From owner-FreeBSD-tech-jp@jp.freebsd.org  Mon Dec  6 23:32:51 1999
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Date: Mon, 06 Dec 1999 23:33:11 +0900
From: Issei Suzuki <issei@issei.org>
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Subject: [FreeBSD-tech-jp 2646] Re: SSE on FreeBSD
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In mail "[FreeBSD-tech-jp 2645] Re: SSE on FreeBSD"
Takekazu KATO <kato@chino.it.okayama-u.ac.jp> wrote:

> PentiumII $B$N$H$-$H(B PentiumIII $B$N$H$-$G!$$H$$$&$+(B CPUID.XMM bit $B$,N)$C(B
> $B$F$$$k$H$-$HN)$C$F$$$J$$$H$-$G!$(Bfxsave/fxrstor $B$N5sF0$OF1A3JQ$k$o$1$G(B
> $B$9$h$M!%(B

  $B%$%s%F%k!&%"!<%-%F%/%A%c!&%=%U%H%&%'%"!&%G%#%Y%m%C%Q!<%:!&%^%K%e%"%kCf(B
$B4,$+$i!#(B

----------------------------------------------------------------------
FXRSTOR

  CR4.OSFXSR $B%S%C%H$,%;%C%H$5$l$F$$$J$$>l9g$O!"J]B8%$%a!<%8Fb$N%9%H%j!<(B
$B%_%s%0(B SMID $B3HD%L?Na%U%#!<%k%I(B (XMM0 $B!A(B XMM7 $B$*$h$S(B MXCSR) $B$O%W%m%;%C%5(B
$B$K%m!<%I$5$l$J$$!#(B
----------------------------------------------------------------------


  XMM bit $B$,@_Dj$5$l$F$$$k$+$I$&$+$K0x$i$:!"(BFXSAVE, FXRSTOR $B%$%s%9%H%i%/(B
$B%7%g%s$N;H$$J}$O>o$K(B

  FXSAVE  m512byte
  FXRSTOR m512byte

$B$G$9!#$3$N(B 512byte $B$NFbLu$K$D$$$F$O!"%^%K%e%"%k$K5-=R$,$"$j$^$9$N$G!"$=(B
$B$A$i$r;2>H$7$F$/$@$5$$!#(B

  SMID $B3HD%L?Na$r;H$C$F$$$J$$>l9g$K$O!"(BFXSAVE $B$GJ]B8$7$?%a%b%j%$%a!<%8$N(B
XMM $B4XO"%U%#!<%k%I$K0UL#$N$J$$CM$,F~$C$F$/$k$@$1$G!"(Bkernel $BB&$G(B XMM $B%S%C(B
$B%H$r8+$F>l9gJ,$1$r9T$&I,MW$O$J$$$H;W$$$^$9!#(B

Issei.-
