detect-simd.lisp

   1 #|
   2 Copyright (c) 2005 Risto Laakso
   3 All rights reserved.
   4
   5 Redistribution and use in source and binary forms, with or without
   6 modification, are permitted provided that the following conditions
   7 are met:
   8 1. Redistributions of source code must retain the above copyright
   9    notice, this list of conditions and the following disclaimer.
  10 2. Redistributions in binary form must reproduce the above copyright
  11    notice, this list of conditions and the following disclaimer in the
  12    documentation and/or other materials provided with the distribution.
  13 3. The name of the author may not be used to endorse or promote products
  14    derived from this software without specific prior written permission.
  15
  16 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25 THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26 |#
  27 (in-package :sb-vm)
  28
  29 ;; simpler version
  30
  31 (define-vop (%detect-simd/x86)
  32   (:policy :fast)
  33
  34   (:results (res :scs (descriptor-reg)))
  35
  36   (:temporary (:sc unsigned-reg :offset eax-offset :from (:argument 0)) eax)
  37   (:temporary (:sc unsigned-reg :offset ebx-offset) ebx)
  38   (:temporary (:sc unsigned-reg :offset ecx-offset) ecx)
  39   (:temporary (:sc unsigned-reg :offset edx-offset) edx)
  40
  41   (:generator 10
  42               (inst mov eax 1)
  43               (inst cpuid)
  44               (inst mov ebx edx)
  45
  46               ;; sse3
  47               (inst and ecx 1)
  48               (inst shl ecx 2)
  49
  50               ;; sse2/3
  51               (inst shr edx 25)
  52               (inst and edx #b11)
  53               (inst or edx ecx)
  54
  55               ;; fixnumize
  56               (inst shl edx 2)
  57
  58               (inst mov res edx)))
  59