)+kCpuids(%rip)
cmovz %rdx,%rax
#endif /* AVX */
#if !X86_NEED(SSE4_2)
ezlea windex$k8,dx
testb X86_HAVE(SSE4_2)+kCpuids(%rip)
cmovz %rdx,%rax
#endif /* SSE4 */
stosq
.init.end 300,_init_windex